RE—Ca对ZG35CrMo铸钢塑韧性的影响

用光学、扫描电子显微镜、Ｘ－射线衍射和电子探针微区分析了ＺＧ３５ＣｒＭｏ铸钢的显微组织、非金属夹杂物和断口形貌。试验结果表明，ＺＧ３５ＣｒＭｏ铸钢经适量ＲＥ－Ｃａ处理，可消除魏氏组织，细化晶粒，钢中夹杂物由多角状变为球状，其数量减少，分布均匀，明显提高了铸钢的塑韧性和强度。

Effect of RE-Ca on Plasticity-Toughness of Cast Steel ZG35CrMo

The mierostructure , non-metallic inclusion and fracture morphology of cast steel ZG35CrMo has been studied using optical and scanning electron microscope (SEM), X-ray diffraction and electron micdroprobe analysis technique. The test results showed that with adding moderate RE-Ca in cast steel ZG35CrMo, the Widmannstatten structure in steel was elithenated, the grains of cast steel were refined and the non-metallic inclusions maied from polygon to spheroid, of which theamount decreased and the distribution was homogeneous, as a result the plasticity-toughness of the cast steel increased obviously.