（1. Institute for Special Steels， Central Iron and Steel Research Institute， Beijing 100081， China 2. The Chinese Society for Metals， Beijing 100711， China）
Abstract：The kinetics of austenite grain growth inheat-resistant alloy C-HRA-3 was investigated through microstructure observation and theoretic model analysis under different solution-annealed temperatures and holding time. The solution temperature range of 1 125-1 200 ℃ was chosen, and holding time varied from 0-120 min. The results suggested that austenite grains growed gradually with the increase of solution temperature and holding time. The growth of austenite grain followed the Beck’s equation. The mean activation energy value was 459.07 kJ/mol in the temperature range of 1 150-1 200 ℃. The kinetics equation of austenite grain growth for C-HRA-3 alloy in isothermal heating process was obtained using regression analysis. The predicted grain sizes by the mathematical model are in good agreement with the measured ones.
收稿日期: 2016-11-12
出版日期: 2017-07-10
引用本文:
陈正宗，刘正东，包汉生，干 勇. C-HRA-3耐热合金奥氏体晶粒长大动力学[J]. 钢铁, 2017, 52(7): 64-67.
CHEN Zheng-zong，LIU Zheng-dong，BAO Han-sheng，GAN Yong. Kinetics of austenite grain growth in heat-resistant alloy C-HRA-3. Iron and Steel, 2017, 52(7): 64-67.
2017, Vol. 52 
