Simulation Calculation of the Effect of Al on Precipitate Phase of Ferritic Heat Resistant Steel
Author of the article:ZHAO Manman;QIN Sen;FENG Jie;DAI Yongjuan;GUO Dong
Author's Workplace：School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050000,China
Key Words：Thermo-Calc software ferritic heat-resistant steel equilibrium phase diagram precipitated phase
Abstract：
Optimized on the composition of T92 heat resistant steel,the equilibrium precipitation phase of test steel was calculated by Thermo-Calc thermodynamics software,and the influence rule of Al on the precipitates of the heat-resistant steel was emphatically studied.The results show that when Al content is less than 4%,Al has little effect on the precipitation of Laves phase and M23C6 phase,but increases the initial precipitation temperature of Laves phase and M23 C6 phase;Al has a great influence on Z phase,when Al content is less than 4%,both the precipitation amount and the initial precipitation temperature of Z phase decrease,and when Al content is more than 4%,almost no Z phase is precipitated;The influence of Al on the formation of aσphase is also obvious.The influence of Al on the number ofσphases and the initial precipitation temperature is complex,but when the content of Al is 4%,there is almost noσphase precipitation.
