JPH0741373B2 - Mold for continuous casting - Google Patents
Mold for continuous castingInfo
- Publication number
- JPH0741373B2 JPH0741373B2 JP35081891A JP35081891A JPH0741373B2 JP H0741373 B2 JPH0741373 B2 JP H0741373B2 JP 35081891 A JP35081891 A JP 35081891A JP 35081891 A JP35081891 A JP 35081891A JP H0741373 B2 JPH0741373 B2 JP H0741373B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- continuous casting
- weight
- hardness
- alloy
- 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.)
- Expired - Fee Related
Links
- 238000009749 continuous casting Methods 0.000 title claims description 7
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 14
- 239000011247 coating layer Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 238000004070 electrodeposition Methods 0.000 description 4
- 229910017112 Fe—C Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 229910003271 Ni-Fe Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005323 electroforming Methods 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000001242 enediol group Chemical group 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は耐摩耗性皮膜を表面に有
する連続鋳造用鋳型に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous casting mold having a wear resistant coating on its surface.
【０００２】[0002]
【従来の技術】連続鋳造用鋳型は熱伝導性と共に表面の
耐摩耗性が要求される。従来から鋳型表面の耐摩耗性皮
膜として用いられているＮｉ−Ｆｅ合金等のＮｉ基合金
はＮｉ電鋳と比べると硬さは高い（Ｈｖ３００〜５０
０）が、延性が低く（５％以下）、鋳型の高温環境や繰
り返しのヒートサイクルにより割れが発生し易かった。2. Description of the Related Art A continuous casting mold is required to have thermal conductivity as well as surface abrasion resistance. Ni-based alloys such as Ni-Fe alloys that have been conventionally used as wear-resistant coatings on the surface of molds have higher hardness (Hv 300-50) than Ni electroforming.
0), the ductility was low (5% or less), and cracking was likely to occur due to the high temperature environment of the mold and repeated heat cycles.
【０００３】そのため、使用部位としては熱負荷のかか
らない最下部へ、厚みとしては薄肉（１mm以下）での限
定された施工しか出来なかった。特に２mm以上の厚さに
なると、熱影響により皮膜表面に割れが短期間で発生
し、安定的な連鋳操業ができないという問題があった。
しかし、耐摩耗性を考えたときには、皮膜の硬さはより
硬い方が望ましく、硬い程長寿命化には効果があるとい
う点は知られている。For this reason, it is possible to carry out only limited construction with a thin portion (1 mm or less) as the use site to the lowermost portion where no heat load is applied. In particular, when the thickness is 2 mm or more, there is a problem that cracks occur on the coating surface in a short period of time due to the influence of heat and stable continuous casting operation cannot be performed.
However, in consideration of wear resistance, it is known that the hardness of the coating is preferably harder, and the harder it is, the longer the life is effective.
【０００４】[0004]
【発明が解決しようとする課題】解決しようとする問題
点は、従来のＮｉ−Ｆｅで代表されるＮｉ基合金が延性
不足のために割れが発生し易いという点である。The problem to be solved is that conventional Ni-based alloys represented by Ni-Fe are apt to crack due to insufficient ductility.
【０００５】[0005]
【課題を解決するための手段】本発明は、銅若しくは銅
合金製鋳型本体の内表面上に、Ｆｅ１〜１５重量％，Ｃ
０．１重量％以下，残部ＮｉなるＮｉ合金層を施してな
る連続鋳造用鋳型を主要な特徴としている。このＮｉ合
金層は上方から下方にかけて順次勾配状に肉厚する場合
や、また該Ｎｉ合金層を施す前に鋳型本体の内表面の略
下半部にＮｉ電鋳を施し、該Ｎｉ電鋳表面の略下半部に
このＮｉ合金層を施す場合もある。According to the present invention, 1 to 15% by weight of Fe and C are contained on the inner surface of a copper or copper alloy mold body.
The main feature of the casting mold is a continuous casting mold having a Ni alloy layer of 0.1% by weight or less and the balance being Ni. When this Ni alloy layer gradually increases in thickness from the upper side to the lower side, or before the Ni alloy layer is applied, Ni electroforming is applied to the substantially lower half of the inner surface of the mold body, and the Ni electroformed surface is In some cases, the Ni alloy layer may be applied to the substantially lower half of the above.
