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本文利用形变诱发马氏体相变和时效强化手段研制出一种形变诱发马氏体时效不锈钢00Cr12Ni5Mn8Cu2TiRE钢,经1050℃、0.5h固溶处理+80%冷变形+410℃、2.5h时效处理后,其σ_b≥2100MPa,ψ≥35%,δ≥4%;其耐腐蚀性能良好。该钢具有ε和α′二种诱发马氏体,当变形量达75%以上时基体主要为α′马氏体组织。文中分析了该类钢中强度指标与形变量(ε)、主要合金元素含量和α′马氏体体积分数(V_α′)之间的关系,并给出了相应的关系式。
In this paper, a strain-induced martensitic aging stainless steel 00Cr12Ni5Mn8Cu2TiRE steel was developed by means of deformation-induced martensitic transformation and aging strengthening. After treated by 1050 ℃, 0.5h solution treatment + 80% cold deformation + 410 ℃, 2.5h aging treatment , Its σ_b ≥ 2100MPa, ψ ≥ 35%, δ ≥ 4%; its corrosion resistance is good. The steel has ε and α ’induced martensite two, when the deformation of more than 75% of the matrix is mainly α’ martensite. In this paper, the relationship between strength index and deformation (ε), main alloying elements and α ’martensite volume fraction (V_α’) in this kind of steel is analyzed and the corresponding relation is given.