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21. 发明专利

JP2004360074A Steel having superhigh heat input welding characteristic 有权
公开(公告)号：JP2004360074A
公开(公告)日：2004-12-24
申请号：JP2004230046
申请日：2004-08-06
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： FUJIWARA TOMOYA , HAMADA MASAHIKO , ICHINOSE TAKESHI , OKAGUCHI HIDEJI
IPC分类号： C21D8/00 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel which has little deterioration in toughness even in high heat input welding, and can contribute to reduction in the operation cost of welded structures.
SOLUTION: The steel has a composition consisting of, by mass, 0.03 to 0.1% C, 0.01 to 0.5% Si, 0.5 to 2% Mn, >0.8 to 2% Cu, 0.005 to 0.025% Ti, 0.002 to 0.008% N, 0.002 to 0.05% sol.Al and ≤0.0035% O (oxygen), and the balance Fe with impurities, wherein the occupation ratio of a ferritic structure in the metallic structure is ≤50%.
COPYRIGHT: (C)2005,JPO&NCIPI

22. 发明专利

JP2002294390A STEEL PLATE HAVING EXCELLENT TOUGHNESS AND PRODUCTION METHOD THEREFOR 失效
公开(公告)号：JP2002294390A
公开(公告)日：2002-10-09
申请号：JP2001095561
申请日：2001-03-29
申请人： SUMITOMO METAL IND
发明人： FUJIWARA TOMOYA , NAGAMICHI TOKIAKI , OKAGUCHI HIDEJI
IPC分类号： C21D8/02 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel plate which has excellent toughness as well as high strength suitable for a steel plate structure, and a production method therefor. SOLUTION: The steel plate having excellent toughness has a composition containing, by mass, >0.03 to 0.15% C, 0.03 to 0.4% Si, 0.6 to 2% Mn, 0.005 to 0.08% Nb, 0.005 to 0.03% Ti,

23. 发明专利

JP2002121640A STEEL SHEET HAVING SUPPRESSING EFFECT ON FATIGUE CRACK PROPAGATION 失效
公开(公告)号：JP2002121640A
公开(公告)日：2002-04-26
申请号：JP2000315146
申请日：2000-10-16
申请人： SUMITOMO METAL IND
发明人： FUJIWARA TOMOYA , YODA NOBORU , OKAGUCHI HIDEJI
IPC分类号： C22C38/00 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel sheet having fatigue crack propagation resistance in the air and in a corrosive environment. SOLUTION: The steel sheet has a chemical composition containing 0.03 to 0.30% C, 0.01 to 0.5% Si, 0.3 to 2.0% Mn and 0.001 to 0.1% sol.Al, and the balance Fe with impurities and has a structure composed of a hard part and a soft part, and in which the ratio of the two parts occupied in the structure and the average hardness by Vickers hardness satisfy fA.Ha-fB.HB>=-3,500; wherein, fA and fB respectively denote the ratios by % unit of the hard part and the soft part occupied in the structure, and HA and HB respectively denote the average hardness by Vickers hardness of the hard part and the soft part.

24. 发明专利

JPH093591A EXTREMELY THICK HIGH TENSILE STRENGTH STEEL PLATE AND ITS PRODUCTION 失效
公开(公告)号：JPH093591A
公开(公告)日：1997-01-07
申请号：JP15567795
申请日：1995-06-22
申请人： SUMITOMO METAL IND
发明人： FUJIWARA TOMOYA , OKAGUCHI HIDEJI
IPC分类号： C21D8/02 , C22C38/00 , C22C38/54
摘要： PURPOSE: To produce an extremely thick high tensile strength steel plate high in the toughness of the base metal and the weld heat affected zone by specifying its compsn. constituted of C, Si, Mn, Ni, Cr, Mo, Nb, B, Ti, Al, N, Cu, V and Fe and its structure. CONSTITUTION: In a steel having a compsn. contg., by weight, 0.02 to 0.15% C, =30% in a recrystallized austenitic region and at >=50% in an unrecrystallized austenitic region, subjecting it to accelerated cooling to

25. 发明专利

JPH06240353A PRODUCTION OF 780MPA CLASS HIGH TENSILE STRENGTH STEEL EXCELLENT IN WELDABILITY AND LOW TEMPERATURE TOUGHNESS 失效
公开(公告)号：JPH06240353A
公开(公告)日：1994-08-30
申请号：JP2663293
申请日：1993-02-16
申请人： SUMITOMO METAL IND
发明人： FUJIWARA TOMOYA , OKAGUCHI HIDEJI
IPC分类号： C21D8/02 , C22C38/00 , C22C38/16 , C22C38/58
摘要： PURPOSE:To provide the method for producing 780MPa class high tensile strength steel excellent in weldability and low temp. toughness. CONSTITUTION:Steel contg. 0.01 to 0.20% C, =50% cumulative draft, and the rolling is completed at the Ar3 point to 900 deg.C. Immediately after that, it is subjected to accelerated cooling to 580 to 300 deg.C, is cooled and is thereafter isothemtally held for 10 to 100sec or is cooled for 10 to 100sec at =two times, and after that, tempering treatment is executed at the Ac1 point or below. The steel may moreover be incorporated with one or more kinds among 0.05 to 1.0% Cr, 0.05 to 1.50% Mo, 0.01 to 0.10% V and 0.0005 to 0.0020% B.

