Heat Treatment of Metals ›› 2021, Vol. 46 ›› Issue (8): 164-169.DOI: 10.13251/j.issn.0254-6051.2021.08.030

• PROCESS RESEARCH • Previous Articles     Next Articles

Effect of sensitization on hydrogen embrittlement sensitivity of 304 austenitic stainless steel in different states

Zhang Huiyun1,2, Meng Xianming1, Zheng Liuwei2,3, Liang Wei2,3   

  1. 1. Department of Mechanical Manufacturing Engineering, Shanxi Engineering Vocational College, Taiyuan Shanxi 030009, China;
    2. School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China;
    3. Instrumental Analysis Center, Taiyuan University of Technology, Taiyuan Shanxi 030024, China
  • Received:2021-03-28 Online:2021-08-25 Published:2021-12-09

Abstract: Hydrogen embrittlement sensitivity of the solid solution treated and cold rolled 304 austenitic stainless steels after sensitization treating at 650 ℃ for 2 h and 24 h respectively was studied. The results show that compared with that of the solid solution treated state, the hydrogen embrittlement sensitivity of the steel in cold-rolled state increases due to strain-induced martensite. Sensitization treatment increases the hydrogen embrittlement sensitivity of the solid solution treated steel. The longer the sensitization time is, the higher the hydrogen embrittlement sensitivity is. On the contrary, in the steel in cold-rolled state, the martensite is partially transformed into austenite during high temperature sensitization, which reduces the hydrogen embrittlement sensitivity of the tested steel to a certain extent. The longer the sensitization time is, the lower the hydrogen embrittlement sensitivity is.

Key words: 304 austenitic stainless steel, solid solution treatment, cold rolling, sensitization, hydrogen embrittlement sensitivity

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