挤压铸造高强韧Al-5.0Cu-0.4Mn合金的组织与性能  

Microstructure and Property of High Strength-ductility Al-5.0Cu-0.4Mn Alloys Prepared by Squeeze Casting

作　　者：程佩[1] 汪先送[1] 林波[1] 张卫文[1] 李元元[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《铸造技术》2012年第10期1135-1138,共4页Foundry Technology

基　　金：国家科技支撑计划项目(2011BAE21B00);GD-NSFC联合基金项目(U1034001);省部产学研重点专项(2009A090100026);广东省科技攻关项目(2008A010300003)

摘　　要：采用标准流动性实验、阿基米德密度实验、硬度测试、金相显微镜、扫描电镜和能谱分析等方法,研究了不同挤压力下Al-5.0Cu-0.4Mn合金的微观组织和性能。结果表明,该合金的流动性略优于ZL205A;50 MPa挤压比压和T5态下,该合金典型性能为密度2.80 g/cm3,抗拉强度441 MPa,伸长率21%,硬度45 HRB;随着挤压比压的增加,合金的密度、硬度、抗拉强度和伸长率均增加,但增幅逐渐减小。The microstructure and properties of Al-5.0Cu-0.4Mn alloys prepared by squeeze casting under different specific pressure were studied by means of standard fluidity testing,Archimedes density experiment,hardness testing,metallographic microscope,SEM and energy spectrum analysis.The results show that the fluidity ability of the alloys is better than ZL205A.The typical physical and mechanical properties under 50 MPa and T5 are follows： density 2.80 g/cm3,tensile strength 441 MPa,elongation 21%,hardness 45 HRB.The physical and mechanical properties of the alloys as-cast increase with the increase of specific pressure,while increasing amplitude decreases.

关 键 词：挤压铸造 AL-CU-MN合金 力学性能 显微组织 

分 类 号：TG249.2[金属学及工艺—铸造]