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21. 发明专利

JPH0317233A MANUFACTURE OF COLD ROLLED STEEL SHEET FOR DEEP DRAWING BY STRIP CASTING 失效
公开(公告)号：JPH0317233A
公开(公告)日：1991-01-25
申请号：JP15127889
申请日：1989-06-14
申请人： KOBE STEEL LTD
发明人： SHIRASAWA HIDENORI , IWAI TAKAFUSA , OMIYA YOSHINOBU
IPC分类号： B21D22/20 , B22D11/06 , B22D11/124 , C21D8/04 , C21D9/48 , C22C38/00 , C22C38/14
摘要： PURPOSE:To manufacture the cold rolled steel sheet having excellent deep drawability by subjecting a thin cast steel strip contg. specified ratios of C, Mn, N, Ti and Nb to continuous casting, cooling it under specified conditions and executing cold rolling and recrystallization annealing. CONSTITUTION:A thin cast steel strip contg., by weight, 0.001 to 0.01% C, 0.10 to 0.30% Mn and >=0.005% N, contg. at least one kind of elements selected from 0.02 to 0.10% Ti and 0.02 to 0.05% Nb so as to satisfy, by weight, Ti*/C*>=4.0 [Ti*=Ti+(48/93)Nb(wt.%) and C*=C+(12/14)N(wt.%)] and the balance iron with inevitable impurities is subjected to continuous casting. Next, the cast steel strip is cooled so that the average cooling rate from Ar3 to Ar1 is regulated to

22. 发明专利

JP2005281787A High strength cold rolled steel sheet having excellent adhesion of coating film and workability 有权
标题翻译：高强度冷轧钢板，具有优异的涂膜和粘合性
公开(公告)号：JP2005281787A
公开(公告)日：2005-10-13
申请号：JP2004098520
申请日：2004-03-30
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： OMIYA YOSHINOBU , KAMITSUMA SHINJI , KAMURA MANABU , HASHIMOTO IKUO , NOMURA MASAHIRO
IPC分类号： C22C38/00 , C22C38/06
摘要： PROBLEM TO BE SOLVED: To provide a high strength cold rolled steel sheet having adhesion of a coating film and workability, and having a tensile strength of ≥550 MPa.
SOLUTION: The cold rolled steel sheet is composed of a steel sheet with a composite structure satisfying a prescribed composition and containing prescribed amounts of ferrite, bainite and retained austenite. In the surface of the steel sheet, (I) Mn-Si multiple oxides with a major axis of 0.01 to 5 μm in which the atomic ratio between Mn and Si (Mn/Si) is ≥0.5 are present by ≥10 pieces/100 μm
2 , and further, the coating ratio of oxides consisting mainly of Si to the surface of the steel sheet is ≤10%, and/or (II), when the cross-sections near the surface of the steel sheet are observed by 2,000 magnifications using an SEM (Scanning Electron Microscope), in optional 10 fields, cracks with a width of ≤3 μm and a depth of ≥5 μm are not present.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种具有涂膜粘附性和加工性，并且拉伸强度≥550MPa的高强度冷轧钢板。解决方案：冷轧钢板由具有规定组成的复合结构的钢板构成，含有规定量的铁素体，贝氏体和残余奥氏体。在钢板表面，Mn（Si / Si）的原子比≥0.5的长轴为0.01〜5μm的（I）Mn-Si多重氧化物存在≥10个/ 100个另外，主要由Si构成的氧化物与钢板的表面的比例为≤10％，和/或（II），当表面附近的截面为使用SEM（扫描电子显微镜），在可选的10个场中观察2000张放大倍率的钢板，不存在宽度≤3μm，深度≥5μm的裂纹。版权所有（C）2006，JPO＆NCIPI

23. 发明专利

JPH11350063A HIGH STRENGTH STEEL SHEET EXCELLENT IN SHAPE FIXABILITY AND IMPACT RESISTANCE AND ITS PRODUCTION 失效
公开(公告)号：JPH11350063A
公开(公告)日：1999-12-21
申请号：JP15888398
申请日：1998-06-08
申请人： KOBE STEEL LTD
发明人： OMIYA YOSHINOBU , TAMURA YUKIAKI
IPC分类号： C21D9/46 , C22C38/00 , C22C38/06 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To produce a high strength steel sheet excellent in press workability and impact energy absorbability and furthermore excellent in shape fixability at the time of press working and to provide a method for producing it. SOLUTION: This high strength steel sheet is the one having a compsn. contg., by mass, 0.05 to 0.25% C, =50 N/mm baking hardening quantity.

