AZ91HP镁合金真空激光熔凝的微观组织与性能  

Microstructure and Properties of AZ91HP Magnesium Alloy Treated by Vacuum Laser Melting

作　　者：高亚丽[1] 王存山[1] 刘红宾[1] 姚曼[2] 

机构地区：[1]大连理工大学三束材料改性国家重点实验室,116023 [2]大连理工大学材料系,116023

出　　处：《应用激光》2005年第3期148-150,共3页Applied Laser

摘　　要：在真空条件下对AZ91HP镁合金进行了激光熔凝处理。研究结果表明,镁合金激光熔凝层均是由α3/Mg和β-Mg17Al12相所构成,且随激光扫描速度的增加,β-Mg17Al12相的相对含量降低。随着激光扫描速度的增加,由于熔凝层组织细化,致使其硬度、耐磨性、减磨性和耐蚀性增加,但因熔凝层中β-Mg17Al12相的相对含量较高,使得激光熔凝层的耐蚀性较镁合金为低。AZ91HP magnesium alloys were treated by vacuum laser melting. The result shows that laser melting layers treated by different scaning speed mainly consist of α–Mg andβ-Mg17Al12 phases, and the relative content of β-Mg17Al12 phase decreases with the increase of scaning speed. Because of the refined structure of the melted layer, hardness, wear resistance, antifriction, erosion resistance of the laser melting layer increase with the increase of scaning speed. Compared with magnesium alloy, erosion resistance of the laser melting layer decreases due to high content of β-Mg17Al12 phase.

关 键 词：镁合金 组织与性能 微观 激光熔凝处理 扫描速度 真空条件 研究结果 含量降低 组织细化 相对含量 耐蚀性 耐磨性 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG146.2[金属学及工艺—金属材料]