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1. 发明专利

JP2011111672A HIGH STRENGTH COLD ROLLED STEEL SHEET HAVING MAXIMUM TENSILE STRENGTH OF ≥900 MPa AND HAVING EXCELLENT IMPACT ABSORBED ENERGY, METHOD FOR PRODUCING THE SAME, HIGH STRENGTH GALVANIZED STEEL SHEET, AND METHOD FOR PRODUCING THE SAME 有权
标题翻译：具有> = 900MPa的最大拉伸强度并且具有优异的冲击吸收能量的高强度冷轧钢板，其生产方法，高强度镀锌钢板及其制造方法
公开(公告)号：JP2011111672A
公开(公告)日：2011-06-09
申请号：JP2009272071
申请日：2009-11-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： AZUMA MASASHI , SUZUKI NORIYUKI , MARUYAMA NAOKI , MURASATO AKINOBU , SAKUMA KOJI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/06 , C22C38/58 , C23C2/06 , C23C2/40
摘要： PROBLEM TO BE SOLVED: To provide a high strength cold rolled steel sheet having excellent impact absorbed energy and maximum tensile strength of ≥900 MPa, wherein compatibility between a static/dynamic ratio equal to or above that in a class of ≥590 MPa and the maximum tensile strength of ≥900 MPa is attained, and a method for producing the same, and to provide a high strength galvanized steel sheet and a method for producing the same. SOLUTION: The steel sheet has steel components comprising, by mass, 0.07 to 0.25% C, 0.3 to 2.50% Si, 1.5 to 3.0% Mn, 0.001 to 0.03% P, 0.0001 to 0.01% S, ≤1.0% Al, 0.0005 to 0.0100% N and 0.0005 to 0.007% O, and the balance iron with inevitable impurities, wherein at the inside of the steel sheet, the density of dislocations included in the steel sheet is ≤8×10 11 (pieces/mm 2 ), and a lstatic/dynamic ratio (=FS2/FS1) being a ratio between semi-static strength (FS1) at a strain ratio of 0.0067(s -1 ) and dynamic strength(FS2) at a strain rate of 1,000(s -1 ) is ≥1.05. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了提供具有优异的冲击吸收能和≥900MPa的最大拉伸强度的高强度冷轧钢板，其中静态/动态比等于或大于等于≥590的静态/动态比的相容性 MPa，最大拉伸强度≥900MPa，其制造方法，提供高强度镀锌钢板及其制造方法。钢板具有以质量计0.07〜0.25％的Si，0.3〜2.50％的Si，1.5〜3.0％的Mn，0.001〜0.03％的P，0.0001〜0.01％的S，≤1.0％的Al，，0.0005〜0.0100％的N和0.0005〜0.007％的O，剩余的铁与不可避免的杂质，钢板的内部，钢板中包含的位错密度为≤8×10 < SP>（件/ mm 2 ），并且在应变比为0.0067（s 2）的半静态强度（FS1）之间的静态/动态比（= FS2 / FS1） -1 ）和应变速率为1000（s -1 ）的动态强度（FS2）≥1.05。版权所有（C）2011，JPO＆INPIT

