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1. 发明专利

JP2012111978A Method for manufacturing high strength cold-rolled steel sheet with small variation of strength 有权
标题翻译：制造具有小变形强度的高强度冷轧钢板的方法
公开(公告)号：JP2012111978A
公开(公告)日：2012-06-14
申请号：JP2010259271
申请日：2010-11-19
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： HATAKE HIDEO , SAITO KENJI , MURAKAMI TOSHIO , ONISHI YOKO , MIYAMURA TAKEO , WASA YASUHIRO , ARAKI KANAME
IPC分类号： C21D9/46 , C22C38/00 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a high strength steel sheet, with which structural variation caused by the variation of heat-treatment temperature in a continuous annealing line and the variation of mechanical characteristics caused by the structural variation can be reduced.SOLUTION: When the high strength cold-rolled steel sheet, having composite structure obtained by using ferrite and tempering martensite as a body, is manufactured in the continuous annealing line, the continuous annealing line orderly performs: a heating process; a slow-cooling process till becoming the starting temperature Tq of quenching; a quenching process by rapid cooling; and a tempering process by reheating. Then, a ferritic fraction Vf in the steel sheet, measured with a magnetic characteristic just after the quenching process (at the time point of (1) in the figure), is compared with the target value Vf0 of the ferritic fraction which is needed to achieve the preset target value of the mechanical characteristic of the product steel sheet, and the starting temperature Tq of the quenching is adjusted so that the deviation from the target value Vf0, ΔVf=Vf-Vf0, approaches 0.
摘要翻译：解决的问题：为了提供一种制造高强度钢板的方法，由连续退火线中的热处理温度的变化引起的结构变化以及由结构变化引起的机械特性的变化可以减少解决方案：在连续退火生产线中制造具有通过使用铁素体和回火马氏体作为本体获得的复合结构的高强度冷轧钢板时，连续退火线有序地进行：加热过程; 直到成为淬火的起始温度Tq的缓慢冷却过程; 淬火过程快速冷却; 并通过再加热回火过程。然后，将刚刚淬火后（在图中（1）的时间点）的磁特性测量的钢板中的铁素体部分Vf与铁素体部分的目标值Vf0进行比较，该目标值Vf0为实现产品钢板的机械特性的预设目标值，调整淬火的起始温度Tq，使得与目标值Vf0，ΔVf= Vf-Vf0的偏差接近0.版权所有（（ C）2012，JPO＆INPIT

2. 发明专利

JP2012017500A Method for production of high-strength steel sheet 有权
标题翻译：高强度钢板的生产方法
公开(公告)号：JP2012017500A
公开(公告)日：2012-01-26
申请号：JP2010155669
申请日：2010-07-08
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： SAITO KENJI , MURAKAMI TOSHIO , HATAKE HIDEO , ONISHI YOKO
IPC分类号： C21D9/46 , C22C38/00 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for production of a high-strength steel sheet capable of reducing to the utmost, variation in composition and characteristics of the finally-produced high-strength steel sheet even in such a case that the composition before continuous annealing varies, or that the temperature condition or the like when continuously annealing fluctuates.SOLUTION: The method includes: elevating the temperature of a steel material having desired component composition to 600°C at an average temperature rising rate of 3°C/sec or more and to 600-750°C at the rising rate of 0.2-2.5°C/sec; performing a heating process of elevating the temperature to the range of Ac3 to (Ac3+50°C); performing a soaking process of keeping the above temperature range for ≤600 sec; and then quenching and tempering.
摘要翻译：待解决的问题：为了提供能够最终降低最终生产的高强度钢板的组成和特性变化的高强度钢板的制造方法，即使在连续退火前的组成变化，或连续退火时的温度条件等波动。解决方案：该方法包括：以3℃/秒以上的平均升温速度将具有所需组成成分的钢材的温度升高至600℃，升温速度为600-750℃ 0.2-2.5℃/秒; 进行将温度升高到Ac3〜（Ac3 + 50℃）的范围的加热处理。进行保持上述温度范围≤600秒的均热处理; 然后淬火回火。版权所有（C）2012，JPO＆INPIT

