在橡胶轮磨料磨损实验机上考察了40Cr钢基体上离子氮化与离子镀TiN复合涂层在苜蓿草粉软磨料下的摩擦学特性.采用划痕法测定了涂层的结合力,利用XRD分析了涂层的相结构,应用扫描电子显微镜观察分析了涂层磨损表面形貌和磨损机理.结果表明:离子氮化与离子镀TiN复合涂层的膜基结合力和硬度均高于TiN涂层；其对于苜蓿草粉软磨料的耐磨性也高于TiN涂层和渗氮层；离子氮化过渡层能显著提高TiN涂层的膜基结合力并改善薄膜的韧性；涂层能有效限制硬质颗粒对基体的压嵌和切削.涂层在苜蓿草粉软磨料下的磨损机制既包括硬质颗粒磨料条件下的切削磨损,也包括软磨料条件下的多次塑性变形和周期疲劳磨损.涂层硬度和韧性的共增可以提高其对软磨料的耐磨性.
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