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1. 发明专利

JPH0313524A PRODUCTION OF THICK HIGH-TOUGHNESS HIGH TENSILE STEEL PLATE HAVING EXCELLENT TOUGHNESS ON STEEL PLATE SURFACE AND IN CENTRAL PART OF THICKNESS 失效
公开(公告)号：JPH0313524A
公开(公告)日：1991-01-22
申请号：JP14736689
申请日：1989-06-10
申请人： KOBE STEEL LTD
发明人： TAKASHIMA NOBUTSUGU , SHIMIZU MASATO , ABE KENGO
IPC分类号： C21D8/02 , C22C38/00 , C22C38/14
摘要： PURPOSE:To produce the thick high-toughness high tensile steel plate having the excellent low-temp. toughness in the central part of the thickness and the surface part of the steel plate by subjecting a steel stock having a specific compsn. to a water cooling at a specific cooling rate between a rough rolling and finish rolling at the time of producing the thick steel plate by subjecting the above-mentioned steel stock to the hot rough rolling, finish rolling and cooling. CONSTITUTION:The slab of a low-carbon steel contg., by weight, 0.01 to 0.10% C, 0.10 to 0.50% Si, 0.5 to 2.0% Mn, =1 kind of =50mm thickness at >30% rolling reduction in the temp. range of (Ar3 to 50 deg.C) to (Ar3 to 10 deg.C) steel plate surface temp. to >=(Ar3 to 50 deg.C) steel plate surface temp. and is then cooled down to =1 times of the water cooling treatment at the cooling rate CR( deg.C/ sec) expressed by inequation between the rough rolling and the finish rolling.

2. 发明专利

JPH09194934A COOLING METHOD FOR STEEL PLATE FOR UNIFORMIZING QUALITY 失效
公开(公告)号：JPH09194934A
公开(公告)日：1997-07-29
申请号：JP840196
申请日：1996-01-22
申请人： KOBE STEEL LTD
发明人： TANI NORITAKA , SUDO MASAKI , FUJINO TAKANARI , SUGA TOSHIAKI , SHIBATA MITSUAKI , ABE KENGO
IPC分类号： B21B45/02 , B21D1/00 , C21D8/02
摘要： PROBLEM TO BE SOLVED: To provide a cooling method for a steel plate, capable of reducing the occurrence of uneven cooling due to temp. deviation and inferior degree of flatness, uniformizing the quality in the steel plate, and securing superior degree of flatness, by straightening a hot rolled steel plate before cooling. SOLUTION: At the time of producing a steel plate by using hot rolling equipment having a cooling device and a straightening device on the rear side of a rolling mill, the quality is uniformized by straightening a hot rolled steel plate by means of the straightening device into flat state and then cooling it by means of the cooling device, in this cooling method for steel plate. Further, in this steel plate cooling method for uniformizing quality, hot rolling completion temp. is regulated o >=800 deg.C and cooling is started from a temp. not lower than the Ar3 transformation point after 1-3min from the completion of hot rolling and stopped at a temp. not higher than the bainitic transformation completion temp., and, after further cooling, the steel plate is straightened again by means of the straightening device into flat state.

3. 发明专利

JPH02166227A MANUFACTURE OF HIGH STRENGTH AND HIGH TOUGHNESS THICK STEEL PLATE HAVING EXCELLENT WELDABILITY 失效
公开(公告)号：JPH02166227A
公开(公告)日：1990-06-26
申请号：JP32179788
申请日：1988-12-19
申请人： KOBE STEEL LTD
发明人： TAKASHIMA NOBUTSUGU , SHIMIZU MASATO , ABE KENGO , IKEDA MITSURU
IPC分类号： C21D8/02 , C22C38/00 , C22C38/14
摘要： PURPOSE:To manufacture the steel plate by heating a steel slab contg. small amounts of specific alloy components to a specific temp., thereafter subjecting it to rolling under limited conditions and immediately to hardening and tempering treatment. CONSTITUTION:A steel slab contg., by weight, 0.01 to 0.10% C, 0.10 to 0.50% Si, 0.5 to 2.0% Mn, 0.01 to 0.10% Al, 0.8 to 1.5% Cu, 0.01 to 0.06% Nb, 0.005 to 0.020% Ti and =1100 deg.C at which Nb enters a solid solution sufficiently, is immediately rolled down not until the temp. range where the temp. of the surface of the slab comes to 850 to 1000 deg.C and is cooled at >=20 deg.C/sec cooling speed. Then, the slab is rolled at 60% draft and finish rolling is ended at the temp. of >=Ar3-30 deg.C; the slab is immediately subjected to direct hardening and is thereafter tempered, by which the high strength and high toughness thick steel plate of >=35mm thickness having excellent weldability can be manufactured.

