为对比研究表面处理对17-4PH不锈钢抗固体粒子冲蚀性能的影响,在17-4PH不锈钢表面进行了多弧离子镀陶瓷/金属多层膜制备、激光表面合金化(LSA)处理和超音速火焰喷涂(HVOF)硬质合金层处理,利用划痕仪、自组装的不锈钢抗固体粒子冲蚀(SPE)装置、多冲疲劳试验机对上述三种表面处理试样的小攻角和大攻角SPE失效行为和机理进行了研究.结果表明,微切削是17-4PH不锈钢及其表面改性试样小攻角下固体粒子冲蚀破坏的主要失效机制,多冲型疲劳破坏是17-4PH不锈钢及其表面改性试样大攻角下固体粒子冲蚀的主要失效机制.HVOFWC-17Co涂层可显著提高17-4PH不锈钢30°小攻角和90°大攻角下SPE抗力.激光表面合金化层能够改善17-4PH不锈钢抗30°小攻角和90°大攻角下SPE性能,但SPE性能改善效果弱于HVOF喷涂涂层.TiAlN/Ti多层膜不能显著提高17-4PH不锈钢抗30°小攻角和90°大攻角的SPE性能.
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