Fe-Cr-V-Ni-Si-C系多元合金的基体相稳定性及实验研究

Stability of matrix phase for Fe-Cr-V-Ni-Si-C system multi-element alloy and its experiment study

将Finnis-Sinclair多体势扩展到多元合金,建立适合于Fe-Cr-V-Ni-Si-C系的多元合金的原子间相互作用势函数;利用其多元合金的原子间相互作用势函数,研究Fe-Cr-V-Ni-Si-C系多元合金奥氏体和马氏体基体的稳定性.研究表明,计算结果与实验结果具有对应关系;加入适量Ni,可确保高钒高铬铸铁在铸态下相变成马氏体,残余奥氏体经过高温回火完全分解进而获得高的硬度.

The application of finnis-sinclair many-body potential is extended to multi-element alloys,and the interatomic potentials functions were constructed for Fe-Cr-V-Ni-Si-C system multi-element alloy.The stability and transformation of the austenite and matertensite matrix for Fe-Cr-V-Ni-SiC system alloys were examined by the acquired interatomic potentials functions.The tested results were analyzed and compared with the calculation results.Adding appropriate nickel content insures that the as-cast matrix of the high vanadium and high chromium cast iron transforms into martensite and retained austenite.The retained austenite decomposed completely at high tempering temperature,and the high hardness can be obtained.