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1. 发明专利

JP2010285656A Precipitation strengthening type cold rolled steel sheet, and method for producing the same 有权
标题翻译：退火强化型冷轧钢板及其制造方法
公开(公告)号：JP2010285656A
公开(公告)日：2010-12-24
申请号：JP2009140414
申请日：2009-06-11
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： KAWADA HIROYUKI , SUGIURA NATSUKO , YOSHINAGA NAOKI
IPC分类号： C22C38/00 , B21B3/00 , C21D9/46 , C22C38/14 , C22C38/58 , C23C2/06 , C23C2/28
摘要： PROBLEM TO BE SOLVED: To provide a high strength cold rolled steel sheet which has a strength-ductility balance, and further has excellent stretch flange formability, and to provide a method for producing the same. SOLUTION: The cold rolled steel sheet has a composition containing, by mass, 0.03 to 0.15% Ti, and in which the content of Nb is limited to≤0.03%, the content of Mo is limited to ≤0.25% and the content of V is limited to ≤0.25%, satisfying 0.18≤6Ti+25Nb+3Mo+3V≤1.0, and in which Ti based carbonitrides of 1 to 50 nm are dispersed, the area ratio of ferrite is ≥95%, the average grain size of the ferrite is limited to ≤20 μm, and also, the ratio of unrecrystallized ferrite occupied in the ferrite is limited to ≤25%. In the production method, a steel is heated to ≥1,050°C, is, when necessary, cold rolled, is water-cooled to ≤550°C, and then, is subjected to cold rolling at a draft of ≥40%, and is annealed at the maximum heating temperature of 600°C to (Ac 1 +20)°C. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种强度延展性平衡的高强度冷轧钢板，并且还具有优异的拉伸凸缘成形性，并提供其制造方法。＆lt;解决方案＆gt;冷轧钢板的组成为含有0.03〜0.15％的Ti，Nb的含量限定在0.03％以下，Mo的含量限定为≤0.25％ V含量限制在≤0.25％，满足0.18≤6Ti+ 25Nb + 3Mo +3V≤1.0，其中分散有1〜50nm的Ti基碳氮化物，铁素体的面积比≥95％，平均粒度铁素体的尺寸限制在≤20μm，铁素体中的未再结晶铁素体的比例限制在≤25％。在制造方法中，将钢加热至≥050℃，根据需要冷轧，水冷至≤550℃，然后以≥40％的压下量进行冷轧，在600℃的最高加热温度下退火至（Ac 1℃/ 20℃）℃。版权所有（C）2011，JPO＆INPIT

2. 发明专利

JP2009249732A High-strength steel sheet having extremely excellent stretch flange formability, method for producing the same, and cast slab 有权
标题翻译：具有优异的拉伸法兰形成力的高强度钢板，用于生产它的方法和铸件
公开(公告)号：JP2009249732A
公开(公告)日：2009-10-29
申请号：JP2008102850
申请日：2008-04-10
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： AZUMA MASASHI , SUZUKI NORIYUKI , MARUYAMA NAOKI , YOSHINAGA NAOKI , MURASATO AKINOBU
IPC分类号： C22C38/00 , C21D9/46 , C22C38/06 , C22C38/58 , C23C2/06
摘要： PROBLEM TO BE SOLVED: To provide a high-strength steel sheet having extremely excellent stretch flange formability and suitable for automobiles, building materials, house appliances or the like.
SOLUTION: Disclosed is a high-strength steel sheet having a composition comprising, by mass, prescribed amounts of C, Si, Mn, P, S, Al, N and O, and the balance iron with inevitable impurities, and has a structure composed mainly of ferrite and bainite, and in which the number density of nonmetallic inclusions of >5 μm comprised in the steel sheet is ≤15 pieces/mm
2 , and the maximum tensile strength is ≥540 MPa.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有非常优异的拉伸凸缘成形性并适用于汽车，建筑材料，家用电器等的高强度钢板。解决方案：公开了一种高质量钢板，其组成包括：规定量的C，Si，Mn，P，S，Al，N和O以及余量的铁与不可避免的杂质，并且具有主要由铁素体和贝氏体组成的结构，其中包含在钢板中的>5μm的非金属夹杂物的数密度≤15个/ mm 2 ，最大拉伸强度≥540 MPa。版权所有（C）2010，JPO＆INPIT

