JPH0530886B2 - - Google Patents
Info
- Publication number
- JPH0530886B2 JPH0530886B2 JP63316438A JP31643888A JPH0530886B2 JP H0530886 B2 JPH0530886 B2 JP H0530886B2 JP 63316438 A JP63316438 A JP 63316438A JP 31643888 A JP31643888 A JP 31643888A JP H0530886 B2 JPH0530886 B2 JP H0530886B2
- Authority
- JP
- Japan
- Prior art keywords
- roll
- temperature
- heat
- thermal conductivity
- metal
- 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 - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/562—Details
- C21D9/563—Rolls; Drums; Roll arrangements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、金属薄板の連続熱処理用ハースロー
ルに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a hearth roll for continuous heat treatment of thin metal sheets.
［従来の技術］
金属薄板の連続熱処理炉では、多数のハースロ
ールにより鋼板を保持すると同時に、搬送を行
い、連続で加熱、冷却などの熱処理を行う。この
様な熱処理炉のハースロールは、加熱帯において
は鋼板接触部では鋼板に抜熱され、非接触部では
雰囲気で加熱されてロール軸方向に温度差が生ず
る。一方、冷却帯においては鋼板接触部では鋼板
により加熱され、非接触部では雰囲気で冷却され
て軸方向に温度差が生ずる。特に鋼板エツジ部に
接触する部分では温度勾配が大きい。この状態
で、通板材幅を拡大する際、制限量の幅に広げる
と、鋼板のエツジ部は温度勾配の大きいハースロ
ール端部に接触する事になり、部分的に熱膨張量
の差が生じ、座屈が発生しやすい。また、通板時
に鋼板が炉内で蛇行を起し、これが大きくなる
と、炉壁に接触する問題がある。これを防ぐため
ハースロールには適正なクラウン量を与える事で
安定通板を実現している。しかし、ハースロール
に部分的な温度差が有ると、熱膨張量の差から適
正クラウン量が維持出来ず蛇行が発生する。[Prior Art] In a continuous heat treatment furnace for thin metal sheets, the steel sheet is held and transported by a large number of hearth rolls, and is continuously subjected to heat treatment such as heating and cooling. In the hearth roll of such a heat treatment furnace, in the heating zone, heat is removed from the steel plate at the steel plate contact area, and the non-contact area is heated in the atmosphere, creating a temperature difference in the roll axis direction. On the other hand, in the cooling zone, the steel plate contact portion is heated by the steel plate, and the non-contact portion is cooled by the atmosphere, creating a temperature difference in the axial direction. In particular, the temperature gradient is large in the area that contacts the edge of the steel plate. In this state, when expanding the width of the sheet material to the limited width, the edge of the steel sheet will come into contact with the end of the hearth roll where the temperature gradient is large, causing a difference in the amount of thermal expansion locally. , buckling is likely to occur. Furthermore, when the steel sheet is threaded, it meanders in the furnace, and if this meandering becomes large, there is a problem that it comes into contact with the furnace wall. To prevent this, stable sheet threading is achieved by giving the hearth roll an appropriate amount of crown. However, if there is a local temperature difference in the hearth roll, an appropriate amount of crown cannot be maintained due to the difference in the amount of thermal expansion, and meandering occurs.
このような問題を解決するために、特公昭63−
38409号ではハースロール内に粉粒体を封入し、
これを撹拌する事で熱移動を行い、ロール温度を
均一化している。又、特開昭57−137431号ではハ
ースロール内を幅方向に分割し、その中に温度制
限した流体を供給して、加熱又は冷却を行い温度
の均一化を計つている。更には、特開昭61−
147819に見られる様に、ハースロール内部に溶融
塩あるいは溶融金属を封入して軸方向の温度差を
小さくする事が提案されている。 In order to solve such problems, the special public
In No. 38409, powder and granules are enclosed in a hearth roll,
By stirring this, heat is transferred and the roll temperature is made uniform. Further, in Japanese Patent Application Laid-Open No. 57-137431, the inside of the hearth roll is divided in the width direction, and a temperature-limited fluid is supplied therein to perform heating or cooling to make the temperature uniform. Furthermore, JP-A-61-
147819, it has been proposed to reduce the temperature difference in the axial direction by enclosing molten salt or molten metal inside the hearth roll.
