JPH10258337A - Composite roll for steel making rolling mill excellent in wear resistance and method therefor - Google Patents
Composite roll for steel making rolling mill excellent in wear resistance and method thereforInfo
- Publication number
- JPH10258337A JPH10258337A JP8224897A JP8224897A JPH10258337A JP H10258337 A JPH10258337 A JP H10258337A JP 8224897 A JP8224897 A JP 8224897A JP 8224897 A JP8224897 A JP 8224897A JP H10258337 A JPH10258337 A JP H10258337A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- base material
- wear resistance
- molten metal
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 30
- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 238000009628 steelmaking Methods 0.000 title abstract description 5
- 238000000034 method Methods 0.000 title description 12
- 239000000463 material Substances 0.000 claims abstract description 77
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 31
- 229910001122 Mischmetal Inorganic materials 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000003754 machining Methods 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 4
- 239000010953 base metal Substances 0.000 claims abstract 3
- 239000000956 alloy Substances 0.000 claims description 12
- 238000005299 abrasion Methods 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims 1
- 229910052804 chromium Inorganic materials 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 2
- 229910052721 tungsten Inorganic materials 0.000 abstract description 2
- 229910052720 vanadium Inorganic materials 0.000 abstract description 2
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 19
- 230000000694 effects Effects 0.000 description 19
- 239000011651 chromium Substances 0.000 description 14
- 150000001247 metal acetylides Chemical class 0.000 description 12
- 238000009749 continuous casting Methods 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 7
- 230000008018 melting Effects 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 238000007872 degassing Methods 0.000 description 5
- 238000005097 cold rolling Methods 0.000 description 4
- 238000005098 hot rolling Methods 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 239000005388 borosilicate glass Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003028 elevating effect Effects 0.000 description 2
- 229910001651 emery Inorganic materials 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000007712 rapid solidification Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- -1 samarium (Sm) Chemical class 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Landscapes
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、製鉄熱間圧延設備
又は製鉄冷間圧延設備における圧延用ロール及び矯正用
ロールに使用する耐摩耗性に優れた製鉄圧延設備用複合
ロール及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite roll for use in a steelmaking hot rolling mill or a cold rolling mill, which has excellent wear resistance and is used as a rolling roll and a straightening roll, and a method for producing the same. .
【０００２】[0002]
【従来の技術】従来の製鉄圧延設備用の圧延ロール材と
しては、適度の耐摩耗性を有した〔Ｃ〕２．３〜２．９
重量％、〔Ｓｉ〕０．４〜０．９重量％、〔Ｍｎ〕０．
８〜１．２重量％、〔Ｃｒ〕１３〜１８重量％、〔Ｍ
ｏ〕０．７〜２重量％、〔Ｎｉ〕０．５〜１．５重量
％、〔Ｎｂ〕１重量％以下、〔Ｖ〕１重量％以下の高ク
ロム鋳鉄或いは、〔Ｃ〕３．２〜３．４重量％、〔Ｓ
ｉ〕０．７〜０．９重量％、〔Ｍｎ〕０．５〜０．８重
量％、〔Ｃｒ〕１．５〜１．９重量％、〔Ｍｏ〕０．３
〜０．６重量％、〔Ｎｉ〕４．２〜４．６重量％の高合
金グレン材が広く使用されている（「わが国における最
近のホットストリップの製造技術」１４８頁参照、日本
鉄鋼協会、昭和６２年８月１０日発行）。また、従来の
製鉄圧延設備用の矯正ロール材については、ＪＩＳＧ４
４０４のＳＫＤ１１合金工具鋼が広く採用されて来た。
近年、ロール材として、従来の高速度鋼よりも炭素量を
増やして、共晶炭化物を多く晶出させた多合金材料、即
ち多種類の合金元素を含有する材料が研究されており
（「鋳物」、６６（１９９４）、Ｎｏ．１１、頁８１５
〜８２１）、その一例として、〔Ｃ〕２．５重量％以
下、〔Ｃｒ〕２〜７重量％、〔Ｍｏ〕２〜９重量％、
〔Ｗ〕１０重量％以下、〔Ｖ〕３重量％以上の多合金材
料により圧延ロールの耐摩耗性向上が図られ、高クロム
鋳鉄系の数倍の寿命を持つことが知られている（「鉄と
鋼」、８０（１９９４）、Ｎｏ．７、頁３８６〜３８
９）。また、圧延設備用複合ロール材として、特願平７
−２５６８３６号において、連続鋳掛け法により〔Ｃ〕
０．５〜２重量％、〔Ｓｉ〕０．１〜１．５重量％、
〔Ｍｎ〕０．１〜１．５重量％、〔Ｃｒ〕２〜１５重量
％、〔Ｍｏ〕２〜１０重量％、〔Ｖ〕１〜８重量％、
〔Ｗ〕１〜１０重量％、〔Ｃｏ〕１〜１５重量％を含有
した鉄基複合ロール材が提案され、耐摩耗性の向上が図
られた。2. Description of the Related Art As a conventional roll material for a steel rolling mill, [C] 2.3 to 2.9 having moderate wear resistance was used.
Wt%, [Si] 0.4 to 0.9 wt%, [Mn] 0.
8 to 1.2% by weight, [Cr] 13 to 18% by weight, [M
o] 0.7 to 2% by weight, [Ni] 0.5 to 1.5% by weight, [Nb] 1% by weight or less, [V] 1% by weight or less high-chromium cast iron or [C] 3.2 ~ 3.4% by weight, [S
i] 0.7 to 0.9% by weight, [Mn] 0.5 to 0.8% by weight, [Cr] 1.5 to 1.9% by weight, [Mo] 0.3
A high alloy grit material of 0.6 to 0.6% by weight and [Ni] 4.2 to 4.6% by weight is widely used (see "Recent Hot Strip Production Technology in Japan", page 148, The Iron and Steel Institute of Japan, Published on August 10, 1987). In addition, the conventional straightening roll material for steel rolling equipment is described in JISG4.
404 SKD11 alloy tool steel has been widely adopted.
In recent years, as a roll material, a multi-alloy material in which the amount of carbon is increased more than that of a conventional high-speed steel and a large amount of eutectic carbide is crystallized, that is, a material containing many types of alloy elements, has been studied (“casting”). 66, (1994), No. 11, page 815.