4. 发明专利

JPH0196351A MANUFACTURE OF STEEL MATERIAL HAVING EXCELLENT WELDED JOINT TOUGHNESS 失效
公开(公告)号：JPH0196351A
公开(公告)日：1989-04-14
申请号：JP25405087
申请日：1987-10-08
申请人： KOBE STEEL LTD
发明人： TAKIZAWA KENSABURO , KAJI HARUO , TAKASHIMA NOBUTSUGU , ABE KENGO , SHIMIZU MASATO
IPC分类号： C22C33/04 , C21C7/06
摘要： PURPOSE:To manufacture the title steel material having specific compsn. by subjecting a steel to C deoxidation into the specific dissolved oxygen amt. at the time of steel manufacture and thereafter adding specific amounts of Ti thereto and melting the steel not to manufacture the primary deoxidized product of Ti and casting the same. CONSTITUTION:The steel material contg., by weight, 0.01-0.20% C,

5. 发明专利

JPH10121191A 590N/MM2 CLASS STEEL PLATE FOR WELDED STRUCTURE, EXCELLENT IN TOUGHNESS IN HAZ AT LARGE HEAT INPUT WELDING AND HAVING <=80% YIELD RATIO, AND ITS PRODUCTION 失效
公开(公告)号：JPH10121191A
公开(公告)日：1998-05-12
申请号：JP27807996
申请日：1996-10-21
申请人： KOBE STEEL LTD
发明人： HAMANAKA TAKAMICHI , HOSOYA TAKASHI , ABE KENGO , IZUMI MANABU
IPC分类号： C21D8/02 , C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To secure toughness in an HAZ(heat-affected zone) by subjecting a steel slab of specific composition to hot rolling and to accelerated cooling under respectively specified conditions. SOLUTION: A steel slab, having a composition which consists of, by mass, 0.10-0.16% C, =850 deg.C rolling temp. Subsequently, cooling is performed from a temp. not lower than the Ar1 point down to =30kj/mm amount of weld heat input is regulated to >=47J by 0 deg.C Charpy absorption energy, is prepared. By this method, the 590N/mm class steel plate for welded structure, excellent in toughness in HAZ at the time of large heat input welding and having

6. 发明专利

JPH08243615A METHOD FOR CONTROLLING NOSE CAMBER IN HOT ROLLING 失效
公开(公告)号：JPH08243615A
公开(公告)日：1996-09-24
申请号：JP4857795
申请日：1995-03-08
申请人： KOBE STEEL LTD
发明人： UEDA HIROTSUGU , OE KENICHI , SUDO MASAKI , ABE KENGO
IPC分类号： B21B37/00 , B21B37/28 , B21B37/32 , C21D9/00 , C21D11/00
摘要： PURPOSE: To independently control the amount of nose camber into the target value and, even when there are a restriction from the viewpoint of the material of a rolled stock, restriction from the viewpoint of equipment, restriction from the viewpoint of operation, or the like in a finish rolling stage, to minimize the amount of nose camber at the time of completing rolling by jointly using with other camber control within the range of these restrictions. CONSTITUTION: In hot rolling in which a slab is heated in a heating furnace and a plate is manufactured by executing rough rolling and finish rolling, the amount of nose camber which is generated at the time of finish rolling is preliminarily determined based on operation data as a functional equation respectively taking difference between set temps. in upper and lower parts and residence time of the slab in the heating zone and soaking zone of the heating furnace as variables. About the rolled stock of an object, by applying the predetermined residence time of the slab in the heating furnace and target amount of nose camber to the functional equation, the respective difference between the set temps. in the upper and lower parts in the heating zone and soaking zone of the heating furnace is determined and set so that the amount of nose camber which is generated at the time of rolling becomes the target value.

7. 发明专利

JPH02179820A PRODUCTION OF CU DEPOSITION-TYPE THICK HIGH-STRENGTH STEEL PLATE HAVING UNIFORM STRENGTH IN ITS THICKNESS DIRECTION 失效
公开(公告)号：JPH02179820A
公开(公告)日：1990-07-12
申请号：JP33257688
申请日：1988-12-30
申请人： KOBE STEEL LTD
发明人： TAKASHIMA NOBUTSUGU , SHIMIZU MASATO , ABE KENGO
IPC分类号： C21D8/02 , C22C38/00 , C22C38/16
摘要： PURPOSE:To obtain the Cu deposition-type thick high-strength steel plate having high strength and excellent low-temp. toughness and weldability by inserting a steel plate contg. constituent elements in addition to Cu into a heat-treating furnace kept at a specified temp., imparting a temp. difference between the center of thickness and surface, and heating the plate to a temp. not exceeding Ac2. CONSTITUTION:A steel contg. 0.01-0.10% C, 0.10-0.50% Si, 0.50-2.00% Mn, 0.80-1.50% Cu, and 0.1-1.0% Al is control-rolled, and then directly hardened to prepare a steel plate. The plate is then inserted into a heat-treatment furnace kept at 700-1000 deg.C, a temp. difference of >=50 deg.C is imparted between the surface and the center of thickness when the temp. of the center of the plate reaches 500-600 deg.C, and the plate is extracted from the furnace. In this case, the surface temp. has to be controlled to a temp. lower than the Ac2. By this method, a Cu deposition-type thick high-strength steel plate having especially >=35mm thickness, with a less strength difference in its thickness direction as well as the above-mentioned characteristics, and having excellent workability is obtained.