［発明が解決しようとする課題］
ハースロールの軸方向温度分布は通板材の幅に
応じて変化するので、温度調整機構を付加する場
合、部分的に温度調節をする必要が有る。前記従
来技術に見られる、粉体を封入する方法（特公昭
63−38409）では、粉体を撹拌する機構が必要に
なつて構造が複雑になり、さらにこれを動かす動
力が必要である。又は、温度コントロールした流
体を供給する場合（特開昭57−137431）では、流
体の温度制御装置が必要であり、ロール内に分割
した流路を設けるため構造が複雑で設備費も多く
なる。[Problems to be Solved by the Invention] Since the axial temperature distribution of the hearth roll changes depending on the width of the threaded material, when a temperature adjustment mechanism is added, it is necessary to partially adjust the temperature. The method of encapsulating powder seen in the above-mentioned prior art (Tokuko Showa)
63-38409) requires a mechanism to stir the powder, making the structure complicated, and also requires power to move it. Alternatively, in the case of supplying a temperature-controlled fluid (Japanese Patent Laid-Open No. 57-137431), a fluid temperature control device is required, and the structure is complicated and the equipment cost increases because divided flow paths are provided in the roll.
また、ハースロール内部に溶融塩や溶融金属を
封入する場合（特開昭61−147819）は、これらの
流体が外部に漏出しないようにロール構造を強固
なものにする必要があり、また溶融流体はロール
下部のみでロール内面に接するため均温効果が低
く、その効果を上げるために溶融流体の封入量を
増加すると、ロールの重量が増加し駆動系の強化
が必要になる。 Furthermore, when sealing molten salt or molten metal inside the hearth roll (Japanese Unexamined Patent Publication No. 61-147819), it is necessary to make the roll structure strong so that these fluids do not leak outside. Since only the lower part of the roll contacts the inner surface of the roll, the temperature-uniforming effect is low, and if the amount of molten fluid enclosed is increased to improve this effect, the weight of the roll will increase and the drive system will need to be strengthened.
本発明は金属薄板の連続熱処理用ハースロール
で特別な調整機構や加熱冷却設備を付加せず、ロ
ール内壁の構造を工夫した事でロールの軸方向温
度を均一化し、通板材幅変更量の制約の緩和と適
正ロールクラウンの維持を実現することを目的と
するものである。 The present invention is a hearth roll for continuous heat treatment of thin metal sheets, which does not require any special adjustment mechanism or heating/cooling equipment, and the structure of the inner wall of the roll has been devised to equalize the temperature in the axial direction of the roll, thereby limiting the amount of change in the width of the threaded material. The purpose is to alleviate this and maintain an appropriate roll crown.
［課題を解決するための手段］
即ち、本発明は、
１ 耐熱鋼からなる中空ロールの内周面に熱伝導
率の大きな金属を層状に設けたことを特徴とす
る金属薄板の連続熱処理用ハースロール、
２ 耐熱鋼からなる中空ロールの内周面に熱伝導
率の大きな金属を被熱処理材のエツジが通過す
る範囲をカバーするよう層状に設けたことを特
徴とする金属薄板の連続熱処理用ハースロー
ル、
３ 熱伝導率の大きな金属は銅、銅合金、金、銀
のうちの１種又は２種以上である上記１又は２
項記載のハースロール、
を要旨とするものである。[Means for Solving the Problems] That is, the present invention provides: 1. A hearth for continuous heat treatment of thin metal sheets, characterized in that a metal with high thermal conductivity is provided in layers on the inner peripheral surface of a hollow roll made of heat-resistant steel. 2. A hearth for continuous heat treatment of thin metal sheets, characterized in that a metal with high thermal conductivity is provided in layers on the inner peripheral surface of a hollow roll made of heat-resistant steel so as to cover the range through which the edges of the heat-treated material pass. Roll, 3. 1 or 2 above, wherein the metal with high thermal conductivity is one or more of copper, copper alloy, gold, and silver.