26. 发明专利

JPH06136481A HIGH TENSILE STRENGTH STEEL EXCELLENT IN PLATING CRACK RESISTANCE 失效
公开(公告)号：JPH06136481A
公开(公告)日：1994-05-17
申请号：JP28607692
申请日：1992-10-23
申请人： SUMITOMO METAL IND
发明人： OKAGUCHI HIDEJI
IPC分类号： C22C38/00 , C22C38/14 , C22C38/54 , C22C38/58
摘要： PURPOSE:To make excellent the plating crack resistance of the weld heat- affected zone in high tensile strength steel by specifying the content of Al and O in steel and adding suitable amounts of Ti and N thereto. CONSTITUTION:The compsn. of the high tensile strength steel is constituted of, by weight, 0.01 to 0.20% C,

27. 发明专利

JPH0693332A PRODUCTION OF HIGH TENSILE STRENGTH AND HIGH TOUGHNESS FINE BAINITIC STEEL 失效
公开(公告)号：JPH0693332A
公开(公告)日：1994-04-05
申请号：JP26968892
申请日：1992-09-11
申请人： SUMITOMO METAL IND
发明人： FUJIWARA TOMOYA , OKAGUCHI HIDEJI
IPC分类号： C21D8/02 , C22C38/00 , C22C38/14
摘要： PURPOSE:To produce a thick steel plate having a fine bainitic structure and excellent in weldability and low temp. toughness in a non-heat treating state. CONSTITUTION:Steel stock contg., by weight, 0.01 to 0.20% C, 0.05 to O.6% Si, 0.6 to 2.0% Mn, 0.005 to 0.08% Nb, 0.005 to 0.03% Ti, 0.0005 to 0.0020% B, =50% cumulative draft, and the rolling is completed at the Ar3 paint to 800 deg.C. Immediately, it is subjected to accelerated cooling to 580 to 450 deg.C and is then isothermally held to the temp. range for 10 to 100S or is gradually cooled in the same temp. range for a given time.

28. 发明专利

JPH0543980A HIGH STRENGTH RESISTANCE WELDED TUBE FOR AUTOMOBILE EXCELLENT IN TOUGHNESS IN WELD ZONE 失效
公开(公告)号：JPH0543980A
公开(公告)日：1993-02-23
申请号：JP22645591
申请日：1991-08-12
申请人： SUMITOMO METAL IND
发明人： OKAGUCHI HIDEJI
IPC分类号： C22C38/00 , C22C38/14 , C22C38/54
摘要： PURPOSE:To attain a high strength resistance welded tube for automobile use having sufficient fatigue characteristics even in a resistance welded zone and a joint welded zone and also having high reliability. CONSTITUTION:The resistance welded tube has a composition consisting of 0.06-0.30% C,

29. 发明专利

JPS6320414A PRODUCTION OF HIGH-TOUGHNESS HIGH-TENSILE STEEL PLATE 失效
公开(公告)号：JPS6320414A
公开(公告)日：1988-01-28
申请号：JP16510786
申请日：1986-07-14
申请人： SUMITOMO METAL IND
发明人： OKAGUCHI HIDEJI , HASHIMOTO TAMOTSU
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PURPOSE:To improve the uniformity of the hardness in the thickness direction of a steel plate by heating a specifically composed steel contg. Nb, V or Ti to a prescribed temp. and rough-rolling the steel, then subjecting the rolled steel to primary force cooling and recuperation treatment of the surface layer part under specific conditions. CONSTITUTION:The steel contg., by weight %, 0.02-0.18 C, =1 kinds among Nb, Ti and V, if necessary, contg. >=1 kinds of 0.05-1.00 Cr, Mo and Cu respectively and 0.1-3.0 Ni, and consisting of the balance Fe is prepd. Such steel is heated to 1,050-1,250 deg.C at which the Nb, Ti and V are thoroughly solutionized. The heated steel is roughly rolled and the rolled steel is force-cooled until the surface layer part of the steel plate falls down to the ferrite transformation initiation temp. or below at the time when a suitable plate thickness is attained in the mid-way of rolling. The steel plate is in succession subjected to the recuperation treatment for 30sec-10min to restore the temp. of the above-mentioned surface layer part to the austenite transformation end temp. or above and further, the steel plate is force-cooled down to =4 deg.C/sec cooling rate in the central part of the thickness.

30. 发明专利

JP2011021243A Thick steel plate for low temperature service excellent in arrestability and method of producing the same 有权
标题翻译：适用于低温服务的厚钢板及其生产方法
公开(公告)号：JP2011021243A
公开(公告)日：2011-02-03
申请号：JP2009167565
申请日：2009-07-16
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： FUJIWARA TOMOYA , KAWABATA TOMOYA , KAMO TAKAHIRO , OKAGUCHI HIDEJI , ARIMOCHI KAZUSHIGE
IPC分类号： C22C38/00 , C21D8/02 , C22C38/08 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a thick steel plate for low temperature service which is excellent in arrestability in both L direction and C direction and can suitably be used as raw material for low-temperature storage tank for LNG (liquefied Natural Gas) or the like.
SOLUTION: The thick steel plate for low temperature service excellent in arrestability contains 0.01-0.1% C, 0.03-0.60% Si, 0.3-2.0% Mn, ≤0.005% P, ≤0.003% S, >8.5% to
摘要翻译：要解决的问题：为了提供一种在L方向和C方向上具有优异的阻滞性的低温服务用厚钢板，能够适用于LNG（液化天然气）的低温储罐的原料）等。
解决方案：耐候性优异的厚钢板具有优良的耐蚀性，含有0.01-0.1％C，0.03-0.60％Si，0.3-2.0％Mn，≤0.005％P，≤0.003％S，> 8.5％ 9.5％Ni，0.005-0.050％溶胶。 Al，0.0005-0.0060％N，余量为Fe与杂质，并且在板厚方向的中心部分含有平均粒径为≤25μm，纵横比为0.7-1.3的奥氏体晶粒，并含有 3.0-15.0％的奥氏体按微结构的面积比计。钢可以进一步含有选自Mo，Cu和Cr中的一种或多种元素。版权所有（C）2011，JPO＆INPIT

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