2. 发明专利

JP2011111671A HIGH STRENGTH STEEL SHEET HAVING MAXIMUM TENSILE STRENGTH OF ≥900 MPa AND HAVING SATISFACTORY DUCTILITY AND DELAYED FRACTURE RESISTANCE, METHOD FOR PRODUCING HIGH STRENGTH COLD ROLLED STEEL SHEET, AND METHOD FOR PRODUCING HIGH STRENGTH GALVANIZED STEEL SHEET 有权
标题翻译：具有> = 900MPa的最大拉伸强度的高强度钢板，具有满意的密度和延迟耐断裂性的高强度钢板，用于生产高强度冷轧钢板的方法以及用于生产高强度钢板的方法
公开(公告)号：JP2011111671A
公开(公告)日：2011-06-09
申请号：JP2009272070
申请日：2009-11-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： AZUMA MASASHI , SUZUKI NORIYUKI , MARUYAMA NAOKI , MURASATO AKINOBU , SAKUMA KOJI
IPC分类号： C22C38/00 , B21B3/00 , C21D9/46 , C22C38/14 , C22C38/58 , C23C2/02 , C23C2/28 , C25D5/26
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel sheet having the maximum tensile strength of ≥900 MPa and having satisfactory ductility and delayed fracture toughness, and to provide a method for producing it. SOLUTION: The high strength steel sheet having the maximum tensile strength of ≥900 MPa and having satisfactory ductility and delayed fracture toughness has a composition comprising, by mass, 0.07 to 0.25% C, 0.3 to 2.50% Si, 1.5 to 3.0% Mn, 0.005 to 0.09% Ti, 0.0001 to 0.01% B, 0.001 to 0.03% P, 0.0001 to 0.01% S, ≤2.5% Al, 0.0005 to 0.0100% N and 0.0005 to 0.007% O, and the balance iron with inevitable impurities, wherein a steel sheet structure consists essentially of ferrite, and includes martensite composed of block sizes of ≤1 μm, and the volume ratio of the ferrite is ≥50%, the C concentration in the martensite is 0.3 to 0.9%, and a Yield ratio (YR) is ≤0.75. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供具有≥900MPa的最大拉伸强度并且具有令人满意的延展性和延迟的断裂韧性的高强度钢板，并提供其制造方法。解决方案：具有≥900MPa的最大拉伸强度并且具有令人满意的延展性和延迟的断裂韧性的高强度钢板具有以质量计含有0.07-0.25％的C，0.3到2.50％的Si，1.5到3.0 ％Mn，0.005〜0.09％Ti，0.0001〜0.01％B，0.001〜0.03％P，0.0001〜0.01％S，≤2.5％Al，0.0005〜0.0100％N，0.0005〜0.007％O，余量铁不可避免杂质，其中钢板结构基本上由铁素体组成，并且包括由块尺寸≤1μm组成的马氏体，铁素体的体积比≥50％，马氏体的C浓度为0.3〜0.9％，产率（YR）≤0.75。版权所有（C）2011，JPO＆INPIT

3. 发明专利

JP2008274360A High-strength steel sheet having controlled elongation at yield point, and manufacturing method therefor 有权
标题翻译：具有控制拉伸强度的高强度钢板及其制造方法
公开(公告)号：JP2008274360A
公开(公告)日：2008-11-13
申请号：JP2007120336
申请日：2007-04-27
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： AZUMA MASASHI , YOSHINAGA NAOKI , SAKUMA KOJI , ITAMI ATSUSHI , MURASATO AKINOBU
IPC分类号： C22C38/00 , B21B3/00 , C21D9/46 , C22C18/00 , C22C38/14 , C22C38/58 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a high-strength steel sheet which has a high strength of 540 MPa or higher as the maximum tensile strength, high formability and a high yield ratio. SOLUTION: The high-strength steel sheet comprises, by mass%, 0.04 to 0.17% C, 0.001% or more but less than 0.60% Si, 1.2 to 1.9% Mn, 0.001% or more but less than 0.04% P, 0.0001 to 0.01% S, 0.10% or less Al, 0.0005 to 0.010% N, 0.002 to 0.010% O, at least one of Nb and Ti of 0.012 to 0.052% in total, and the balance iron with unavoidable impurities; has a metallurgical structure which mainly comprises ferrite with an average grain size of 5 μm or smaller and pearlite and/or iron-based carbides, and which includes the pearlite and/or iron-based carbides of 3,500 pieces or more per square millimeter in the ferrite grain; has the maximum tensile strength TS of 540 MPa or higher but less than 720 MPa; and has an elongation at yield point of 0.5% or more but less than 4.5%. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决的问题：提供具有540MPa以上的高强度的高强度钢板作为最大拉伸强度，高成形性和高屈服比。解决方案：高强度钢板以质量％计含有0.04〜0.17％的C，0.001％以上且小于0.60％的Si，1.2〜1.9％的Mn，0.001％以上且0.04％以下的P ，0.0001〜0.01％的S，0.10％以下的Al，0.0005〜0.010％的N，0.002〜0.010％的O，Nb和Ti中的至少一种总计为0.012〜0.052％，余量的铁为不可避免的杂质; 具有主要包含平均粒径为5μm以下的铁素体和珠光体和/或铁基碳化物的冶金结构，其包括在每平方毫米3,500个以上的珠光体和/或铁基碳化物铁素体晶粒; 具有540MPa以上但小于720MPa的最大拉伸强度TS; 屈服点的伸长率为0.5％以上且小于4.5％。版权所有（C）2009，JPO＆INPIT

