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1. 发明专利

JP2003136123A ROLLING METHOD AND APPARATUS OF HOT ROLLED STEEL STRIP 审中-公开
公开(公告)号：JP2003136123A
公开(公告)日：2003-05-14
申请号：JP2002267664
申请日：2002-09-13
申请人： NIPPON KOKAN KK
发明人： MINOTE TORU , AZUMA SHOZO , MASUDA SADAKAZU , YAMAMOTO MASAAKI , TERAUCHI TAKUMASA , EDA TAKATOMO
IPC分类号： B21B1/26 , B21B45/00
摘要： PROBLEM TO BE SOLVED: To produce a hot rolled steel strip heating the rough bar by uniform temperature widthwise without generating temperature difference between both edge portions and a central portion and having superior shapes and accuracy widthwise when heating the rough bar provided for hot rolled steel strip by a solenoid type induction heating apparatus at an inlet side of a finish rolling mill. SOLUTION: The solenoid type induction heating apparatus 4 heating the rough bar 2 widthwise in its entirety and an edge heater 6 heating both edges of the rough bar 2 are arranged between the rough rolling mill 1 and a finish rolling mill 8. The rough bar 2 at an inlet side of the finish rolling mill 8 is heated so as to be at a uniform temperature in a widthwise direction by means of the solenoid type induction heating apparatus 4 and edge heater 6.

2. 发明专利

JP2002113512A METHOD FOR ROLLING HOT-ROLLED STEEL STRIP 审中-公开
公开(公告)号：JP2002113512A
公开(公告)日：2002-04-16
申请号：JP2001260371
申请日：2001-08-29
申请人： NIPPON KOKAN KK
发明人： MINOTE TORU , HINO YOSHIMICHI , MASUDA SADAKAZU , YAMAMOTO MASAAKI , EDA TAKATOMO , TERAUCHI TAKUMASA , MIHARA YUTAKA
IPC分类号： B21B1/26 , B21B45/00
摘要： PROBLEM TO BE SOLVED: To provide a rolling method of a hot-rolled steel strip for reducing scale loss by lowering the heating temperature of a slab and also evading problems from the viewpoint of rolling acompanying the lowering of the heating temperature of the slab, that is, the problems about the skid-mark parts where temperature is lower. SOLUTION: This rolling method of the hot-rolled stock is provided with a stage for heating the slab, a stage for making the slab into a rough bar by rough-rolling the heated slab, a heating stage for heating the rough bar which is obtained by rough rolling over the entire width direction and a stage for performing the finish rolling of the heated rough bar. In this rolling method of the hot-rolled steel strip, in the stage for heating the slab, the slab is heated to

3. 发明专利

JPH1177113A EQUIPMENT TRAIN FOR MANUFACTURING CONTINUOUSLY CAST AND HOT ROLLED STEEL STRIP AND MANUFACTURE OF HOT ROLLED STEEL STRIP 失效
公开(公告)号：JPH1177113A
公开(公告)日：1999-03-23
申请号：JP26482797
申请日：1997-09-11
申请人： NIPPON KOKAN KK
发明人： MURATA SATOSHI , MASUDA SADAKAZU , MINOTE TOORU , TERAUCHI TAKUMASA , OKAZAKI SHINJI , YAMASHINA SHUICHI
IPC分类号： B22D11/12 , B21B1/00 , B21B1/26 , B21B1/46 , B21B13/22 , B21B15/00 , B21B45/00 , B21J1/04
摘要： PROBLEM TO BE SOLVED: To efficiently obtain a high-quality hot rolled steel strip without internal defects with equipment of compact constitution by providing a forging means as at least a part of thickness reducing means in rough working equipment and providing a means for flying cutting the hot rolled steel strip between a finishing mill group and a coiler. SOLUTION: A hot long size slab 20 which is cast with a continuous casting equipment 1 is fed to the rough working equipment 2 as it is not cut, its thickness is reduced to the thickness of a sheet bar by forging with a thickness forging device 6 comprising the rough working equipment 2 and, successively, the hot rolled steel strip 21 is made by rolling the sheet bar to the prescribed thickness of a product. This strip is coiled with coilers 5a, 5b and a steel strip coil is made. At this time, first, the steel strip 21 is coiled with the coiler 5a, the steel strip 21 during traveling is cut with the flying shear 4 when the coil becomes a prescribed length as the product coil and the succeeding steel strip 21 from this cut part is coiled with the coiler 5b. On the coiler 5b, when the coil becomes the prescribed length, the steel strip is cut with the flying shear 4.

