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61. 发明专利

JP2000301205A CONTINUOUS HOT-ROLLING METHOD 失效
公开(公告)号：JP2000301205A
公开(公告)日：2000-10-31
申请号：JP10879199
申请日：1999-04-16
申请人： NIPPON STEEL CORP
发明人： WAKAO MASAMITSU , NAKAMURA TAKAAKI , MATSUO SHINJI
IPC分类号： B21B1/26 , B21B15/00 , B23K26/21 , B23K26/00
摘要： PROBLEM TO BE SOLVED: To eliminate blow-holes in a joined part generated at hot-welding time and to prevent cut-off in a steel material on the way of rolling. SOLUTION: This rolling method is the method, with which plural long steel material for hot-rolling is joined by fusing while running with laser beam in order and continuously rolled. At this time, before fusing with the laser beam and after butting the rear end part of the preceding steel material and the front tip part of the successive steel material, slurry containing carbon is applied or sprayed on the upper surface of the butting part. As the other way, before fusing with the laser beam, the slurry containing carbon is applied or sprayed on the one side or both sides in the range of fusing with the laser beam of the rear end part of the preceding steel material and in this range of the front tip part on the successive steel material.

62. 发明专利

JP2000051908A METHOD FOR PASSING SUCCEEDING ROLLED STOCK ON CONTINUOUS HOT ROLLING LINE 失效
公开(公告)号：JP2000051908A
公开(公告)日：2000-02-22
申请号：JP22913598
申请日：1998-08-13
申请人： NIPPON STEEL CORP
发明人： MATSUO SHINJI , MAEDA KATSUHIRO , ASO YOSUKE
IPC分类号： B21B1/26 , B21B15/00 , B21B39/12
摘要： PROBLEM TO BE SOLVED: To smooth the passage of a succeeding rolled stock through a truck in the case that the rear end of the preceding rolled stock and the tip of the succeeding rolled stock can not be joined due to defective butting between them on a continuous hot rolling line. SOLUTION: In a method in which a truck 8 for joining which freely travels back and forth along the conveying direction of the rolled stock to be rolled with a roughing mill while pushing down elevating/lowering table rolls 9, 16 which interfere with the truck is arranged between the roughing mill and a finishing mill provided on a continuous hot rolling line and by which, after the rear end part of the preceding rolled stock and the tip part of the succeeding rolled stock rolled with the roughing mill are clamped with clamping devices 12, 13 provided on the truck 8 for joining and butted, the butted part is joined with a joining machine provided on the truck 8 for joining, in the case that the butted state of the rear end of the preceding rolled stock with the tip of the succeeding rolled stock at the time of clamping and butting them with the clamping devices 12, 13 is defective, the clamps of the clamping devices 12, 13 are released and also, after elevating and lowering the elevating/ lowering table roll 16 in front of the truck 8 for joining, the succeeding rolled stock is passed through the elevating/lowering table roll 16 which is elevated and lowered.

63. 发明专利

JPH10225706A METHOD FOR JUDGING RUNNING JOINED CONDITION, RUNNING JOINING METHOD AND RUNNING JOINING EQUIPMENT 失效
公开(公告)号：JPH10225706A
公开(公告)日：1998-08-25
申请号：JP3175597
申请日：1997-02-17
申请人： NIPPON STEEL CORP
发明人： MATSUO SHINJI , MAEDA KATSUHIRO , ASO YOSUKE , NAKAMURA TAKAAKI , TOKIDA HIROSHI , TANAKA KEIJI
IPC分类号： B21B15/00 , B21B1/26 , B23K31/00 , B23K37/04
摘要： PROBLEM TO BE SOLVED: To easily and precisely judge the joined condition and to enable the performance of smooth rolling operation by stretching the joined part with stretching stress corresponding to a load at the rolling time in the step before rolling and judging the joined condition with the stretch displacement quantity or the stretching stress. SOLUTION: After welding the rear end surface of a preceding steel material 1a and the front end surface of a succeeding steel material 1b with a welder 8, a clamp device 7b is shifted with a hydraulic cylinder 14 and the joined part is stretched with the setting load. The joined part is extended and the distance between the clamp devices 7a, 7b, is changed. This stretch displacement quantity is measured with a displacement detecting sensor and compared with a a displacement quantity which does not develop the breakage at the joined part in the preset rolling process, with an arithmetic device and it is judged whether the joined condition is acceplable or not. This judging result of the acceptance can be transmitted with a displaying device and an alarming device, and the necessary treatment can be executed.

