针对涂层硬度梯度过渡急剧、涂层与基体的结合力不足的问题,利用电子束对40Cr材料表面进行预处理,然后溅射Cr涂层,考察电子束预处理工艺对材料表面形貌、硬度分布、粗糙度、结合力及摩擦磨损等性能的影响规律.研究结果表明,电子束预处理后,基体硬度提高79％～109％,镀Cr后硬度进一步提高14％～25％,基体熔坑形貌不能完全被Cr层覆盖,涂层粗糙度高于基体未预处理涂层.40Cr经电子束预处理后溅射Cr层的结合力可提高约41.7％,主要原因是表面晶体结构及状态影响了涂层结合力.电子束预处理延长了涂层初磨阶段时间,增强了表面的摩擦磨损性能.
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