摘要
对ZG0Cr17Ni4Cu3Nb和0Cr17Ni4Cu4Nb不锈钢进行真空时效处理,系统分析了不同时效温度(540~620℃)对其显微组织及力学性能的影响机制。结果表明:随着时效温度的升高,两种材料的硬度均呈现下降趋势。在相同时效工艺下,0Cr17Ni4Cu4Nb的硬度优于ZG0Cr17Ni4Cu3Nb。时效温度升高导致淬火马氏体基体发生回复与再结晶,促使逆转变奥氏体生成并扩展,进而提升了残余奥氏体含量并引起组织软化。此外,富铜相(ε-Cu)等沉淀相质点的析出与长大减弱了沉淀强化效应,进一步加剧了硬度的降低。
The effects of different aging temperatures(540-620℃)on microstructure and mechanical property of ZG0Cr17Ni4Cu3Nb and 0Cr17Ni4Cu4Nb precipitation-hardened martensitic stainless steels were studied by vacuum aging treatment.The results show that the hardness of both materials decreases with the gradual increase of aging temperature.Under the same aging conditions,the hardness of 0Cr17Ni4Cu4Nb is better than that of ZG0Cr17Ni4Cu3Nb.The increase of aging temperature promotes the recovery and recrystallization of quenched martensite matrix,and reverse austenite gradually forms and expands,resulting in the increase of retained austenite content and microstructure softening.In addition,the precipitation and growth of precipitated phase particles such as copper-rich phase(ε-Cu)weaken the precipitation strengthening effect and further aggravate the decrease of hardness.
作者
王蔓
战春鸣
施国梅
王哲
WANG Man;ZHAN Chunming;SHI Guomei;WANG Zhe(AECC Shenyang Liming Aero-Engine Co.,Ltd.,Shenyang 110043,China;Shenyang Vacuum Technology Institute Co.,Ltd.,Shenyang 110042,China)
出处
《真空》
2025年第2期100-104,共5页
Vacuum
关键词
马氏体不锈钢
真空时效
硬度
组织
martensite stainless steel
vacuum aging
hardness
microstructure
