同时，共渗在空心滚子内表面造成的压应力对改善弯曲疲劳性能有利。
Meantime, the compressive stress in inner surface of hollow roller by nitrocarburizing is available for improvement of bend fatigue property.
可在较宽的温度范围内对该钢进行脉冲直流等离子渗氮，获得表面硬度高于基底5 ~ 6倍的渗氮层。
The microhardness of nitriding layers obtained in a wide range of treatment temperature is 5 ~ 6 times higher than that of the substrate.
对渗铝层的显微组织、内氧化层的硬度分布及显微组织进行了初步分析。
The microstructure of aluminized layer, hardness distribution and microstructure of internal oxidation layer were investigated.
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