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1. 发明专利

JP2013227614A High strength steel sheet having high toughness, high workability, high moldability, and excellent delayed fracture property caused by hydrogen embrittlement, and method for manufacturing the same 有权
$High strength steel sheet having high toughness, high workability, high moldability, and excellent delayed fracture property caused by hydrogen embrittlement, and method for manufacturing the same$
标题翻译：具有高韧性，高可加工性，高可塑性，以及由氢腐蚀引起的极好的延迟断裂性能的高强度钢板及其制造方法
公开(公告)号：JP2013227614A
公开(公告)日：2013-11-07
申请号：JP2012099947
申请日：2012-04-25
申请人： Nippon Steel & Sumitomo Metal Corp , 新日鐵住金株式会社
发明人： SEKIDO YOSHITO , KAWASAKI KAORU , HAYASHI KUNIO , FUJITA NOBUHIRO
IPC分类号： C22C38/00 , B21D22/20 , C21D1/18 , C21D9/00 , C21D9/46 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel sheet having high toughness, high workability, and excellent delayed fracture property caused by hydrogen embrittlement, and a method for manufacturing the same.SOLUTION: A high strength steel sheet includes C: 0.20-0.35%, Si: 0.05-1.00%, Mn: 0.20-3.50%, P: 0.015% or lower, Al: 0.005-0.300%, Ti: 0.001-0.050%, B: 0.0002-0.0050%, one or more of V and Cr: 0.001-3.000% in total, one or more of Sn, Ni, and Cu: 0.005-2% in total, and one or more of Ca, Mg, Y, As, Sb, and REM: 0.0005-0.05% in total, wherein, after hot stamping, a prior austenite grain size is 20 μm or less and 97% or more martensite is included. The steel sheet is heated to a temperature range of an Ac3 point to 950°C at a temperature rising rate of 5-100°C/s, and an Ar3-350°C is cooled at a cooling rate of 50°C/s or higher to be hot stamped.
摘要翻译：要解决的问题：提供一种高韧性，高加工性和由氢脆引起的优异的延迟断裂性的高强度钢板及其制造方法。解决方案：高强度钢板包括C：0.20-0.35 ％，Si：0.05〜1.00％，Mn：0.20〜3.50％，P：0.015％以下，Al：0.005〜0.300％，Ti：0.001-0.050％，B：0.0002〜0.0050％ Cr：总计0.001-3.000％，Sn，Ni和Cu中的一种或多种：总计0.005-2％，Ca，Mg，Y，As，Sb和REM中的一种或多种：0.0005-0.05％总计，其中，在热冲压之后，原奥氏体晶粒度为20μm以下，包含97％以上的马氏体。将钢板以5-100℃/ s的升温速度加热到Ac3点至950℃的温度范围，并将Ar3-350℃以50℃/ s的冷却速率冷却或更高要烫印。

2. 发明专利

JP2013204090A Tailored blank for hot stamping 有权
标题翻译：定制空白烫印
公开(公告)号：JP2013204090A
公开(公告)日：2013-10-07
申请号：JP2012074222
申请日：2012-03-28
申请人： Nippon Steel & Sumitomo Metal Corp , 新日鐵住金株式会社
发明人： MIYAZAKI YASUNOBU , NAITO YASUAKI , KAWASAKI KAORU , YOSHINAGA TAKAHIRO
IPC分类号： C22C38/00 , B23K26/20 , B23K103/16 , C22C21/02 , C22C38/06 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To provide a tailored blank for hot stamping, which is formed by butt laser-welding aluminum-plated steel sheets as such without removing the plating layer of the area to be welded, and has a sufficient weld joint strength.SOLUTION: In a tailored blank for hot stamping, formed by butt laser-welding aluminum-plated steel sheets of different strengths, the welding is performed by combining the kinds of the steel sheets to be butt-welded, so that: the average Al concentration of the weld metal formed by butt laser-welding is 0.3 mass%-1.5 mass%; the Acpoint temperature of the weld metal is 1,250°C or less; and the value of multiplication between the hardness of the weld metal after hot stamping and the thickness of the thinnest area of the weld metal is greater than the value of multiplication between the hardness of a low-strength side of the steel sheet after hot stamping and the thickness of the sheet.
摘要翻译：要解决的问题：为了提供热冲压的定制坯料，其通过对接激光焊接镀铝钢板而形成，而不去除待焊接区域的镀层，并且具有足够的焊接接合强度。：在通过对接激光焊接不同强度的镀铝钢板形成的用于热冲压的定制坯料中，通过组合要对接的钢板的种类来进行焊接，使得：平均Al浓度通过对接激光焊接形成的焊接金属为0.3质量％〜1.5质量％焊缝金属的Acpoint温度为1250℃以下; 热冲压后的焊接金属的硬度与焊接金属的最薄区域的厚度之间的乘积值大于热冲压后的钢板的低强度侧的硬度和片材的厚度。