3. 发明专利

JP2009228134A Steel sheet excellent in strength and hydrogen embrittlement resistance characteristic after hot stamping, and hot stamping method 审中-公开
标题翻译：热压成型后的强度和耐腐蚀性能优异的钢板，热压印方法
公开(公告)号：JP2009228134A
公开(公告)日：2009-10-08
申请号：JP2009036584
申请日：2009-02-19
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TAKEBAYASHI SHIGETO , OKA MASAHARU , YOSHINAGA NAOKI
IPC分类号： C22C38/00 , B21D22/20 , C21D9/46 , C22C38/14 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a steel sheet excellent in strength and hydrogen embrittlement resistance characteristics after hot stamping in which press forming and hardening by contact with molds are performed in one stage, and hot-stamping formed articles excellent in the strength and the hydrogen embrittlement resistance characteristics.
SOLUTION: The steel sheet contains, by mass%, 0.15 to 055% C, 0.010 to 0.100% Al, 0.001 to 0.040% Ti, 0.0003 to 0.0050% B and further contains Mn and Si so as to satisfy 0.005≤(Mn+Si)≤0.40%, ≤0.030% P and ≤0.020% S. The hot stamping method comprises heating the steel sheet to an Ac
3 transformation point and above, press forming the steel sheet without cooling the steel sheets to 3 transformation point, and performing hardening as it is by contact with the molds. The hot stamping formed articles are composed of the components described above and have the metal structure composed of martensite.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种在热冲压后的强度和耐氢脆性特性优异的钢板，其中通过一次进行与模具接触的冲压成形和硬化，以及强度高的热冲压成型制品和耐氢脆性。钢板以质量％计，含有0.15〜055％的C，0.010〜0.100％的Al，0.001〜0.040％的Ti，0.0003〜0.0050％的B，进一步含有Mn和Si，以满足0.005≤（ Mn + Si）≤0.40％，≤0.030％P和≤0.020％S.热冲压方法包括将钢板加热至Ac 3 相变点及以上，压制成型钢板而不冷却钢板与 3 相变点，并通过与模具接触进行硬化。热冲压成型品由上述成分构成，具有由马氏体构成的金属结构体。版权所有（C）2010，JPO＆INPIT

4. 发明专利

JP2008231448A Steel sheet for hot dip galvannealing and hot dip galvannealed steel sheet 有权
标题翻译：热镀锌钢板和热镀锌钢板
公开(公告)号：JP2008231448A
公开(公告)日：2008-10-02
申请号：JP2007068156
申请日：2007-03-16
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HONDA KAZUHIKO , YOSHINAGA NAOKI , AZUMA MASASHI , MARUYAMA NAOKI
IPC分类号： C22C38/00 , C21D9/46 , C22C18/00 , C22C38/06 , C22C38/38 , C23C2/06 , C23C2/28
摘要： PROBLEM TO BE SOLVED: To provide a steel sheet for high strength composite structure hot dip galvannealing and the high strength composite structure hot dip galvannealed steel sheet, usable as the outer sheet for automobile by improving the plating adhesion of the high strength composite structure hot dip galvannealed steel sheet having ferrite structure as a main phase.
SOLUTION: The steel sheet for hot dip galvannealing is composed by mass% of 0.02-0.3% C, ≤0.1% Si, 1.0-3.5% Mn, ≤0.02% P, ≤0.02% S, ≤0.014% Al, 0.001-0.008% N and the balance Fe with inevitable impurities, and if necessary, one or more kinds of 0.01-1.5% Cr, 0.01-1% Co, 0.01-1.5% Mo, are contained. Further, on the steel sheet for hot dip galvannealing, a galvannealing layer composed by mass% of 0.05-0.5% Al, 7-15% Fe and the balance Zn with inevitable impurities, is formed.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种高强度复合结构热浸镀锌钢板和通过提高高强度复合材料的电镀附着力而可用作汽车外板的高强度复合结构热浸合金化热镀锌钢板以铁素体结构为主相的结构热浸合金化热镀锌钢板。
解决方案：用于热浸镀锌钢板的钢板由质量％为0.02-0.3％C，≤0.1％Si，1.0-3.5％Mn，≤0.02％P，≤0.02％S，≤0.014％Al， 0.001-0.008％N，余量为不可避免的杂质，如果需要，可以含有0.01〜1.5％的Cr，0.01〜1％的Co，0.01〜1.5％的Mo。此外，在热浸镀锌钢板中，形成由质量％为0.05〜0.5％的Al，7〜15％的Fe和余量的Zn与不可避免的杂质组成的合金化层。版权所有（C）2009，JPO＆INPIT

