Heat Treatment of Metals ›› 2022, Vol. 47 ›› Issue (9): 87-91.DOI: 10.13251/j.issn.0254-6051.2022.09.015

• PROCESS RESEARCH • Previous Articles     Next Articles

Effect of solution treatment on austenite grain growth of low expansion GH2909 superalloy

Chen Qi1,2, Zhou Yang1,2, Fu Jianhui1,2   

  1. 1. Chengdu Advanced Metal Materials Industry Technology Research Institute Co. , Ltd. , Chengdu Sichuan 610303, China;
    2. State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan Liaoning 114009, China
  • Received:2022-04-27 Revised:2022-07-19 Published:2022-10-18

Abstract: In order to analyze the effect of solution treatment temperature and time on austenite grain growth in GH2909 superalloy and obtain the grain growth law, the GH2909 superalloy was solution treated at different temperatures (1000-1080 ℃) for different time (1-4 h). The average grain size of austenite in GH2909 alloy after different solution treatment processes was measured, and the austenite grain growth model during solution treatment was established. The results show that the austenite grain size of GH2909 alloy increases gradually with the increase of solution treatment temperature and time, and the Laves phase in the structure gradually redissolves. When the solution treatment temperature is lower than 1020 ℃, the GH2909 alloy has good ability to resist austenite grain coarsening, which can effectively guide the grain size control in the forging process of GH2909 alloy.

Key words: low expansion GH2909 superalloy, austenite, grain growth, solution treatment

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