821), for example, [C] 2.5% by weight or less, [Cr] 2 to 7% by weight, [Mo] 2 to 9% by weight,
It is known that the wear resistance of a rolling roll is improved by using a multi-alloy material of [W] 10% by weight or less and [V] 3% by weight or more, and has a life several times longer than that of a high chromium cast iron system (" Iron and Steel ", 80 (1994), No. 7, pp. 386-38.
9). Also, as a composite roll material for rolling equipment, Japanese Patent Application No.
No.-256836, the continuous casting method [C]
0.5 to 2% by weight, [Si] 0.1 to 1.5% by weight,
[Mn] 0.1 to 1.5% by weight, [Cr] 2 to 15% by weight, [Mo] 2 to 10% by weight, [V] 1 to 8% by weight,
An iron-based composite roll material containing 1 to 10% by weight of [W] and 1 to 15% by weight of [Co] has been proposed, and the abrasion resistance has been improved.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、近年、
鋼の圧延ラインにおいては、高圧化、高速連続圧延化、
ステンレス鋼や珪素鋼のような難圧延材の増加、或いは
製品の薄物化が進み、ロールの使用条件は苛酷化の一途
をたどっている。例えば、製鉄圧延設備用圧延ロールに
ついて、摩耗が激しく、耐摩耗性向上のニーズが高くな
っている。上記摩耗が増大することによって、鋼板製品
の板厚精度の悪化と共に、ロールの取り替え頻度も多く
なり圧延効率が低下している。前記高クロム鋳鉄、高合
金グレン材及びＳＫＤ１１合金工具鋼においては、圧延
ラインの益々高くなってきた要求レベルを到底満足する
ものではなく、また、前記した「鉄と鋼」刊行物に記載
された多合金材料及び特願平７−２５６８３６号に提案
された連続鋳掛けロール材において、かなりの効果は得
られているものの合金成分、溶湯処理方法及び製造プロ
セスの組み合わせによって、更に耐摩耗性を向上する必
要がある。特に、上記ロール使用条件の苛酷化に伴い、
微小なピンホール、ブローホールがロールの肌荒れの起
点になったり、耐摩耗性が劣化する問題が生じて来た。
本発明はかかる事情に鑑みてなされたもので、耐摩耗性
を高位の水準に高め、製鉄熱間又は冷間圧延設備におけ
る圧延用ロール及び矯正用ロールに使用する耐摩耗性に
優れた製鉄圧延設備用複合ロール及びその製造方法を提
供することを目的とする。However, in recent years,
In the steel rolling line, high pressure, high speed continuous rolling,
As the use of hard-rolled materials such as stainless steel and silicon steel increases, or the products become thinner, the use conditions of the rolls are becoming severer. For example, with regard to rolling rolls for iron-making rolling equipment, wear is severe, and there is an increasing need for improving wear resistance. Due to the increase in the wear, the accuracy of thickness of the steel sheet product is deteriorated, and the frequency of roll replacement is increased, and the rolling efficiency is reduced. The high-chromium cast iron, high-alloy grain material and SKD11 alloy tool steel do not satisfy the increasingly high required level of the rolling line at all, and are described in the above-mentioned "Iron and Steel" publication. In the multi-alloy material and the continuous casting roll material proposed in Japanese Patent Application No. 7-256836, although a considerable effect is obtained, the wear resistance is further improved by a combination of alloy components, a molten metal treatment method and a manufacturing process. There is a need. In particular, with the use of the rolls becoming more severe,
Fine pinholes and blowholes have become the starting points for roughening of the roll, and there have been problems in that wear resistance is deteriorated.
The present invention has been made in view of such circumstances, and has improved wear resistance to a high level, and has excellent wear resistance for use in a rolling roll and a straightening roll in a hot or cold rolling mill for steelmaking. An object is to provide a composite roll for equipment and a method for producing the same.
【０００４】[0004]
【課題を解決するための手段】前記目的に沿う請求項１
記載の耐摩耗性に優れた製鉄圧延設備用複合ロールは、
電磁誘導加熱コイルを備えた耐火性加熱型の下部に、冷
却型を一体的に配置した組み合わせモールドを用い、該
組み合わせモールドの内部に鋼を素材とする中実又は中
空の母材を同心垂直に挿入し、該母材の外周の環状空隙
部に、別途準備した溶湯を注入し、前記母材を断続的に
降下させて、該母材外表面に前記溶湯を溶着させなが
ら、冷却により凝固せしめて、該母材の外周に肉盛層を
形成し、所定の熱処理、機械加工を行なって製造される
製鉄圧延設備用複合ロールであって、前記溶湯の成分
は、〔Ｃ〕１〜３重量％、〔Ｓｉ〕０．１〜１重量％、
〔Ｍｎ〕０．１〜１重量％、〔Ｃｒ〕４〜１５重量％、
〔Ｍｏ〕４〜１５重量％、〔Ｖ〕４〜１５重量％、
〔Ｗ〕１０重量％以下、〔Ｃｏ〕１０重量％以下、〔Ｎ
ｉ〕５重量％以下、残部は実質的にＦｅ及び不可避的不
純物元素からなる原溶湯に、外分でミッシュメタル０．
１〜２重量％を添加したものからなっている。According to the present invention, there is provided a semiconductor device comprising:
The described composite rolls for steel rolling equipment with excellent wear resistance are:
At the bottom of the refractory heating mold equipped with an electromagnetic induction heating coil, a combined mold in which a cooling mold is integrally arranged is used, and a solid or hollow base material made of steel is concentrically vertically arranged inside the combined mold. Inject the separately prepared molten metal into the annular space around the outer periphery of the base material, intermittently lower the base material, and solidify by cooling while melting the molten metal on the outer surface of the base material. A composite roll for an iron rolling plant manufactured by forming a build-up layer on the outer periphery of the base material and performing predetermined heat treatment and machining, wherein the component of the molten metal is [C] 1 to 3 weight %, [Si] 0.1 to 1% by weight,
[Mn] 0.1-1% by weight, [Cr] 4-15% by weight,
[Mo] 4 to 15% by weight, [V] 4 to 15% by weight,
[W] 10% by weight or less, [Co] 10% by weight or less, [N
i] 5% by weight or less, with the balance being a raw molten metal substantially composed of Fe and unavoidable impurity elements, and an external part containing 0.1% of misch metal.
1 to 2% by weight is added.