3. 发明专利

JP2011140695A High-strength cold rolled steel sheet having excellent elongation and stretch-flanging property 有权
标题翻译：高强度冷轧钢板，具有优异的伸长和拉伸性能
公开(公告)号：JP2011140695A
公开(公告)日：2011-07-21
申请号：JP2010002116
申请日：2010-01-07
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： SAITO KENJI , HATAKE HIDEO , IBANO AKIRA , MURAKAMI TOSHIO
IPC分类号： C22C38/00 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high strength cold rolled steel sheet which has a tensile strength of ≥980 MPa, satisfies both of an elongation of ≥12% and a stretch-flanging property of ≥100%, and has excellent formability.
SOLUTION: The high strength cold rolled steel sheet has a componential composition comprising, by mass, 0.03 to 0.30% C, ≤3.0% (including 0%) Si, 0.5 to 5.0% Mn, ≤0.1% P, ≤0.005% S, ≤0.01% N and 0.01 to 1.00% Al, and the balance iron with inevitable impurities, and has a structure composed of, by area ratio, 10 to 80% ferrite, and in which the total of martensite and retained austenite is
摘要翻译：解决问题的方案为了提供拉伸强度≥980MPa的高强度冷轧钢板，满足≥12％的伸长率和≥100％的拉伸翻边性能，并且具有优异的成形性。解决方案：高强度冷轧钢板具有以质量计含有0.03％至0.30％C，≤3.0％（包括0％）Si，0.5％至5.0％Mn，≤0.1％P，≤0.005％的组分组成％S，≤0.01％N，0.01〜1.00％Al，余量为铁与不可避免的杂质，并且具有由面积比为10〜80％的铁素体构成的结构，其中马氏体和残余奥氏体的总和为 <5％（包括0％）和硬度为320〜450Hv的平衡回火马氏体，其中与相邻的回火马氏体的结晶取向性差异的铁素体的总面积与在50μm×50μm的视野中观察到的全部铁素体≤5°为≥30％。版权所有（C）2011，JPO＆INPIT

4. 发明专利

JP2011080106A High strength cold-rolled steel sheet excellent in balance of extension and formability for extending flange 有权
标题翻译：高强度冷轧钢板优越的扩展和扩展法兰的可扩展性
公开(公告)号：JP2011080106A
公开(公告)日：2011-04-21
申请号：JP2009231683
申请日：2009-10-05
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： HATAKE HIDEO , MURAKAMI TOSHIO , IBANO AKIRA , SAITO KENJI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a high strength cold-rolled steel sheet specially excellent in a deep-drawing performance while securing the balance of an extension and the formability for extending a flange, in a higher strength class than that of a conversion steel sheet.
SOLUTION: This cold-rolled steel sheet has the followings, that is, this steel has the component composition composed by mass% of 0.1-0.3% C, 1.0-3.0% Si, 0.1-5.0% Mn, ≤0.1% P, ≤0.1% S, ≤0.01% N, 0.01-1.00% Al and the balance Fe with inevitable impurities, and the structure containing 50 to 380 to 500Hv in hardness and the balance area ratio of the tempered martensite, containing ferrite having 210 to 300 Hv in hardness, and the distributing state of cementite grains in the above tempered martensite, in which cementite grains having 0.02 to 2 of the tempered martensite and the cementite grains having ≥0.1 μm circle equivalent diameter are ≤1.5 pieces per 1 μm
2 of the tempered martensite.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了提供特别优异的深冲性能的高强度冷轧钢板，同时确保了延伸性的平衡和用于延伸凸缘的成型性，其强度等级高于转换钢板。解决方案：该冷轧钢板具有如下组成：该组成组成由质量％为0.1〜0.3％，Si：1.0〜3.0％，Mn：0.1〜5.0％，Mn：0.1％ P，≤0.1％S，≤0.01％N，0.01-1.00％Al，余量为Fe和不可避免的杂质，其硬度和余量为> 380〜500Hv的回火马氏体的面积比为50〜70％回火马氏体的含有硬度为210〜300Hv的铁素体的回火马氏体的面积率以及上述回火马氏体中的渗碳体粒子的分布状态，其中具有0.02〜0.1μm圆当量直径的渗碳体粒子为1〜20μm 回火马氏体的 2 和圆形当量直径≥0.1μm的渗碳体颗粒在回火马氏体的每1μm 2 中≤1.5。版权所有（C）2011，JPO＆INPIT

