Preparation method of AlFeNiMoNb modified 904L alloy applied to oxygen-containing high-temperature chlorine corrosion environment

The invention discloses a preparation method of an AlFeNiMoNb modified 904L alloy applied to an oxygen-containing high-temperature chlorine corrosion environment. According to the preparation method, high-purity (99.99%) Al, Fe, Ni, Mo and Nb metal powder and a high-purity (99.99%) commercialized 904L super austenite alloy are taken as initial raw materials, and the AlFeNiMoNb modified 904L alloy (AlFeNiMoNb:904L) is prepared by adopting a hot pressing process and a vacuum arc melting technology. Metallographic analysis shows that the obtained alloy has the structure morphology completely different from that of raw materials, the structure is more uniform, and a 904L single austenite structure is converted into a dendritic crystal structure. In the atmosphere with the HCl content of 2660 ppm, the O2 content of 12%, the CO2 content of 24% and the balance of nitrogen, high-temperature chlorine corrosion experiments at the temperature of 600 DEG C, 700 DEG C and 800 DEG C for 55 hours are carried out, result ana