孙世豪,李洲,邓想涛,石如星,徐流杰

• 1:河南科技大学材料科学与工程学院
• 2:东北大学轧制技术及连轧自动化国家重点试验室
• 3:洛阳中重铸锻有限责任公司

摘要(Abstract)：

采用真空冶炼技术制备了00Cr11Ni8Co7Mo3马氏体钢，经过锻造、1000℃固溶处理和800℃二次固溶处理后，研究了不同温度(300～600℃)时效处理对其微观组织和力学性能的影响。结果表明：当时效温度为500℃时，试验钢中的马氏体板条的平均宽度为8.34μm,在马氏体板条之间生成了5.9 vol%薄膜状的逆转变奥氏体，此时试验钢的力学性能表现出最佳的强韧性匹配，室温和低温(-196℃)屈服强度分别为1251.6和1508.1 MPa,室温和低温(-196℃)冲击吸收能量分别为96.2和43.1 J;当时效温度为400℃时，马氏体板条宽度增加至9.65μm,且基体中无明显逆转变奥氏体生成，室温以及低温(-196℃)冲击吸收能量最低，分别为66.2和25.2 J;当时效温度升高至600℃时，马氏体板条平均宽度降低至5.10μm,逆转变奥氏体相体积分数增至13.8 vol%,由于部分逆转变奥氏体出现了较大的块状结构，无法有效抑制裂纹扩展，导致试验钢的冲击韧性下降，室温和低温(-196℃)冲击韧性分别下降至90.4和33.8 J。

关键词(KeyWords)： 马氏体时效不锈钢;热处理;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2022YFB3705300);; 河南省重点研发专项(231111230400)

作者(Author): 孙世豪,李洲,邓想涛,石如星,徐流杰

DOI: 10.13289/j.issn.1009-6264.2024-0536

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