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1. 发明专利

JP2012122093A High strength cold-rolled steel sheet excellent in formability and method for producing the same 有权
标题翻译：优异的高强度冷轧钢板及其制造方法
公开(公告)号：JP2012122093A
公开(公告)日：2012-06-28
申请号：JP2010273297
申请日：2010-12-08
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： WAKABAYASHI CHIE , OKAMOTO TSUTOMU , FUJITA NOBUHIRO , TAKAHASHI MANABU , KAWADA HIROYUKI , MURASATO AKINOBU
IPC分类号： C22C38/00 , C21D9/46 , C22C38/60 , C23C2/06
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a steel sheet excellent in 0.2% proof stress, strength and ductility by optimizing the composition and the production condition of a TRIP (Transformation-Induced Plasticity) steel and controlling the structure of the steel sheet.SOLUTION: The steel sheet excellent in the formability contains 0.10-0.5% C, 1.0-4.0% Mn, 0.8-4.0% Si, 0.01-0.4% Ti, ≤0.015% P, ≤0.05% S, ≤0.005% N and the balance Fe with inevitable impurities, and contains as the steel sheet micro-structure, by an area ratio, 10-60% tempered-martensite, 5-50% ferrite, 5-30% bainite, 5-30% retained austenite and further, 0-20% total of perlite and martensite.
摘要翻译：待解决的问题：提供一种通过优化TRIP（转化诱导的可塑性）钢的组成和生产条件并控制其结构的方法来制造0.2％的极限应力，强度和延展性优异的钢板的方法钢板。
解决方案：成型性优异的钢板包含0.10-0.5％C，1.0-4.0％Mn，0.8-4.0％Si，0.01-0.4％Ti，≤0.015％P，≤0.05％S，≤0.005％ N，余量为不可避免的杂质，含有10〜60％回火马氏体，5-50％铁素体，5-30％贝氏体，5-30％残余奥氏体的面积比另外，珍珠岩和马氏体的总和为0〜20％。版权所有（C）2012，JPO＆INPIT

2. 发明专利

JP2012041613A Steel sheet for hot press having excellent delayed fracture resistance and collision safety, and method for producing the same 有权
$Steel sheet for hot press having excellent delayed fracture resistance and collision safety, and method for producing the same$
标题翻译：具有优异的延迟抗断裂和碰撞安全性的热压机用钢板及其制造方法
公开(公告)号：JP2012041613A
公开(公告)日：2012-03-01
申请号：JP2010185155
申请日：2010-08-20
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SANO KOICHI , SEKIDO YOSHITO , OKAMOTO TSUTOMU , KAWASAKI KAORU , FUJITA NOBUHIRO
IPC分类号： C22C38/00 , B21D22/20 , C21D1/18 , C21D9/46 , C22C38/06 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a steel sheet for hot press which can obtain a strength of ≥1,000 MPa after high temperature forming, and also has excellent delayed fracture resistance and collision safety, and a method for producing the same.SOLUTION: The steel sheet for hot press has a composition which comprises 0.1 to 0.5% C, 0.05 to 2% Si, 0.1 to 3% Mn and 0.003 to 2% Al, and in which the content of P is limited to ≤0.05%, the content of S is limited to ≤0.03% and the content of N is limited to ≤0.01%, and which satisfies formula (1) Si+Al≥1.0% and formula (2): 50≥Vc≥25; wherein Vc=10^(3.69-0.75β) [°C/s]; and β=2.7C+0.4Si+Mn.
摘要翻译：待解决的问题：提供一种能够在高温成形后获得≥1000MPa的强度的热压机用钢板，并且还具有优异的延迟断裂性和碰撞安全性及其制造方法。＆lt; P＆gt;解决方案：热压用钢板的组成为：含有0.1〜0.5％的C，0.05〜2％的Si，0.1〜3％的Mn和0.003〜2％的Al，其中P的含量限于 ≤0.05％，S含量限制在≤0.03％，N含量限制在≤0.01％，满足式（1）Si +Al≥1.0％和式（2）：50≥Vc 90 ≥25; 其中Vc 90 = 10 ^（3.69-0.75β）[℃/ s]; β= 2.7C + 0.4Si + Mn。版权所有（C）2012，JPO＆INPIT