4. 发明专利

JP2005105367A High yield ratio and high strength cold-rolled steel plate and high yield ratio and high strength galvanized steel plate excellent in weldability and ductility, and high yield ratio and high strength alloyed galvanized steel plate and its manufacturing method 有权
标题翻译：高韧性和高强度冷轧钢板，高强度和高强度优质钢板优良的焊接性和耐磨性，高合金率和高强度合金钢化板及其制造方法
公开(公告)号：JP2005105367A
公开(公告)日：2005-04-21
申请号：JP2003341456
申请日：2003-09-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： YOSHINAGA NAOKI , SAKUMA KOJI , HIWATARI SHUNJI , ITAMI ATSUSHI
IPC分类号： B21B3/00 , C21D9/46 , C22C38/00 , C22C38/14 , C22C38/58 , C23C2/02 , C23C2/06 , C23C2/26 , C23C2/28
摘要： PROBLEM TO BE SOLVED: To provide a high yield ratio and high strength cold-rolled steel plate and a high yield ratio and high strength galvanized steel plate having high weldability and ductility, and to provide a high yield ratio and high strength alloyed galvanized steel plate and its manufacturing method.
SOLUTION: The high yield ratio and high strength cold-rolled steel plate having excellent weldability and ductility is a steel containing, by mass%, over 0.030 to less than 0.10 of C, 0.35 to 0.80 of Si, 1.7 to 3.2 of Mn, 0.001 to 0.02 of P, 0.0001 to 0.006 of S, ≤0.060 of Al, 0.0001 to 0.0070 of N, 0.01 to 0.055 of Ti, 0.012 to 0.055 of Nb, 0.07 to 0.55 of Mo, 0.0005 to 0.0040 of B and the balance of iron and inevitable impurities, and the steel has the yield ratio of 0.64 or more and less than 0.90,
摘要翻译：要解决的问题：为了提供高屈服比和高强度冷轧钢板以及具有高焊接性和延展性的高屈服比和高强度镀锌钢板，并且提供高屈服比和高强度合金化镀锌钢板及其制造方法。解决方案：具有优异的焊接性和延展性的高屈服比和高强度冷轧钢板是以质量％计含有C：0.030至小于0.10的Si，0.35至0.80的Si，1.7至3.2的 Mn：0.001〜0.02，P：0.0001〜0.006，Al：0.0002〜0.0070，N：0.01〜0.055，Nb：0.012〜0.055，Mo：0.07〜0.55，B：0.0005〜0.0040，铁和不可避免的杂质的平衡，并且在对应于钢的1/8厚度的层中，钢在ä110}面上的屈服比为0.64以上且小于0.90，<1.0 X射线强度比平板并平行于板面，≥780MPa的最高拉伸强度（TS）。版权所有（C）2005，JPO＆NCIPI

