摘要
针对镁合金表面耐磨性差,采用预置粉末法对AZ31B表面进行激光合金化Al-SiC粉末实验。使用光学显微镜和扫描电子显微镜(SEM)、能谱分析仪(EDS)、摩擦磨损试验机、显微硬度计对合金化涂层的微结构、相组成及性能进行了分析研究。结果表明,强化层与基体呈冶金结合、组织均匀致密;合金化层主要由Mg17Al12、SiC、Mg2Si、Al4C5、Al2O3等相组成。涂层的显微硬度、耐磨损性能都明显高于基体。
To improve wear resistance of the surface of magnesium alloy, Laser alloying of A1 - SiC powders coating on AZ31 B magnesium alloy is achieved by the method of replaced- powder. The composition microstructure of the coating are analyzed by light microscope,scanning electron microscope （SEM） and energy disperse spectroscopy. Surface properties of the coating are evaluated using a micro - hardness tester and a abrasion tester condition at room temperature. The results show that the AI - SiC alloying layers are well bonded with the substrate ;The alloying coating is composed of Mg17 AI12,SIC, Mg2 Si,A14 C5 and A12 03. Microhardness, wear resistance are obviously higher than that of matrix.
出处
《现代机械》
2014年第2期77-80,共4页
Modern Machinery
关键词
激光合金化
显微组织
显微硬度
耐磨损性能
AZ31 B
laser alloying
microstructures
micro hardness
wear properties