4. 发明专利

JPH10237551A PRODUCTION OF HOT ROLLED STEEL SHEET EXCELLENT IN FATIGUE CHARACTERISTIC AND STRETCH-FLANGING PROPERTY 失效
公开(公告)号：JPH10237551A
公开(公告)日：1998-09-08
申请号：JP4069597
申请日：1997-02-25
申请人： NIPPON KOKAN KK
发明人： NAKAHARA TAKESHI , INAZUMI TORU , FUNAKAWA YOSHIMASA , KIZU TARO , TERAUCHI TAKUMASA , YAMAMOTO MASAAKI
IPC分类号： C21D8/04 , C21D9/46 , C22C38/00 , C22C38/04
摘要： PROBLEM TO BE SOLVED: To produce a steel sheet in which crystal grains in the specified range of thickness in the surface layer are refined and having high fatigue strength and good workability by subjecting the surface layer part of a rough bar obtd. by executing rough rolling at a specified temp. or above to cooling to the Ar3 transformation point or below, executing reheating to recuperate it to the Ac3 transformation point or above, specifying the time till the completion of finish-rolling at the Ar3 transformation point or above and coiling it at a specified temp. or below. SOLUTION: A steel is subjected to rough rolling at >=1150 deg.C, is subjected to finish rolling and is thereafter coiled at 5 to

5. 发明专利

JPH07310087A PREVENTING AGENT FOR FUSION OF STRIP IN CAUSING ABNORMAL ROLLING IN HOT ROLLING ROLL 失效
公开(公告)号：JPH07310087A
公开(公告)日：1995-11-28
申请号：JP10557794
申请日：1994-05-19
申请人： KYODO YUSHI , NIPPON KOKAN KK
发明人： SHIRATA MASANORI , SAKAKIBARA MASAYOSHI , KAMIYASHIKI HIROSHI , YAMAMOTO MASAHIDE , TANIAI JUN , NAKAYAMA TAKASHI , TERAUCHI TAKUMASA
IPC分类号： C10M173/02 , C10N10/04 , C10N40/24
摘要： PURPOSE:To obtain the subject preventing agent capable of preventing a strip broken by an abnormal rolling phenomenon (rolling of an overlapped tail of steel) in a hot rolling roll from fusing to the roll and cracks from propagating by blending calcium carbonate with a water-soluble polymer and water in a specific proportion. CONSTITUTION:This preventing agent comprises (A) 5-50wt.%, preferably 10-50wt.% calcium carbonate, (B) 0.3-20wt.%, preferably 0.5-10wt.% water-soluble polymer (preferably a cellulosic nonelectrolytic water-soluble polymer such as methyl cellulose) and (C) the remainder of water. Calcium carbonate having 0.1-10mum average particle diameter is preferred as the component (A). A preservative, a rust preventing agent, etc., as necessary, can be added to the preventing agent.

6. 发明专利

JPH05185123A METHOD FOR DRIVING ROLLING MILL 失效
公开(公告)号：JPH05185123A
公开(公告)日：1993-07-27
申请号：JP2055792
申请日：1992-01-09
申请人： NIPPON KOKAN KK
发明人： TERAUCHI TAKUMASA , MOTOYASHIKI YOICHI , IKEDA TSUNEO , FURUKAWA ITSUO , SUGA SAKAE , SUZUKI SHIGERU
IPC分类号： B21B31/10 , B21B31/20 , B21B31/24 , B21B31/32
摘要： PURPOSE:To reduce a time for recombining work rolls by setting the oil column height of a hydraulic cylinder to the maximum height leaving an oil column height which does not damage automatic plate thickness control at time of rolling. CONSTITUTION:At the time of rolling, the oil column height Xa of the hydraulic cylinder 6 is set to the maximum height leaving an oil column height which does not damage automatic plate thickness control. At the time of roll recombination, when an upper backup roll chock 9 is elevated, the upper backup roll chock 9 can be elevated by the hydraulic cylinder 6, too, therefore, the elevating quantity Eb of the roll chock 9 can be reduced by and electric screw nut 7. By the same reason, the moving quantity Ec of the electric screw nut 7 when the roll kiss is controlled to zero can be reduced. At the starting time of rolling immediately after recombination of rolls, too, the moving quantity Ed of the electric screw nut 7 can be reduced in the same way. Consequently, use of the electric screw nut 7 is diminished as a whole and the recombination time can be shortened.