8. 发明专利

JPH0215122A PRODUCTION OF HIGH STRENGTH AND HIGH TOUGHNESS THICK STEEL PLATE HAVING EXCELLENT WELDABILITY 失效
公开(公告)号：JPH0215122A
公开(公告)日：1990-01-18
申请号：JP16651788
申请日：1988-07-04
申请人： KOBE STEEL LTD
发明人： TAKIZAWA KENSABURO , KAJI HARUO , SHIMIZU MASATO , ABE KENGO
IPC分类号： C21D8/02 , C22C38/00 , C22C38/16 , C22C38/54
摘要： PURPOSE:To produce titled steel plate by interrupting rolling to the steel specifying the chemical component at the specific temp. range in rougher rolling, cooling at high speed during this and further, quenching and tempering immediately after finish rolling under the specific condition. CONSTITUTION:The hot-rolling is executed after heating at 1000-1150 deg.C to the steel composed of 0.01-0.10wt.% C, 0.10-0.50% Si, 0.5-2.0% Mn, 0.01-0.10% Al, 0.8-1.5% Cu, 0.01-0.06% Nb, 0.005-0.020% Ti, =12 deg.C/min cooling speed on the slab surface temp. during this. After that, the rolling reduction is applied to >=60% at 800-700 deg.C in the fish rolling and the rolling is completed at >=(Ar3 transforming point -30 deg.C) and immediately the direct quenching is executed and further, the tempering treatment is executed and the title steel plate having >=3.5mm thickness is obtd.

9. 发明专利

JP2000330620A MANUFACTURE CONDITION DETERMINING DEVICE 失效
公开(公告)号：JP2000330620A
公开(公告)日：2000-11-30
申请号：JP13507499
申请日：1999-05-17
申请人： KOBE STEEL LTD
发明人： WATANABE TOSHIHIKO , ABE KENGO , HIGUCHI KOICHI
IPC分类号： G05B19/418 , G06Q50/00 , G06Q50/04 , G06F17/60
摘要： PROBLEM TO BE SOLVED: To generate adequate manufacture conditions by replacing manufacture conditions of an existent design instance with manufacture conditions of a stored candidate instance when the design instance is already present in an instance base and registering the stored candidate instance in the instanced base as a new design instance when the design instance is not present. SOLUTION: As for an industrial material manufactured by rolling, forging, extrusion, casting, etc. by using a request specification input part 1, request specifications that a requester sends out are inputted. The inputted request specifications are compared by a request specification matching part 3 with request specifications of design instances stored in the instance base 2. As the compared result, when the design instance is present in the instance base 2, a consistency decision part 7 replaces the manufacture conditions of the existent design instance with the manufacture conditions of the stored candidate instance and when the design instance is not present in the instance base 2, the stored candidate instance is registered as a new design instance in the instance base 2.

10. 发明专利

JPH05331538A MANUFACTURE OF THICK HIGH TOUGHNESS AND HIGH TENSILE STRENGTH STEEL PLATE EXCELLENT IN TOUGHNESS ON CENTRAL PART OF PLATE THICKNESS 失效
公开(公告)号：JPH05331538A
公开(公告)日：1993-12-14
申请号：JP16535292
申请日：1992-06-01
申请人： KOBE STEEL LTD
发明人： SHIMIZU MASATO , KOBAYASHI YOICHIRO , ABE KENGO
IPC分类号： C21D8/02 , C22C38/00 , C22C38/14
摘要： PURPOSE:To manufacture an objective thick high toughness and high tensile strength steel plate excellent in low temp. toughness by subjecting steel having a specified componental compsn. to a rough rolling and a finish rolling in specified conditions, immediately cooling it in specified conditions and controlling the conditions of rolling into specified ones. CONSTITUTION:The component compen. of steel is constituted of, by weight, 0.01 to 0.10% C, 0.003 to 0.03% Nb, 0.005 to 0.02% Ti and 0.0020 to 0.0060% N, and the balance Fe. The steel is heated to >= Ac3 to 1000 deg.C and is subjected to rough rolling at >=20% draft in such a manner that the temp. on the central part of the plate is regulated to 850 to 900 deg.C. Thereafter, finish rolling is executed at >=30% draft in such a manner that the temp. on the central part of the plate is regulated to >= Ar3 to 800 deg.C. Immedeately, cooling is executed at 1 to 10 deg.C/Aec so that the temp. on the surface of the steel plate arrives at

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