热处理和稀土Ce对AZ91D合金性能的影响  

Effects of Heat Treatment and Rare Earth Ce on Properties of AZ91D Magnesium Alloy

作　　者：胡勇[1] 饶丽[1] 黎秋萍[1] 

机构地区：[1]华东交通大学机电工程学院

出　　处：《特种铸造及有色合金》2014年第12期1244-1247,共4页Special Casting & Nonferrous Alloys

基　　金：江西省自然科学基金资助项目(20142BAB216015);江西省钨铜新材料重点实验室开放基金资助项目(2013-KLP-07)

摘　　要：研究了热处理和稀土Ce共同作用对AZ91D镁合金组织和性能的影响。结果表明,AZ91D镁合金中加入稀土Ce后,生成了杆状化合物Al4Ce,且网状分布的β-Mg17Al12相变成弥散化分布。随稀土Ce含量的增加,AZ91D镁合金的力学性能和耐蚀性能提高。经T4和T6热处理,杆状化合物Al4Ce的形貌保持不变。T6处理后,加入了稀土Ce合金的力学性能和耐蚀性能比铸态AZ91D镁合金的力学性能和耐蚀性能显著提高。Effects of heat treatment and rare earth Ce on the microstructures and properties of AZ91D magnesium alloy were investigated. The results indicate that the rod-like AI4Ce compounds are genera- ted in AZ91D magnesium alloy with Ce addition, and net-like β-Mg17 Allz is dispersedly distributed into the alloy. The mechanical properties and corrosion resistance of the magnesium alloy are improved with increasing in rare earth Ce. The morphology change of the rod-like compounds A14 Ce is absent after T4 or T6 heat treatment. Compared with those of as cast AZ91D magnesium alloy, the mechanical proper- ties and corrosion resistance of AZ91D containing Ce alloy after T6 heat treatment are improved signifi- cantly.

关 键 词：稀土Ce 镁合金 显微组织 力学性能 腐蚀性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG146.27[金属学及工艺—金属材料]