【０００５】また、請求項２記載の耐摩耗性に優れた製
鉄圧延設備用複合ロールの製造方法は、電磁誘導加熱コ
イルを備えた耐火性加熱型の下部に、冷却型を一体的に
配置した組み合わせモールドを用い、該組み合わせモー
ルドの内部に鋼を素材とする中実又は、中空の母材を同
心垂直に挿入し、同母材の外周の環状空隙部に、別途、
準備したＳｉ及びＭｎ成分の低い耐摩耗性を有する多合
金材料からなる原溶湯に、外分でミッシュメタル０．１
〜２重量％を添加した溶湯を注入し、前記母材を断続的
に降下させて、該母材外表面に溶湯を溶着させながら、
冷却により凝固せしめて、該母材の外周に肉盛層を形成
し、所定の熱処理、機械加工を行って製造している。According to a second aspect of the present invention, there is provided a method of manufacturing a composite roll having excellent wear resistance for a steel mill, in which a cooling mold is integrally disposed below a refractory heating mold having an electromagnetic induction heating coil. Using a combination mold, a solid or hollow base material made of steel is inserted concentrically vertically into the interior of the combination mold, and separately into an annular space around the outer periphery of the base material,
0.1% of misch metal is added to the prepared raw molten metal composed of a polyalloy material having low wear resistance containing Si and Mn components.
２2% by weight is added to the molten metal, the base material is intermittently lowered, and the molten metal is welded to the outer surface of the base material.
It is solidified by cooling, a build-up layer is formed on the outer periphery of the base material, and a predetermined heat treatment and machining are performed to manufacture.
【０００６】そして、請求項３記載の耐摩耗性に優れた
製鉄圧延設備用複合ロールの製造方法は、請求項２記載
の製造方法において、前記原溶湯の成分は、〔Ｃ〕１〜
３重量％、〔Ｓｉ〕０．１〜１重量％、〔Ｍｎ〕０．１
〜１重量％、〔Ｃｒ〕４〜１５重量％、〔Ｍｏ〕４〜１
５重量％、〔Ｖ〕４〜１５重量％、〔Ｗ〕１０重量％以
下、〔Ｃｏ〕１０重量％以下、〔Ｎｉ〕５重量％以下、
残部は実質的にＦｅ及び不可避的不純物元素からなって
いる。According to a third aspect of the present invention, there is provided a method for producing a composite roll for steel rolling equipment having excellent wear resistance, wherein the components of the raw molten metal are [C] 1 to
3% by weight, [Si] 0.1-1% by weight, [Mn] 0.1
-1% by weight, [Cr] 4-15% by weight, [Mo] 4-1
5% by weight, [V] 4 to 15% by weight, [W] 10% by weight or less, [Co] 10% by weight or less, [Ni] 5% by weight or less,
The remainder substantially consists of Fe and inevitable impurity elements.
【０００７】以上において、ミッシュメタルとは希土類
金属の中でも軽希土と呼ばれるランタン（Ｌａ）、セリ
ウム（Ｃｅ）、プラセオジム（Ｐｒ）、ネオジム（Ｎ
ｄ）、サマリウム（Ｓｍ）等からなる混合希土類金属、
即ち、希土類金属がミックスされたメタルである。その
一例として、本発明に使用されたミッシュメタルの成分
は、〔Ｃｅ〕５０．９０重量％、〔Ｌａ〕２４．０６重
量％、〔Ｎｄ〕１７．９６重量％、〔Ｐｒ〕５．６２重
量％、〔Ｓｍ〕０．０３重量％、及びその他の元素（Ｆ
ｅ、Ｍｇ、Ａｌ等）１．４３重量％からなる。[0007] In the above, the misch metal is lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (N
d), a mixed rare earth metal such as samarium (Sm),
That is, it is a metal in which a rare earth metal is mixed. As an example, the components of the misch metal used in the present invention are [Ce] 50.90% by weight, [La] 24.06% by weight, [Nd] 17.96% by weight, [Pr] 5.62% by weight. %, [Sm] 0.03% by weight, and other elements (F
e, Mg, Al, etc.) of 1.43% by weight.
【０００８】[0008]
【発明の実施の形態】続いて、添付した図面を参照しつ
つ、本発明の実施の形態につき説明し、本発明の理解に
供する。本発明材の製造方法は、基本的には本出願人が
提案した特公昭４４−４９０３号公報（特許第５５２６
３７号）及び特公昭５３−４７７６７号公報（特許第９
６５８８８）に示された連続鋳掛け法である。ここに、
図１は本発明の一実施の形態に係る耐摩耗性に優れた製
鉄圧延設備用複合ロールの製造方法に好適に使用できる
組み合わせモールドの概略説明図（連続鋳掛け法の概略
説明図）である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. The method for producing the material of the present invention is basically the same as that disclosed in Japanese Patent Publication No. 44903/1974 (Patent No. 5526) proposed by the present applicant.
No. 37) and Japanese Patent Publication No. 53-47767 (Patent No. 9).
65888). here,
FIG. 1 is a schematic explanatory diagram (schematic explanatory diagram of a continuous casting method) of a combination mold that can be suitably used in a method for manufacturing a composite roll for an iron making rolling facility having excellent wear resistance according to an embodiment of the present invention.
【０００９】まず、本発明の実施の形態に係る耐摩耗性
に優れた製鉄圧延設備用複合ロールの製造方法に好適に
使用できる組み合わせモールド１０は、図１に示すよう
に、電磁誘導加熱コイル１１が内部に配置された中空環
状の耐火枠１２を備えた耐火性加熱型１３と、耐火性加
熱型１３の下部に配置され、これと同軸の内孔を有する
冷却型１４とを有し、その下部には図示しない油圧シリ
ンダーなどの昇降手段によって上下し、上部に搭載され
たロールからなる製鉄圧延設備用複合ロール１５を徐々
に降下させる昇降装置１６を備えている。この組み合わ
せモールド１０を使用して、製鉄圧延設備用複合ロール
１５を製造する場合には、組み合わせモールド１０の中
央に中実又は、中空の母材１７を挿入する。次いで、別
途溶解炉１８にて準備した外層になる肉盛材の溶湯１９
を前記母材１７と組み合わせモールド１０との環状空隙
部２０に、電磁誘導加熱コイル１１に電流を流しながら
注入し、母材１７を断続的に降下させる。これによっ
て、溶湯１９は母材１７の表面に溶着しながら、前記冷
却型１４によって順次冷却凝固され肉盛層２１が形成さ
れる。この後、製品より少し大きい外径寸法に機械加工
し、次に所定の焼入れ、焼戻し等の熱処理を行い、更に
製品寸法への機械加工を行って製鉄圧延設備用複合ロー
ル１５が製造される。First, as shown in FIG. 1, a combination mold 10 suitable for use in a method for manufacturing a composite roll for an iron-making rolling facility having excellent wear resistance according to an embodiment of the present invention is shown in FIG. Has a refractory heating mold 13 having a hollow annular refractory frame 12 disposed therein, and a cooling mold 14 disposed below the refractory heating mold 13 and having an inner hole coaxial therewith. The lower part is provided with an elevating device 16 which moves up and down by elevating means such as a hydraulic cylinder (not shown) and gradually lowers a composite roll 15 for a steel mill which is a roll mounted on the upper part. When using the combination mold 10 to manufacture the composite roll 15 for an iron mill, a solid or hollow base material 17 is inserted into the center of the combination mold 10. Next, the molten metal 19 of the build-up material to be the outer layer prepared separately in the melting furnace 18.
