9Cr18Mo马氏体不锈钢的平衡相热力学计算

Thermodynamic Calculation on Equilibrium Precipitated Phases in Martensitic Stainless Steel 9Cr18Mo

采用Thermo-Calc热力学计算软件,对9Cr18Mo马氏体不锈钢(%:0.95～1.10C、16.0～18.0Cr、0.4～0.7Mo)平衡析出相M_(23)C_6和铁素体以及非平衡凝固进行了模拟计算分析。结果表明,凝固时9Cr18Mo钢中C、Cr、Mo和Fe偏析都比较严重;C和Cr含量对M_(23)C_6析出量以及M_(23)C_6与基体中的Cr、Fe含量有一定的影响;而Mo含量的变化仅对M_(23)C_6析出量以及M_(23)C_6所含Cr、Mo元素有所影响。

Simulated calculation and analysis on equilibrium precipitated phases M23 C6 and ferrite as well as non-equilibrium solidification of martensitic stainless steel 9Cr18Mo （% ： 0. 95 - 1.10C, 16. 0 - 18. 0Cr, 0. 4 -0. 7Mo） have been carried out by using Thermo-Calc thermodynamic calculation software. Results show that during solidification the segregation of C, Cr, Mo and Fe in steel 9Cr18Mo is rather serious, the C and Cr content in steel have definite effect on the precipitated amount of M23 C6 and the elements such as Cr and Fe content in M23 C6 and in matrix, while the change of Mo content in steel only effects on the precipitated amount of M23 C6 and the Cr and Mo content in M23 C6.