24. 发明专利

JPH07197183A ULTRA-HIGH STRENGTH THIN STEEL SHEET WITHOUT DEVELOPING HYDROGEN BRITTLENESS AND ITS PRODUCTION 失效
公开(公告)号：JPH07197183A
公开(公告)日：1995-08-01
申请号：JP35210293
申请日：1993-12-29
申请人： KOBE STEEL LTD
发明人： TANAKA FUKUTERU , MIMURA KAZUHIRO , OMIYA YOSHINOBU
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/06
摘要： PURPOSE:To obtain an ultra-high strength thin steel by making number of Fe-Cr series precipitation having a specific size or larger to a specific value or lower, in the ultra-high strength thin steel sheet having specific composition and martensite containing ratio. CONSTITUTION:The steel containing, by wt.%, 0.05-0.25C, 1.0-3.0 Mn, 0.025-0.100 Al, =5 deg.C/sec cooling rate and, thereafter, reheating to =980N/mm tensile strength and containing >=70% martensite by vol. ratio and /mm Fe-Cr series precipitates having >=0.1mum size of precipitates is obtd.

25. 发明专利

JPH07124758A ELECTRIC RESISTANCE WELDED TUBE FOR DOOR REINFORCING MEMBER EXCELLENT IN DELAYED FRACTURE RESISTANCE 失效
公开(公告)号：JPH07124758A
公开(公告)日：1995-05-16
申请号：JP25852193
申请日：1993-10-15
申请人： KOBE STEEL LTD
发明人： WATANABE KENICHI , MIYAHARA MOTOYUKI , TANAKA FUKUTERU , OMIYA YOSHINOBU
IPC分类号： B62D29/00 , B23K13/00 , B23K26/00 , B23K31/00 , B62D25/02
摘要： PURPOSE:To provide an electric resistance welded tube for door reinforcing member with reducing residual stress and excellent in delayed fracture resistance. CONSTITUTION:The outer periphery of the electric resistance welded tube made from a steel sheet having 1180N/mm tensile strength is irradiated with a high energy beam in the longitudinal direction and in linear way, making penetration up to a depth DELTA of >=1/3 of thickness. By this method, the electric resistance welded tube for door reinforcing member is obtained with reducing residual stress and excellent in delayed fracture resistance.

26. 发明专利

JPH06264149A PRODUCTION OF HIGH STRENGTH GALVANNEALED STEEL SHEET FOR DEEP DRAWING, HAVING BAKING HARDENABILITY 失效
公开(公告)号：JPH06264149A
公开(公告)日：1994-09-20
申请号：JP7615093
申请日：1993-03-09
申请人： KOBE STEEL LTD
发明人： MIYAHARA MOTOYUKI , OMIYA YOSHINOBU
IPC分类号： C21D8/04 , C21D9/48 , C22C38/00 , C22C38/12 , C22C38/14 , C23C2/06 , C23C2/28
摘要： PURPOSE:To produce a high strength galvannealed steel sheet for deep drawing, excellent in tensile strength, particularly in deep drawability, causing no powdering at the time of press forming, excellent in adhesion, and having baking hardenability. CONSTITUTION:A steel, which has a composition consisting of, by weight, 0.0005-0.004% C, =500 deg.C to precipitate Cu. Then, pickling and cold rolling are done. The resulting steel sheet is annealed at a temp. between the recrystallization temp. and the Ar3 transformation point, hot-dip-galvanized, and subjected to galvannealing treatment.