Is injected into the annular gap 20 between the base material 17 and the mold 10 while applying a current to the electromagnetic induction heating coil 11 to lower the base material 17 intermittently. As a result, the molten metal 19 is sequentially cooled and solidified by the cooling mold 14 while being welded to the surface of the base material 17 to form the overlay 21. Thereafter, machining is performed to an outer diameter slightly larger than that of the product, and then heat treatment such as predetermined quenching and tempering is performed. Further, machining is performed to the product dimensions, and the composite roll 15 for steel mill is manufactured.
【００１０】この場合において、母材１７の外周に予め
ホウケイ酸ガラス皮膜２２を形成させておき、組み合わ
せモールド１０の上に配置された予熱用の電磁誘導加熱
コイル２３によって母材１７を予熱すると共に、ホウケ
イ酸ガラス皮膜２２が溶融焼成されることによって、母
材１７の表面を清浄に保ちながら肉盛層２１を形成でき
る。なお、図１において、２４は芯出し装置、２５は溶
融部、２６は溶融フラックスを示す。ここで、前記溶湯
１９の化学成分としては、〔Ｃ〕１〜３重量％、〔Ｓ
ｉ〕０．１〜１重量％、〔Ｍｎ〕０．１〜１重量％、
〔Ｃｒ〕４〜１５重量％、〔Ｍｏ〕４〜１５重量％、
〔Ｖ〕４〜１５重量％、〔Ｗ〕１０重量％以下、〔Ｃ
ｏ〕１０重量％以下、〔Ｎｉ〕５重量％以下、残部は実
質的にＦｅ及び不可避的不純物元素からなる原溶湯に、
注入の直前、即ち原溶湯が溶解炉１８にある時点におい
て、ミッシュメタル０．１〜２重量％を添加する。In this case, a borosilicate glass film 22 is formed on the outer periphery of the base material 17 in advance, and the base material 17 is preheated by an electromagnetic induction heating coil 23 for preheating arranged on the combination mold 10. When the borosilicate glass film 22 is melted and fired, the buildup layer 21 can be formed while keeping the surface of the base material 17 clean. In addition, in FIG. 1, 24 is a centering device, 25 is a fusion part, and 26 is a fusion flux. Here, the chemical components of the molten metal 19 are [C] 1 to 3% by weight, [S]
i] 0.1 to 1% by weight, [Mn] 0.1 to 1% by weight,
[Cr] 4 to 15% by weight, [Mo] 4 to 15% by weight,
[V] 4 to 15% by weight, [W] 10% by weight or less, [C
o] 10% by weight or less, [Ni] 5% by weight or less, with the balance being a raw molten metal substantially composed of Fe and unavoidable impurity elements,
Immediately before the injection, that is, at the time when the raw molten metal is in the melting furnace 18, 0.1 to 2% by weight of the misch metal is added.
【００１１】次に前記溶湯１９の化学成分を上記のよう
に限定した理由について説明する。 Ｃ：１〜３重量％ ＣはＣｒ、Ｍｏ、Ｗ、Ｖと、Ｍ23Ｃ6 、Ｍ2 Ｃ、ＭＣ型
の極めて硬い炭化物を形成し、耐摩耗性を向上させる。
また、基地に固溶し、焼き入れ性を向上させると共に、
基地の強度、硬さを向上させる。下限を１重量％とした
のは、炭化物が減少し耐摩耗性が低下するためであり、
また、上限を３重量％としたのは、ネット状の炭化物が
多くなり、靱性が低下するためである。 Ｓｉ：０．１〜１重量％ Ｓｉは脱酸剤として必要であるが、０．１重量％未満で
は効果がなく、１重量％を超えると、耐摩耗性が低下す
ることから、下限、上限をそれぞれ０．１重量％、１重
量％とした。特に、耐摩耗性を高めるためには０．５重
量％以下添加することが好ましい。Next, the reason why the chemical components of the molten metal 19 are limited as described above will be described. C: 1 to 3 wt% C is Cr, Mo, W, and V, M 23 C 6, M 2 C, to form a very hard carbides MC type, to improve the wear resistance.
In addition, it dissolves in the matrix to improve hardenability,
Improve the strength and hardness of the base. The lower limit is set to 1% by weight because carbides are reduced and wear resistance is reduced.
The upper limit is set to 3% by weight because the amount of net-like carbide increases and the toughness decreases. Si: 0.1 to 1% by weight Si is necessary as a deoxidizing agent, but if it is less than 0.1% by weight, it is ineffective, and if it exceeds 1% by weight, the wear resistance is reduced. Was 0.1% by weight and 1% by weight, respectively. In particular, in order to enhance wear resistance, it is preferable to add 0.5% by weight or less.