5. 发明专利

JP2010255091A High strength cold rolled steel sheet having excellent balance between elongation and stretch-flangeability and method for producing the same 有权
标题翻译：高强度冷轧钢板在伸长率和拉伸强度之间具有良好的平衡性及其生产方法
公开(公告)号：JP2010255091A
公开(公告)日：2010-11-11
申请号：JP2009231681
申请日：2009-10-05
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： MURAKAMI TOSHIO , IBANO AKIRA , SAITO KENJI , HATAKE HIDEO
IPC分类号： C22C38/00 , C21D9/48 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high strength cold-rolled steel sheet having an improved balance between elongation and stretch-flangeability and better formability, and to provide a method for producing the same.
SOLUTION: The cold-rolled steel sheet has a composition containing, by mass, 0.05-0.30% C, ≤3.0% Si, 0.1-5.0% Mn, ≤0.1% P, ≤0.010% S, 0.001-0.10% Al, and 0.02-0.40% Nb, wherein ([%Nb]/96+[%Ti]/51+[%V]/48)×48=0.01-0.20% is satisfied in at least one of 0.01-0.20% Ti and 0.01-0.20% V, and the remainder being mainly iron, and has a structure comprising, by an area rate, α=10-80%, retention γ+M KAM≤0.4° of sites having a KAM value≤0.4° and the areal α proportion V
α satisfies X
KAM≤0.4° /V
α ≥0.8 and the proportion X
KAM=0.6-0.8° of sites having a KAM value in the range of 0.6-0.8 is 10-20%. In the hard second phase adjoining the α, three or less θ particles having a diameter of 0.1 μm or larger and five or less deposition materials containing Nb, Ti and V and having a diameter of 20 nm or larger are dispersed per μm
2 of the hard second phase.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种在伸长率和拉伸凸缘性之间具有改善的平衡性和更好的成形性的高强度冷轧钢板，并提供其制造方法。解决方案：冷轧钢板具有以质量计含有0.05-0.30％C，≤3.0％Si，0.1-5.0％Mn，≤0.1％P，≤0.010％S，0.001-0.10％ Al和0.02-0.40％的Nb，其中（[％Nb] / 96 + [％Ti] / 51 + [％V] / 48）×48 = 0.01-0.20％在0.01-0.20％ Ti和0.01-0.20％V，余量主要为铁，并且具有包括面积率为α= 10-80％，保留γ+ M <5％和剩余的硬质第二相的结构，其中，对于KAM值频率分布曲线，α粒径为5μm以下，KAM值≤0.4°的位置的比例X KAM≤0.4°和面积α 比例V α满足X KAM≤0.4° / V SB>≥0.8，比例X KAM = 0.6-0.8° KAM值在0.6〜0.8的范围内的SB> 10〜20％。在邻接α的硬质第二相中，每μm分散有直径为0.1μm以上的3个以下的θ粒子和5个以下的含有Nb，Ti，V的淀积材料，直径为20nm以上的淀积材料， 2 硬的第二阶段。版权所有（C）2011，JPO＆INPIT

