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Invention Publication
CN101506400A 马氏体系不锈钢 无效 - 驳回 转让 复审申请

马氏体系不锈钢
Abstract:
本发明提供一种马氏体系不锈钢，其包括以质量％计C：0.010～0.030％、Mn：0.30～0.60％、P：0.040％以下、S：0.0100％以下、Cr：10.00～15.00％、Ni：2.50～8.00％、Mo：1.00～5.00％、Ti：0.050～0.250％、V：0.25％以下、N：0.07％以下、Si：0.50％以下、Al：0.10％以下中的1种以上、其余为Fe及杂质。本发明的马氏体系不锈钢还满足式(1)，具有758～862MPa的屈服强度。通过以上结构，马氏体系不锈钢具有110ksi级(屈服强度758MPa～862MPa)的强度，且拉伸强度减去屈服强度而得到的值为20.7MPa以上。6.0≤Ti/C≤10.1(1)。
Abstract(English):

A martensitic stainless steel which contains, in terms of mass%, 0.010-0.030% C, 0.30-0.60% Mn, up to 0.040% P, up to 0.0100% S, 10.00-15.00% Cr, 2.50-8.00% Ni, 1.00-5.00% Mo, 0.050-0.250% Ti, up to 0.25% V, and up to 0.07% N, and contains at least either of up to 0.50% Si and up to 0.10% Al, the remainder being iron and incidental impurities. The martensitic stainless steel satisfies the relationship (1) and has a yield strength of 758-862 MPa. Due to this constitution, this martensitic stainless steel has a strength of the 110-ksi class (yield strength of 758-862 MPa), and the value obtained by subtracting the yield strength from the tensile strength is 20.7 MPa or more. 6.0<=Ti/C<=10.1 (1).

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