The gist of the hearth roll is as described in Section 1.
［作用］
中空ロール外周面を耐熱鋼とするとともにその
内周面をそれより熱伝導率の大きな金属で構成す
る事で、耐熱鋼のみの場合に比較して、該ロール
軸方向の熱伝導性が良くなり、熱移動量が増加
し、高温部側の熱が速やかに低温部側へ移動して
温度勾配が小さくなる。特に鋼材（被熱処理材）
のエツジ部近傍の温度勾配が小さくなる事によ
り、鋼材幅を広げた場合、幅拡張部の板温度勾配
も小さくなり、エツジ部の座屈の防止出来る。ま
た温度均一化によりロール各部の熱膨張量の差も
小さくなり、初期ロールクラウンを維持出来る事
になり、鋼板の蛇行を防止出来る。[Function] The outer peripheral surface of the hollow roll is made of heat-resistant steel, and the inner peripheral surface is made of a metal with higher thermal conductivity than that of heat-resistant steel, which improves the thermal conductivity in the axial direction of the roll compared to the case of only heat-resistant steel. This improves the amount of heat transfer, and the heat from the high-temperature side quickly moves to the low-temperature side, reducing the temperature gradient. Especially steel materials (materials to be heat treated)
By reducing the temperature gradient near the edge of the steel material, when the width of the steel material is widened, the temperature gradient of the plate at the widened portion also becomes smaller, and buckling of the edge can be prevented. Furthermore, by making the temperature uniform, the difference in the amount of thermal expansion of each part of the roll becomes smaller, so that the initial roll crown can be maintained, and meandering of the steel plate can be prevented.
［発明の実施態様］ 以下図面に基づいて本発明を説明する。[Embodiments of the invention] The present invention will be explained below based on the drawings.
第１図は本発明の実施例を示す断面図であり、
第２図及び第３図は本発明の他の実施例を示す断
面図である。 FIG. 1 is a sectional view showing an embodiment of the present invention,
FIGS. 2 and 3 are cross-sectional views showing other embodiments of the present invention.
本発明は、第１図に示すように、耐熱鋼１から
なる中空ロール３の内周面に、熱伝導率の大きな
金属２、例えば銅を層状に設けたものである。 In the present invention, as shown in FIG. 1, a metal 2 having high thermal conductivity, such as copper, is provided in a layer on the inner peripheral surface of a hollow roll 3 made of heat-resistant steel 1.
また、第２図は耐熱鋼１からなる中空ロール３
の内周面に銅の如き熱伝導率の大きな金属２を層
状に設けた後に、その内周に耐熱鋼１を更に層状
に設けたもので、銅をロール全長にわたりサンド
イツチ状に形成している。 In addition, FIG. 2 shows a hollow roll 3 made of heat-resistant steel 1.
After a metal 2 with high thermal conductivity such as copper is provided in a layer on the inner peripheral surface of the roll, a heat-resistant steel 1 is further provided in a layer on the inner periphery of the roll, and the copper is formed in a sandwich-like pattern over the entire length of the roll. .
第３図は本発明に係る熱伝導率の大きな金属２
を、被熱処理材の板幅が変化する範囲を十分カバ
ーするように、中空ロール３の軸長方向中央部を
除いた左右両側内周面に２Ａ及び２Ｂで示すよう
に設けたものである。一般に、被熱処理材と常時
接触しているロール中央部は温度変化が小さく、
軸長方向左右両側は被熱処理材の板幅変更により
温度変化が大きいので、この温度変化の大きい部
位に本発明に係る熱伝導率の大きな金属を設けて
いる。 Figure 3 shows metal 2 with high thermal conductivity according to the present invention.
are provided as shown at 2A and 2B on the inner circumferential surface of the hollow roll 3 on both the left and right sides excluding the central part in the axial direction so as to sufficiently cover the range in which the width of the material to be heat treated changes. Generally, temperature changes are small in the center of the roll, which is in constant contact with the material to be heat treated.
