JPH069705B2 - Induction heating equipment in thick steel plate production line - Google Patents
Induction heating equipment in thick steel plate production lineInfo
- Publication number
- JPH069705B2 JPH069705B2 JP61274351A JP27435186A JPH069705B2 JP H069705 B2 JPH069705 B2 JP H069705B2 JP 61274351 A JP61274351 A JP 61274351A JP 27435186 A JP27435186 A JP 27435186A JP H069705 B2 JPH069705 B2 JP H069705B2
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- width direction
- thick steel
- induction heating
- production line
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
- B21B37/76—Cooling control on the run-out table
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Description
【発明の詳細な説明】 (イ)産業上の利用分野 本発明は、厚鋼板製造ラインにおける誘導加熱装置に関
するものである。TECHNICAL FIELD The present invention relates to an induction heating device in a thick steel plate production line.
(ロ)従来技術 従来の圧延後水冷をして厚板を製造する方法において
は、圧延後の鋼板温度分布がそのまま残るものとして鋼
板均一冷却法が工夫されてきた。しかし、この水冷方法
の工夫だけでは、均質な冷却には限界があり、鋼板幅方
向エッジ部、長手方向先後端部では、水冷前に温度低下
が生じ、仕上り製品の機械的特性の変動をもたらす。(B) Conventional technology In the conventional method of manufacturing a thick plate by water cooling after rolling, a uniform steel plate cooling method has been devised so that the temperature distribution of the steel plate after rolling remains unchanged. However, there is a limit to uniform cooling only by devising this water cooling method, and at the steel plate width direction edge part, longitudinal direction front and rear end part, temperature drop occurs before water cooling, which causes fluctuations in mechanical properties of the finished product. .
また時として、圧延後の温度分布変動がそのまま仕上り
製品の残留応力分布変動に結び付き鋼板の変形、切断時
の変形を生じる可能性がある。Further, sometimes, the temperature distribution fluctuation after rolling is directly connected to the residual stress distribution fluctuation of the finished product, which may cause deformation of the steel sheet or deformation at the time of cutting.
(ハ)発明が解決しようとする問題点 本発明が解決しようとする問題点は、圧延中または圧延
後の厚鋼板の幅方向の温度分布を測定し、その温度分布
にもとづいて板幅方向に誘導加熱を施して均質な厚鋼板
を得ることにある。(C) Problems to be solved by the invention Problems to be solved by the present invention include measuring the temperature distribution in the width direction of a thick steel plate during or after rolling, and in the plate width direction based on the temperature distribution. Induction heating is applied to obtain a homogeneous thick steel plate.
(ニ)問題点を解決するための手段 本発明の誘導加熱装置は、熱間圧延後強制冷却によって
鋼の強靭化を図る厚鋼板製造ラインにおいて、熱間圧延
機間または該熱間圧延機と強制冷却装置との間に誘導加
熱装置を設け、該誘導加熱装置を鋼板の幅方向に部分的
に加熱調節自在に構成し、鋼板の幅方向温度分布にもと
づいて前記誘導加熱装置の板幅方向加熱温度を制御する
ことによって、上記問題点を解決している。(D) Means for solving the problem The induction heating apparatus of the present invention is a thick steel plate production line for strengthening steel by forced cooling after hot rolling, in a hot rolling mill or with the hot rolling mill. An induction heating device is provided between the forced cooling device and the induction heating device so that the heating can be partially adjusted in the width direction of the steel plate, and the plate width direction of the induction heating device is based on the temperature distribution in the width direction of the steel plate. The above problems are solved by controlling the heating temperature.
(ホ)実施例 第１図から第３図までを参照して、本発明の誘導加熱装
置10の実施例について説明する。(E) Embodiment An embodiment of the induction heating device 10 of the present invention will be described with reference to FIGS. 1 to 3.
まず、第１図に示すように、厚板圧延機１と強制冷却装
置２とからなる厚鋼板製造ライン３において、本発明に
もとづく誘導加熱装置10が厚板圧延機１と強制冷却装置
２との間に設けられる。First, as shown in FIG. 1, in a thick steel plate production line 3 including a thick plate rolling mill 1 and a forced cooling device 2, an induction heating device 10 according to the present invention includes a thick plate rolling mill 1 and a forced cooling device 2. It is provided between.
