Abstract In this paper, the water droplet erosion (WDE) performance of a typical martensitic blade material 17-4 PH (0Cr17Ni4Cu4Nb), surface strengthened laser cladding stellite and brazed stellite alloy is studied based on high-speed water jet test system. The WDE resistances from high to low are the brazed stellite alloy, laser cladding stellite alloy and 17-4 PH. For the same material, the greater the initial roughness of the target surface, the more severe is the WDE damage. Improving the surface finish of the target is conducive to the diversion and expansion of the liquid flow, prolonging the incubation period, and thus enhancing the WDE resistance.

中文翻译：

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表面强化工艺和粗糙度对涡轮机械水滴侵蚀行为影响的实验研究

摘要 本文基于高速水射流试验系统研究了典型马氏体叶片材料17-4 PH（0Cr17Ni4Cu4Nb）、表面强化激光熔覆司太立和钎焊司太立合金的水滴侵蚀（WDE）性能。WDE 电阻从高到低依次为钎焊司太立合金、激光熔覆司太立合金和 17-4 PH。对于相同的材料，目标表面的初始粗糙度越大，WDE 损伤越严重。提高靶材表面光洁度，有利于液流的分流和扩张，延长潜伏期，从而增强抗WDE能力。