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11. 发明专利

JP2006283118A High tensile strength steel for building structure having excellent strength soundness after fire 有权
标题翻译：用于建筑结构的高强度钢在火灾后具有优异的强度声
公开(公告)号：JP2006283118A
公开(公告)日：2006-10-19
申请号：JP2005104424
申请日：2005-03-31
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： KAWABATA TOMOYA , ARIMOCHI KAZUSHIGE , OKAGUCHI HIDEJI , SASAKI MASAMICHI
IPC分类号： C22C38/00 , C21D8/02 , C22C38/38 , C22C38/58
CPC分类号： Y02P10/212
摘要： PROBLEM TO BE SOLVED: To provide a high tensile strength steel for a building structure having tensile strength in a class of ≥780 Mpa with little deterioration in yield stress in the case of being subjected to heat such as a fire, and to provide a method of inexpensively producing the steel. SOLUTION: The high tensile strength for a building structure comprises, by mass, 0.02 to 0.2% C, 0.01 to 0.5% Si, 0.4 to 2.5% Mn, 0.1 to 1% Cr, 0.1 to 1% Mo, 0.0003 to 0.005% B, 0.001 to 0.02% Nb and 0.001 to 0.1% Al, and the balance Fe with impurities in which the content of P is ≤0.05%, wherein the content of S is ≤0.008% and the content of N is ≤0.01%, also, the value expressed by the following formula (a) is ≤110, and the ratio of martensite is ≥80%: the formula (a) is 100-886×Nb(%)-12×Mo(%)+2.44×(R Fe /C(%)); wherein the atomic symbol in the formula is the content (mass%) of the element, and R Fe is the content (mass%) of Fe present as precipitates measured by an extraction residue method. The steel may contain one or more kinds selected from Cu, Ni, V, Ti, Ca, Mg, rare earth metals and Zr as well. In the production method, specified slag heating temperature, quenching conditions and heat recuperating conditions are applied. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供具有≥780Mpa级拉伸强度的建筑结构的高抗拉强度钢，在受到诸如火灾的热量的情况下几乎没有屈服应力的劣化，并且提供廉价生产钢的方法。解决方案：建筑结构的高拉伸强度按质量计包括：0.02〜0.2％的C，0.01〜0.5％的Si，0.4〜2.5％的Mn，0.1〜1％的Cr，0.1〜1％的Mo，0.0003〜 0.005％B，0.001〜0.02％Nb和0.001〜0.1％Al，余量为Fe含量为P≤0.05％的杂质，其中S含量≤0.008％，N含量≤0.01 ％，由下式（a）表示的值为≤110，马氏体比≥80％：式（a）为100-886×Nb（％）〜12×Mo（％）+ 2.44×（R 铁 / C（％））; 其中，式中的原子符号是元素的含量（质量％），R SB是通过萃取残留法测定的作为析出物存在的Fe的含量（质量％）。钢可以含有选自Cu，Ni，V，Ti，Ca，Mg，稀土金属和Zr中的一种或多种。在制造方法中，应用规定的炉渣加热温度，淬火条件和热回收条件。版权所有（C）2007，JPO＆INPIT

12. 发明专利

JP2006283117A High tensile strength steel having excellent plastic deformability after cold working, and method for producing the same 有权
标题翻译：冷加工后具有优异塑性变形性的高强度钢及其制造方法
公开(公告)号：JP2006283117A
公开(公告)日：2006-10-19
申请号：JP2005104406
申请日：2005-03-31
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： KAWABATA TOMOYA , ARIMOCHI KAZUSHIGE , OKAGUCHI HIDEJI , SASAKI MASAMICHI
IPC分类号： C22C38/00 , C21D6/00 , C21D8/00 , C22C38/38 , C22C38/58
CPC分类号： Y02P10/212
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel having a tensile strength of ≥780 MPa and a yield ratio of ≤90%, and to provide a method for producing the same. SOLUTION: The high tensile strength steel comprising, by mass, 0.02 to 0.2% C, 0.01 to 0.5% Si, 0.4 to 2.5% Mn, 0.1 to 1% Cr, 0.1 to 1% Mo, 0.01 to 0.035% Ti, 0.0003 to 0.005% B and 0.001 to 0.1% Al, and the balance Fe with impurities in which the content of P is ≤0.05%, the content of S is ≤0.008% and the content of N is ≤0.01%, also, the value expressed by the following formula (a) is ≤85, and the ratio of martensite is ≥80%: the formula (a) is 44.6+1086×Nb(%)+773×Ti(%)+2.44×(R Fe /C(%)); wherein the atomic symbol in the formula is the content (mass%) of the element; and R Fe is the content (mass%) of Fe present as precipitates measured by an extraction residue method. The steel may contain one or more kinds selected from Nb, Cu, Ni, V, Ca, Mg, rare earth metals and Zr as well. In the production method, specified slab heating temperature, quenching conditions and heat recuperating conditions are used. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供拉伸强度≥780MPa，屈服比≤90％的高强度钢，并提供其制造方法。解决方案：高强度钢，其包括质量为0.02至0.2％的C，0.01至0.5％的Si，0.4至2.5％的Mn，0.1至1％的Cr，0.1至1％的Mo，0.01至0.035％的Ti ，0.0003〜0.005％的B和0.001〜0.1％的Al，余量为Fe含量为P≤0.05％的杂质，S的含量≤0.008％，N的含量≤0.01％由下式（a）表示的值为≤85，马氏体比为≥80％：式（a）为44.6 + 1086×Nb（％）+ 773×Ti（％）+ 2.44×（R 铁 / C（％））; 其中式中的原子符号是元素的含量（质量％）; R SB是通过萃取残渣法测定的作为析出物存在的Fe的含量（质量％）。钢可以含有选自Nb，Cu，Ni，V，Ca，Mg，稀土金属和Zr中的一种或多种。在制造方法中，使用规定的板坯加热温度，淬火条件和热回收条件。版权所有（C）2007，JPO＆INPIT

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