本発明の誘導加熱装置10は、複数箇の誘導コイル11、温
度計12、制御装置13からできている。温度計12は適当箇
所に設置され、厚鋼板４の幅方向温度分布を検出し、制
御装置13に送る。厚鋼板４は圧延中または圧延後のいず
れでもよい。The induction heating device 10 of the present invention comprises a plurality of induction coils 11, a thermometer 12, and a control device 13. The thermometer 12 is installed at an appropriate location, detects the temperature distribution in the width direction of the thick steel plate 4, and sends it to the control device 13. The thick steel plate 4 may be rolled or rolled.
誘導コイル11は、第２図に示すように、厚鋼板４の幅方
向にわたって上下から対向し、複数分割されていて、そ
れぞれ別個独立して通電される。これにより、厚鋼板４
の幅方向および表裏面を部分的に別個独立して加熱でき
る。As shown in FIG. 2, the induction coil 11 opposes from above and below in the width direction of the thick steel plate 4, is divided into a plurality, and is independently and independently energized. As a result, the thick steel plate 4
The width direction and the front and back surfaces can be partially and independently heated.
誘導コイル11は、第３図に示すように、厚鋼板４の板厚
に合せて上下に位置調節ができる。図において、14は断
熱板である。As shown in FIG. 3, the induction coil 11 can be vertically adjusted according to the plate thickness of the thick steel plate 4. In the figure, 14 is a heat insulating plate.
再び、第１図に戻って、誘導コイル11は、板幅方向温度
分布にもとづく加熱制御信号を制御装置13から受けて、
板幅方向に加熱制御される。Returning to FIG. 1 again, the induction coil 11 receives a heating control signal based on the temperature distribution in the plate width direction from the control device 13,
Heating is controlled in the plate width direction.
制御装置13は、強制冷却装置２の冷却機能を制御しても
よい。The controller 13 may control the cooling function of the forced cooling device 2.
第４図から第８図までを参照して本発明装置による各種
効果を説明する。比較のために、従来装置による各種効
果についても併せて示す。ここで、従来装置とは、本発
明装置のように、鋼板の幅方向温度分布を強制的に制御
せずに、鋼板を単に空冷する装置をいう。Various effects of the device of the present invention will be described with reference to FIGS. 4 to 8. For comparison, various effects of the conventional device are also shown. Here, the conventional apparatus refers to an apparatus that simply cools the steel sheet by air without forcibly controlling the temperature distribution in the width direction of the steel sheet, unlike the apparatus of the present invention.
第４図は、従来の水冷材を従来装置によって圧延した後
に板幅方向の温度分布を測定した結果（実線）と、本発
明装置によってエッジ部のみを加熱したときの温度分布
を測定した結果（破線）とを示す。この場合の板幅方向
の引張強度を第５図に示す。これにより、本発明装置に
よれば、板幅方向の引張強度が均質化されることがわか
る。FIG. 4 shows the result of measuring the temperature distribution in the sheet width direction after rolling the conventional water-cooled material by the conventional device (solid line) and the result of measuring the temperature distribution when only the edge portion is heated by the device of the present invention ( And the broken line). The tensile strength in the plate width direction in this case is shown in FIG. From this, it is understood that according to the device of the present invention, the tensile strength in the plate width direction is homogenized.
厚鋼板の長手方向先後端における同様な実施結果を第６
図および第７図に示す。The same results of execution at the front and rear ends of the thick steel plate in the longitudinal direction are
Shown in Figures and 7.