6. 发明专利

JP2010255090A High strength cold-rolled steel sheet having excellent balance between elongation and stretch-flangeability, and method for producing the same 有权
标题翻译：高强度冷轧钢板在伸长率和拉伸压缩性之间具有良好的平衡，以及生产它们的方法
公开(公告)号：JP2010255090A
公开(公告)日：2010-11-11
申请号：JP2009231680
申请日：2009-10-05
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： MURAKAMI TOSHIO , IBANO AKIRA , SAITO KENJI , HATAKE HIDEO
IPC分类号： C22C38/00 , C21D9/46 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high strength cold-rolled steel sheet having an improved balance between elongation and stretch-flangeability, and better formability, and to provide a method for producing the same.
SOLUTION: The cold-rolled steel sheet has a composition containing, by mass, 0.05-0.30% C, ≤3.0% (including 0%) Si, 0.1-5.0% Mn, ≤0.1% (including 0%) P, ≤0.010% (including 0%) S, and 0.001-0.10% Al, and the balance mainly iron, and has a structure comprising 10-80% ferrite, KAM≤0.4° of sites having a KAM value≤0.4° and the areal ferrite proportion V
α satisfies X
KAM≤0.4° /V
α ≥0.8 and the proportion X
KAM=0.6-0.8° of sites having a KAM value in the range of 0.6-0.8 is 10-20%. In the hard second phase adjoining the ferrite, three or less cementite particles having an equivalent-circle diameter of 0.1 μm or larger are dispersed per μm
2 of the hard second phase.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种在伸长率和拉伸凸缘性之间具有改善的平衡性和更好的成形性的高强度冷轧钢板，并提供其制造方法。＆lt; P＆gt;解决方案：冷轧钢板的组成为：含有0.05-0.30％的C，≤3.0％（包括0％）Si，0.1-5.0％Mn，≤0.1％（包括0％）P ，≤0.010％（包括0％）S和0.001-0.10％Al，余量主要为铁，并且具有包含10-80％铁素体，<5％（包括0％）残余奥氏体和马氏体之和的结构，平均值为硬的第二相，其中对于KAM值频率分布曲线，具有KAM值≤0.4°的位点的比例X KAM≤0.4°的关系，以及面积铁素体比例V α满足X KAM≤0.4° / V α≥0.8，比例X KAM = 0.6-0.8 KAM值在0.6〜0.8范围内的部位的°为10〜20％。在与铁素体相邻的硬的第二相中，相当于圆周直径为0.1μm以上的3个以下的渗碳体粒子分散在硬质相的每个 2 。版权所有（C）2011，JPO＆INPIT

7. 发明专利

JP2010156032A High-strength cold-rolled steel sheet superior in balance of elongation and formability for extension flange 有权
标题翻译：高强度冷轧钢板超高频延伸和扩展法兰的可伸缩性
公开(公告)号：JP2010156032A
公开(公告)日：2010-07-15
申请号：JP2009000268
申请日：2009-01-05
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： IBANO AKIRA , MURAKAMI TOSHIO , HATAKE HIDEO , SAITO KENJI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high-strength cold-rolled steel sheet superior in the balance of elongation and formability for an extension flange, while using a dual-phase steel (DP steel) having a component system similar to that of a conventional one.
SOLUTION: The high-strength cold-rolled steel sheet has a component composition comprising, by mass%, more than 0.03% but 0.30% or less C, less than 3.0% (including 0%) Si, 0.5-5.0% Mn, less than 0.1% P, 0.005% or less S, 0.01% or less N, more than 0.01% but 1.00% or less Al and the balance iron with unavoidable impurities; and has a dual-phase structure composed of 5-95% of tempered martensite by an area rate and the balance being ferrite, in which a ratio C
Mn*α /C
Mn*M of an average concentration C
Mn*α of Mn in the ferrite to an average concentration C
Mn*M of Mn in the tempered martensite is 0.95 or more.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：待解决的问题：为了提供一种在延伸凸缘的伸长率和成型性的平衡方面优异的高强度冷轧钢板，同时使用具有与之相似的部件系统的双相钢（DP钢）一个常规的。解决方案：高强度冷轧钢板具有以质量％计超过0.03％但为0.30％以下的C，小于3.0％（包括0％）Si，0.5〜5.0％ Mn，小于0.1％P，0.005％以下S，0.01％以下N，0.01％以上1.00％以下Al，剩余铁与不可避免的杂质; 并且具有按照面积率由5-95％的回火马氏体组成的二相结构，余量为铁素体，其中C Mn *α / C Mn * 铁素体中Mn的平均浓度C Mn *α /回火马氏体中Mn的平均浓度C Mn * M 的/ SB> 0.95以上。版权所有（C）2010，JPO＆INPIT

