空蚀与冲蚀联合作用下锡黄铜表面失效形貌演变  

Evolution of Morphology of Tin Brass Failure Surface Under Combined Effect of Cavitation and Erosion

作　　者：廖志康[1] 刘成龙[1] 高丹丹[1] 李志均[1] 黄伟九[1] 

机构地区：[1]重庆理工大学材料科学与工程学院,重庆400054

出　　处：《重庆理工大学学报（自然科学）》2015年第6期41-45,53,共6页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51171216);重庆市科委自然科学基金重点资助项目(cstc2013jjB50003)

摘　　要：利用自制的旋转圆盘空蚀与冲蚀联合作用试验装置,对空蚀与冲蚀联合作用下HSn70-1锡黄铜的表面失效形貌演变进行了试验研究。结果表明:在自来水测试介质中,试样表现出显著的空蚀失效特征,介质流速为28 m/s时锡黄铜的空蚀破坏最为严重;在含沙量为3 kg/m3、流速为28 m/s的自来水中,随着试验时间的延长,锡黄铜的失效仅呈现出孕育期与上升期,且其表面失效主要缘于空蚀与沙粒诱发的冲蚀磨损,失效形貌演变特征表现为空蚀坑,以及冲蚀磨损产生的凸起唇片、凹坑和沟槽等缺陷的密度、面积及深度逐步增加。The evolution of the morphology of HSn70-1 tin brass failure surface was investigated under the combined effect of cavitation and erosion through homemade rotating disk test equipment. The results show that the samples suffer some significant cavitation damage in water,which is most serious with a flow rate of 28 m / s. In the test solution with 3 kg / m^3 sand,the failure of tin brass is divided into incubation and mass-increase stages at a flow rate of 28 m / s. The failure of sample surface is attributed to the cavitation and the erosion wear from the existence of sand particles,which is represented by the gradual increase of the density,area and depth of cavitation and erosion damages,such as pits,shear lips,grooves and so on.

关 键 词：铜合金 空蚀 失效形貌 冲蚀磨损 

分 类 号：TG115.5[金属学及工艺—物理冶金]