7. 发明专利

JPH04318412A MEASURING METHOD OF PLATE THICKNESS OF STRIP 失效
公开(公告)号：JPH04318412A
公开(公告)日：1992-11-10
申请号：JP11114691
申请日：1991-04-16
申请人： NIPPON KOKAN KK
发明人： MOTOYASHIKI YOICHI , TERAUCHI TAKUMASA , IKEDA TSUNEO , FURUKAWA ITSUO , SUGA SAKAE , SUZUKI SHIGERU
IPC分类号： G01B15/02 , G01B21/08
摘要： PURPOSE:To correctly measure the plate thickness distribution in the widthwise direction of a strip and the plate thickness of an edge part of the strip. CONSTITUTION:A second plate thickness measuring device 2 which reciprocates along the widthwise direction of a strip 5 is calibrated by the measuring value of a first plate thickness measuring device 1 fixed on the center of a moving line of the strip 5. A third and a fourth plate thickness measuring devices 3, 4 fixed on the moving line of an edge part of the strip 5 are calibrated by the measuring value of the second plate thickness measuring device 2.

8. 发明专利

JPH0360804A CONTINUOUS ROLLING METHOD FOR MATERIAL HARD TO WELD 失效
公开(公告)号：JPH0360804A
公开(公告)日：1991-03-15
申请号：JP19669589
申请日：1989-07-31
申请人： NIPPON KOKAN KK
发明人： TANABE SHUNICHI , JITSUKAWA MASAHARU , AKAMATSU SHIGERU , TERAUCHI TAKUMASA , IZUSHI TOMOYA , JIROUMARU KAZUMI
IPC分类号： B21B1/26 , B21B1/28 , B21B3/02 , B21B15/00 , B23K26/21
摘要： PURPOSE:To roll a material hard to weld while performing the connection between coils in a continuous line by connecting a preceding coil and succeeding coil via a leader strip connected to a hot rolling coil and rolling the leader strip and hot rolling plate with the same schedule. CONSTITUTION:In an auxiliary line out of the continuous line, a leader strip whose welding is comparatively easy is connected to both ends of a hot rolling coil A first by a laser welding machine, etc., in advance. The hot rolling coil A connected with the leader strip is fitted into a pickling and continuous cold rolling lines, and the leader strip of the preceding coil rear end and that of the succeeding coil tip are connected by a flash butt welder 5. In the continuous rolling line, the change of the rolling schedule corresponding to the deformation resistance of the hot rolling coil and leader strip is not performed and the leader strip is rolled with the same schedule as that of the hot rolling coil. Consequently, the continuous rolling of the material hard to weld of an electrical steel sheet, etc., can be performed without lowering the productivity.

9. 发明专利

JPH01143709A ROLLING METHOD 失效
公开(公告)号：JPH01143709A
公开(公告)日：1989-06-06
申请号：JP30272087
申请日：1987-11-30
申请人： NIPPON KOKAN KK
发明人： TANIGUCHI ISAO , YAMAZAKI YOSHIMASA , TERAUCHI TAKUMASA
IPC分类号： B21B37/28 , B21B37/00
摘要： PURPOSE:To maintain a sheet thickness within the tolerance of for sheet thickness and to improve the yield of stock by measuring the sheet thickness in the central part in a width direction and at the end part in a rolling process, deciding the optimum desired sheet thickness according to these measured values and controlling the rolling reduction force impressed on the stock. CONSTITUTION:The sheet thickness in the central part in a width direction, the sheet thickness at the end part in a width direction, the width and length are detected respectively by detectors 16, 18 20. These are inputted to an arithmetic unit 22, safety values added at a preset time are canceled and the desired thickness is enumerated according to the measured values of varied thicknesses and measured widths. A signal of a desired thickness enumerated is inputted to a controller 24 and the signal of the desired sheet thickness obtained and the signal of the desired sheet thickness enumerated are compared according to the rolling reduction inputted from each sensor of rolling mills 10 to the controllers 24. Until the voltage difference between both signals becomes zero, AGC 26 is controlled by the controller 24 and the rolling reductions of the rolling mills 10 are corrected.

10. 发明专利

JPH10219350A PRODUCTION OF DIRECT HOT ROLLED STEEL SHEET EXCELLENT IN PLATING BLISTERING RESISTANCE 失效
公开(公告)号：JPH10219350A
公开(公告)日：1998-08-18
申请号：JP2265697
申请日：1997-02-05
申请人： NIPPON KOKAN KK
发明人： FUNAKAWA YOSHIMASA , INAZUMI TORU , KIZU TARO , NAKAHARA TAKESHI , TANIAI JUN , TERAUCHI TAKUMASA
IPC分类号： B21B1/46 , C21D8/02 , C22C38/00 , C22C38/06 , C23C2/02
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a hot rolled steel sheet for the substrate of hot dip galvanizing excellent in plating blistering resistance even in direct rolling. SOLUTION: In direct rolling in which a steel contg., by mass, =50 deg.C at the average temp. rising rate of >=10 deg.C per sec, furthermore, the temp. of the rough bar after the rapid heating is regulated to

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