3. 发明专利

JP2012031469A High-strength cold rolled steel sheet excellent in deep drawability, method of manufacturing the same 有权
标题翻译：高强度冷轧钢板，优点在于其可靠性，制造方法
公开(公告)号：JP2012031469A
公开(公告)日：2012-02-16
申请号：JP2010171871
申请日：2010-07-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： YAMAGUCHI YUJI , OKAMOTO TSUTOMU , SUGIURA NATSUKO , FUJITA NOBUHIRO
IPC分类号： C22C38/00 , C21D9/48 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a high-strength cold rolled steel sheet excellent in deep drawability, and to provide a method of manufacturing the same.SOLUTION: The high-strength cold rolled steel sheet excellent in deep drawability is characterized in that: it contains, by mass%, 0.03-0.25% C, 0.001-3.0% Si, 0.5-3.0% Mn, 0.001-0.15% P, 0.0005-0.05% S, 0.01-1.0% Al, 0.1-3.0% Cr, 0.0005-0.01% N, and the balance Fe with inevitable impurities; a mother phase is a ferrite phase; other metallographic structure contains one or two or more kinds out of bainite, austenite, martensite, pearlite in volume fraction of 2% or more; X-ray random intensity ratios of sheet faces {111} and {100} at a thickness of 1/2 in the steel sheet are respectively 5.0 or higher, and 3.0 or lower; and an average r value is 1.3 or higher.
摘要翻译：要解决的问题：提供一种具有优异的深冲性的高强度冷轧钢板，并提供其制造方法。解决方案：深冲性优异的高强度冷轧钢板的特征在于，以质量％计含有0.03-0.25％的C，0.001-3.0％的Si，0.5-3.0％的Mn，0.001-0.15 ％P，0.0005-0.05％S，0.01-1.0％Al，0.1-3.0％Cr，0.0005-0.01％N，余量为Fe和不可避免的杂质; 母相是铁素体相; 其他金相组织中含有一种或两种以上的贝氏体，奥氏体，马氏体，珠光体的体积分数为2％以上; 钢板的厚度为1/2的板面ä111}和ä100}的X射线随机强度比分别为5.0以上，3.0以下，平均r值为1.3以上。版权所有（C）2012，JPO＆INPIT

4. 发明专利

JP2007262487A High strength steel sheet having excellent stretch flange formability 有权
标题翻译：具有优异拉伸法兰力的高强度钢板
公开(公告)号：JP2007262487A
公开(公告)日：2007-10-11
申请号：JP2006088988
申请日：2006-03-28
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SUGIYAMA MASAAKI , TAKAHASHI ATSUSHI , TANIGUCHI YUICHI , OKAMOTO TSUTOMU
IPC分类号： C22C38/00 , C21D9/46 , C22C38/06 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel sheet having excellent stretch flange formability while maintaining a high strength satisfying a tensile strength of ≥500 MPa which is severely required mainly upon the production of automobile parts.
SOLUTION: Regarding the high strength steel sheet having excellent stretch flange formability, in a high strength steel sheet essentially consisting of a ferritic structure and having a tensile strength of ≥500 MPa, one or more kinds of carbide forming elements selected from Ti, Nb, V, W, Mo and Cr are comprised by the amount of 0.7 to 1.3 times the C content in total, and also, the one or more kinds of carbide forming elements are solid-soluted into the steel by 20 to 80% in mass ratio to the total content, and the balance is present in the steel as carbide with a grain size of ≤3 nm.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有优异的拉伸凸缘成形性的高强度钢板，同时保持主要在生产汽车部件时严格要求的满足≥500MPa的拉伸强度的高强度。解决方案：对于具有优异的拉伸凸缘成形性的高强度钢板，在由铁素体组织构成的拉伸强度≥500MPa的高强度钢板中，选自Ti ，Nb，V，W，Mo和Cr的总量为C含量的0.7〜1.3倍，并且将一种以上的碳化物形成元素固溶于钢中20〜80％与总含量的质量比，余量在作为晶粒尺寸≤3nm的碳化物的钢中存在。版权所有（C）2008，JPO＆INPIT

