铸锻复合成形及时效对AZ91D合金组织和性能的影响  

Effect of Cast-Forge Integrated Forming and Aging Treatment on Microstructure and Mechanical Properties of AZ91D Magnesium Alloy

作　　者：齐冬亮 曹韩学[1,2] 杨怀德[1] 朱思龙 郝婷婷[1] 

机构地区：[1]重庆大学材料科学与工程学院 [2]国家镁合金材料工程技术研究中心

出　　处：《特种铸造及有色合金》2014年第4期394-397,共4页Special Casting & Nonferrous Alloys

基　　金：9C省部产学研结合重大专项资助项目(2012A090300016)

摘　　要：采用挤压铸造和铸锻复合成形方法生产汽车转向控制臂,研究了铸锻复合成形及后续时效对AZ91D镁合金组织和性能的影响。结果表明,铸锻复合成形后,合金发生再结晶,制件组织细化,控制臂受力部位的抗拉强度、屈服强度、硬度和伸长率较挤压铸造都有所提高。经时效处理后,抗拉强度、屈服强度和硬度进一步提高,但伸长率有所下降。The auto-steering control-arm was produced by squeeze casting and by casting-forging integrat- ed forming, respectively, and effects of casting-forging forming and aging treatment on microstructure and properties of AZ91D magnesium alloy were analyzed. The results show that the microstructure of casting-forging auto steering control-arm is refined as a result of recystallization, and tensile strength, yield strength, hardness and elongation are superior to those in squeezing casting. After aging treat- ment, tensile strength, yield strength and hardness of the control arm are further increased, while elon- gation is slightly decreased.

关 键 词：AZ91D 挤压铸造 铸锻复合成形 时效处理 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG249.2[金属学及工艺—金属材料]