“…Next, the Z3CN20.09M cast austenitic stainless steel was obtained by heating at 1050 • C for 4 h and then quenching in water. The accelerated thermal aging method was carried out at 400 • C, and the actual aging speed was 4-5 times faster than in actual service (~288-327 • C) [20][21][22] in order to shorten the aging time. Z3CN20-09M cast stainless steel was aged, in total, 15,000 h, and at the holding times of 272, 544, 1000, 2000, 3000, 6000, 10,000 and 15,000 h, the samples were taken out and marked for subsequent microstructural analysis, and mechanical and corrosive property tests.…”