64. 发明专利

JPH09295011A METHOD FOR JOINING END FACE OF STEEL PLATE 失效
公开(公告)号：JPH09295011A
公开(公告)日：1997-11-18
申请号：JP13413196
申请日：1996-05-02
申请人： NIPPON STEEL CORP
发明人： KUBOYAMA EIICHI , MATSUO SHINJI
IPC分类号： B21B45/02 , B21B1/26 , B21B15/00 , B23K26/21 , B23K31/00 , B23K26/00
摘要： PROBLEM TO BE SOLVED: To prevent the outflow of the molten metal from an edge part in welding the edge part of a rough bar by blowing the cooling gas to the edge part to be welded of the rough bar. SOLUTION: Unless the welding quantity of >=40% of the total thickness is secured in welding an edge part 5, the welding force can not be secured by the tensile stress during the rolling by a finish mill, and the welding of preceding and succeeding rough bars can not be maintained, and the rough bar is broken with the part as a starting point. The welding starting point is set inside of the edge part of the rough bar, the welding of the metal is advanced to the edge part, and in order to secure the welding force through solidification of the molten metal, the cooling gas is blown toward the edge part 5 diagonally from the upper part in the vicinity of the edge part of the rough bar to prevent outflow and dropping of the molten metal. Thus, the welded part is not broken to realize the completely continuous rolling.

65. 发明专利

JPH09220679A CONTINUOUS HOT-ROLLING METHOD 失效
公开(公告)号：JPH09220679A
公开(公告)日：1997-08-26
申请号：JP6748796
申请日：1996-02-29
申请人： NIPPON STEEL CORP
发明人： MATSUO SHINJI , MAEDA KATSUHIRO , NAKAMURA TAKAAKI , TOKIDA HIROSHI , WAKAO MASAMITSU , MINAMIDA KATSUHIRO
IPC分类号： B21B15/00 , B21B1/26 , B23K20/00 , C21D9/50
摘要： PROBLEM TO BE SOLVED: To stably execute the rolling without causing cutting off of a steel material from the joined part during rolling. SOLUTION: In the method of a continuous hot-rolling after joining plural steel materials, at the time of butting, heating and joining the rear end part of the following steel material and the front end part of the preceding steel material, the temp. at the joined part and near part thereof after completing the joining is controlled in the temp. range of the following equation for >=30sec, and thereafter, the hot-rolling is executed Ar3 transformation temp.

66. 发明专利

JPH09174109A CONTINUOUS HOT ROLLING METHOD 失效
公开(公告)号：JPH09174109A
公开(公告)日：1997-07-08
申请号：JP35116695
申请日：1995-12-27
申请人： NIPPON STEEL CORP
发明人： MATSUO SHINJI , MAEDA KATSUHIRO , NAKAMURA TAKAAKI , TOKIDA HIROSHI , WAKAO MASAMITSU , MINAMIDA KATSUHIRO
IPC分类号： B21B15/00 , B21B1/26 , B23K31/00
摘要： PROBLEM TO BE SOLVED: To prevent a steel from being cut away during rolling by butting the rear end of an advance steel and the force end of a following steel, heating a joining part and the neighborhood to the temperature lower than an MnS melting temperature and heat-joining the joining part. SOLUTION: When a joining part is cooled, a molten S is not precipitated as MnS, it exists in the molten state, it thickens on the grain boundary face of a steel structure and the quality of material is made brittle. When the ratio of the highest temperature at the joining time and the MnS melting temperature is made higher than 1, the contraction value of area is made lower than 45%, it is made lower than the contraction value of area for requiring rolling and the danger of being cut away is caused. Accordingly, in order to roll in the stable state without causing breaking of the joining part, the ratio of the highest temperature and the MnS melting temperature is required lower than 1. That is, that the highest temperature of the joining part and the neighborhood (a part within 10mm from the joining part) is made lower than the MnS melting temperature is the necessary condition. The reduction in strength caused by the S brittleness is prevented, and the stable and continuous hot finish rolling is executed.

67. 发明专利

JPH08300002A CONTINUOUS HOT ROLLING METHOD 失效
公开(公告)号：JPH08300002A
公开(公告)日：1996-11-19
申请号：JP13117495
申请日：1995-05-02
申请人： NIPPON STEEL CORP
发明人： MATSUO SHINJI , MAEDA KATSUHIRO , ARISUMI SEIJI , MINAMIDA KATSUHIRO , OBARA MASAHIRO , KATO DAIKI
IPC分类号： B21B15/00 , B21B1/26 , B23K26/21 , B23K35/30 , B23K35/36 , B23K26/00
摘要： PURPOSE: To stably execute continuous hot finish rolling without lowering strength because blow holes are not generated in a butt-joined part between the rear end of a preceding steel and the front end of the succeeding steel. CONSTITUTION: In a method in which hot rolling is continuously executed by successively joining plural long size steels for hot hot rolling, the rear end of the preceding steel and the front end of the succeeding steel are butted and, at the time of joining them by melting them in running with a laser beam while supplying an iron alloy wire filler 50 contg. one or more kinds of Al, Ti and Si to this butted part, after joining them by supplying the wire filler 50 under the conditions within a specified range, hot rolling is executed.