Since there is a large temperature change on both the left and right sides in the axial direction due to the change in the plate width of the material to be heat treated, the metal with high thermal conductivity according to the present invention is provided in the areas where the temperature change is large.
本発明に係る熱伝導率の大きな金属２とは、
銅、銅合金、金、銀のうちの１種以上であつて、
その形状は第１図に示すように中空ロール内周面
に全長にわたつて設けるもの、第２図のように耐
熱鋼の間にサンドイツチ状に設けるもの、又は、
第３図のように温度変化の大きい部分に設けるも
ののいずれであつてよく、また、熱伝導率の大き
な金属２の層厚は、耐熱鋼１の厚さの0.2〜５倍
の範囲内とするのが望ましく、0.2倍未満では均
温効果が十分ではなく、逆に５倍を超えるとその
効果が飽和しロール重量を増加させるので好まし
くない。 The metal 2 with high thermal conductivity according to the present invention is:
One or more of copper, copper alloy, gold, and silver,
As shown in Figure 1, the shape is provided on the inner circumferential surface of the hollow roll over the entire length, as shown in Figure 2, it is provided in the shape of a sandwich between heat-resistant steel, or
As shown in Figure 3, it may be provided in any part where temperature changes are large, and the layer thickness of the metal 2 with high thermal conductivity shall be within the range of 0.2 to 5 times the thickness of the heat-resistant steel 1. If it is less than 0.2 times, the temperature-uniforming effect will not be sufficient, and if it exceeds 5 times, the effect will be saturated and the weight of the roll will increase, which is not preferable.
［実施例］
本発明の実施例を第４図に示す。使用したロー
ルは、外径114.3mm、肉厚11.1mmのSUS 304製中
空ロールの内周面に肉厚7.9mmの銅の層と、更に
その内面に肉厚2.1mmのSUS 304の層を付加した
もので、高温の炉内で、ロール中央部を冷却した
場合の測温結果を示した。[Example] An example of the present invention is shown in FIG. The roll used was a hollow roll made of SUS 304 with an outer diameter of 114.3 mm and a wall thickness of 11.1 mm.A copper layer with a thickness of 7.9 mm was added to the inner peripheral surface, and a layer of SUS 304 with a wall thickness of 2.1 mm was added to the inner surface. This shows the temperature measurement results when the center of the roll was cooled in a high-temperature furnace.
又比較例として外径114.3mm、肉厚11.1mmの
SUS 304の中空ロールを同じ条件でセツトし、
両者の表面温度分布を調査した。その結果は同図
に示す様に、本発明のハースロールは従来のロー
ルに比較して中央部と加熱部の温度差ΔT1とΔT2
の比が１／３に減少しており、均温化の効果が確
認された。 Also, as a comparative example, the outer diameter is 114.3 mm and the wall thickness is 11.1 mm.
A hollow roll of SUS 304 was set under the same conditions,
The surface temperature distribution of both was investigated. As shown in the figure, the hearth roll of the present invention has a temperature difference ΔT 1 and ΔT 2 between the central part and the heated part compared to the conventional roll.
The ratio was reduced to 1/3, confirming the effect of temperature equalization.
［発明の効果］
従来ロールを使用した場合、幅変更量を大きく
すると座屈が発生するが、これはこの時の板幅増
加部と板エツジの温度差が座屈発生限界温度を超
えるためと考えられる。これに対し第４図に示す
様に本発明ロールを用いると、ロール幅方向温度
差は十分小さくなり、座屈発生限界温度差を下ま
わる事になり、板幅変更の制約が解消される。[Effect of the invention] When conventional rolls are used, buckling occurs when the amount of width change is increased, but this is because the temperature difference between the increased width part and the edge of the plate exceeds the limit temperature for buckling. Conceivable. On the other hand, when the roll of the present invention is used as shown in FIG. 4, the temperature difference in the width direction of the roll becomes sufficiently small and falls below the limit temperature difference for buckling, and the restriction on changing the sheet width is eliminated.
