超声波对7050铝合金组织和时效特性的影响  

Effect of Ultrasonic Casting on Microstructure and Aging Behavior of 7050 Aluminum Alloy

作　　者：汪建武[1] 熊运星[1] 

机构地区：[1]浙江工商职业技术学院工学院

出　　处：《特种铸造及有色合金》2012年第12期1086-1090,共5页Special Casting & Nonferrous Alloys

基　　金：浙江省教育厅科研项目(Y201223686)

摘　　要：研究了超声波对铸造7050铝合金的微观组织和时效特性的影响。结果表明,与常规铸造比较,经超声处理的合金具有更加细小的微观组织,且更快达到时效峰值。超声处理7050合金在120℃、时效处理8h后,其强度即可达到峰值,抗拉强度、屈服强度和伸长率分别为602MPa、547MPa和12.7%。而常规铸造合金,时效处理12h后,其抗拉强度、屈服强度和伸长率达到峰值,分别为536MPa,462MPa和15.0%。The microstructures and aging characteristics of ultrasonic and traditional casting 7050 alumi- num alloys were investigated. The results show that, compared with the traditional casting alloy, the ultrasonic casting alloy is characterized with a finer microstructure, and aged time is decreased with easi- er aging-strengthened. For the hot-rolled plate, peak strength appears in the ultrasonic treated alloy with aging at 120 ℃ for 8 hours, where tensile strength, yield strength and elongation reach 602 MPa, 547 MPa,12.7%, respectively,while peak strength occurs in the traditional casting alloy with aged at 120 ℃ for 12 hours, where tensile strength, yield strength and elongation are 536 MPa, 462 MPa and 15.0 %, respectively.

关 键 词：7050铝合金 常规铸造 超声处理 微观组织 时效 

分 类 号：TG663[金属学及工艺—金属切削加工及机床]