研究了06Cr15Ni5WMoVNb马氏体沉淀硬化不锈钢高温时效α→γ逆转变奥氏体对力学性能的影响.研究结果表明:随时效温度上升逆转变奥氏体增多,致使强度下降,尤其是屈服强度快速下降.630℃时效后奥氏体体积分数达到峰值,对应的强度最低、延伸率和断面收缩率最高.630℃以上时效逆转变奥氏体的稳定性下降,冷却到室温后转变为马氏体,富Cr的M23C6碳化物析出,使最终奥氏体体积分数低于固溶态.
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