Heat Treatment of Metals ›› 2022, Vol. 47 ›› Issue (6): 107-110.DOI: 10.13251/j.issn.0254-6051.2022.06.020

• PROCESS RESEARCH • Previous Articles     Next Articles

Effect of solution treatment on high temperature mechanical properties of austenitic stainless steel 07Cr18Ni11Nb

Shu Wei1, Wang Liying2   

  1. 1. State Key Laboratory of Advanced Stainless Steels, Taiyuan Iron and Steel Co., Ltd., Taiyuan Shanxi 030003, China;
    2. Technology Center, Shanxi Taigang Stainless Steel Co., Ltd., Taiyuan Shanxi 030003, China
  • Received:2022-01-27 Revised:2022-04-15 Online:2022-06-25 Published:2022-07-05

Abstract: Effect of solution treatment on high temperature mechanical properties of austenitic stainless steel 07Cr18Ni11Nb was investigated. The results show that the high temperature yield strength at 500 ℃ and 600 ℃ decreases with the increase of solution treatment temperature, but the high temperature tensile strength at 500 ℃ and 600 ℃ has no obvious change. When the solution treatment temperature is ≤1100 ℃, the austenite grain size remains basically unchanged. When the solution treatment temperature is more than 1100 ℃, the austenite grain size grows gradually, and when the solution treatment temperature reaches 1200 ℃, the austenite grain size increases to over 100 μm. The austenite grain boundary is still an important factor to the strengthening effect when the tensile test is under 600 ℃. The smaller the grain size, the higher the yield strength at high temperature.

Key words: austenite stainless steel, solution treatment, high temperature mechanical properties

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