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1. 发明专利

JPH03128104A MULTISTEP ROLLING MILL 失效
公开(公告)号：JPH03128104A
公开(公告)日：1991-05-31
申请号：JP26307389
申请日：1989-10-11
申请人： KAWASAKI STEEL CO , DAINI YOSHIDA KINEN TEKKOSHO
发明人： WATANABE YUICHIRO , KENMOCHI KAZUHITO , YARITA YUKIO , AMANO HIROO
IPC分类号： B21B13/14
摘要： PURPOSE:To obtain a rolling material with good quality by making the intermediate housing which holds a back-up roll a bisecting type and arranging a cylinder for rolling reduction and load cell between an integrated housing and each intermediate housing. CONSTITUTION:A pair of working rolls vertically inching the pass line of the material (s) to be rolled, four 1st intermediate rolls 2 arranged with their contact to the back thereof and a 2nd intermediate roll 3 arranged with its contact to the back of the 1st intermediate roll are equipped. Eight backup rolls 4 are equipped at the back of the 2nd intermediate roll and respectively held on the intermediate housing 5 which arranged the backup rolls vertically. Each intermediate housing is built in an integrated type housing 6 and a cylinder 7 for rolling reduction and load cell 8 are arranged between the integrated housing and each intermediate housing. A rolling load is correctly measured by the load cell, a rolling object can be rolled in a correct thickness and no roll mark is generated. The rolling material with good quality can thus be obtd.

2. 发明专利

JP2000282152A PRODUCTION OF FERRITIC STAINLESS STEEL SHEET EXCELLENT IN WORKABILITY 失效
公开(公告)号：JP2000282152A
公开(公告)日：2000-10-10
申请号：JP9041799
申请日：1999-03-31
申请人： KAWASAKI STEEL CO
发明人： MATSUBARA YUKIHIRO , HIRUTA TOSHIKI , KITAHAMA MASANORI , YARITA YUKIO
IPC分类号： B21B3/02 , C21D8/02 , C21D9/46 , C21D9/48
摘要： PROBLEM TO BE SOLVED: To improve the workability of a steel sheet and to reduce the creeping amt. of edge seam flaws by coating the side face of a ferritic stainless steel slab with an antioxidant contg. a reducing agent, executing heating and specifying the draft in the horizontal rolling in rough rolling and the draft in width rolling. SOLUTION: A slab of ferritic stainless steel having a prescribed componential compsn. is heated by a heating furnace 10, is thereafter subjected to rough rolling by a rough rolling mill line R in which rigid rolls E1 to E4 and horizontal rolls R1 to R4 are combined, this rough rolling stock is joined to a preceding rough rolling stock by a sheet bar joining device 30, is subjected to finish rolling by a finish rolling mill line F provided with horizontal rolls F1 to F7 and is coiled around a coiler 20. At this time, the side face of the slab is coated with an antioxidant contg. a reducing agent, which is heated to suppress decarburization and to prevent the coarsening of crystal grains. Moreover, the draft in the horizontal rolling pass in the rough rolling is controlled to 40 to 75%, and the width draft in the width rolling pass is controlled to the range of 0.8 to 1.5 times to the sheet width difference in the thickness direction of the stock to be rolled after the horizontal rolling pass.