3. 发明专利

JP2013122076A Hot stamping molding excellent in balance of strength and toughness, method for manufacturing the same, and method for manufacturing steel plate for hot stamping molding 有权
标题翻译：强度和韧性平衡的热冲压成型，其制造方法以及制造用于热冲压成型的钢板的方法
公开(公告)号：JP2013122076A
公开(公告)日：2013-06-20
申请号：JP2011271311
申请日：2011-12-12
申请人： Nippon Steel & Sumitomo Metal Corp , 新日鐵住金株式会社
发明人： KAWASAKI KAORU , SANO KOICHI
IPC分类号： C22C38/00 , B21B1/26 , B21B3/00 , C21D1/18 , C21D9/00 , C21D9/46 , C22C21/02 , C22C38/38 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a hot stamping molding which is obtained by using a steel plate having a thickness of 4 mm or more, has high strength and good toughness after quenching, and is used for frame members of a truck or the like.SOLUTION: The hot stamping molding is composed of a steel containing, by mass, 0.28-0.35% of C, 1-3% of Mn+Cr, 0.005-0.1% of Ti, 0.005-0.1% of Nb, 0.005-0.03% of REM, and 0.003-0.007% of O, and is characterized in that the ratio of the rolling direction to the thickness direction is 1.3 or more and the average grain diameter is 6 μm or less, in the prior austenite grain diameter after hot stamping, martensite is contained in an amount of 90% or more, and the tensile strength is 1,370 MPa or more. The steel plate for the hot stamping molding is manufactured by heating a slab containing the components to a temperature range of 1,250°C or less, then finishing finish-rolling under conditions that the temperature in the final stand is in the range of 800-900°C and the total rolling reduction in the stands from two preceding stands is 60% or more, starting cooling within 1 s, and winding up the resulting slab at a temperature of 600°C or less.
摘要翻译：待解决的问题：为了提供通过使用厚度为4mm以上的钢板而获得的热冲压成形体，在淬火后具有高强度和良好的韧性，并且用于卡车的框架部件或类似。解决方案：热冲压成型由以质量计含有C：0.28-0.35％，Mn + Cr 1-3％，Ti 0.005〜0.1％，Nb：0.005〜0.1％，0.005 -0.03％的REM和0.003-0.007％的O，其特征在于，轧制方向与厚度方向的比例为1.3以上，平均粒径为6μm以下，在现有的奥氏体晶粒直径在热冲压之后，马氏体含量为90％以上，拉伸强度为1370MPa以上。用于热冲压成型的钢板通过将含有组分的板坯加热到1250℃或更低的温度范围来制造，然后在最终机架的温度在800-900的范围内的条件下进行精轧 ℃，并且从两个先前机架的机架中的总轧制压下率为60％以上，1秒内开始冷却，并在600℃以下的温度下卷绕。版权所有（C）2013，JPO＆INPIT