5. 发明专利

JP2005105361A High yield ratio and high strength hot rolled steel plate and high yield ratio and high strength galvanized steel plate excellent in weldability and ductility, and high yield ratio and high strength alloyed galvanized steel plate and its manufacturing method 有权
标题翻译：高合金钢和高强度热轧钢板，高合金钢和高强度钢化玻璃优良的焊接性和韧性，高合金率和高强度合金钢化钢板及其制造方法
公开(公告)号：JP2005105361A
公开(公告)日：2005-04-21
申请号：JP2003341152
申请日：2003-09-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： YOSHINAGA NAOKI , SAKUMA KOJI , HIWATARI SHUNJI , ITAMI ATSUSHI
IPC分类号： C23C2/02 , C21D9/46 , C22C38/00 , C22C38/14 , C22C38/58 , C23C2/06 , C23C2/26
摘要： PROBLEM TO BE SOLVED: To provide a high yield ratio and high strength hot rolled steel plate and a high yield ratio and high strength galvanized steel plate, both having excellent weldability and ductility, and to provide a high yield ratio and high strength alloyed galvanized steel plate and its manufacturing method.
SOLUTION: The high yield ratio and high strength hot rolled steel plate having excellent weldability and ductility is a steel containing, by mass%, over 0.030 to less than 0.10 of C, 0.35 to 0.80 of Si, 1.7 to 3.2 of Mn, 0.001 to 0.02 of P, 0.0001 to 0.006 of S, ≤0.060 of Al, 0.0001 to 0.0070 of N, 0.01 to 0.055 of Ti, 0.012 to 0.055 of Nb, 0.07 to 0.55 of Mo, 0.0005 to 0.0040 of B and the balance of iron and inevitable impurities, and the steel has the yield ratio of 0.68 or more and less than 0.92, ≥1.0 X-ray intensity ratio on a {110} plane in a layer at a depth corresponding to 1/8 thickness of the steel plate and parallel to the plate face, and ≥780 MPa highest tensile strength (TS).
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供高屈服比和高强度热轧钢板以及具有优异的可焊性和延展性的高屈服比和高强度镀锌钢板，并且提供高屈服比和高强度合金镀锌钢板及其制造方法。解决方案：具有优异的焊接性和延展性的高屈服比和高强度热轧钢板是以质量％计含有C：0.030以上且小于0.10的Si，0.35〜0.80的Si，1.7〜3.2的Mn ，P：0.001〜0.02，S：0.0001〜0.006，N：0.0001〜0.0070，Ti：0.01〜0.055，Nb：0.012〜0.055，Mo：0.07〜0.55，B：0.0005〜0.0040 的铁和不可避免的杂质，并且在对应于钢板的1/8厚度的层中，在aa110}面上钢的屈服比为0.68以上且小于0.92，≥1.0的X射线强度比平行于板面，≥780MPa的最高拉伸强度（TS）。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JPH11279693A Good workability/high strength hot rolled steel sheet excellent in baking hardenability and its production 失效
标题翻译：良好的工作能力/高强度热轧钢板优良的耐用性及其生产
公开(公告)号：JPH11279693A
公开(公告)日：1999-10-12
申请号：JP8180498
申请日：1998-03-27
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SAKUMA KOJI , HIWATARI SHUNJI , MURASATO AKINOBU
IPC分类号： C21D9/46 , C22C38/00 , C22C38/06 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To obtain a steel sheet having stable baking hardenability as well as high strength and good workability by incorporating specified amounts of C, Si, Mn, P, S, Al and N into a steel and specifying the relation between the contents of Si and P.
SOLUTION: The compsn. of a steel is composed of, by weight, 0.05 to 0.18% C, 0.4 to 1.8% Si, 1.0 to 2.5% Mn, ≤0.03% P, ≤0.02% S, 0.005 to 0.5% Al, ≤0.0060% N, and the balance Fe with inevitable impurities. Also, 50≤(%Si)/(%P)≤200 is satisfied. If required, 0.0002 to 0.0020% B is furthermore incorporated therein. Or, one or more kinds among 0.02 to 0.8% Cr, 0.002 to 0.03% Ti and 0.002 to 0.03% Nb are moreover incorporated therein. This steel slab is subjected to finish rolling at ≥Ar
3 point, is cooled at a cooling rate of 3 to 50°C/sec to from 750 to 600°C, is coiled at 400 to 570°C and is incorporated with, by volume, ≥50% ferrite and 3 to 25% martensite and residual austenite.
COPYRIGHT: (C)1999,JPO
摘要翻译：要解决的问题：为了通过在钢中加入规定量的C，Si，Mn，P，S，Al和N，获得具有稳定的烘烤淬透性以及高强度和良好加工性的钢板，并且指定内容物的Si和P.解决方案：compsn。的钢由0.05〜0.18％的C，0.4〜1.8％的Si，1.0〜2.5％的Mn，0.03％的P，<= 0.02％的S，0.005〜0.5％的Al，≤= 0.0060％ N，余量为Fe与不可避免的杂质。另外，满足50 <=（％Si）/（％P）<= 200。如果需要，还加入0.0002至0.0020％B。或者，还含有0.02〜0.8％的Cr，0.002〜0.03％的Ti和0.002〜0.03％的Nb中的一种或多种。将该钢坯在> = Ar3点进行精轧，以3〜50℃/秒的冷却速度冷却至750〜600℃，在400〜570℃卷取，体积比≥50％的铁素体和3〜25％的马氏体和残余奥氏体。