【００１２】Ｍｎ：０．１〜１重量％ Ｍｎは脱酸剤として働くほか、不純物として混入する有
害なＳをＭｎＳとして固定するが、０．１重量％未満で
は効果がなく、１重量％を超えると、耐摩耗性が低下す
ることから、下限を０．１重量％、上限を１重量％とし
た。特に、耐摩耗性を高めるためには０．５重量％以下
添加することが好ましい。 Ｃｒ：４〜１５重量％ Ｃｒは基地に固溶し、硬化性を高めると共に、耐摩耗
性、耐酸化性を向上させるのに必要であるが、４重量％
未満ではその効果が小さく、１５重量％を超えると耐焼
き付き性を低下させ、また粗大なＣｒ炭化物が生成する
ため、下限、上限をそれぞれ４重量％、１５重量％とし
た。特に、耐腐食性を高めるためには８重量％以上添加
することが好ましい。 Ｍｏ：４〜１５重量％ Ｍｏは一部基地に固溶し、焼戻し軟化抵抗を高め、ま
た、Ｃと結びついて耐摩耗性に有効なＭ2 Ｃ炭化物を形
成する。４重量％未満ではその効果が小さく、１５重量
％を超えるとＭ2 Ｃ炭化物が顕著に粗大化することか
ら、下限、上限をそれぞれ４重量％、１５重量％とし
た。Mn: 0.1 to 1% by weight Mn not only functions as a deoxidizing agent, but also fixes harmful S mixed as an impurity as MnS. If it exceeds, the wear resistance decreases, so the lower limit was set to 0.1% by weight and the upper limit was set to 1% by weight. In particular, in order to enhance wear resistance, it is preferable to add 0.5% by weight or less. Cr: 4 to 15% by weight Cr forms a solid solution in the matrix and is required to improve the hardenability and to improve the wear resistance and the oxidation resistance.
If it is less than 15% by weight, the effect is small, and if it exceeds 15% by weight, the seizure resistance is reduced, and coarse Cr carbides are formed. Therefore, the lower and upper limits are set to 4% by weight and 15% by weight, respectively. In particular, in order to enhance the corrosion resistance, it is preferable to add 8% by weight or more. Mo: 4 to 15% by weight Mo forms a solid solution in a part of the matrix, increases the tempering softening resistance, and combines with C to form an M 2 C carbide effective for abrasion resistance. If it is less than 4% by weight, the effect is small, and if it exceeds 15% by weight, the M 2 C carbides are remarkably coarsened. Therefore, the lower and upper limits are set to 4% by weight and 15% by weight, respectively.
【００１３】Ｖ：４〜１５重量％ Ｖは最も炭化物の形成傾向が大きくＭＣ炭化物を形成
し、４重量％未満ではＭＣの量が少なく、耐摩耗性が十
分得られず、またＭ2 Ｃ炭化物の粗大化を抑制すること
ができず、１５重量％を超えるとＭＣ炭化物が粗大化
し、機械的性質を低下せしめることから、下限を４重量
％、上限を１５重量％とした。特に、ＭＣ炭化物の効果
を高めるためには６重量％以上添加することが好まし
い。 Ｗ：１０重量％以下 Ｗは、Ｍｏと同じように、焼戻し軟化抵抗を高めると共
に、耐摩耗性に有効なＭ2 Ｃ炭化物を形成するが、１０
重量％を超えるとＭ2 Ｃ炭化物が粗大化することから、
上限を１０重量％とした。なお、本発明においてＷを全
く含まない場合も適用され、厳密にはＷは０又は０を超
え１０重量％以下の範囲で添加されることになる。ここ
で、Ｗを添加する場合には、多く添加するとコスト高と
なり、少ない場合にはその効果が少ないので、１〜７重
量％の範囲で添加するのが好ましい。V: 4 to 15% by weight V has the greatest tendency to form carbides and forms MC carbides. If less than 4% by weight, the amount of MC is small, wear resistance is not sufficiently obtained, and M 2 C carbides are not obtained. When the amount exceeds 15% by weight, the MC carbides become coarse and the mechanical properties deteriorate, so the lower limit was set to 4% by weight and the upper limit was set to 15% by weight. In particular, in order to enhance the effect of MC carbide, it is preferable to add 6% by weight or more. W: 10% by weight or less W, like Mo, increases the temper softening resistance and forms M 2 C carbide effective for abrasion resistance.
When the content exceeds% by weight, M 2 C carbides are coarsened.
The upper limit was 10% by weight. In the present invention, the case where W is not contained at all is also applied, and strictly speaking, W is added in a range of 0 or more than 0 and 10% by weight or less. Here, when W is added, if it is added in a large amount, the cost increases, and if it is small, the effect is small. Therefore, it is preferable to add W in the range of 1 to 7% by weight.
【００１４】Ｃｏ：１０重量％以下 Ｃｏは、大部分が基地に固溶し、基地強度を向上させ、
特に、高温でその効果が大きい。ＭＣ、Ｍ2 Ｃなどの極
めて硬く、耐摩耗性に有効な炭化物が存在する場合、基
地も炭化物にバランスした硬さ、強度がないと炭化物の
周囲の基地が極めて短時間で摩耗し肌荒れをもたらすの
で、炭化物に見合った基地の強度が必要となるためであ
る。また、Ｃｏは耐腐食性に極めて有効であり、上限を
１０重量％としたのは、それを超えて加えても効果が少
なく、また高価なためである。なお、本発明においてＣ
ｏを全く含まない場合も適用され、厳密にはＣｏは０又
は０を超え１０重量％以下の範囲で添加されることにな
る。ここで、Ｃｏを添加する場合には、多く添加すると
コスト高となり、少ない場合にはその効果が少ないの
で、１〜７重量％の範囲で添加するのが好ましい。Co: 10% by weight or less Co mostly forms a solid solution in the matrix to improve the matrix strength,
In particular, the effect is large at high temperatures. When carbides such as MC and M 2 C that are extremely hard and effective for abrasion resistance are present, the bases also have hardness and strength not balanced with the carbides. If there is no strength, the bases around the carbides are worn in a very short time, resulting in rough skin. Therefore, the strength of the base corresponding to the carbide is required. In addition, Co is extremely effective for corrosion resistance, and the upper limit is set to 10% by weight because adding more than that amount has little effect and is expensive. In the present invention, C
The case where o is not contained at all is also applied, and strictly speaking, Co is added in the range of 0 or more than 0 and 10% by weight or less. Here, when Co is added, if it is added in a large amount, the cost increases, and if it is small, the effect is small. Therefore, it is preferable to add Co in the range of 1 to 7% by weight.
【００１５】Ｎｉ：５重量％以下 Ｎｉは、大部分が基地に固溶し、基地の強度、硬さ、耐
腐食性及び材料の焼入れ性を向上させるが、５重量％を
超えると残留オーステナイトの増加をもたらし、割れや
肌荒れなどの問題が生じることがあり、上限を５重量％
とした。なお、本発明はＮｉを全く含まない場合も適用
され、厳密にはＮｉは０又は０を超え５重量％以下の範
囲で添加されることになる。Ni: not more than 5% by weight Ni largely dissolves in the matrix to improve the strength, hardness, corrosion resistance and hardenability of the matrix. It may cause problems such as cracks and rough skin, and the upper limit is 5% by weight.