【０００６】次に上記Ｎｉ合金層の組成範囲について述
べると、Ｆｅは皮膜層の硬さを上げ耐摩耗性を増す元素
であるが１重量％未満ではその効果が顕著ではなく、逆
に１５重量％を越えると延性が不足し割れが発生し易く
なるので１〜１５重量％とした。Ｃは電気化学的析出方
法を利用した場合、Ｎｉ合金においては微量の添加で皮
膜層の硬さの上限を上げると共に延性をも改善する元素
であるが０．００３重量％未満ではその効果が顕著でな
いことが判明した。しかし０．１重量％を越えると逆に
皮膜層が脆くなるので０．１重量％以下とした。Next, regarding the composition range of the Ni alloy layer, Fe is an element that increases the hardness of the coating layer and increases wear resistance, but if it is less than 1% by weight, its effect is not remarkable, and conversely 15% by weight. %, The ductility becomes insufficient and cracking is likely to occur, so the content was made 1 to 15% by weight. When an electrochemical deposition method is used, C is an element that increases the upper limit of the hardness of the coating layer and also improves the ductility in a Ni alloy by adding a trace amount, but if it is less than 0.003% by weight, the effect is remarkable. Turned out not to be. However, if it exceeds 0.1% by weight, the coating layer becomes brittle, so the content is set to 0.1% by weight or less.
【０００７】[0007]
【作用】本発明では鋳型本体表面に形成されている皮膜
層であるＮｉ−Ｆｅ−Ｃ合金層が十分な耐摩耗性を有す
ると共に延性をも有しているため高温環境や繰り返しの
ヒートサイクルによっても十分な耐久性を発現出来るも
のである。In the present invention, since the Ni-Fe-C alloy layer, which is the coating layer formed on the surface of the mold body, has sufficient wear resistance and also has ductility, it may be exposed to a high temperature environment or repeated heat cycles. Is also capable of exhibiting sufficient durability.
【０００８】[0008]
【実施例】図１は、本発明鋳型の１実施例の断面図であ
って、鋳型本体１の内表面にその上部は肉厚０．５mmで
その下部は肉厚２mmとなるべく勾配状にＮｉ−Ｆｅ−Ｃ
よりなるＮｉ合金層２を電着したものである。この時の
電着条件は、 金属Ｎｉ ７０〜１１０ｇ／
ｌ エンジオール基を有する有機化合物 ５ｇ／ｌ以下 ホウ酸 ３０〜４０ｇ／ｌ Ｆｅ2+ ５ｇ／ｌ以下 ｐＨ ３．５〜４．５ 温度 ４５〜５５℃ 電流密度 １〜５Ａ／ｄｍ2 であった。この様にして得られたＮｉ合金層２の硬さは
Ｈｖ３００〜６００で、１／２インチ径マンドレルによ
る折り曲げ試験でも割れの発生はなかった。FIG. 1 is a cross-sectional view of one embodiment of the mold of the present invention, in which the upper part of the inner surface of the mold body 1 has a thickness of 0.5 mm and the lower part has a thickness of 2 mm. -Fe-C
The Ni alloy layer 2 is formed by electrodeposition. The electrodeposition conditions at this time are as follows: Metallic Ni 70 to 110 g /
1 Organic compound having an enediol group 5 g / l or less Boric acid 30-40 g / l Fe 2+ 5 g / l or less pH 3.5-4.5 Temperature 45-55 ° C. Current density 1-5 A / dm 2 . The hardness of the Ni alloy layer 2 thus obtained was Hv 300 to 600, and no crack was generated even in the bending test using the 1/2 inch diameter mandrel.