加えて本発明によつて板幅変更可能範囲が広が
つた事により、従来幅変更可能範囲を超える量の
変更が必要になつた時、中間サイズの生産計画外
の鋼板を通して操業するなど生産性を低下させて
いた点が解消される。また、ロール温度分布が大
きいため部分的に熱膨張量が異なり適正ロールク
ラウンが得られなかつた点も改善され安定通板が
可能になる。 In addition, the range in which plate width can be changed has been expanded by the present invention, so when it becomes necessary to change the width beyond the conventional range, productivity may be reduced by operating with intermediate-sized steel plates that are not in the production plan. The problem that was causing the problem to decrease has been resolved. In addition, the problem of not being able to obtain an appropriate roll crown due to the large roll temperature distribution, where the amount of thermal expansion differs locally, is improved, and stable sheet threading becomes possible.
第１図は本発明の実施例を示す断面図であり、
第２図及び第３図は本発明の他の実施例を示す断
面図、第４図は本発明の実施例でハースロールの
温度分布を示す図である。
１……耐熱鋼、２，２Ａ，２Ｂ……熱伝導率の
大きい金属、３……中空ロール。
FIG. 1 is a sectional view showing an embodiment of the present invention,
FIGS. 2 and 3 are cross-sectional views showing other embodiments of the present invention, and FIG. 4 is a diagram showing the temperature distribution of a hearth roll in an embodiment of the present invention. 1... Heat-resistant steel, 2, 2A, 2B... Metal with high thermal conductivity, 3... Hollow roll.
Claims (1)
率の大きな金属を層状に設けたことを特徴とする
金属薄板の連続熱処理用ハースロール。 ２ 耐熱鋼からなる中空ロールの内周面に熱伝導
率の大きな金属を被熱処理材のエツジが通過する
範囲をカバーするよう層状に設けたことを特徴と
する金属薄板の連続熱処理用ハースロール。 ３ 熱伝導率の大きな金属は銅、銅合金、金、銀
のうちの１種又は２種以上である請求項１又は２
記載のハースロール。[Claims] 1. A hearth roll for continuous heat treatment of thin metal sheets, characterized in that a metal having high thermal conductivity is provided in a layer on the inner peripheral surface of a hollow roll made of heat-resistant steel. 2. A hearth roll for continuous heat treatment of thin metal sheets, characterized in that a metal with high thermal conductivity is provided in layers on the inner peripheral surface of a hollow roll made of heat-resistant steel so as to cover the range through which the edges of the material to be heat treated pass. 3. Claim 1 or 2, wherein the metal with high thermal conductivity is one or more of copper, copper alloy, gold, and silver.
Hearth roll as described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31643888A JPH02163326A (en) | 1988-12-16 | 1988-12-16 | Hearth roll for continuous heat treatment of thin metallic sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31643888A JPH02163326A (en) | 1988-12-16 | 1988-12-16 | Hearth roll for continuous heat treatment of thin metallic sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02163326A JPH02163326A (en) | 1990-06-22 |
| JPH0530886B2 true JPH0530886B2 (en) | 1993-05-11 |
Family
ID=18077088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31643888A Granted JPH02163326A (en) | 1988-12-16 | 1988-12-16 | Hearth roll for continuous heat treatment of thin metallic sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02163326A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04285132A (en) * | 1991-03-12 | 1992-10-09 | Nippon Steel Corp | Structure of conveying roll in continuous heat treatment equipment for strip |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61147819A (en) * | 1984-12-19 | 1986-07-05 | Kawasaki Steel Corp | Hearth roll for continuous heat treating furnace |
| JPS62127428A (en) * | 1985-11-27 | 1987-06-09 | Mitsubishi Heavy Ind Ltd | Cooling roll for long and narrow substance such as steel strip |
-
1988
- 1988-12-16 JP JP31643888A patent/JPH02163326A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02163326A (en) | 1990-06-22 |
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