And The present invention is also applied to a case where Ni is not contained at all, and strictly speaking, Ni is added in a range of 0 or more than 0 and 5% by weight or less.
【００１６】本発明の特徴は、上記各合金元素及び製造
方法を限定すると共に、上記化学成分を含有する多合金
の鉄基溶湯にミッシュメタルを外分で０．１〜２重量％
添加したことにある。連続鋳掛け法は、水冷モールドに
よる外表面からの急冷と、低温母材による内側からの抜
熱による急冷のため、速い冷却速度を持っていることが
大きな特徴である。冷却速度が速いことから、溶湯中の
ガスの浮上時間が不足し、溶湯中のガスが浮上しにく
く、凝固シェル内にピンホールやブローホールが生じや
すい。一方、上記化学成分の多合金材料は、高耐摩耗性
を得るため、Ｓｉ、Ｍｎの含有量を抑えている。Ｓｉ、
Ｍｎの含有量が低いことから、脱酸、脱ガスが不十分に
なりやすい。急冷凝固であるという特徴を有する連続鋳
掛けプロセスにおいて、このような脱酸、脱ガス不十分
な溶湯は注入の直前に、十分な脱酸、脱ガスを行う必要
がある。本発明者らは、上記製造条件の場合、脱酸、脱
ガスのために、ミッシュメタルを添加することが極めて
有効であることを見出した。つまり、急冷凝固の特徴を
持っている連続鋳掛け法と上記化学成分の多合金材料と
の組み合わせで、ミッシュメタルの添加による脱酸、脱
ガス処理は極めて重要である。また、ミッシュメタルの
添加は、脱酸、脱ガスによるピンホールとブローホール
の軽減又は防止の他に、脱硫の効果もあり、上記化学成
分の多合金材料の靱性を向上する。ミッシュメタルの添
加量は、後述の実施例からも明らかなように、０．１重
量％未満ではその効果が小さく、２重量％を超えると引
張強さが低下することから、下限、上限をそれぞれ０．
１重量％、２重量％とした。A feature of the present invention is that the above-mentioned alloy elements and the production method are limited, and the misch metal is added to the multi-alloy iron-based molten metal containing the above-mentioned chemical components in an amount of 0.1 to 2% by weight.
It has been added. The continuous casting method is characterized by having a high cooling rate due to rapid cooling from the outer surface by a water-cooled mold and rapid cooling by heat removal from the inside by a low-temperature base material. Since the cooling rate is high, the floating time of the gas in the molten metal is short, the gas in the molten metal is not easily raised, and pinholes and blowholes are easily generated in the solidified shell. On the other hand, in the polyalloy material having the above chemical components, the contents of Si and Mn are suppressed in order to obtain high wear resistance. Si,
Since the content of Mn is low, deoxidation and degassing tend to be insufficient. In a continuous casting process characterized by rapid solidification, such a deoxidized and degassed molten metal needs to be sufficiently deoxidized and degassed immediately before pouring. The present inventors have found that the addition of misch metal is extremely effective for deoxidation and degassing under the above production conditions. In other words, deoxidation and degassing by addition of misch metal is extremely important in a combination of a continuous casting method having a feature of rapid solidification and a polyalloy material having the above chemical components. The addition of the misch metal has the effect of desulfurization in addition to the reduction or prevention of pinholes and blowholes due to deoxidation and degassing, and improves the toughness of the polyalloy material having the above chemical components. As is clear from the examples described below, the effect of the misch metal is less than 0.1% by weight, and the effect is small, and if it exceeds 2% by weight, the tensile strength is reduced. 0.
It was 1% by weight and 2% by weight.
【００１７】[0017]
【実施例】以下に、更に本発明に係る耐摩耗性に優れた
製鉄圧延設備用複合ロール及びその製造方法の作用、効
果を確認するために行った実施例（以下、発明材とい
う）を、比較例（試験材又は比較材という）と共に説明
する。ここに、図２は連続鋳掛け法による発明材及び試
験材におけるピンホールとブローホールの面積率に及ぼ
すミッシュメタル添加量の影響を示すグラフ、図３は連
続鋳掛け法による発明材及び試験材の引張強さに及ぼす
ミッシュメタル添加量の影響を示すグラフ、図４は連続
鋳掛け法による発明材、試験材及び比較材の単位面積当
たり摩耗減量を示すグラフである。表１は連続鋳掛け法
による発明材、試験材及び比較材の化学成分及びミッシ
ュメタルの添加量を示す。これらの発明材、試験材及び
比較材は、いずれも所定の焼入れ、焼戻し処理を施した
後、外層材から、それぞれの試験片を切り出し、ピンホ
ールとブローホールの面積率の測定、引張試験及び摩耗
試験を行い、材料の特性を評価した。The following examples (hereinafter referred to as "invention materials") conducted to confirm the operation and effects of the composite roll for steel rolling equipment having excellent wear resistance according to the present invention and the method for producing the same are described below. A description will be given together with a comparative example (referred to as a test material or a comparative material). FIG. 2 is a graph showing the effect of the amount of added misch metal on the area ratio of pinholes and blowholes in the inventive material and the test material by the continuous casting method, and FIG. FIG. 4 is a graph showing the effect of the amount of misch metal added on the strength, and FIG. 4 is a graph showing the wear reduction per unit area of the inventive material, the test material and the comparative material by the continuous casting method. Table 1 shows the chemical components of the inventive material, the test material, and the comparative material and the amount of the misch metal added by the continuous casting method. Each of these inventive materials, test materials and comparative materials is subjected to a predetermined quenching and tempering treatment, and thereafter, each test piece is cut out from the outer layer material, and the area ratio of pinholes and blowholes is measured. A wear test was performed to evaluate the properties of the material.
