用透射电镜和X射线衍射仪,分析了Cr12MoV钢激光熔凝层的显微组织为奥氏体的树枝晶,其晶间还有共晶碳化物和少量二次碳化物,没有观察到马氏体相变,因此激光熔凝处理后,钢的表面硬度降低。
The microstructure of laser melted layer on Cr12MoV steel was re-vealed as austenitic dendrites under observation by TEM and X-ray diffractometer.The interdendritic eutectic carbides together with a little secondary carbides, but nomartensitic transformation were presented. Thus, the hardness of the steel is reducedafter laser melting treatment.
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