研究了淬火+回火(No.1钢)及淬火+冷处理+回火(No.2钢)两种处理工艺下,超级马氏体不锈钢组织和性能的差异.结果表明:两钢中基体组织均为回火马氏体,但经过冷处理的No.2钢马氏体板条更平直,尺寸更小.在No.1、No.2钢中,随回火温度的升高,逆变奥氏体含量的变化趋势都为先增高后降低.在No.1、No.2钢中逆变奥氏体达到最大值的回火温度分别为650℃,700℃.No.2钢中Ni元素富集点含量比No.1钢低,但Ni富集点数比No.1钢多.No.1、No.2钢的硬度变化趋势都为先快速降低后缓慢回升,但在相同回火温度下,No.2钢的硬度值更低.
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