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51. 发明专利

JPH05230537A PRODUCTION OF HIGH STRENGTH COLD ROLLED STEEL SHEET EXCELLEING IN WORKABILITY 失效
公开(公告)号：JPH05230537A
公开(公告)日：1993-09-07
申请号：JP6928792
申请日：1992-02-18
申请人： KOBE STEEL LTD
发明人： NAMITA YOSHIHARU , IWAI TAKAFUSA , OMIYA YOSHINOBU
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/14
摘要： PURPOSE:To stably produce a high strength cold rolled steel sheet capable of combining superior workability with deep drawability in a Ti-added extra-law carbon steel which is formed into. a high strength steel by the addition of P. CONSTITUTION:At the time of subj ecting a steel having a composition consisting of

52. 发明专利

JPH05195060A PRODUCTION OF BAKING HARDENING TYPE COLD ROLLED STEEL SHEET EXCELLENT IN AGEING RESISTANCE AND PRESS FORMABILITY 失效
公开(公告)号：JPH05195060A
公开(公告)日：1993-08-03
申请号：JP2317292
申请日：1992-01-13
申请人： KOBE STEEL LTD
发明人： BABA YUZO , IWAI TAKAFUSA , OMIYA YOSHINOBU
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/06
摘要： PURPOSE:To obtain a baking hardening type cold rolled steel sheet having superior press formability and ageing resistance and also to obtain a galvannealed steel sheet using the baking hardening type cold rolled steel sheet as a starting sheet. CONSTITUTION:At the time of applying hot rolling to a steel having a composition consisting of 0.0003-0.0035% C, 0.05-0.5% Mn, 0.015-0.10% P, 0.005-0.020% sol.Al, =60% cold rolling rate, and annealed at a temp. not lower than the recrystallization temp., by which the baking hardening type cold rolled steel sheet can be obtained. Further, by directly subjecting, by means of a hot-dip galvanizing line, the above cold rolled steel sheet to annealing at a temp. not lower than the recrystallization temp., to galvanizing treatment, and to alloying treatment, the galvannealed steel sheet using the baking hardening type cold rolled steel sheet as a starting sheet can be obtained.

53. 发明专利

JPH0517848A COLD ROLLED DEAD SOFT STEEL SHEET FOR ULTRADEEP DRAWING 失效
公开(公告)号：JPH0517848A
公开(公告)日：1993-01-26
申请号：JP19576491
申请日：1991-07-10
申请人： KOBE STEEL LTD
发明人： SHIRASAWA HIDENORI , IWAI TAKAFUSA , OMIYA YOSHINOBU , MUKAI YOICHI , HASHIMOTO SHUNICHI
IPC分类号： C22C38/00 , C22C38/14
摘要： PURPOSE:To improve the productivity and yield of a cold rolled steel sheet for ultradeep drawing by preparing a steel incorporating specified wt.% C, Al, N, etc., incorporating a specified atomic equivalent ratio of Ti and specifying the volume ratio of TiS to MnS. CONSTITUTION:A steel is incorporated with, by weight, =10MnS/TiS by volume. Then, the balance is consisting of Fe and other impurity elements. In such a manner, the pressing workability of a steel sheet for pressing working used for automobile bodies or the like can be improved.

54. 发明专利

JPH04346625A MANUFACTURE OF BAKING HARDENING TYPE COLD ROLLED STEEL SHEET EXCELLENT IN AGING RESISTANCE AND PRESS FORMABILITY 失效
公开(公告)号：JPH04346625A
公开(公告)日：1992-12-02
申请号：JP14948091
申请日：1991-05-24
申请人： KOBE STEEL LTD
发明人： SHIRASAWA HIDENORI , IWAI TAKAFUSA , OMIYA YOSHINOBU , BABA YUZO
IPC分类号： C21D8/04 , C21D9/48 , C22C38/00 , C22C38/06 , C23C2/02 , C23C2/06 , C23C2/28
摘要： PURPOSE:To obtain a baking hardening type cold rolled steel sheet and a cold rolled original CGA steel sheet having excellent press formability and aging resistance. CONSTITUTION:At the time of subjecting a steel contg. 0.0003 to 0.0035% C, 0.05 to 0.5% Mn, 0.015 to 0.10% P, 0.005 to 0.020% sol.Al, =60% cold rolling rate and is thereafter annealed at the recrystallization temp. or above to obtain a baking hardening type cold rolled steel sheet. Furthermore, this cold rolled steel sheet is directly subjected to annealing, galvanizing treatment and alloying treatment in a galvanizing line, by which a baking hardening type cold rolled original galvannealed steel sheet can be obtd.