【００１８】[0018]
【表１】 [Table 1]
【００１９】（ピンホールとブローホールの面積率の測
定結果）ＪＩＳＧ０５５５によって、発明材及び試験材
におけるピンホールとブローホールの面積率を測定し
た。図２はピンホールとブローホールの面積率に及ぼす
ミッシュメタル添加量の影響を示したもので、ミッシュ
メタルの添加量は０．１重量％未満の場合、ピンホール
とブローホールの面積率が高い。ミッシュメタル０．１
重量％以上を添加すれば、ピンホールとブローホールの
面積率が顕著に低くなり、著しい脱酸、脱ガス効果が認
められる。(Results of Measurement of Area Ratio of Pinholes and Blowholes) The area ratios of pinholes and blowholes in the invention materials and test materials were measured according to JIS G0555. FIG. 2 shows the effect of the amount of added misch metal on the area ratio of pinholes and blowholes. When the amount of misch metal added is less than 0.1% by weight, the area ratio of pinholes and blowholes is high. . Misch metal 0.1
Addition of not less than% by weight significantly reduces the area ratio of pinholes and blowholes, and remarkable deoxidation and degassing effects are observed.
【００２０】（引張試験結果）ＪＩＳＺ２２４１によっ
て、発明材及び試験材の引張強さを測定した。図３は引
張強さに及ぼすミッシュメタル添加量の影響を示し、ミ
ッシュメタルの添加量は０．１重量％未満の場合、引張
強さが低く、０．１〜２重量％の範囲で、引張強さが顕
著に向上し、２重量％を超えた場合は、引張強さが低下
する。(Results of Tensile Test) The tensile strength of the invention material and the test material was measured according to JISZ2241. FIG. 3 shows the effect of the amount of added misch metal on the tensile strength. When the amount of misch metal added is less than 0.1% by weight, the tensile strength is low. When the strength is remarkably improved and exceeds 2% by weight, the tensile strength decreases.
【００２１】（摩耗試験結果）摩耗試験は、１５０ｒｐ
ｍで回転する直径３０５ｍｍ、粒度＃２２０のエメリー
ペーパーに、９ｋｇｆの荷重で１０ｍｍ角のサンプルを
エメリーペーパーの中心より６０ｍｍの箇所に押し付
け、１０分後の摩耗減量を測定し、摩耗減量を試験面の
面積で除した値を求め、耐摩耗性を評価した。図４は摩
耗試験結果を示したもので、本発明材は試験材、比較材
に比べて、極めて優れた耐摩耗性を有していることがわ
かった。これらの試験結果から、本発明材は従来ロール
材に比較して、１．４倍以上の引張強さを有し、１．５
倍以上の極めて優れた耐摩耗性を有することが明らか
で、製鉄熱間又は冷間圧延設備用圧延ロール、矯正ロー
ルの耐久性を向上することができる。(Results of Wear Test) The wear test was performed at 150 rpm.
A sample of 10 mm square is pressed against a place of 60 mm from the center of the emery paper with a load of 9 kgf onto a 305 mm diameter, # 220 emery paper rotating at m. Was determined, and the abrasion resistance was evaluated. FIG. 4 shows the results of the abrasion test. It was found that the material of the present invention had extremely excellent wear resistance as compared with the test material and the comparative material. From these test results, the material of the present invention has a tensile strength of 1.4 times or more as compared with the conventional roll material,
It is evident that the steel has extremely excellent abrasion resistance by a factor of two or more, and the durability of the rolling roll and the straightening roll for hot or cold rolling equipment for steelmaking can be improved.
【００２２】[0022]
【発明の効果】請求項１記載の耐摩耗性に優れた製鉄圧
延設備用複合ロール、及び請求項２、３記載の耐摩耗性
に優れた製鉄圧延設備用複合ロールの製造方法において
は、ミッシュメタル０．１〜２重量％を所定の化学成分
を含有する溶湯に添加することによって、ピンホールと
ブローホールの面積率が極めて低くなり、引張強さが顕
著に増大し、耐摩耗性も顕著に向上した。従って、この
耐摩耗性に優れた製鉄圧延設備用複合ロールを製鉄熱間
又は冷間圧延設備圧延ロール、矯正ロールに適用するこ
とによって、その寿命を顕著に向上することができる。According to the first aspect of the present invention, there is provided a composite roll for an iron-making rolling facility having excellent wear resistance and a method for producing a composite roll having a high abrasion resistance according to the second aspect. By adding 0.1 to 2% by weight of metal to a molten metal containing a predetermined chemical component, the area ratio of pinholes and blowholes becomes extremely low, the tensile strength is remarkably increased, and the wear resistance is also remarkable. Improved. Therefore, by applying the composite roll for iron-rolling equipment having excellent abrasion resistance to a hot or cold-rolling equipment rolling roll and a straightening roll, the life thereof can be remarkably improved.
【図１】本発明の一実施の形態に係る耐摩耗性に優れた
製鉄圧延設備用複合ロールの製造方法に好適に使用でき
る組み合わせモールドの概略説明図である。FIG. 1 is a schematic explanatory view of a combination mold that can be suitably used in a method of manufacturing a composite roll for an iron-making rolling facility having excellent wear resistance according to an embodiment of the present invention.
【図２】発明材及び試験材におけるピンホールとブロー
ホールの面積率に及ぼすミッシュメタル添加量の影響を
示すグラフである。FIG. 2 is a graph showing the effect of the amount of added misch metal on the area ratio of pinholes and blowholes in the inventive material and the test material.
【図３】発明材及び試験材の引張強さに及ぼすミッシュ
メタル添加量の影響を示すグラフである。FIG. 3 is a graph showing the effect of the amount of misch metal added on the tensile strength of the inventive material and the test material.
【図４】発明材、試験材及び比較材の単位面積当たり摩
耗減量を示すグラフである。FIG. 4 is a graph showing the reduction in wear per unit area of the inventive material, the test material, and the comparative material.
