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采用物理气相沉积和表面涂覆相结合的方法对汽车齿轮进行了表面改性处理,研究了离子氮化、离子氮化+TiN、离子氮化+TiAlN涂覆处理对汽车齿轮表面粗糙度、物相、截面硬度和摩擦磨损性能的影响。结果表明,离子氮化+TiN和离子氮化+TiAlN处理后的表面粗糙度相比离子氮化层有明显改善。三种表面改性层的显微硬度都明显高于汽车齿轮基体,且离子氮化+TiN和离子氮化+TiAlN涂覆处理后的表层显微硬度远大于离子氮化层;离子氮化+TiN和离子氮化+TiAlN涂覆处理后的表层摩擦系数小于氮化处理表层,表面改性层耐磨效果从高至低依次为:离子氮化+TiAlN>离子氮化+TiN>离子氮化。
The surface modification of automobile gears was carried out by the combination of physical vapor deposition and surface coating. The effects of ion nitriding, ion nitriding + TiN, ion nitriding + TiAlN coating on the surface roughness of automobile gears, Phase, cross-section hardness and friction and wear properties. The results show that the surface roughness of ion nitriding + TiN and ion nitriding + TiAlN treatment is obviously improved compared with ion nitriding layer. The microhardness of the three surface modification layers was significantly higher than that of the automotive gear substrate, and the surface microhardness of ion nitriding + TiN and ion nitriding + TiAlN coating was much larger than that of ion nitriding layer. The ion nitriding + The friction coefficient of surface layer after TiN and ion nitriding + TiAlN coating is less than that of nitriding surface layer. The wear resistance of surface modification layer is in the following order: ion nitriding + TiAlN> ion nitriding + TiN> ion nitriding .