55. 发明专利

JPH03130323A PRODUCTION OF COLD-ROLLED SOFT STEEL SHEET EXCELLENT IN BULGE FORMABILITY 失效
公开(公告)号：JPH03130323A
公开(公告)日：1991-06-04
申请号：JP11425490
申请日：1990-04-27
申请人： KOBE STEEL LTD
发明人： MIYAHARA MOTOYUKI , OMIYA YOSHINOBU
IPC分类号： C21D8/02 , C21D8/04 , C21D9/48 , C22C38/00 , C22C38/14
摘要： PURPOSE:To produce a cold-rolled soft steel sheet having high n-value and excellent in bulge formability by applying respectively specified hot and cold rollings to a dead-soft carbon steel having a specific composition in which proper amounts of Ti, Si, P, etc., are added and then subjecting the resulting steel sheet to respectively specified high-temp. recrystallization annealing and temper rolling. CONSTITUTION:A slab of a steel which has a composition consisting of, by weight, =Ar3 finishing temp. and at 600-750 deg.C coiling temp. The resulting hot rolled plate is pickled, cold-rolled at 60-85% rolling reduction) and subjected to recrystallization annealing at a temp. between 850 deg.C and the Ac3 point. Subsequently, this steel plate is subjected, if necessary, to overaging treatment at 660-800 deg.C and then to temper rolling at

56. 发明专利

JPH02259024A PRODUCTION OF COLD ROLLED SOFT STEEL SHEET EXCELLENT IN DEEP DRAWABILITY 失效
公开(公告)号：JPH02259024A
公开(公告)日：1990-10-19
申请号：JP8326389
申请日：1989-03-31
申请人： KOBE STEEL LTD
发明人： SHIRASAWA HIDENORI , IWAI TAKAFUSA , OMIYA YOSHINOBU
IPC分类号： C21D9/48 , C21D8/04 , C22C38/00 , C22C38/14
摘要： PURPOSE:To obtain a steel sheet improved in deep drawability even by means of coiling at low temp. by subjecting a plate of a soft steel in which the ratio of Ti to C is specified to finish rolling and then to slow cooling under specific conditions. CONSTITUTION:A steel has a composition consisting of, by weight, 0.001-0.008% C, 0.05-0.30% Mn, =4.0, and the balance Fe with inevitable impurities, where Ti*=Ti-(TiasTiS+TiasTiN). At the time of hot-rolling the above steel, rolling is performed by regulating finishing temp. to the Ar3 point. After finish rolling, cooling is exerted at >=15 deg.C/sec average cooling rate and further cooling is carried out for >=6sec through the temp. range from 790 down to 730 deg.C, by which TiC precipitation is accelerated. By this method, the cold rolled soft steel sheet excellent in deep drawability and having stable quality over the whole length of coil can be obtained.

57. 发明专利

JPS63293121A PRODUCTION OF HIGH-STRENGTH COLD ROLLED STEEL SHEET HAVING EXCELLENT LOCAL DUCTILITY 失效
公开(公告)号：JPS63293121A
公开(公告)日：1988-11-30
申请号：JP12907487
申请日：1987-05-25
申请人： KOBE STEEL LTD
发明人： SHIRASAWA HIDENORI , TANAKA FUKUTERU , OMIYA YOSHINOBU
IPC分类号： C21D9/46 , C21D6/00 , C22C38/00 , C22C38/04 , C22C38/44
摘要： PURPOSE:To enable production of a titled steel sheet by subjecting a steel made of a specific compsn. to an overaging treatment at a relatively high temp. to improve the local ductility thereof and compensating the degradation in the strength arising therefrom by increasing the volumetric per cent of a low temp. transformation forming phase. CONSTITUTION:The steel contg. by weight %, 0.08-0.30 C, 0.1-2.5 Si, 0.5-2.5 Mn, 0.01-0.15 P, and if necessary, 0.05-1.0 Cr and 0.95-0.6 Mo and consisting of the balance iron is used. This steel is subjected to recrystallization annealing at the temp. above the Ac1 point, then to force air cooling down to an Ar1-600 deg.C temp. range; thereafter, the steel is quickly cooled at >=100 deg.C/sec cooling rate to form the composite structure consisting of a ferrite phase and the low temp. transformation forming phase. The steel is thereafter subjected to the overaging treatment at 350-600 deg.C in such a manner that the ratio of the hardness Hv(L) of the low temp. transformation forming phase to the hardness Hv(alpha) of the ferrite determined by the equations I, II satisfies the equation III. In the equation, the element symbols denote the contents (weight %) of said elements in the steel; ToA denotes the overaging treatment temp. ( deg.C); VfL denotes the volumetric per cent (%) of the above-mentioned low temp. transformation forming phase.