4. 发明专利

JP2013094815A Hot shearing method 有权
标题翻译：热剪切方法
公开(公告)号：JP2013094815A
公开(公告)日：2013-05-20
申请号：JP2011240186
申请日：2011-11-01
申请人： Nippon Steel & Sumitomo Metal Corp , 新日鐵住金株式会社
发明人： MATSUNO TAKASHI , SUZUKI TAMAKI , EGAMI TORU , SETO KOJI , SEKIDO YOSHITO , KAWASAKI KAORU
IPC分类号： B21D28/24 , B21D22/20 , B21D24/00 , B21D28/34
CPC分类号： B21D35/001
摘要： PROBLEM TO BE SOLVED: To provide a hot shearing method by which the hardness of a sheared section is made uniform and also the tensile residual stress of the sheared section is reduced, about a hot shearing method by which a heated metal plate is sheared in a die, simultaneously quenched in the die and does not pass through a hot press forming process and a hot shearing method by which the heated metal plate is press-formed in the die, sheared in the die simultaneously with or just after the shearing work, quenched simultaneously with the shearing work and which is passed through a hot press forming process.SOLUTION: In this hot shearing method by which the heated metal plate is sheared in the die and quenched in the die simultaneously with the shearing work, the metal plate 1 is sheared by using a punch 10 which includes a base shaft part 20 in which the diameter is constant in the axial direction and an inverse tapered part 21 where is continued to the base shaft part, is made into a club shape toward the tip of the punch.
摘要翻译：要解决的问题：提供一种热剪切方法，其中剪切部分的硬度均匀，并且剪切部分的拉伸残余应力也减小，约热加工金属板的热剪切方法在模具中剪切，同时在模具中淬火并且不通过热压成型工艺和热剪切方法，通过该方法将加热的金属板在模具中压制成型，同时或刚刚剪切后在模具中剪切工作，与剪切工作同时淬火并通过热压成型工艺。解决方案：在这种热剪切方法中，加热的金属板在模具中剪切并在剪切作用下同时在模具中淬火，金属板1通过使用冲头10进行剪切，冲头10包括基轴部分20 其中直径在轴向方向上是恒定的，并且向基轴部分延续的倒锥形部分21朝向冲头的尖端形成球棒状。版权所有（C）2013，JPO＆INPIT

5. 发明专利

JP2014122398A Hot stamp molded article excellent in strength and hydrogen embrittlement resistance and manufacturing method of hot stamp molded article 有权
标题翻译：热冲压模具制品优良强度和耐腐蚀性能及制造方法
公开(公告)号：JP2014122398A
公开(公告)日：2014-07-03
申请号：JP2012279668
申请日：2012-12-21
申请人： Nippon Steel & Sumitomo Metal , 新日鐵住金株式会社
发明人： KAWASAKI KAORU , AZUMA MASASHI , ABUKAWA HARUKI
IPC分类号： C22C38/00 , B21D22/20 , C21D1/18 , C21D9/00 , C21D9/46 , C22C38/38 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel sheet for a hot stamp molded article and the hot stamp molded article excellent in tensile maximum strength of 1180 MPa or more and hydrogen embrittlement resistance, and to provide a manufacturing method thereof.SOLUTION: There is provided a hot stamp molded article having a structure containing residual austenite of 1% or more and less than 5%, martensite of 70% or more and martensite and bainite of total 95% or more and excellent in hydrogen embrittlement resistance of 1180 MPa or more after molding and there is also provided its manufacturing method by heating a steel sheet structure containing, by mass%, C:0.12 to 0.40%, Si:0.005 to 0.5%, Mn+Cr:1 to 3%, Al:0.005 to 10%, P:0.00.1 to 0.030%, S:0.000.1 to 0.0.1%, B:0.00.03 to 0.0.10%, O:0.000.1 to 0.007%, N:0.00.1 to 0.007% to a temperature range of Ac 3 point to 950°C with 2°C/s or more of a heating speed, and press molding with cooling with 100°C/s or more of a cooling speed in the temperature range of Ar3 to Ms-50°C, and 50°C/s or less of an average cooling speed between (Ms-5)°C to 100°C.
摘要翻译：要解决的问题：提供一种热压成型体用钢板和拉伸最大强度优异1180MPa以上且耐氢脆性优异的热压成型品，并提供其制造方法。具有含有1％以上且小于5％的马氏体，70％以上的马氏体和95％以上的马氏体和贝氏体的残余奥氏体的结构的热压成型体，其耐氢脆性优异为1180MPa以上并且还提供了以质量％计含有C：0.12〜0.40％，Si：0.005〜0.5％，Mn + Cr：1〜3％，Al：0.005〜10％的钢板结构体，，P：0.00.1〜0.030％，S：0.0001〜0.0.1％，B：0.00.03〜0.0.10％，O：0.000.1〜0.007％，N：0.001〜0.007％ Ac 3点至950℃的温度范围为2℃/ s以上的加热速度，在回火中以100℃/ s以上的冷却速度冷却成型 Ar3至Ms-50℃的范围，和（Ms-5）℃至100℃之间的平均冷却速度为50℃/ s以下。

