利用短脉冲强激光对40Cr调质钢表面进行了激光喷丸强化处理.激光冲击强化参数为激光波长1.054 μm,脉冲时间为23 ns,光斑直径为φ8 mm,功率为20～24 J.选用水为约束层,墨漆为吸收激光能量的涂层.通过测试研究了喷丸强化后材料的微观组织、显微硬度和摩擦磨损性能.结果表明,激光喷丸能够细化表层的微观组织;材料强化后表面显微硬度值能提高30%,并沿深度方向逐渐减小;经过滑动磨损后,未强化处理的试样的累计磨损失重是冲击处理试样1.4倍,强化层磨损机理以磨粒磨损和粘结磨损为主.
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