1. Institute of Structural Steels, Central Iron and Steel Research Institute, Beijing 100081, China; 2. Beibu Gulf New Materials Co., Ltd., Beihai 536017, Guangxi, China
Abstract:Based on the advantages and disadvantages of traditional AISI300 austenitic stainless steel and high nitrogen austenitic stainless steel,a new type of nickel saving austenitic stainless steel was developed. In order to study its optimum composition and industrial trial production process,the composition was designed by Thermo-Calc thermodynamic calculation software,the hot rolling trial production test steel and the microscopic test method were used to analyze the test steel. The results show that the optimum composition range is N 0.2%-0.3%,C<0.1%,Cr 18%-20%,Mn 8%-10%,Ni 1%-2%. After isothermal at 1 240 ℃,a large amount of ferrite will be precipitated,so that it can not be eliminated at 1 150 ℃ and cracks will appear. The holding temperature before rolling is reduced to 1 150 ℃ and there is no crack in hot rolling.
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