27. 发明专利

JPH06158172A PRODUCTION OF HOT-DIP GALVANIZED ALLOYED STEEL SHEET EXCELLENT IN PRESS FORMABILITY 失效
公开(公告)号：JPH06158172A
公开(公告)日：1994-06-07
申请号：JP33984392
申请日：1992-11-25
申请人： KOBE STEEL LTD
发明人： MIYAHARA MOTOYUKI , OMIYA YOSHINOBU
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/14 , C23C2/02 , C23C2/06 , C23C2/28
摘要： PURPOSE:To produce a galvanized alloyed steel sheet good in press formability and adhesion by subjecting steel having a specified componental compsn. to hot rolling and cold rolling under specified conditions, thereafter subjecting it to continuous annealing at a specified temp., subsequently immersing it in a hot-dip zinc bath and thereafter executing alloying treatment. CONSTITUTION:Steel is constituted of a compsn. contg., by weight, =30 deg.C/sec and is coiled at >=650 deg.C. It is subjected to pickling and >=60% cold rolling, is thereafter subjected to continuous annealing at 800 deg.C to the AC3 point for

28. 发明专利

JPH05302125A 失效
公开(公告)号：JPH05302125A
公开(公告)日：1993-11-16
申请号：JP11397592
申请日：1992-04-06
申请人： KOBE STEEL LTD
发明人： NAMITA YOSHIHARU , OMIYA YOSHINOBU , URAI MASAAKI
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/14 , C23C2/06
摘要： PURPOSE:To manufacture a baking hardened high strength hot dip galvannealed steel sheet excellent in plating adhesion and to manufacture a steel sheet for plating for obtaining the plated steel sheet. CONSTITUTION:At the time of subjecting steel contg., by weight, 0.0005 to 0.004% C, = the Ar3 transformation point (the Ar3 transformation point + 100 deg.C), and then, it is coiled at >=600 deg.C and is thereafter subjected to pickling and cold rolling. The steel sheet for plating obtd. by this method is annealed at the recrystallization temp. or above, is thereafter applied with hot dip plating by using a hot dip galvanizing bath in which the content of Al is regulated so as to satisfy prescribed conditions and is thereafter subjected to alloying treatment.

29. 发明专利

JPH02190426A MANUFACTURE OF COLD ROLLED STEEL SHEET HAVING EXCELLENT WORKABILITY 失效
公开(公告)号：JPH02190426A
公开(公告)日：1990-07-26
申请号：JP922389
申请日：1989-01-17
申请人： KOBE STEEL LTD
发明人： SHIRASAWA HIDENORI , IWAI TAKAFUSA , OMIYA YOSHINOBU , HASE AKIRA , KITA MUNEKI
IPC分类号： C21D9/663 , C22C38/00 , C22C38/06
摘要： PURPOSE:To manufacture the cold rolled steel sheet having excellent surface quality and workability by coiling a cold rolled steel sheet having specific compsn. constituted of C, Si, Mn, P, Al and Fe into a loose coil via a spacer and subjecting the sheet to specific box annealing. CONSTITUTION:A steel constituted of, by weight, 0.03 to 0.07% C, =2.5mm is preferably used. Furthermore, in the case of above box annealing, gas cleaning is executed by blowing steam into an atmospheric gas at the time of raising the temp. and the gas cleaning is finished at the time when the coiling temp. reaches the range of 350 to 500 deg.C. In this way, the formation of carbide and a carbon stain on the surface are prevented, by which the steel sheet having excellent surface quality and workability can be obtd.

30. 发明专利

JPH0285321A PRODUCTION OF THIN T BAR 失效
公开(公告)号：JPH0285321A
公开(公告)日：1990-03-26
申请号：JP23599088
申请日：1988-09-20
申请人： KOBE STEEL LTD
发明人： SHIRASAWA HIDENORI , TANAKA FUKUTERU , OMIYA YOSHINOBU
IPC分类号： C21D8/02 , C21D9/46 , C21D9/56 , C22C38/00 , C22C38/04
摘要： PURPOSE:To produce the title lightweight high-strength thin T bar by rolling a steel having specified contents of C, Mn, and S, heating the steel in a continuous annealing furnace at a specified temp., water-quenching, tempering, then piercing, and roll-forming the steel. CONSTITUTION:A steel slab contg., by weight, 0.03-0.20%C, 1.5-3.0% Mn, >=0.010% S, the balance Fe, and inevitable impurities is hot-rolled, and then cold-rolled. The cold-rolled sheet is passed through a water-quenching continuous annealing furnace, heated at >=800 deg.C, and water-quenched from >=650 deg.C. The sheet is then tempered at 300-600 deg.C to obtain a two-phase structure consisting of

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