Heat Treatment of Metals ›› 2021, Vol. 46 ›› Issue (1): 80-83.DOI: 10.13251/j.issn.0254-6051.2021.01.015

• PROCESS RESEARCH • Previous Articles     Next Articles

Application of cryogenic treatment in ZL204 aluminum alloy

Li Jingmin, Li Fengchun, Teng Yu, Zhou Wenfeng, Tang Guangping   

  1. Institute of Machinery Manufacturing Technology,China Academy of Engineering Physics,Mianyang Sichuan 621900,China
  • Received:2020-06-20 Online:2021-01-25 Published:2021-01-26

Abstract: Influence of cryogenic treatment on mechanical properties and residual stress relief effect of ZL204 aluminum alloy was studied.The results show that the tensile strength,yield strength and elongation of the alloy increase when directly cryogenic treated after solution treatment and then artificial aged,and the effect of residual stress relief effect is better than the traditional relief aging and cycle heat treatment after aging.The best residual stress elimination process for ZL204 aluminum alloy is solution treated at 540 ℃ for 9 h with 60 ℃ water quenching,cryogenic treated at -196 ℃ for 1 h then stress relief aged for 1 h,and artificial aged at 175 ℃ for 3 h with air cooling.

Key words: cryogenic treatment, heat treatment, ZL204 aluminum alloy, residual stress

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