3. 发明专利

JP2000263101A PRODUCTION OF FERRITIC STAINLESS STEEL PLATE 失效
公开(公告)号：JP2000263101A
公开(公告)日：2000-09-26
申请号：JP6787499
申请日：1999-03-15
申请人： KAWASAKI STEEL CO
发明人： MATSUBARA YUKIHIRO , HIRUTA TOSHIKI , YARITA YUKIO
IPC分类号： B21B1/02 , B21B3/02 , C21D8/02 , C21D9/46
摘要： PROBLEM TO BE SOLVED: To unnecessitate rolling lubricant in a rough-rolling and to reduce the enclosing amount of edger seam flaw by applying antioxidant containing reducing agent at a specified ratio to the thickness of a slab from upper edge part and the lower edge part on the whole length in the longitudinal direction of the side surface of the slab before charging into a heating furnace. SOLUTION: To the coating range of >=1/5 of the slab thickness 3 from the upper edge part and the lower edge part on the whole length in the longitudinal direction of the side surfaces of the slab 1 before charging into the heating furnace, the antioxidant containing the reducing agent is applied. The reaction for reducing oxidized scale is progressed with the reducing agent before the decarburization of the slab side edge parts progresses according to the oxidation with the oxidized scale, and the decarburization of the scale edge parts of the slab is not developed. Further, the decarburization at the side edge parts according to the oxidation with the oxygen in the atmosphere in the heating furnace, is prevented with the antioxidant. In such a way, since the decarburization at the side edge parts of the slab is prevented, even in the case of applying no width press with a width pressing device and supplying no lubricant in the rough-rolling, the enclosing amount of the edge seam flaw is reduced.

4. 发明专利

JP2000117304A COLD TANDEM ROLLING METHOD FOR METAL SHEET HAVING EXCELLENT GLOSS 失效
公开(公告)号：JP2000117304A
公开(公告)日：2000-04-25
申请号：JP29417598
申请日：1998-10-15
申请人： KAWASAKI STEEL CO
发明人： KIJIMA HIDEO , KENMOCHI KAZUHITO , YARITA YUKIO , SUNAMORI YASUMICHI , NAGAI HAJIME
IPC分类号： B21B1/22 , B21B3/02 , B21B27/00 , B21B27/02
摘要： PROBLEM TO BE SOLVED: To provide a cold tandem rolling method by which a metal sheet having excellent gloss is rolled by appropriately arranging a pair of upper and lower rolling rolls to which crossed grinding marks having the grinding marks which are inclined to the circumferential direction and crossed with each other are imparted in a cold tandem mill. SOLUTION: In a cold tandem rolling method for rolling the metal sheet with the cold tandem mill in which plural stands are continuously arranged, rolling is executed by imparting the crossed grinding marks having the grinding marks which are inclined to the circumferential direction and crossed with each other to the peripheral surface of the rolling roll and by providing the rolling rolls as a pair of the upper and lower rolls in one or more stands.

5. 发明专利

JP2000084602A MANUFACTURE OF HOT ROLLED STAINLESS STEEL SHEET 失效
公开(公告)号：JP2000084602A
公开(公告)日：2000-03-28
申请号：JP25804598
申请日：1998-09-11
申请人： KAWASAKI STEEL CO
发明人： HIRUTA TOSHIKI , SEKI HARUHIKO , KITAHAMA MASANORI , YARITA YUKIO
IPC分类号： B21B3/02
摘要： PROBLEM TO BE SOLVED: To prevent a rolled stock from burning and to improve surface quality by previously calculating the max. possible quantity of a roll lubricating oil in which the rolled stock can be bitten with rolls without slipping the rolled stock by using the numerical value of various conditions of rolling work and applying the max. quantity of the oil on the rolls of a rolling mill. SOLUTION: The rolled stock is detected with a tracking sensor 32. Reducing load is detected with a load cell 31. By using the signal of the sensor, the spraying quantity is controlled with a spray nozzle controller 33. The rolling oil is applied on the rolls by the quantity calculated by Qs=f(D, V, T, H, r, Cr, Mo, Ni, Ti, Nb), where, Qs is defined as the max. possible applying quantity (cc/min/m/roll) of the roll lubricating oil where failure of biting is not generated, D as the diameter (mm) of the roll, V as the circumferential speed (m/min) of the roll, T as the temp. ( deg.C) of the rolled stock, H as the thickness (mm) on the outlet side of the rolling mill, r as a draft (%), Cr, Mo, Ni, Ti and Nb as the content (wt.%) of each the chemical composition of the rolled stock.