58. 发明专利

JP2011102437A High-strength cold-rolled steel sheet having excellent coating film adhesion and workability, and method for producing the same 有权
标题翻译：具有优异涂层膜的高强度冷轧钢板粘合力和可加工性及其制造方法
公开(公告)号：JP2011102437A
公开(公告)日：2011-05-26
申请号：JP2010290850
申请日：2010-12-27
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 , B21B3/00 , C21D1/26 , C21D1/74 , C21D9/46 , C22C38/06 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To provide a high-strength cold-rolled steel sheet which has excellent coating film adhesion and workability and satisfies the tensile strength of ≥550 MPa.
SOLUTION: The high-strength cold-rolled steel sheet having excellent coating film adhesion and workability is composed of a steel sheet with a composite structure satisfying a prescribed componential composition, and comprising prescribed amounts of ferrite, bainite and retained austenite, and, when the cross-section in the vicinity of the surface of the steel sheet is observed at the magnification power of 2,000 using SEM (scanning electron microscope), cracks with a width of ≤3 μm and a depth of ≥5 μm are not present in optional 10 fields, its tensile strength is ≥550 MPa, and also, the tensile strength (TS: unit MPa) and elongation (El: unit %) satisfy inequality (1) TS×El≥19,000.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有优异的涂膜粘附性和加工性的高强度冷轧钢板，并且满足≥550MPa的拉伸强度。解决方案：具有优异的涂膜粘附性和可加工性的高强度冷轧钢板由具有规定组成组成的复合结构的钢板组成，并且包含规定量的铁素体，贝氏体和残余奥氏体，以及当使用SEM（扫描型电子显微镜）以放大倍数2000观察钢板表面附近的截面时，不存在宽度≤3μm，深度≥5μm的裂纹在可选的10个场中，其拉伸强度≥550MPa，拉伸强度（TS：单位MPa）和伸长率（El：单位％）满足不等式（1）TS×El≥19,000。版权所有（C）2011，JPO＆INPIT

59. 发明专利

JP2006144106A High-strength steel sheet excellent in adhesiveness of coating film 审中-公开
标题翻译：高强度钢板涂层胶粘剂优异
公开(公告)号：JP2006144106A
公开(公告)日：2006-06-08
申请号：JP2004339404
申请日：2004-11-24
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： NOMURA MASAHIRO , HASHIMOTO IKUO , OMIYA YOSHINOBU , KAMITSUMA SHINJI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/04
摘要： PROBLEM TO BE SOLVED: To provide a high-strength steel sheet which is excellent in adhesiveness of a coating film and exerts an excellent corrosion resistance even in a corrosive environment. SOLUTION: In the high-strength steel sheet excellent in adhesiveness of the coating film, when a cross section, which is orthogonal to the surface of the steel sheet and has a shear drop of ≤2 μm, is observed by a field emission type scanning electron microscope with an accelerating voltage of 20 kV and a magnification of ×5,000 to confirm a depositing state of Si- and/or Mn-containing oxide generated in a network- or hair root-like manner in the depth direction from the surface of the steel sheet, the average distance between the origins of the Si- and/or Mn-containing oxide generated in the network- or hair root-like manner at the surface of the steel sheet is ≥5 μm, and the total length of the oxide within a visual field which includes the surface of the steel sheet and has a depth of 12 μm and a width of 20 μm is ≤10 μm. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供即使在腐蚀性环境中也能赋予涂膜粘合性优异且耐腐蚀性优异的高强度钢板。解决方案：在涂膜粘附性优异的高强度钢板中，当通过场观察与钢板表面正交并且具有≤2μm的剪切降的横截面时发射型扫描电子显微镜，其加速电压为20kV，放大倍数为5000，以确认从网状或发根状态产生的含有Si和/或Mn的氧化物在深度方向上的沉积状态，在钢板表面，在钢板表面以网状或毛根状生成的Si-和/或含Mn氧化物的起源之间的平均距离为≥5μm，总长度的包含钢板表面的视野内的氧化物的深度为12μm，宽度为20μm的氧化物为≤10μm。版权所有（C）2006，JPO＆NCIPI

60. 发明专利

JP2004323969A High strength cold rolled steel sheet excellent in chemical processing 有权
标题翻译：高强度冷轧钢板优良的化学加工
公开(公告)号：JP2004323969A
公开(公告)日：2004-11-18
申请号：JP2004034862
申请日：2004-02-12
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： NOMURA MASAHIRO , HASHIMOTO IKUO , OMIYA YOSHINOBU , KAMURA MANABU , KAMITSUMA SHINJI
IPC分类号： C23C22/50 , C21D9/46 , C22C38/00 , C22C38/04 , C23G1/02
摘要： PROBLEM TO BE SOLVED: To provide a high strength cold rolled steel sheet which is excellent in chemical processing even in the case Si effective for increasing strength is largely added while maintaining its formability, and to provide its production method.
SOLUTION: The high strength cold rolled steel sheet contains, by mass, >0.1% C and ≥0.4% Si, wherein the Si content (mass%)/the Mn content (mass%) is ≥0.4, and has a tensile strength of ≥700 MPa. The surface covering ratio of Si-based oxide consisting mainly of Si in the steel sheet surface is ≤20 area%, and also, in the covering region of the Si-based oxide, the diameter of the maximum circle inscribed in the region is ≤5 μm.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供即使在有效提高强度的情况下，在保持其成形性的情况下大量添加Si也具有优异的化学加工性的高强度冷轧钢板，并提供其制造方法。解决方案：高强度冷轧钢板以Si含量（质量％）/ Mn含量（质量％）≥0.4为质量计含有> 0.1％C和≥0.4％的Si，并且具有抗拉强度≥700MPa。钢板表面主要由Si构成的Si系氧化物的表面覆盖率为≤20面积％，在Si系氧化物的覆盖区域中，该区域内的最大圆的直径≤ 5μm。版权所有（C）2005，JPO＆NCIPI

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