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VACUUM ›› 2025, Vol. 62 ›› Issue (2): 100-104.doi: 10.13385/j.cnki.vacuum.2025.02.15

• Vacuum Metallurgy and Thermal Engineering • Previous Articles    

Effect of Vacuum Aging Process on Hardness and Microstructure of ZG0Cr17Ni4Cu3Nb and 0Cr17Ni4Cu4Nb

WANG Man1, ZHAN Chunming2, SHI Guomei1, WANG Zhe1   

  1. 1. AECC Shenyang Liming Aero-Engine Co., Ltd., Shenyang 110043, China;
    2. Shenyang Vacuum Technology Institute Co., Ltd., Shenyang 110042, China
  • Received:2024-11-20 Online:2025-03-25 Published:2025-03-24

Abstract: 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.

Key words: martensite stainless steel, vacuum aging, hardness, microstructure

CLC Number:  TG156.9

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