5. 发明专利

JP2008174776A High-strength cold-rolled steel sheet excellent in stretch-flange formability and impact energy absorption characteristic and its production method 有权
标题翻译：高强度冷轧钢板优良的拉伸法兰形式和冲击能量吸收特性及其生产方法
公开(公告)号：JP2008174776A
公开(公告)日：2008-07-31
申请号：JP2007007983
申请日：2007-01-17
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： YOSHINAGA NAOKI , AZUMA MASASHI , SAKUMA KOJI , MURASATO AKINOBU
IPC分类号： C22C38/00 , C21D9/46 , C22C38/14 , C22C38/58 , C23C2/06
摘要： PROBLEM TO BE SOLVED: To provide a high-strength cold-rolled steel sheet excellent in stretch-flange formability and impact energy absorption characteristic, and a production method thereof.
SOLUTION: The high-strength cold-rolled steel sheet comprises, by mass%, 0.05-0.14% C, ≥0.001% and 2 , has a tensile strength TS of ≥490 MPa and 0.70 and
摘要翻译：解决的问题：提供拉伸凸缘成形性和冲击能量吸收特性优异的高强度冷轧钢板及其制造方法。解决方案：高强度冷轧钢板以质量％计含有0.05-0.14％C，≥0.001％和<0.60％Si，≥1.3％和<1.9％Mn，≥0.001％和<0.03 ％P，0.0001-0.01％S，<0.010％Al，≥0.0005％和<0.0040％N，0.014-0.032％Nb，≥0.009％和<0.025％Ti，0.002-0.011％O，余量为Fe，不可避免并且具有基本上包含铁素体和珠光体和/或碳化铁的结构。该钢板含有≥90个每1mm 2粒径为1〜20nm的含Nb化合物，其拉伸强度TS为≥440MPa，<720MPa，屈服强度为比值> 0.70和<0.92。版权所有（C）2008，JPO＆INPIT

6. 发明专利

JP2008156680A High-strength cold rolled steel sheet having high yield ratio, and its production method 审中-公开
标题翻译：具有高效率的高强度冷轧钢板及其生产方法
公开(公告)号：JP2008156680A
公开(公告)日：2008-07-10
申请号：JP2006344711
申请日：2006-12-21
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： AZUMA MASASHI , YOSHINAGA NAOKI , TATEISHI YASUHIRO , MURASATO AKINOBU , SAKUMA KOJI
IPC分类号： C22C38/00 , B21B1/22 , B21B3/00 , C21D9/46 , C22C18/00 , C22C38/14 , C22C38/58 , C23C2/06 , C23C2/40
摘要： PROBLEM TO BE SOLVED: To provide a high-strength cold rolled steel sheet having a high yield ratio and excellent formability, and in which the maximum tensile strength is ≥590 MPa, and to provide its production method.
SOLUTION: The high-strength cold rolled steel sheet has a composition comprising, by mass, 0.05 to 0.25% C, 0.001 to 0.7% Si, 1.1 to 1.9% Mn, 0.0001 to 0.0008% B, 0.001 to 0.1% Al, 0.001 to 0.01% N, ≤0.01% S and ≤0.01% O, and further comprising either or both of Nb and Ti by 0.01 to 0.07% in total, and the balance Fe with inevitable impurities, and has a steel sheet structure comprising recrystallized ferrite, unrecrystallized ferrite and pearlite, and has the maximum tensile strength of ≥590 MPa and a yield ratio of ≥0.70.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：待解决的问题：提供一种高屈服比和优异的成形性的高强度冷轧钢板，最大抗拉强度≥590MPa，并提供其制造方法。解决方案：高强度冷轧钢板的组成包括：0.05〜0.25％的C，0.001〜0.7％的Si，1.1〜1.9％的Mn，0.0001〜0.0008％的B，0.001〜0.1％的Al ，0.001〜0.01％的N，≤0.01％的S和≤0.01％的O，并且还包含Nb和Ti中的一种或两种，总计为0.01至0.07％，余量为Fe与不可避免的杂质，并且具有包括再结晶铁素体，未再结晶铁素体和珠光体，最大拉伸强度≥590MPa，屈服比≥0.70。版权所有（C）2008，JPO＆INPIT

