利用自制的冲蚀磨损试验装置,对水力机械过流部件堆焊修复中常用的CrMoV和CrNi合金堆焊涂层进行了液固两相流冲蚀磨损性能研究.结果表明:在低角度冲蚀磨损条件下,CrMoV合金堆焊涂层表现出优于CrNi合金堆焊涂层的耐泥沙冲蚀磨损性能,堆焊层硬度是耐泥沙冲蚀磨损的主要因素;在高角度冲蚀磨损条件下,CrNi合金堆焊涂层表现出比CrMoV合金堆焊涂层更好的耐泥沙冲蚀磨损性能,堆焊层组织的断裂韧性是主要因素;冲蚀磨损量随冲蚀速率增加而显著增加,冲蚀磨损率取决于冲蚀磨粒的能量.
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