5. 发明专利

JP2007070660A High strength thin steel sheet having excellent formability, and method for producing the same 有权
标题翻译：具有良好可塑性的高强度钢板及其制造方法
公开(公告)号：JP2007070660A
公开(公告)日：2007-03-22
申请号：JP2005256602
申请日：2005-09-05
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： FUJITA NOBUHIRO , OKAMOTO TSUTOMU , MIZOGUCHI TOSHIAKI , TANIGUCHI YUICHI , UEJIMA YOSHIYUKI , GOTO KOICHI , FUKUDA SHUJI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a TRIP type high strength thin steel sheet having a structure more uniform than that of the conventional one, and having excellent formability, and to provide a method for producing the same. SOLUTION: The high strength thin steel sheet having excellent formability has a steel composition comprising, by mass, 0.05 to 0.25% C, ≤2.0% Si, 0.8 to 3% Mn, 0.0010 to 0.1% P, 0.0010 to 0.05% S, 0.0010 to 0.010% N and 0.01 to 2.0% Al, and the balance iron with inevitable impurities, and in which Mn micro-segregation in the range of 1/8t to 3/8t of the sheet thickness t lies in the range satisfying formula (1), and its structure comprises retained austenite having a mean carbon content of ≥0.9% by ≥3%: 0.10≥σ/Mn (1); wherein, Mn denotes its additional amount, and σ denotes the standard deviation in Mn micro-segregation measurement. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供具有比常规结构更均匀的结构的TRIP型高强度薄钢板，并且具有优异的成形性，并提供其制造方法。解决方案：具有优异成型性的高强度薄钢板具有质量分数为0.05〜0.25％的Si，≤2.0％的Si，0.8〜3％的Mn，0.0010〜0.1％的P，0.0010〜0.05％的钢， S为0.0010〜0.010％，Al为0.01〜2.0％，剩余铁为不可避免的杂质，其中，在板厚t的1 / 8t〜3 / 8t的范围内的Mn微分散在满足式（1），其结构包括平均碳含量≥0.9％≥3％的残余奥氏体：0.10≥σ/ Mn（1）; 其中，Mn表示其附加量，σ表示Mn微分离测定中的标准偏差。版权所有（C）2007，JPO＆INPIT

6. 发明专利

JP2006028640A Tin-plated and tin-free steel sheet excellent in workability, and manufacturing method therefor 有权
标题翻译：镀锌钢板和耐磨钢板，其制造方法及其制造方法
公开(公告)号：JP2006028640A
公开(公告)日：2006-02-02
申请号：JP2005174159
申请日：2005-06-14
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TAKEUCHI SATOSHI , OKAMOTO TSUTOMU , ITO KAZUHITO
IPC分类号： C22C38/00 , B21B3/00 , C21D8/02 , C21D8/04 , C21D9/46 , C22C38/06
CPC分类号： C22C38/06
摘要： PROBLEM TO BE SOLVED: To provide hard tin-plated and tin-free steel sheets which have excellent workability corresponding to temper grades of T4 to DR9 and to provide an efficient production method, by which the steel sheets can be produced respectively from starting materials having the same compositions.
SOLUTION: The hard tin-plated steel sheet of a temper grade of T4 to DR9 is produced from a starting material of the same composition by subjecting an ultralow carbon aluminum-killed steel having C and P contents adjusted to satisfy the relationship: 1.6×C×10
4 +0.93×P×10
3 ≥70 to temper rolling or secondary rolling (double reduction rolling) in a reduction ratio varied according to a temper grade.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供对应于回火等级为T4至DR9的具有优异加工性能的硬质镀锡和无锡钢板，并提供有效的生产方法，通过该方法可以分别从原料具有相同的成分。解决方案：通过对C和P含量调节的超低碳铝镇静钢进行处理以满足以下关系：由具有相同组成的起始材料制成回火级T4至DR9的硬质镀锡钢板： 1.6×C×10 4 + 0.93×P×10 3 ≥70，按照回火等级变化的回火轧制或二次轧制（双轧制）。版权所有（C）2006，JPO＆NCIPI

