用光学显微镜、扫描电镜、电子探针和X射线衍射，对抗汽蚀较优的硼不锈钢堆焊层和抗磨蚀较优的碳化钨陶瓷堆焊层的原样、汽蚀后样和磨蚀后样进行了微观分析研究。结果表明，硼不锈钢堆焊层是较好的抗汽蚀材料，但抗磨蚀效果不理想；碳化钨对磨蚀损坏有良好的屏障作用；磨蚀坑是气泡溃灭产生的脉冲式法向负压力和脉冲式泥沙冲击切向分力联合作用的结果。

A typical cavitation erosion resisting sample,the weld deposited coationg of boronic stainless steel, and a typical erosion and abrasion resisting sample,the weld deposited coating of WC ceramic are micro-analyzed and studied by means of light microscope, scanning electron microscope(SEM) ,electon probe and X-rays diffraction. The obtained results indicate that the weld deposited coating of boronic stainless steel has better resistance to cavitation eroion, while weld deposited coating of WC ceramics is a better barrier to erosion and abrasion. Forthermore,the material failure from erosion and abrasion is resulted from the combining actions of the minus pressure because of bubble crumbling and the tangential componental force caused by the dashing of silt granular.