Effect of Mn addition on microstructure and mechanical properties of GX40CrNiSi25-12 austenitic heat resistant steel

Abstract

Heat resistant steel is widely used in high-temperature working environments in industrial fields such as electric power, petroleum, chemical industry and automotive due to its advantages of excellent high-temperature performance, good oxidation resistance and stress corrosion resistance [1][2][3] . However, the rapid development of industry has put forward higher requirements for the performance of heat resistant steels. For example, the increasingly strict regulations on automobile emissions and the application of various new technologies in automobiles have led to a continuous increase in exhaust temperature, which requires that the materials of automobile exhaust end components can withstand