7. 发明专利

JP2005120436A High-strength steel sheet superior in hole-expandability and ductility, and manufacturing method therefor 有权
标题翻译：高强度钢板在高度可靠性和坚固性方面的优势及其制造方法
公开(公告)号：JP2005120436A
公开(公告)日：2005-05-12
申请号：JP2003357279
申请日：2003-10-17
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： OKAMOTO TSUTOMU , TANIGUCHI YUICHI , FUKUDA SHUJI
IPC分类号： C21D9/46 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high-strength steel sheet superior in hole-expandability and ductility with a tensile strength of 590 N/mm 2 or higher. SOLUTION: The high-strength steel sheet superior in hole-expandability and ductility comprises, by mass%, 0.01-0.20% C, 1.5% or less Si, 1.5% or less Al, 0.5-3.5% Mn, 0.2% or less P, 0.0005-0.009% S, 0.009% or less N, 0.0006-0.01% Mg, 0.005% or less O, one or two of 0.01-0.20% Ti and 0.01-0.10% Nb, and the balance iron with unavoidable impurities, and satisfies all of the following three expressions: [Mg%]≥([O%]/16×0.8)×24 --- (1), [S%]≤([Mg%]/24-[O%]/16×0.8+0.00012)×32 --- (2), and [S%]≤0.0075/[Mn%] --- (3); and has a metallographic structure consisting mainly of ferrite and martensite phases. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供抗拉强度为590N / mm 2以上的孔膨胀性和延展性优异的高强度钢板。解决方案：空穴扩展性和延展性优异的高强度钢板以质量％计含有C：0.01-0.20％，Si：1.5％以下，Al：1.5％以下，Mn：0.5〜3.5％，0.2％以下P，0.0005〜0.009％S，0.009％以下N，0.0006〜0.01％Mg，0.005％以下O，0.01-0.20％Ti和0.01-0.10％Nb中的一种或两种，余量铁不可避免杂质，满足以下三个表达式：[Mg％]≥（[O％] / 16×0.8）×24 ---（1），[S％]≤（[Mg％] / 24- [O ％] / 16×0.8 + 0.00012）×32 ---（2），[S％]≤0.0075/ [Mn％] ---（3）并且具有主要由铁素体和马氏体相组成的金相组织。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JP2003105486A HIGH STRENGTH STEEL SHEET AND GALVANIZED STEEL SHEET HAVING EXCELLENT FORMABILITY, AND PRODUCTION METHOD THEREFOR 审中-公开
公开(公告)号：JP2003105486A
公开(公告)日：2003-04-09
申请号：JP2001299197
申请日：2001-09-28
申请人： NIPPON STEEL CORP
发明人： MIZUTANI MASAAKI , TANIGUCHI YUICHI , OKAMOTO TSUTOMU
IPC分类号： C23C2/06 , C21D9/46 , C22C38/00 , C22C38/58 , C23C2/40
摘要： PROBLEM TO BE SOLVED: To realize a high strength steel sheet and a galvanized steel sheet which have excellent formability, and a production method therefor on an industrial scale. SOLUTION: The high strength steel sheet and the galvanized steel sheet having excellent formability have a composition containing, by mass, 0.12 to 0.35% C, 0.2 to 0.8% Si, 1.2 to 3.5% Mn, =5%, and bainite. Preferably, the mass% of Al, C, Mn, and Mo satisfy a specified relational equation.

9. 发明专利

JP2002226940A COLD ROLLED STEEL SHEET HAVING EXCELLENT HARDENABILITY 失效
公开(公告)号：JP2002226940A
公开(公告)日：2002-08-14
申请号：JP2001025787
申请日：2001-02-01
申请人： NIPPON STEEL CORP
发明人： MIZUTANI MASAAKI , TANIGUCHI YUICHI , OKAMOTO TSUTOMU
IPC分类号： C22C38/00 , C22C38/12
摘要： PROBLEM TO BE SOLVED: To provide a cold rolled steel sheet having excellent hardenability. SOLUTION: The cold rolled steel sheet having excellent delayed aging characteristic and hardenability can be manufactured by specifying the optimum additive quantity of Mo by determining the size and number of cementite grains within ferrite grains and the size of the ferrite grains, respectively, in low-carbon Al-K steel containing 0.01-0.20% C.

10. 发明专利

JP2002180186A HOT ROLLED STEEL SHEET AND COLD ROLLED STEEL SHEET HAVING EXCELLENT FORMABILITY AND HARDENABILITY 失效
公开(公告)号：JP2002180186A
公开(公告)日：2002-06-26
申请号：JP2000373967
申请日：2000-12-08
申请人： NIPPON STEEL CORP
发明人： MIYAGI TAKASHI , OKADA HIROYUKI , OKAMOTO TSUTOMU
IPC分类号： C22C38/00 , C22C38/32 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a hot rolled steel sheet and a cold rolled steel sheet having excellent formability and hardenability, i.e., whose hardenability is good, and to which high tensile strength can be imparted after quenching. SOLUTION: The steel sheet has a composition containing, by mass, 0.05 to 0.50% C, =(11800 Cr%+10600 Mn%-2250)×C%-1050>=0...(1), and in the case of the cold rolled steel sheet, the contents of C, Mn and Cr satisfy the inequality of 150>=(11800 Cr%+10600 Mn%-1300)×C%-1350>=0...(2).

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