Using the Phase Diagram module in the Thermo-Calc thermodynamic calculation software,the Scheil-Gulliver solidification model,and the professional TCFE11 In the iron-based database,the phase transformation paths and nonequilibrium solidification paths of CN7M cast austenitic stainless steel in the solidification and cooling process and the influence of major alloying elements on the vertical cross-sec-tion phase diagram of the equilibrium system were calculated and analyzed,respectively.Theoretical cal-culations combined with production practice show that the suitable solution temperature range of CN7M casting austenitic stainless steel is 1140～1160 ℃,and the holding time of the casting must he sufficient to completely eliminate the casting segregation and various secondary phases.
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