8. 发明专利

JP2009144239A High-strength cold-rolled steel sheet with excellent elongation and stretch-flangeability 有权
标题翻译：高强度冷轧钢板，具有优异的拉伸强度和拉伸强度
公开(公告)号：JP2009144239A
公开(公告)日：2009-07-02
申请号：JP2008290099
申请日：2008-11-12
申请人： Kobe Steel Ltd , 株式会社神戸製鋼所
发明人： HATAKE HIDEO , MURAKAMI TOSHIO , IBANO AKIRA , SAITO KENJI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high-strength cold-rolled steel sheet which is improved in elongation and stretch-flangeability and exhibits more excellent formability.
SOLUTION: The cold-rolled steel sheet has a composition consisting of, by mass, 0.03 to 0.30% C, 0.1 to 3.0% Si, 0.1 to 5.0% Mn, ≤0.1% P, ≤0.005% S, ≤0.01% N, 0.01 to 1.00% Al and the balance iron with inevitable impurities and also has a structure which consists of ≥40% (up to 100% inclusive) in terms of area fraction of tempered martensite having 300 to 380 Hv hardness and the balance ferrite. Cementite particles in the tempered martensite are dispersed in such a way that ≥10 cementite particles of 0.02 to 2 of the tempered martensite and ≤3 cementite particles of ≥0.1 μm circle-equivalent diameter are present per 1 μm
2 of the tempered martensite.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种提高伸长率和拉伸凸缘性的高强度冷轧钢板，并且具有更优异的成形性。解决方案：冷轧钢板的质量为0.03〜0.30％，Si：0.1〜3.0％，Mn：0.1〜5.0％，P：≤0.005％，S：≤0.01 ％N，0.01〜1.00％Al，余量为铁与不可避免的杂质，并且具有由具有300〜380Hv硬度的回火马氏体的面积分率≥40％（含有100％以上）的结构，余量铁氧体。回火马氏体中的水泥石颗粒以每1微米 2 的回火马氏体和≤3个渗碳体颗粒存在≥10个圆当量直径的10个渗碳体颗粒分散每回火马氏体的每1微米 2 存在≥0.1微米的圆当量直径。版权所有（C）2009，JPO＆INPIT