7. 发明专利

JP2008024980A High-strength galvannealed steel sheet and producing method therefor 有权
标题翻译：高强度钢筋钢板及其生产方法
公开(公告)号：JP2008024980A
公开(公告)日：2008-02-07
申请号：JP2006197875
申请日：2006-07-20
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： AZUMA MASASHI , HONDA KAZUHIKO , NISHIYAMA TETSUO , YOSHINAGA NAOKI
IPC分类号： C22C38/00 , C21D9/46 , C22C18/00 , C22C38/06 , C22C38/58 , C23C2/02 , C23C2/06 , C23C2/40
摘要： PROBLEM TO BE SOLVED: To provide a high-strength galvannealed steel sheet capable of stably obtaining higher fatigue durability than heretofore.
SOLUTION: In the high-strength galvannealed steel sheet having galvannealed layer on the high-strength steel sheet, the high-strength steel sheet has ≥5% the volume ratio of the retained austenite and ≥10% the total of volume ratios of bainite and martensite, and in the interface between the galvannealed layer and the high-strength steel sheet, the thickness of a range, in which Fe concentration with GDS (glow discharge spectrometry) becomes 20-90%, is ≥1.2μm. Thereby, the high strength, high workability and high fatigue-durability can simultaneously be obtained.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供能够稳定地获得比迄今为止更高的疲劳耐久性的高强度合金化热浸镀锌钢板。解决方案：在高强度钢板上具有合金化热浸镀层的高强度合金化热镀锌钢板中，高强度钢板的残留奥氏体体积比≥5％，体积比率≥10％的贝氏体和马氏体，并且在合金化热浸镀层和高强度钢板之间的界面中，通过GDS（辉光放电光谱法）的Fe浓度为20〜90％的范围的厚度为≥1.2μm。由此，能够同时获得高强度，高加工性，高耐疲劳性。版权所有（C）2008，JPO＆INPIT

8. 发明专利

JP2008019502A High-strength galvanized steel sheet excellent in workability, paint bake hardenability and resistance to natural aging and its production method 有权
标题翻译：高强度优质钢板优良的耐磨性，耐腐蚀性和抗自然衰老及其生产方法
公开(公告)号：JP2008019502A
公开(公告)日：2008-01-31
申请号：JP2006348033
申请日：2006-12-25
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MARUYAMA NAOKI , TAKAHASHI MANABU , OGAWA TOSHIO , YASUI KENJI , NAKAZAWA MASATO , HONDA KAZUHIKO , YOSHINAGA NAOKI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/38 , C22C38/58 , C23C2/06 , C23C2/28
摘要： PROBLEM TO BE SOLVED: To provide a galvanized steel sheet which has a tensile strength of 390-600 MPa, has a low yield strength and a low yield ratio, is excellent in strength-ductility balance and has BH property and resistance to natural aging, and an inexpensive production method thereof.
SOLUTION: The high-strength galvanized steel sheet excellent in workability, paint baking hardenability and resistance to natural aging comprises, by mass, 0.02-0.08% C, ≤0.5% Si, 1.0-2.5% Mn, ≤0.05% P, ≤0.02% S, 0.0005-0.014% Al, >0.2% but ≤1.5% Cr, 0.001-0.008% N and the balance being Fe and unavoidable impurities, provided that Cr/Al is ≥30 and the area ratios of martensite and ferrite in a metallic structure are 3-20% and ≥80%, respectively. The galvanized steel sheet optionally further contains at least one element chosen from B, Mo, W, Nb, Ti, V, Cu, Ni, Ca, Mg, Zr, La and Ce.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提供拉伸强度为390-600MPa，具有低屈服强度和低屈服比的镀锌钢板，其强度 - 延展性平衡是优异的，具有BH性能和耐自然老化，及其廉价的生产方法。＆lt; P＆gt;解决方案：加工性，涂漆烘烤硬化性和耐老化性优异的高强度镀锌钢板，以质量计含有0.02-0.08％C，≤0.5％Si，1.0-2.5％Mn，≤0.05％P ，≤0.02％S，0.0005-0.014％Al，> 0.2％，≤1.5％Cr，0.001-0.008％N，余量为Fe和不可避免的杂质，条件是Cr / Al≥30，马氏体和金属结构中的铁素体分别为3-20％和≥80％。镀锌钢板任选地还含有选自B，Mo，W，Nb，Ti，V，Cu，Ni，Ca，Mg，Zr，La和Ce中的至少一种元素。版权所有（C）2008，JPO＆INPIT