7. 发明专利

JP2011111675A HIGH STRENGTH STEEL SHEET EXCELLENT IN HYDROGEN EMBRITTLEMENT RESISTANCE AND HAVING THE MAXIMUM TENSILE STRENGTH OF ≥900 MPa, METHOD FOR PRODUCING HIGH STRENGTH COLD ROLLED STEEL SHEET, AND METHOD FOR PRODUCING HIGH STRENGTH GALVANIZED STEEL SHEET 有权
标题翻译：高强度耐腐蚀性和高达> 900MPa的最大拉伸强度的高强度钢板，用于生产高强度冷轧钢板的方法，以及生产高强度钢板的方法
公开(公告)号：JP2011111675A
公开(公告)日：2011-06-09
申请号：JP2009272074
申请日：2009-11-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： AZUMA MASASHI , SUZUKI NORIYUKI , MARUYAMA NAOKI , MURASATO AKINOBU , SAKUMA KOJI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/14 , C22C38/58 , C23C2/06 , C25D5/26
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel sheet having excellent hydrogen embrittlement resistance, and a method for producing the same. SOLUTION: The high strength steel sheet excellent in hydrogen embrittlement resistance and having the maximum tensile strength of ≥900 MPa is composed of a steel having a composition comprising, by mass, 0.07 to 0.25% C, 0.3 to 2.50% Si, 1.5 to 3.0% Mn, 0.005 to 0.09% Ti, 0.0001 to 0.01% B, 0.001 to 0.03% P, 0.0001 to 0.01% S, ≤2.50% Al, 0.0005 to 0.0100% N and 0.0005 to 0.007% O, and the balance iron with inevitable impurities. The inside of the steel sheet includes a hard structure including ferrite as the main phase and martensite with a block size of ≤1 μm, and the surface layer of the steel sheet is composed of a decarburized layer with a thickness of ≥0.5 μm in which the volume ratio of the above hard structure is ≤80% the volume ratio of a hard structure included at the position of the 1/4 thickness in the steel sheet. The method for producing the same is also disclosed. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：解决的问题：提供耐氢脆性优异的高强度钢板及其制造方法。解决方案：耐氢脆性优异并且最大拉伸强度≥900MPa的高强度钢板由具有以质量计0.07〜0.25％C，0.3〜2.50％Si， 1.5〜3.0％Mn，0.005〜0.09％Ti，0.0001〜0.01％B，0.001〜0.03％P，0.0001〜0.01％S，≤2.50％Al，0.0005〜0.0100％N，0.0005〜0.007％O，余量铁与不可避免的杂质。钢板的内部包括以铁素体为主相的硬质结构，块尺寸≤1μm的马氏体，钢板的表层由厚度≥0.5μm的脱碳层构成，其中，上述硬质结构的体积比在钢板中的1/4厚度位置处的硬质结构的体积比为≤80％。还公开了其制造方法。版权所有（C）2011，JPO＆INPIT

8. 发明专利

JP2007231369A High-strength cold rolled steel, high-strength hot dip galvanized steel sheet and high-strength galvannealed steel sheet having excellent formability and weldability, method for producing high-strength cold rolled steel sheet, method for producing high-strength hot dip galvanized steel sheet and method for producing high-strength galvannealed steel sheet 有权
标题翻译：高强度冷轧钢，高强度热镀锌钢板和具有优异的可轧性和焊接性的高强度钢铁钢板，生产高强度冷轧钢板的方法，生产高强度热镀锌钢板的方法以及生产高强度钢筋钢板的方法
公开(公告)号：JP2007231369A
公开(公告)日：2007-09-13
申请号：JP2006054717
申请日：2006-03-01
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： AZUMA MASASHI , YOSHINAGA NAOKI , HIWATARI SHUNJI , YONEMURA SHIGERU , SAKUMA KOJI
IPC分类号： C22C38/00 , B21B1/22 , B21B1/26 , B21B3/00 , C21D9/46 , C22C38/14 , C22C38/38 , C23C2/06 , C23G1/08
摘要： PROBLEM TO BE SOLVED: To provide a high-strength cold rolled steel sheet having the maximum tensile strength (TS) of ≥980 MPa, and having excellent ductility, hole expansibility, bendability and spot weldability.
SOLUTION: The high-strength cold rolled steel sheet has a composition comprising, by mass, 0.075 to
摘要翻译：要解决的问题：提供具有最大拉伸强度（TS）≥980MPa的高强度冷轧钢板，并且具有优异的延展性，孔扩展性，弯曲性和点焊性。解决方案：高强度冷轧钢板具有质量分数为0.075〜0.1％的Si，Si：0.4〜0.8％，Mn：1.9〜2.3％，Mo：0.1〜0.35％，Mo：0.014〜0.029％ Ti，0.0001〜0.0045％B，≤0.04％P，≤0.01％S，≤0.1％Al，≤0.01％N，0.001〜0.0045％O，余量为Fe与不可避免的杂质。版权所有（C）2007，JPO＆INPIT

