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首页> 外国专利> ULTRAHIGH STRENGTH STEEL SHEET HAVING EXCELLENT HYDROGEN BRITTLENESS RESISTANCE, METHOD FOR PRODUCING THE SAME, METHOD FOR PRODUCING ULTRAHIGH STRENGTH HOT DIP GALVANIZED STEEL SHEET AND METHOD FOR PRODUCING ULTRAHIGH STRENGTH HOT DIP ALLOYED GALVANIZED STEEL SHEET

ULTRAHIGH STRENGTH STEEL SHEET HAVING EXCELLENT HYDROGEN BRITTLENESS RESISTANCE, METHOD FOR PRODUCING THE SAME, METHOD FOR PRODUCING ULTRAHIGH STRENGTH HOT DIP GALVANIZED STEEL SHEET AND METHOD FOR PRODUCING ULTRAHIGH STRENGTH HOT DIP ALLOYED GALVANIZED STEEL SHEET

机译：具有出色的耐氢脆性的超高强度钢板，制备方法相同，制造高强度热浸镀锌钢板的方法以及制造高强度热浸镀锌合金的方法

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PROBLEM TO BE SOLVED: To provide an ultrahigh strength steel sheet in which defects caused by hydrogen are prevented, and having excellent hydrogen brittleness resistance, to provide a method for producing the same, to provide a method for producing an ultrahigh strength hot dip galvanized steel sheet, and to provide a method for producing an ultrahigh strength hot dip alloyed galvanized steel sheet.;SOLUTION: Regarding the ultrahigh strength steel sheet, in a steel sheet having a composition comprising, by mass, 0.06 to 0.25% C, ≤2.0% Si, ≤3.0% Mn, ≤2.0% Al, ≤3.0% Cr, ≤0.04% P, ≤0.01% S, ≤0.01% O and ≤0.01% N, in which the total content of Si, Mn, Al and Cr is ≥0.3%, and the balance iron with inevitable impurities, oxide is comprised in 0.01 to 30 mass% by the average content to one or more kinds among the crystal grain boundaries at the surface layer within 10 μm from the surface, the inside of the crystal grains, and the crystal grain boundaries and the inside of the crystal grains.;COPYRIGHT: (C)2007,JPO&INPIT
机译：解决的问题：提供一种防止氢引起的缺陷并且具有优异的耐氢脆性的超高强度钢板，提供其制造方法，提供一种制造超高强度热浸镀锌钢板的方法。 ;解决方案：关于超高强度钢板，在具有按质量计0.06至0.25％C，＆le; 2.0的组成的钢板中％Si，3.0％Mn，2.0％Al，3.0％Cr，0.04％P，0.01％S，0.01％O和0.01％N，其中总含量Si，Mn，Al和Cr的含量为0.3ge％以上，且具有不可避免的杂质的余量的铁，氧化物相对于表层内的表面层的晶界中的一种或多种平均含量为0.01〜30质量％。从表面，晶粒的内部，晶粒的边界和晶粒内部;版权所有：（C）2007，日本特许会计师事务所

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