9. 发明专利

JP2007302918A High strength steel sheet with excellent bore expandability and formability, and its manufacturing method 有权
标题翻译：具有优异的孔可扩展性和可变性的高强度钢板及其制造方法
公开(公告)号：JP2007302918A
公开(公告)日：2007-11-22
申请号：JP2006130017
申请日：2006-05-09
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： AZUMA MASASHI , YOSHINAGA NAOKI , MURASATO AKINOBU
IPC分类号： C22C38/00 , C21D9/46 , C22C38/06 , C22C38/58 , C23C2/06
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel sheet having ≥590 MPa maximum tensile strength (TS) and excellent bore expandability and formability.
SOLUTION: The steel sheet is a high strength cold rolled steel sheet excellent in bore expandability and formability and having following composition and microstructure: a composition consisting of, by mass, 0.05 to
摘要翻译：要解决的问题：提供具有≥590MPa的最大拉伸强度（TS）和优异的孔扩展性和成形性的高强度钢板。钢板是具有优异的孔膨胀性和成形性的高强度冷轧钢板，具有以下组成和组织：以质量0.05〜0.25％C，≤2.0％Si，1.1 至3.0％Mn，≤0.04％P，≤0.01％S，≤2.0％Al，≤0.01％N，≤0.01％O，余量为Fe与不可避免的杂质; 由体积分数≥40％的铁素体，≥5％的回火马氏体组成的微观结构，其余由铁素体和贝氏体结构组成，其中铁素体硬度（DHTF）和马氏体硬度（DHTM）之间的比例，DHTM / DHTF ，范围从1.5到3.0。如果需要，可以应用热浸镀锌处理或热浸镀锌后的合金化处理。版权所有（C）2008，JPO＆INPIT

10. 发明专利

JP2006193819A High-strength cold-rolled steel sheet superior in deep drawability, and manufacturing method therefor 有权
标题翻译：高强度冷轧钢板高强度及其制造方法
公开(公告)号：JP2006193819A
公开(公告)日：2006-07-27
申请号：JP2005009374
申请日：2005-01-17
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SUGIURA NATSUKO , MARUYAMA NAOKI , YOSHINAGA NAOKI , TAKAHASHI MANABU
IPC分类号： C22C38/00 , B21B1/22 , B21B1/26 , B21B3/00 , C21D9/48 , C22C38/14 , C22C38/58 , C23C2/40
摘要： PROBLEM TO BE SOLVED: To provide a high-strength cold-rolled steel sheet superior in deep drawability, and to provide a manufacturing method therefor.
SOLUTION: The cold-rolled steel sheet includes, by mass%, 0.01-0.3% C, 2.5% or less Si, 0.1-2.0% Mn, 0.15% or less P, 0.015% or less S, 0.1-1.5% Mo, 0.0006-0.01% B, 0.15% or less Al, 0.01-0.20% Nb, 0.01% or less N, and Ti in an amount of 48/14×N (mass%) or more but 0.2% or less; has a structure in which the pole density of {332} is 4.5 or more and the pole density of {100} is 3 or less in a center layer in a sheet thicknesses direction; and further has a minimum r-value of 1.0 or more and an average r-value of 1.3 or more. The cold-rolled steel sheet includes one or more elements of Ca, Sn, Co, Zn, W, Zr, V, Mg, Rem, Ni, Cu and Cr as needed. The manufacturing method comprises hot-rolling the steel at a finishing temperature between an Ar
3 transformation point and 900°C, cold-rolling the steel plate with a reduction of 30% to 70%, and annealing the steel sheet at a heating rate of 3°C/s or higher.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种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：冷轧钢板以质量％计含有0.01-0.3％C，2.5％或更少的Si，0.1-2.0％的Mn，0.15％或更少的P，0.015％或更小的S，0.1-1.5 ％Mo，0.0006〜0.01％B，0.15％以下Al，0.01-0.20％Nb，0.01％以下N，Ti量为48/14×N（质量％）以上且0.2％以下; 具有在板厚方向上的中心层中ζ332} <113>的极点密度为4.5以上且极值密度为ä100} <011>的结构为3以下的结构，并且还具有1.0以上的最小r值和1.3以上的平均r值。冷轧钢板根据需要含有Ca，Sn，Co，Zn，W，Zr，V，Mg，Rem，Ni，Cu，Cr等的一种以上的元素。制造方法包括在Ar 3 相变点和900℃之间的终轧温度下对钢进行热轧，将钢板冷轧30％〜70％，并将钢钢板以3℃/ s以上的加热速度。版权所有（C）2006，JPO＆NCIPI

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