6. 发明专利

JPH11319916A METHOD FOR LUBRICATING HOT ROLL AND MANUFACTURE OF HOT ROLLED STEEL SHEET 失效
公开(公告)号：JPH11319916A
公开(公告)日：1999-11-24
申请号：JP13393198
申请日：1998-05-15
申请人： KAWASAKI STEEL CO
发明人： HIRUTA TOSHIKI , WATANABE YUICHIRO , KITAHAMA MASANORI , YARITA YUKIO
IPC分类号： B24B5/37 , B21B1/26 , B21B27/10 , B21B28/04 , B24D3/00
摘要： PROBLEM TO BE SOLVED: To provide the lubricating method of hot rolls for executing the rolling in a highly lubricated state in spite of the change of rolling conditions and to obtain a hot rolled steel sheet excellent in deep drawability by applying this lubricating method. SOLUTION: In the roll lubricating method for supplying a rolling lubricant to work rolls 1 (1a, 1b) during hot rolling, the rolling oil which is mixed with water with an oil and water mixing device 2 is sprayed while grinding the work rolls with on-line roll grinders. It is better to compose the grindstones 10 (10a, 10b) of the on-line roll grinders of two or more kinds of abrasive grains having different grain diameters and to define the grain diameter of the abrasive grain on the larger side as 200-500 μm. A dead soft steel slab is heated with a heating furnace, made into a sheet bar by rough rolling with a roughing mill, the preceding material and succeeding material of the sheet bar are butted and welded and the temp. on the inlet side of a finishing mill is taken as not higher than the transformation temp. of Ar3 . The finish rolling is executed while executing roll lubrication by this method.

7. 发明专利

JPH11147116A COMPOSITE ROLL FOR METAL STRIP ROLLING AND PRODUCTION OF THE SAME 失效
公开(公告)号：JPH11147116A
公开(公告)日：1999-06-02
申请号：JP30827897
申请日：1997-11-11
申请人： KAWASAKI STEEL CO
发明人： KENMOCHI KAZUHITO , SONOBE OSAMU , KANO HIROTAKA , YARITA YUKIO
IPC分类号： B23P19/02 , B21B27/00 , B21B27/02 , B22F7/06
摘要： PROBLEM TO BE SOLVED: To obtain a low-priced roll for metal strip rolling by making a roll barrel of sintered body which is composed of two or more cylindrical bodies axially linked and providing an axial direction of a joint end of either of the roll barrel and a roll neck with a fitting hole to be fitted to an end of the other shaft. SOLUTION: A neck end 2a of a roll neck 2 is provided in the axial direction with a fitting hole 3 to be fitted to a roll barrel 1, and this fitting hole 3 is fitted with a joint projection 4 which is projectinly provided on a shaft end of the roll barrel 1 and fitted on a joint surface 5. The roll barrel 1 is composed of a sintered body which is made of a plurality of cylindrical bodies bonded at joint ports 6 by sintering. Methods of fitting between the roll neck end 2a and the roll barrel 1 are possible by fitting by making the fitting hole 3 in the roll neck 2 or by making a fitting hole in the roll barrel 1. A selection of a fitting method is decided by taking operating conditions such as temperature or stress applied to the roll into consideration.

