摘要
采用AZ31B镁合金真空扩散连接工艺,在AZ31B表面形成合金化扩散溶解结构。借助OM、SEM、EDS及XRD等方法分析不同工艺条件下结合界面扩散溶解层的微观组织及组成成分,利用PS-168a型电化学腐蚀测试系统对表面合金化扩散溶解层进行了耐蚀性测试。结果表明:恒温条件下,随保温时间的延长,在AZ31B表面形成宽度不等、与基材呈"锯齿"状咬合的扩散溶解层;扩散溶解层由过渡层和共晶区组成,自腐蚀电流比AZ31B镁合金基体提高约77%。
Vacuum diffusion bonding was used in the process of surface-alloying treatment on the surface of magnesium alloy. The microstructure, phase composition and corrosion-resistance of diffusion-solution layer were analyzed by means of OM, SEM, EDS, XRD, PS-168a and so on. It is found that the diffusion-solution layer is formed on the surface of AZ31B magnesium alloy. The diffusion-solution layer with different width is made up of columnar and block transition layer and rosette eutectic layer. And its self-corrosion current is improved about 77% than that of AZ31B.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2012年第5期38-42,共5页
Ordnance Material Science and Engineering
