利用Thermo-Calc软件研究了锰合金化对高铬铸铁相平衡及微观结构的影响。结果表明，锰的添加导致奥氏体和碳化物间合金元素的再分配，降低非平衡相变温度。在3C-15Cr-4Mn-0.75Si系统中，静态平衡条件下约87%为莱氏体，非平衡条件下23%至32%为M7C3型碳化物。锰通过替代铬稳定奥氏体并提高硬度。
摘要：
The manganese alloying rule and its effect on the microstructure in high chromium cast iron have been studied based on thermodynamic equilibrium phase calculations using Thermo-Calc software. The results show that the addition of certain manganese in high chromium cast iron leads to a re-partitioning of alloy elements between austenite and carbide and a dropping in equilibrium phase transformation temperature although it's inappreciable for the influence of manganese on mass fractions of every phase in this cast iron. There is about 87 percent ledeburite under thermodynamic equilibrium condition and 23 to 32 percent M7C3 type carbide under thermodynamic non-equilibrium condition in the microstructure of 3C-15Cr-4Mn-0.75Si system high chromium cast iron. Furthermore, the improvement of austenite stability and hardenability of manganese alloyed high chromium cast iron may been expected because there is a substitution between manganese and chromium that has been suggested by thermodynamic calculations. The predictions obtained with Thermo-Calc software are primarily in agreement with the available experiments.
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