8. 发明专利

JPH115103A ROLLING METHOD OF FERRITE SYSTEM STAINLESS STEEL PLATE 失效
公开(公告)号：JPH115103A
公开(公告)日：1999-01-12
申请号：JP15703497
申请日：1997-06-13
申请人： KAWASAKI STEEL CO
发明人： SEKI HARUHIKO , KONDO KOJI , HIRUTA TOSHIKI , IMAE TOSHIO , YARITA YUKIO
IPC分类号： B21B3/02 , B21B1/26
摘要： PROBLEM TO BE SOLVED: To provide the excellent surface quality steel plate constantly without rough surface by specifying the heating furnace exit side temperature, the rolling reduction of each pass in the rough rolling, the rolling reduction of each stand in the first half of the finish rolling, the rolling speed of the finish last stand. SOLUTION: The slab heated in the heating furnace 1 is roughly rolled by a rough rolling mill 3 with the stands R1 -R3 after the scale is exfoliated in the scale breaker 2. Then it is rolled for finish by the finish rolling mill 4 with the stands F1 -F7 and after passing through the run out table 5, it is rolled around the down coiler 6. In this process, by setting the heating furnace exit side temperature at 1200 deg.C-1300 deg.C, the rolling reduction of each pass in the rough rolling at 35% and under, the rolling reduction of each stand in the first half (F1 -F3 stands) of the finish rolling at 30% and under and the rolling speed of the finish last stand at 700 m/min and up, the optimum rolling condition is obtained and the excellent steel plate surface is obtained constantly.

9. 发明专利

JPH10230311A METHOD FOR CONTROLLING EDGE DROP OF METAL PLATE 失效
公开(公告)号：JPH10230311A
公开(公告)日：1998-09-02
申请号：JP3519897
申请日：1997-02-19
申请人： KAWASAKI STEEL CO
发明人： TATENO JUNICHI , KENMOCHI KAZUHITO , YARITA YUKIO , IMAI HISAO , KANEKO TOSHIHIRO
IPC分类号： B21B37/00 , B21B37/28 , B21B37/42
摘要： PROBLEM TO BE SOLVED: To make edge drop coincide with the target value by feedback control based on the measured amount of edge drop. SOLUTION: This method has constitution by which the edge drop of a material to be rolled is corrected so that the deviation between the amount of edge drop of the material to be rolled which is measured with a profile meter 30 on the outlet side of a rolling mill during rolling and the target amount of edge drop is reduced. In such a case, the rolling mill of a 1st stand is provided with a shift operating device 12 for shifting work rolls 10 which are tapered in the end part on the one side of the roll in the axial direction and cross operating device 14 for crossing the upper and lower work rolls and also, with feedback controller 32, the amount of shift and cross angle are determined as manipulated variables required to correct the edge drop of the material to be rolled and, by respectively outputting these manipulated variables to the operating devices 12, 14 and shifting and crossing the work rolls 10, the metal plate is rolled.

10. 发明专利

JPH06122003A METHOD FOR CONTINUOUSLY HOT ROLLING BILLET 失效
公开(公告)号：JPH06122003A
公开(公告)日：1994-05-06
申请号：JP27436692
申请日：1992-10-13
申请人： KAWASAKI STEEL CO
发明人： FUJII YUSAKU , TAKEBAYASHI KATSUHIRO , ISOBE KUNIO , YARITA YUKIO , YAMAGUCHI TADAMASA , TAKASHIMA NORIO
IPC分类号： B21B1/26 , B21B15/00 , C23F11/00
摘要： PURPOSE:To enable joining over the whole area in the transverse direction in finish rolling and carry out stable continuous hot rolling by applying an oxidation inhibitor on each of cut surfaces of billets just after cutting work and removing the oxidation inhibitor just before finish rolling. CONSTITUTION:The rear end part of a preceding billet 1 and the tip part of the following billet 2 are respectively cut down with a cutting device 4 and, immediately after that, the oxidation inhibitor is applied with a oxidation inhibitor applying device 5. Next, after executing such thickness reducing work that at least both ends in the transverse direction are made into contact in the butt state in the cut surfaces of these billets about at least one side of the rear end part of the preceding billet 1 and the tip part of the following billet 2, both the billets 1, 2 are joined by the combination of heating and pressurizing with a heating/joining device 8, the oxidation inhibitor applied on the unjoined surfaces of the gap is removed by spraying high-pressure water when the preliminarily joined part reaches a device 10 and successively the hot rolling of billet is executed with a finishing mill group 3.

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