分别选择NiCrSiB及其加入不同量Mo元素的NiCrMoSiB(1)、NiCrMoSiB(2)自熔合金粉末和CuNiSiB自熔合金粉末,采用氧乙炔焰粉末喷焊工艺制备覆层,用超声波振动气蚀仪对覆层进行耐气蚀性能研究,用扫描电子显微镜对覆层表面气蚀破坏形貌进行观察.结果表明:含Mo的镍基覆层有较好的耐气蚀性,且随着Mo元素加入量的增加,耐气蚀性增大; CuNiSiB比NiCrSiB覆层耐气蚀能力强.还探讨了覆层气蚀破坏机理.
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