9. 发明专利

JP2006274378A High yield ratio high strength cold rolled steel sheet, high yield ratio high strength hot dip galvanized steel sheet, high yield ratio high strength alloyed hot dip galvanized steel sheet, and method for producing them 有权
标题翻译：高强度高强度冷轧钢板，高强度高强度热镀锌钢板，高合金高强度合金热镀锌钢板，及其生产方法
公开(公告)号：JP2006274378A
公开(公告)日：2006-10-12
申请号：JP2005097155
申请日：2005-03-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： YOSHINAGA NAOKI , AZUMA MASASHI , HIWATARI SHUNJI , YONEMURA SHIGERU , SAKUMA KOJI , ITAMI ATSUSHI
IPC分类号： C22C38/00 , C21D9/46 , C22C38/14 , C22C38/58 , C23C2/06
摘要： PROBLEM TO BE SOLVED: To provide a high yield ratio high strength cold rolled steel sheet, a high yield ratio high strength hot dip galvanized steel sheet and a high yield ratio high strength alloyed hot dip galvanized steel sheet combining the tensile highest strength of ≥780 MPa, a high yield ratio, and weldability and ductility suitable to an automobile body skeleton part, and to provide methods for producing them.
SOLUTION: The high yield ratio high strength cold rolled steel sheet has a composition comprising, by mass, >0.028 to
摘要翻译：要解决的问题：为了提供高屈服比的高强度冷轧钢板，高屈服比高强度热浸镀锌钢板和高屈服比高强度合金化热浸镀锌钢板，结合拉伸最高强度 ≥780MPa，高屈服比，适用于汽车车身骨架部的焊接性和延展性，提供制造方法。解决方案：高屈服比高强度冷轧钢板具有以下组成：质量分数为：> 0.028〜0.044％的C，<0.8％的Si，1.9〜2.3％的Mn，0.001〜0.035％的P，0.0001〜 0.013％S，≤0.1％Al，0.0001〜0.008％N，0.012〜0.029％Ti，0.029〜0.042％Nb，0.05〜0.25％Mo和0.0008〜0.0038％B，余量为铁与不可避免的杂质。版权所有（C）2007，JPO＆INPIT

10. 发明专利

JP2006265607A High strength cold rolled steel sheet, high strength hot dip galvanized steel sheet, high strength alloyed hot dip galvannealed steel sheet, production method of high strength cold rolled steel sheet, production method of high hot dip galvannealed steel sheet, and production method of high strength alloyed galvannealed steel sheet 有权
标题翻译：高强度冷轧钢板，高强度热镀锌钢板，高强度合金热镀锌钢板，高强度冷轧钢板的生产方法，高热镀锌钢板的生产方法和高强度生产方法合金钢板
公开(公告)号：JP2006265607A
公开(公告)日：2006-10-05
申请号：JP2005083749
申请日：2005-03-23
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： YOSHINAGA NAOKI , AZUMA MASASHI , HIWATARI SHUNJI , SAKUMA KOJI , ITAMI ATSUSHI
IPC分类号： C22C38/00 , 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, high strength hot dip galvanized steel sheet, and high strength alloyed galvannealed steel sheet having maximum tensile strength of ≥780 MPa, an appropriately high yield ratio and suitable for skeleton sections of automobile bodies, a production method of a high strength cold rolled steel sheet, a production method of a high strength galvanized steel sheet, and a production method of a high strength alloyed galvannealed steel sheet. SOLUTION: The high strength cold rolled steel sheet contains, by mass%, >0.055 to COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：待解决的问题：为了提供高强度冷轧钢板，高强度热浸镀锌钢板和最高拉伸强度≥780MPa的高强度合金化合金化热镀锌钢板，适当高的屈服比，适用于汽车车身的骨架部，高强度冷轧钢板的制造方法，高强度镀锌钢板的制造方法以及高强度合金化合金化热镀锌钢板的制造方法。解决方案：高强度冷轧钢板以质量％计含有：> 0.055〜<0.095％的C，<1.2％的Si，1.9〜2.5％的Mn，0.001〜0.03％的P，0.0001〜0.008％的S，≤ 0.3％Al，0.0005〜0.06％N，0.014〜0.028％Ti，0.34〜0.046％Nb，0.005〜0.27％Mo，0.0006〜0.0026％B，0.0005〜0.0045％O，余量为铁和不可避免的杂质。版权所有（C）2007，JPO＆INPIT

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