9. 发明专利

JP2007100209A High-strength spring steel having excellent hydrogen embrittlement resistance 有权
标题翻译：具有优异抗压强度的高强度弹簧钢
公开(公告)号：JP2007100209A
公开(公告)日：2007-04-19
申请号：JP2006006519
申请日：2006-01-13
申请人： Kobe Steel Ltd , Shinshu Tlo:Kk , 株式会社信州Tlo , 株式会社神戸製鋼所
发明人： YUSE FUMIO , IKEDA CHIKAYUKI , SAITO KENJI , SUGIMOTO KOICHI
IPC分类号： C22C38/00 , C22C38/06 , C22C38/16
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel used for spring steel that has excellent hydrogen embrittlement resistance. SOLUTION: The high strength steel which spring steel having excellent hydrogen embrittlement resistance comprises 0.20 to 0.60% of C, 1.0 to 3.0% of Si, 1.0 to 3.5% of Mn, higher than 0% and not higher than 1.5% of Al, 0.15% or less P, 0.02% or less S, and balance of iron and inevitable impurities and the structure includes: 1% or more residual austenite; 80% or more of the total of bainitic ferrite and martensite; and 10% or less (including 0%) of the total content of ferrite and pearlite in the proportion of area to the entire structure, and also the mean axis ratio (major axis/minor axis) of the residual austenite grains is 5 or higher and the steel tensile strength is 1,860 MPa or higher. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供具有优异的耐氢脆性的用于弹簧钢的高强度钢。解决方案：具有优异的耐氢脆性的弹簧钢的高强度钢包括C：0.20〜0.60％，Si：1.0〜3.0％，Mn：1.0〜3.5％，高于0％〜1.5％ Al，0.15％以下P，0.02％以下S，余量为铁和不可避免的杂质，结构包括：1％以上残余奥氏体; 80％以上的贝氏体铁素体和马氏体总数; 和占整个结构面积的比例的铁素体和珠光体的总含量的10％以下（包括0％），残留奥氏体晶粒的平均轴比（长轴/短轴）为5以上钢抗拉强度为1860MPa以上。版权所有（C）2007，JPO＆INPIT

10. 发明专利

JP2006207019A Ultrahigh-strength steel sheet superior in hydrogen-embrittlement resistance and workability 有权
标题翻译：超高强度钢板超级耐腐蚀性和耐磨性
公开(公告)号：JP2006207019A
公开(公告)日：2006-08-10
申请号：JP2005147357
申请日：2005-05-19
申请人： Kobe Steel Ltd , Shinshu Tlo:Kk , 株式会社信州Tlo , 株式会社神戸製鋼所
发明人： YUSE FUMIO , IKEDA CHIKAYUKI , MUKAI YOICHI , AKAMIZU HIROSHI , KINUGASA JUNICHIRO , SAITO KENJI , SUGIMOTO KOICHI , HOJO TOMOHIKO
IPC分类号： C22C38/00 , C22C38/12
摘要： PROBLEM TO BE SOLVED: To provide an ultrahigh-strength steel sheet superior in hydrogen-embrittlement resistance and workability.
SOLUTION: The ultrahigh-strength steel sheet superior in hydrogen-embrittlement resistance comprises, by mass, over 0.25% to 0.60% C, 1.0-3.0% Si, 1.0-3.5% Mn, 0.15% or less P, 0.02% or less S, 1.5% or less (excluding 0%) Al, 1.0% or less (excluding 0%) Mo, 0.1% or less (excluding 0%) Nb and the balance iron with unavoidable impurities; has a metallurgical structure after the sheet has been stretch-worked at a stretching rate of 3%, in which retained austenite occupies 1% or more, bainitic ferrite and martensite occupy 80% or more in total, and ferrite and pearlite occupy 9% or less (including 0%) in total by an area rate with respect to the total structure, and in which crystal grains of the retained austenite have an average axial ratio (major axis/minor axis) of 5 or higher; and has further a tensile strength of 1,180 MPa or higher.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供耐氢脆性和加工性优异的超高强度钢板。解决方案：耐氢脆性优异的超高强度钢板以质量计包含超过0.25％至0.60％的C，1.0-3.0％的Si，1.0-3.5％的Mn，0.15％或更少的P，0.02％以下S，1.5％以下（不含0％）Al，1.0％以下（不含0％）Mo，0.1％以下（不含0％）Nb，余量为不可避免的杂质的铁; 在片材以3％的拉伸速度进行拉伸加工后，其中残留奥氏体占1％以上，贝氏体铁素体和马氏体总共占80％以上，铁素体和珠光体占9％，残留奥氏体的晶粒的平均轴比（长轴/短轴）为5以上，总体上的面积率相对于总结构的面积率相对较少（包括0％）; 并具有1180MPa以上的拉伸强度。版权所有（C）2006，JPO＆NCIPI

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