１０ 組み合わせモールド １１ 電磁誘導
加熱コイル １２ 耐火枠 １３ 耐火性加
熱型 １４ 冷却型 １５ 製鉄圧延
設備用複合ロール １６ 昇降装置 １７ 母材 １８ 溶解炉 １９ 溶湯 ２０ 環状空隙部 ２１ 肉盛層 ２２ ホウケイ酸ガラス皮膜 ２３ 予熱用の
電磁誘導加熱コイル ２４ 芯出し装置 ２５ 溶融部 ２６ 溶融フラックスREFERENCE SIGNS LIST 10 Combination mold 11 Electromagnetic induction heating coil 12 Fireproof frame 13 Fireproof heating type 14 Cooling type 15 Composite roll for steel mill 16 Lifting device 17 Base material 18 Melting furnace 19 Molten metal 20 Annular gap 21 Overlay layer 22 Borosilicate glass coating 23 Electromagnetic induction heating coil for preheating 24 Centering device 25 Melting part 26 Melting flux
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ２２Ｃ 38/00 ３０２ Ｃ２２Ｃ 38/00 ３０２Ｅ 38/52 38/52 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI C22C 38/00 302 C22C 38/00 302E 38/52 38/52
Claims (3)
型の下部に、冷却型を一体的に配置した組み合わせモー
ルドを用い、該組み合わせモールドの内部に鋼を素材と
する中実又は中空の母材を同心垂直に挿入し、該母材の
外周の環状空隙部に、別途準備した溶湯を注入し、前記
母材を断続的に降下させて、該母材外表面に前記溶湯を
溶着させながら、冷却により凝固せしめて、該母材の外
周に肉盛層を形成し、所定の熱処理、機械加工を行なっ
て製造される製鉄圧延設備用複合ロールであって、 前記溶湯の成分は、〔Ｃ〕１〜３重量％、〔Ｓｉ〕０．
１〜１重量％、〔Ｍｎ〕０．１〜１重量％、〔Ｃｒ〕４
〜１５重量％、〔Ｍｏ〕４〜１５重量％、〔Ｖ〕４〜１
５重量％、〔Ｗ〕１０重量％以下、〔Ｃｏ〕１０重量％
以下、〔Ｎｉ〕５重量％以下、残部は実質的にＦｅ及び
不可避的不純物元素からなる原溶湯に、外分でミッシュ
メタル０．１〜２重量％を添加したものからなることを
特徴とする耐摩耗性に優れた製鉄圧延設備用複合ロー
ル。1. A solid or hollow mother made of steel inside a combination mold in which a cooling mold is integrally disposed below a refractory heating mold provided with an electromagnetic induction heating coil. Insert the material concentrically and vertically, inject the separately prepared molten metal into the annular gap around the outer circumference of the base material, lower the base material intermittently, and weld the molten metal to the outer surface of the base material. A composite roll for an iron-rolling equipment manufactured by solidifying by cooling to form a build-up layer on the outer periphery of the base material and performing predetermined heat treatment and machining, wherein the component of the molten metal is [C 1 to 3% by weight, [Si] 0.
1-1% by weight, [Mn] 0.1-1% by weight, [Cr] 4
-15% by weight, [Mo] 4-15% by weight, [V] 4-1
5% by weight, [W] 10% by weight or less, [Co] 10% by weight
Hereinafter, [Ni] is 5% by weight or less, and the balance is a raw molten metal substantially composed of Fe and unavoidable impurity elements, to which 0.1 to 2% by weight of a misch metal is added as an external component. Composite roll for steel mills with excellent wear resistance.
型の下部に、冷却型を一体的に配置した組み合わせモー
ルドを用い、該組み合わせモールドの内部に鋼を素材と
する中実又は、中空の母材を同心垂直に挿入し、同母材
の外周の環状空隙部に、別途、準備したＳｉ及びＭｎ成
分の低い耐摩耗性を有する多合金材料からなる原溶湯
に、外分でミッシュメタル０．１〜２重量％を添加した
溶湯を注入し、前記母材を断続的に降下させて、該母材
外表面に溶湯を溶着させながら、冷却により凝固せしめ
て、該母材の外周に肉盛層を形成し、所定の熱処理、機
械加工を行って製造することを特徴とする耐摩耗性に優
れた製鉄圧延設備用複合ロールの製造方法。2. A combination mold in which a cooling mold is integrally disposed below a refractory heating mold provided with an electromagnetic induction heating coil, and a solid or hollow member made of steel is used inside the combination mold. The base metal is inserted vertically and concentrically, and into the annular space around the circumference of the base material, a separately prepared raw metal made of a multi-alloy material having low abrasion resistance with low Si and Mn components is added. .1 to 2% by weight is poured, the base material is intermittently lowered, and solidified by cooling while the melt is being welded to the outer surface of the base material. A method for producing a composite roll for an iron-rolling equipment having excellent wear resistance, wherein the composite roll is produced by forming a fill layer and performing predetermined heat treatment and machining.
％、〔Ｓｉ〕０．１〜１重量％、〔Ｍｎ〕０．１〜１重
量％、〔Ｃｒ〕４〜１５重量％、〔Ｍｏ〕４〜１５重量
％、〔Ｖ〕４〜１５重量％、〔Ｗ〕１０重量％以下、
〔Ｃｏ〕１０重量％以下、〔Ｎｉ〕５重量％以下、残部
は実質的にＦｅ及び不可避的不純物元素からなることを
特徴とする請求項２記載の耐摩耗性に優れた製鉄圧延設
備用複合ロールの製造方法。3. The components of the raw molten metal are [C] 1 to 3% by weight, [Si] 0.1 to 1% by weight, [Mn] 0.1 to 1% by weight, and [Cr] 4 to 15% by weight. %, [Mo] 4 to 15% by weight, [V] 4 to 15% by weight, [W] 10% by weight or less,
3. The composite for an iron-rolling equipment having excellent wear resistance according to claim 2, wherein [Co] is 10% by weight or less, [Ni] is 5% by weight or less, and the balance substantially consists of Fe and unavoidable impurity elements. Roll manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08224897A JP3679221B2 (en) | 1997-03-14 | 1997-03-14 | Composite roll for iron making rolling mill with excellent wear resistance and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08224897A JP3679221B2 (en) | 1997-03-14 | 1997-03-14 | Composite roll for iron making rolling mill with excellent wear resistance and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10258337A true JPH10258337A (en) | 1998-09-29 |
| JP3679221B2 JP3679221B2 (en) | 2005-08-03 |
Family
ID=13769140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08224897A Expired - Lifetime JP3679221B2 (en) | 1997-03-14 | 1997-03-14 | Composite roll for iron making rolling mill with excellent wear resistance and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3679221B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100530043B1 (en) * | 2000-12-12 | 2005-11-22 | 주식회사 포스코 | Mill roll and method for manufacturing the roll |
| CN114603117A (en) * | 2022-03-24 | 2022-06-10 | 北京市金合益科技发展有限公司 | Coaxial core fixing system and continuous casting coating production line |
-
1997
- 1997-03-14 JP JP08224897A patent/JP3679221B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100530043B1 (en) * | 2000-12-12 | 2005-11-22 | 주식회사 포스코 | Mill roll and method for manufacturing the roll |
| CN114603117A (en) * | 2022-03-24 | 2022-06-10 | 北京市金合益科技发展有限公司 | Coaxial core fixing system and continuous casting coating production line |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3679221B2 (en) | 2005-08-03 |
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