従来装置による場合、鋼板の先後端は中間部に比べて温
度降下が大きい（第６図の破線）。そのため、第７図に
破線で示すように、温度降下分だけ引張り強さが上昇す
る。これを改善するために、本発明装置では鋼板の長手
方向温度分布を圧延中（圧延中および圧延後）に計測
し、本発明装置によって鋼板の先後端を加熱し長手方向
温度分布を均一にした（第６図の実線および１点鎖
線）。In the case of using the conventional device, the temperature drop at the front and rear ends of the steel plate is larger than that at the middle part (broken line in FIG. 6). Therefore, as shown by the broken line in FIG. 7, the tensile strength increases by the amount of temperature decrease. In order to improve this, in the apparatus of the present invention, the temperature distribution in the longitudinal direction of the steel sheet was measured during rolling (during rolling and after rolling), and the leading and trailing ends of the steel sheet were heated by the apparatus of the present invention to make the longitudinal temperature distribution uniform. (Solid line and dashed line in FIG. 6).
この制御方法は計測された長手方向温度分布をもとに、
鋼板の送搬速度と誘導コイル通電電流および時間によっ
て決定される。すなわち、温度低下部分が本発明装置の
誘導コイルを通過するときにコイルに通電されるように
なっている。第７図の実線は、そのときの引張り強さが
従来装置に比べて長手方向に均一となった結果を示す。This control method is based on the measured temperature distribution in the longitudinal direction.
It is determined by the feeding speed of the steel sheet, the current flowing through the induction coil, and the time. That is, the coil is energized when the temperature-decreasing portion passes through the induction coil of the device of the present invention. The solid line in FIG. 7 shows the result that the tensile strength at that time was more uniform in the longitudinal direction than in the conventional device.
本発明装置を使用して得られた厚鋼板（５０キロＨＴ）
について条切りした後のキャンバ量の測定結果を第８図
に示す。本発明装置によれば、キャンバ量を１ｍｍ／ｍ
以内に管理できる。Thick steel plate (50 kg HT) obtained using the device of the present invention
Fig. 8 shows the measurement results of the amount of camber after cutting the strips. According to the device of the present invention, the camber amount is 1 mm / m.
Can be managed within.
幅方向鋼板内残留応力分布が、切断後キャンバ発生につ
ながることは周知である。鋼板内残留応力は、鋼板の温
度分布に起因することは容易に考えられる。この現象は
水冷材に多く、水冷後の鋼板内温度分布差（特に幅方
向）が大きいことが原因である。第８図は本発明装置を
用いて鋼板内温度分布を制御し、残留応力分布を軽減さ
せた結果、切断後のキャンバ量が改善できた例（図中の
●印）を示したものである。第５図と第８図とが対応関
係にある。It is well known that the distribution of residual stress in the widthwise steel sheet leads to the generation of camber after cutting. It is easily conceivable that the residual stress in the steel sheet is due to the temperature distribution of the steel sheet. This phenomenon is common to water-cooled materials and is caused by a large difference in temperature distribution in the steel sheet after water cooling (especially in the width direction). FIG. 8 shows an example in which the camber amount after cutting was improved as a result of reducing the residual stress distribution by controlling the temperature distribution in the steel sheet using the device of the present invention (marked by ● in the figure). . FIG. 5 and FIG. 8 have a correspondence relationship.
(ヘ)効 果 本発明によれば、厚鋼板の幅方向の温度分布を均一にす
ることにより、鋼板の機械的性質を均質化し、歩留向上
を図ることができる。(F) Effect According to the present invention, the temperature distribution in the width direction of the thick steel plate is made uniform, so that the mechanical properties of the steel plate are homogenized and the yield can be improved.