68. 发明专利

JPH08245465A BISPHENOLS FOR POLYMER RAW MATERIAL AND PRODUCTION THEREOF 失效
公开(公告)号：JPH08245465A
公开(公告)日：1996-09-24
申请号：JP5742895
申请日：1995-03-16
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP
发明人： FURUKAWA TOSHIHIKO , YONETANI KIICHI , SUGIYAMA YOSHIO , MATSUO SHINJI , SAKURA KATSUHIKO
IPC分类号： C07C37/88 , C07C39/15 , C07C39/16 , C07C45/86 , C07C49/83 , C07C315/06 , C07C317/22 , C07C319/26 , C07C323/20 , C08G59/02 , C08G59/06 , C08G63/195 , C08G63/199 , C08G64/00 , C08G64/04 , C08G65/38 , C08G65/44 , C09K15/08 , C09K15/14
摘要： PURPOSE: To obtain a bisphenol for polymers, capable of minimizing yellowing in polymerization or molding process by adding a specific amount of a specific phenol to 4,4'-bisphenol. CONSTITUTION: This bisphenol comprises 4,4'-bisphenol of formula I (X is a difunctional group) (such as; bisphenol-A) containing 50-100000ppm(wt) of phenol selected from 2,4'-bisphenols of formula II (such as; 2,4'-bisphenol-A), trisphenols of formula III and alkyl substituted 4,4'-bisphenols of formula IV (R,R' are each an alkyl of more than IC; n is 0,1) (such as 3-methylbisphenol-A). When the total content of bisphenols of the formula II-IV is less than 50ppm(wt) in 4,4'-bisphenol, 4,4'-bisphenol containing a large amount of above-noted bisphenols is used.

69. 发明专利

JPH0871707A COATING BELT FOR BELT TYPE CONTINUOUS CASTER 失效
公开(公告)号：JPH0871707A
公开(公告)日：1996-03-19
申请号：JP21583694
申请日：1994-09-09
申请人： NIPPON STEEL CORP
发明人： TANNO HITOSHI , MATSUO SHINJI , KOMORI TOSHIYA , SAITO TATSUKI , NAKAMURA SHIYUUJI
IPC分类号： B22D11/04 , B22D11/059 , B22D11/06
摘要： PURPOSE: To prevent peeling of heat insulating layer and sticking of fusion coating material to heat insulating layer. CONSTITUTION: In the coating belt for belt type continuous caster, in which a heat insulating layer and fusion coating layer are formed on a metal mode belt main body, the belt main body consists of a cooling side belt main body 1 and molten steel side belt main body 2, a heat insulating layer 3 is formed between the cooling side belt main body 1 and molten steel side belt main body 2 as closely adhered, further, a fusion coating layer 4 is formed on the surface of molten steel side of molten steel side belt main body 2. Peeling of the heat insulating layer 3 from the cooling side main belt and sticking of a fusion coating material to the heat insulating layer are prevented. As a result, heat extracting by mold is uniformly kept in long term, a thin cast slab is can be produced.

70. 发明专利

JPH07214249A BELT FOR BELT TYPE CONTINUOUS CASTING AND FORMATION OF BELT FILM 失效
公开(公告)号：JPH07214249A
公开(公告)日：1995-08-15
申请号：JP722994
申请日：1994-01-26
申请人： NIPPON STEEL CORP
发明人： SAITO TATSUKI , TANNO HITOSHI , KANAI NORIYUKI , ISHIKAWA ATSUSHI , MISUMI HIDEYUKI , MATSUO SHINJI
IPC分类号： B22D11/06 , C04B35/52 , C04B35/583
摘要： PURPOSE:To obtain a slab having good surface characteristics by uniformly growing a solidified shell in the case of continuous casting of the thin slab by a belt type continuous casting machine. CONSTITUTION:This belt for the belt type continuous casting machine is produced by forming an adhesive film 2a of an inorg. system consisting of an alumina-silica material on the working side surface of a metallic belt, forming a lubricative film 2b of an inorg. system consisting of a graphite-based material, silica-based material or BN-based material on this adhesive film 2a, thereby forming an inorg. film having a total film thickness of 80 to 200mum.

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