Precipitated phases of superaustenitic stainless steel 654SMO
Zhi-gang Song1,En-xiang Pu1,2
1 Special Steel Institute, Central Iron & Steel Research Institute, Beijing 100081, China 2 School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Precipitated phases of superaustenitic stainless steel 654SMO
Zhi-gang Song1,En-xiang Pu1,2
1 Special Steel Institute, Central Iron & Steel Research Institute, Beijing 100081, China 2 School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
ժҪ The phase diagram of superaustenitic stainless steel 654SMO was calculated by thermodynamic software and the precipitated phases in the specimens aged at 800-1100��C for 1 h were studied by methods of physicochemical phase analysis, scanning electron microscopy and transmission electron microscopy. The results showed that the size of precipitated particles increased with increasing the temperature. The amount of second phases reached the maximum value at 900��C, but decreased above 900��C. There were about eight kinds of precipitated phases in 654SMO including �� phase, Cr2N, �� phase, �� phase, Laves phase, M23C6, M6C and M3C, in which the �� phase and Cr2N were the dominant precipitated phases.
Abstract��The phase diagram of superaustenitic stainless steel 654SMO was calculated by thermodynamic software and the precipitated phases in the specimens aged at 800-1100��C for 1 h were studied by methods of physicochemical phase analysis, scanning electron microscopy and transmission electron microscopy. The results showed that the size of precipitated particles increased with increasing the temperature. The amount of second phases reached the maximum value at 900��C, but decreased above 900��C. There were about eight kinds of precipitated phases in 654SMO including �� phase, Cr2N, �� phase, �� phase, Laves phase, M23C6, M6C and M3C, in which the �� phase and Cr2N were the dominant precipitated phases.
2017, Vol. 24 