第１図は本発明の誘導加熱装置を備えた厚鋼板の製造ラ
インの説明図。第２図は本発明の誘導加熱装置の説明
図。第３図は第２図のIII−III線からみた側面図。第４
図は厚鋼板の圧延後の温度分布を示すグラフ。第５図は
強制冷却後の厚鋼板の引張強度の幅方向変化を示すグラ
フ。第６図は厚鋼板のクロップ部の温度分布を示すグラ
フ。第７図は厚鋼板のクロップ部の引張強度を示すグラ
フ。 第８図は条切り試験結果を示すグラフ。 １：厚板圧延機 ２：強制冷却装置 ３：厚鋼板製造ライン 10：誘導加熱装置 11：誘導コイル 12：温度計FIG. 1 is an explanatory view of a thick steel plate production line equipped with the induction heating device of the present invention. FIG. 2 is an explanatory view of the induction heating device of the present invention. FIG. 3 is a side view seen from the line III-III in FIG. Fourth
The figure is a graph showing the temperature distribution of thick steel plate after rolling. FIG. 5 is a graph showing the change in tensile strength in the width direction of the thick steel plate after forced cooling. FIG. 6 is a graph showing the temperature distribution in the crop portion of the thick steel plate. FIG. 7 is a graph showing the tensile strength of the crop portion of thick steel plate. FIG. 8 is a graph showing the result of the strip cutting test. 1: Thick plate rolling machine 2: Forced cooling device 3: Thick steel plate production line 10: Induction heating device 11: Induction coil 12: Thermometer
Claims (1)
図る厚鋼板製造ラインにおいて、熱間圧延機間または該
熱間圧延機と強制冷却装置との間に誘導加熱装置を設
け、該誘導加熱装置は、厚鋼板の幅方向にわたって上下
から対向させて、複数分割しそれぞれ別個独立して通電
するように構成された誘導コイルと、鋼板の幅方向の温
度を測定する温度計と、該温度計によって計測した鋼板
の幅方向温度分布にもとづいて前記各誘導コイルの通電
を調節して板幅方向加熱温度を制御する制御装置とを備
えていることを特徴とした厚鋼板製造ラインにおける誘
導加熱装置。1. In a thick steel plate production line for strengthening steel by forced cooling after hot rolling, an induction heating device is provided between the hot rolling mills or between the hot rolling mill and the forced cooling device. The induction heating device is made to face each other in the width direction of the thick steel plate from above and below, an induction coil configured to be divided into a plurality of parts and to be independently energized, a thermometer for measuring the temperature of the steel plate in the width direction, and Induction in a thick steel plate manufacturing line, characterized by comprising a control device for controlling the heating temperature in the width direction by adjusting the energization of each induction coil based on the temperature distribution in the width direction of the steel plate measured by a thermometer. Heating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61274351A JPH069705B2 (en) | 1986-11-18 | 1986-11-18 | Induction heating equipment in thick steel plate production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61274351A JPH069705B2 (en) | 1986-11-18 | 1986-11-18 | Induction heating equipment in thick steel plate production line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63126608A JPS63126608A (en) | 1988-05-30 |
| JPH069705B2 true JPH069705B2 (en) | 1994-02-09 |
Family
ID=17540445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61274351A Expired - Lifetime JPH069705B2 (en) | 1986-11-18 | 1986-11-18 | Induction heating equipment in thick steel plate production line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH069705B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59504983D1 (en) * | 1995-01-16 | 1999-03-11 | Mannesmann Ag | Device for guiding hot rolled strip through an inductor |
| US6615633B1 (en) | 1999-11-18 | 2003-09-09 | Nippon Steel Corporation | Metal plateness controlling method and device |
| JP2001137943A (en) * | 1999-11-18 | 2001-05-22 | Nippon Steel Corp | Method and device for controlling flatness of metallic sheet |
| JP4747465B2 (en) * | 2001-09-04 | 2011-08-17 | Ｊｆｅスチール株式会社 | Stainless steel sheet manufacturing method and manufacturing apparatus |
| JP4779006B2 (en) * | 2008-11-11 | 2011-09-21 | 株式会社ムロコーポレーション | Architectural screws |
| CN110116141A (en) * | 2018-02-07 | 2019-08-13 | 宝山钢铁股份有限公司 | A kind of heating system of adaptive magnesium alloy board warm-rolling process temperature distribution |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60166113A (en) * | 1984-02-09 | 1985-08-29 | Nippon Steel Corp | Control device of slab-end heating |
| JPS60174833A (en) * | 1984-02-20 | 1985-09-09 | Nippon Steel Corp | Cooling method of hot steel sheet |
-
1986
- 1986-11-18 JP JP61274351A patent/JPH069705B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63126608A (en) | 1988-05-30 |
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