W_(18)Cr_4V钢真空加热油淬后,表面出现白亮层和熔化层等异常现象。本文利用金相显微镜,显微硬度计、扫描电子显微镜和电子探针等手段对白亮层和熔化层进行了分析研究。试验表明,白亮层、熔化层均是真空油淬增碳的结果。本文对白亮层、溶化层形成原因进行了比较深入的分析探讨提出了产生白亮层必须同时具备的三个条件。 W_ (18) Cr_4V steel vacuum heating oil quenching, the surface appeared white bright layer and melting layer and other anomalies. In this paper, metallographic microscope, microhardness tester, scanning electron microscopy and electron probe were used to analyze the white-bright layer and the melted layer. Experiments show that the white and melted layers are all the result of vacuum oil quenching carbon. In this paper, the reasons for the formation of white bright layer and melting layer are analyzed and discussed in detail. Three conditions that must be met simultaneously are proposed.