稀土Y+AZ91D镁合金的微观组织及耐蚀性研究  

Research on Microstructure and Corrosion Resistance of Y+AZ91D Magnesium Alloys

作　　者：刘敏丽[1] 刘丽[2] 

机构地区：[1]内蒙古机电职业技术学院冶金与材料工程系,内蒙古呼和浩特010051 [2]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051

出　　处：《热加工工艺》2010年第4期61-63,66,共4页Hot Working Technology

摘　　要：通过盐雾腐蚀试验,研究了稀土Y对AZ91D镁合金耐腐蚀性能的影响。用光学显微镜(OM)观察组织结构,应用XRD对其进行物相分析,采用静态失重法计算其腐蚀速率,比较含Y和不含Y的AZ91D镁合金的组织和耐腐蚀性能。结果表明,Y+AZ91D镁合金在NaCl溶液中具有优异的耐蚀性,并且随Y含量的增加,Mg17Al12相增多,针状组织Al4MgY也增多,细化了合金的微观组织,耐腐蚀性能也进一步得到提高。The microstructure and phase composition of AZ91D magnesium alloys with the different additions of Y were studied by optical microscope（OM） and X-ray diffraction（XRD）,and the corrosion rate was counted by static-state mass loss method.The microstructure and corrosion properties were compared between the alloys with and without the addition of Y.The results indicate that AZ91D magnesium alloys system has high anti-corrosion properties in NaCl solution.The number of Mg17Al12,Al4MgY increases with the increase of Y content in the alloys.The corrosion rate decreases with the increase of Y content in the alloys.

关 键 词：稀土钇 AZ91D镁合金 耐腐蚀 

分 类 号：TG146[一般工业技术—材料科学与工程]