6. 发明专利

JP2014118613A Hot stamp molded body excellent in strength and hydrogen embrittlement resistance and its manufacturing method 有权
标题翻译：热压成型体优良强度和耐腐蚀性及其制造方法
公开(公告)号：JP2014118613A
公开(公告)日：2014-06-30
申请号：JP2012275960
申请日：2012-12-18
申请人： Nippon Steel & Sumitomo Metal , 新日鐵住金株式会社
发明人： ABUKAWA HARUKI , AZUMA MASASHI , KAWASAKI KAORU
IPC分类号： C22C38/00 , B21D22/20 , C21D1/18 , C22C38/38 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a hot stamp molded body excellent in maximum tensile strength of 1180 MPa or more and hydrogen embrittlement resistance and to provide its manufacturing method.SOLUTION: There is provide a hot stamp molded body excellent in maximum tensile strength of 1180 MPa or more and hydrogen embrittlement resistance in which a structure of a steel plate containing, by mass%, C:0.12 to 0.40%, Si:0.005 to 2.0%, Mn+Cr:1 to 3%, Al:0.005 to 1.0%, P:0.001 to 0.030%, S:0.0001 to 0.01%, B:0.0003 to 0.010%, O:0.0001 to 0.007%, N:0.001 to 0.007% contains tempered martensite of 50% or more as an area ratio, a component of iron-based carbide contains Si or Al of total 0.05% or more as along or combination and the number density is 1×10/mmor more, and there is also provided a manufacturing method of the hot stamp molded body.
摘要翻译：要解决的问题：提供最大抗拉强度优异1180MPa以上和耐氢脆性优异的热压成型体，并提供其制造方法。提供一种热压成型体，其最大拉伸强度优异为1180 MPa以上，耐氢脆性，其中以质量％计含有C：0.12〜0.40％，Si：0.005〜2.0％，Mn + Cr：1〜3％，Al：0.005〜1.0％，P：0.001〜0.030％，S：0.0001〜0.01％，B：0.0003〜0.010％，O：0.0001〜0.007％，N：0.001〜0.007％含有面积比为50％以上的回火马氏体，铁基碳化物含有Si或Al总量为0.05％以上或组合，数密度为1×10 / mm以上，并且还提供了热压成型体的制造方法。

7. 发明专利

JP2013117464A Method for evaluating delayed fracture characteristic of high-strength steel plate 有权
$Method for evaluating delayed fracture characteristic of high-strength steel plate$
标题翻译：评估高强度钢板延迟断裂特性的方法
公开(公告)号：JP2013117464A
公开(公告)日：2013-06-13
申请号：JP2011265595
申请日：2011-12-05
申请人： Nippon Steel & Sumitomo Metal , 新日鐵住金株式会社
发明人： KAWASAKI KAORU , SEKIDO YOSHITO
IPC分类号： G01N33/20 , C25D3/22 , C25D5/12 , C25D5/26 , C25D21/02 , C25D21/12
摘要： PROBLEM TO BE SOLVED: To perform highly accurate measurement by improving inclusion capacity of diffusible hydrogen in a steel plate when evaluating a delayed fracture characteristic of the steel plate and avoiding the delayed fracture caused by the hydrogen that is a problem for practically using a hot stamp member.SOLUTION: The method is provided for evaluating a delayed fracture characteristic of a steel plate by measuring a limit amount of diffusible hydrogen of the steel plate including the diffusible hydrogen. For preventing emission of the hydrogen from the steel plate in which the diffusible hydrogen is included, the surface of the steel plate is galvanized by using ammonium chloride bath (aqueous solution containing zinc chloride: 100-150 g/L and ammonium chloride: 180-300 g/L) or potassium chloride bath (aqueous solution containing zinc chloride: 100-150 g/L and potassium chloride: 180-300 g/L) and by appropriately adjusting bath temperature, pH, a negative electrode density and a time.
摘要翻译：要解决的问题：通过在评估钢板的延迟断裂特性并避免由于实际使用的问题引起的氢的延迟断裂时，通过提高钢板中的可扩散氢的夹杂能力来进行高精度的测量热邮票会员解决方案：该方法用于通过测量包括可扩散氢的钢板的可扩散氢的极限量来评估钢板的延迟断裂特性。为了防止从含有扩散氢的钢板中排出氢，通过使用氯化铵浴（含氯化锌的水溶液：100-150g / L，氯化铵：180〜 300g / L）或氯化钾浴（含氯化锌水溶液：100-150g / L，氯化钾180-300g / L），适当调节浴温，pH值，负极密度和时间。版权所有（C）2013，JPO＆INPIT

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