摘要
采用等离子喷涂和激光重熔复合工艺在AZ91D镁合金表面制备Al-Si-Cu合金涂层,利用扫描电子显微镜(SEM)、显微硬度计、摩擦磨损试验机等研究了涂层的微观组织、显微硬度与摩擦磨损性能。结果表明,激光重熔后涂层组织致密均匀,涂层与基体呈良好的冶金结合,涂层显微硬度约为基体的2.2倍,由于晶粒细化和硬质相的存在耐磨性较基体明显提高,重熔层的磨损机制主要为磨粒磨损。
Al-Si-Cu coating was prepared on AZ 91D magnesium alloy surface by plasma spraying and laser remelting .Microstructure, microhardness and tribological properties of the coating were studied by scanning electron microscope ( SEM) , micro Vickers hardness tester and pin-on-disk tester.The results show that after laser-remelting, the microstructure of the coating is dense and uniform , and the interface between the coating and substrate is good metallurgical bonding .The average microhardness of the coating is about 2.2 times as that of the substrate, the wear resistance of the coating increases obviously than that of the substrate due to the existence of grain refinement and hard phase , the main wear mechanism of the coating is abrasive wear .
出处
《金属热处理》
CAS
CSCD
北大核心
2014年第9期96-99,共4页
Heat Treatment of Metals
基金
江苏省高校自然科学研究项目(11KJD460004)
江苏省普通高校研究生科研创新计划(KYLX_1078)
江苏科技大学研究生科技创新计划(YCX13S-09)