【０００９】図２は、本発明鋳型の他の実施例の断面図
であって、鋳型本体１の内表面の略下半部に厚さ２mmの
Ｎｉ電鋳層３を施し、該Ｎｉ電鋳層３表面の略下半部に
厚さ１．０mmのＮｉ−Ｆｅ−ＣよりなるＮｉ合金層２を
上記実施例と同様の電着条件で電着した。この様にして
得られたＮｉ合金層２の硬さはＨｖ３００〜６００以上
であり、１／２インチ径マンドレルによる折り曲げ試験
でも割れの発生はなかった。なお比較のために従来のＮ
ｉ−Ｆｅ合金について１／２インチ径マンドレルによる
折り曲げ試験を行った結果Ｈｖ４５０で割れが発生し
た。FIG. 2 is a cross-sectional view of another embodiment of the mold of the present invention, in which a Ni electroformed layer 3 having a thickness of 2 mm is applied to the lower half of the inner surface of the mold body 1, The Ni alloy layer 2 made of Ni-Fe-C having a thickness of 1.0 mm was electrodeposited on the lower half of the surface of the layer 3 under the same electrodeposition conditions as in the above-mentioned Examples. The hardness of the Ni alloy layer 2 thus obtained was Hv 300 to 600 or higher, and no crack was generated even in the bending test using the 1/2 inch diameter mandrel. For comparison, the conventional N
The i-Fe alloy was subjected to a bending test using a 1/2 inch diameter mandrel, and as a result, cracking occurred at Hv450.
【００１０】[0010]
【発明の効果】以上説明した様に本発明の連続鋳造用鋳
型は、従来のＮｉ基合金を皮膜層とする鋳型に比べ、皮
膜層の延性を改善したため、鋳型の苛酷な使用条件下に
おいても割れが発生し難くなった。従って皮膜層の施工
部位は、これまでの鋳型最下部からさらに上方部へ、電
鋳厚については１mm以上の施工が出来それだけ鋳型の耐
久性が向上する。また皮膜層の硬さはＦｅ濃度管理によ
り任意に調整可能なため硬さの施工範囲が広がり、特に
Ｈｖ＞５００の高硬度品においては耐摩耗性が良くな
る。As described above, the continuous casting mold of the present invention has improved ductility of the coating layer as compared with the conventional mold having a Ni-based alloy as the coating layer, so that the mold can be used even under severe conditions of use of the mold. Cracks are less likely to occur. Therefore, the coating layer can be applied from the lowermost part of the mold to the upper part, and the electroformed thickness of 1 mm or more can be applied, and the durability of the mold is improved accordingly. Further, since the hardness of the coating layer can be arbitrarily adjusted by controlling the Fe concentration, the range of hardness application is widened, and especially in the case of a high hardness product with Hv> 500, the wear resistance is improved.
【図１】本発明の１実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図２】本発明の他の実施例を示す断面図である。FIG. 2 is a sectional view showing another embodiment of the present invention.
１ 鋳型本体 ２ Ｎｉ合金層 ３ Ｎｉ電鋳層 1 Mold body 2 Ni alloy layer 3 Ni electroformed layer
フロントページの続き (56)参考文献 特開 昭58−135748（ＪＰ，Ａ) 実開 平１−38138（ＪＰ，Ｕ)Continuation of the front page (56) References JP-A-58-135748 (JP, A) Actual Kaihei 1-38138 (JP, U)
Claims (1)
に、Ｆｅ１〜１５重量％，Ｃ０．００３〜０．１重量
％，残部ＮｉからなるＮｉ合金層を施してなる連続鋳造
用鋳型。1. A continuous casting mold comprising a copper or copper alloy mold main body on which an Ni alloy layer consisting of 1 to 15% by weight of Fe, 0.003 to 0.1% by weight of C, and the balance of Ni is applied on the inner surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35081891A JPH0741373B2 (en) | 1991-12-10 | 1991-12-10 | Mold for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35081891A JPH0741373B2 (en) | 1991-12-10 | 1991-12-10 | Mold for continuous casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06126389A JPH06126389A (en) | 1994-05-10 |
| JPH0741373B2 true JPH0741373B2 (en) | 1995-05-10 |
Family
ID=18413091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35081891A Expired - Fee Related JPH0741373B2 (en) | 1991-12-10 | 1991-12-10 | Mold for continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0741373B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0774525B1 (en) * | 1995-11-17 | 2000-02-23 | Ngk Insulators, Ltd. | Copper alloy mold for casting aluminium or aluminium alloy |
| US20050016710A1 (en) * | 2003-07-25 | 2005-01-27 | Spx Corporation | Chill blocks and methods for manufacturing chill blocks |
-
1991
- 1991-12-10 JP JP35081891A patent/JPH0741373B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06126389A (en) | 1994-05-10 |
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