冲蚀速度及沙粒粒径对铝青铜冲蚀磨损的影响  

Effect offlow velocity and particle size on the erosion of QAl9-4 aluminum bronze

作　　者：黄伟九[1,2] 刘成龙[1,2] 李志均[1] 王军军[1,2] 廖志康[1] 

机构地区：[1]重庆理工大学重庆市模具技术重点实验室,重庆40054 [2]重庆理工大学材料科学与工程学院,重庆400054

出　　处：《功能材料》2016年第10期10193-10197,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51171216)

摘　　要：利用旋转式冲蚀试验机对QAl9-4铝青铜在含SiC沙粒的3.5%NaCl中的冲蚀磨损行为进行了研究。结果表明,在介质流速小于28.3m/s时,失重量随介质流速的增加而增大;失重随沙粒粒径变化有明显的转折点,在粒径为0.3mm时材料流失最为显著。沙粒粒径变化引起QAl9-4铝青铜冲蚀磨损行为的变化,小粒径时以犁削磨损为主,大粒径时锻打挤压作用增强的同时犁削磨损作用减弱。The erosion of QAl9-4 aluminum bronze has been investigated in 3.5% NaCl including SiC particles by using a rotating disk system.The results show that the mass loss increases with increasing the flow velocity when the velocity is lower than 28.3 m/s,and the mass loss vs particle size exhibits an transition point beyond which the mass loss decreases obviously,which is 0.3 mm.The variations of particle size can lead to the change of the erosion behavior of QAl9-4 aluminum bronze samples.The failure of samples is mainly attributed to the ploughing wear under condition of little particles,however,the forging and extrusion effect improves and the ploughing wear decreases under condition of big particles.

关 键 词：冲蚀磨损 铝青铜 沙粒粒径 冲击速度 

分 类 号：TG174.2[金属学及工艺—金属表面处理]