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利用扫描电镜，结合计算机有限元计算研究了残余奥氏体对30CrMn2Si铸钢耐磨性影响。结果表明：在两体磨损条件下．残奥量为26％时耐磨性能最好；在三体冲击磨损条件下，冲击功为1．oJ，残奥在2．6％时耐磨性能最好；冲击功为4.OJ，残奥为2．25%时耐磨性能最好。二体磨损以犁沟和切削机制为主，三体磨损时磨损以凿削、疲劳机制为主。
The effect of residual austenite on the wear resistance of 30CrMn2Si cast steel was studied by SEM and computer simulation. The results show that: in the two body wear conditions. Paralympic amount of 26% when the best wear resistance; In the three body impact wear conditions, the impact power of 1. oJ, Paralympic wear the best performance at 2.6%; Impact work is 4.OJ, Paralympic 2.25% wear resistance best. Two body wear to furrow and cutting mechanism, three body wear and tear to chisel, fatigue-based.