挤压态AZ61镁合金磨损性能研究  

Wear Behavior of As-extruded Magnesium Alloy AZ61

作　　者：胡志[1] 闫洪[1] 聂俏 周国华[1,3] 刘晓亮[1] 

机构地区：[1]南昌大学先进成形研究所 [2]江西江铃有色金属压铸厂 [3]宜春学院物理科学与工程技术学院

出　　处：《特种铸造及有色合金》2011年第2期149-152,203,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50765005);江西省高校科技创新团队资助项目(00008713)

摘　　要：主要研究了挤压态AZ61镁合金在不同载荷和滑动摩擦速度条件下的磨损性能。采用SEM对磨损面进行显微组织观察与分析,讨论了不同载荷下材料的主要磨损形式。结果表明,磨损质量损失随着滑动摩擦速度和载荷的增加而增加。挤压态AZ61镁合金的磨损机制主要分为轻微磨损和严重磨损。轻微磨损主要是擦伤磨损、氧化磨损与剥层磨损,在磨损面上形成的擦痕与裂纹,其磨损程度较轻,磨损面积小;当载荷增加到100N和120N时,塑性变形和熔化在磨损面形成的磨痕较深且磨损面积大,表现为严重磨损。Wear behavior of as-extruded magnesium alloy AZ61 was examined at loading of 10~120 N and sliding velocity of 0.5~1.5 m/s.Microstructure of worn surface was observed by SEM(scanning electron microscope),and wear mechanism of the materials at different loadings was described.The results show that wear weight loss is increased with increasing in sliding velocity and loading.Wear mechanism of the as-extruded AZ61 magnesium alloy is classified into mild wear and severe wear.Abrasive wear,oxidation and delamination wear are the dominant wear mechanisms in the mild wear,where wear degree and wear rate exhibits mild and small.With loading increasing to 100 N and 120 N,plastic deformation and surface melting are the dominant role in the severe wear,where wear degree and wear area are more serious and larger.

关 键 词：AZ61镁合金 磨损性能 轻微磨损 严重磨损 

分 类 号：TG292[金属学及工艺—铸造]