Zr对Al-Zn-Mg-Cu合金组织和性能的影响  

Effects of Zr on Microstructure and Properties of Al-Zn-Mg-Cu Alloy

作　　者：孙立明[1] 于化顺[1] 闵光辉[1] 张静[1] 

机构地区：[1]山东大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2007年第5期380-381,共2页Special Casting & Nonferrous Alloys

基　　金：山东省重点科技攻关项目(2006GG2203010)

摘　　要：研究了Zr对Al-Zn-Mg-Cu合金显微组织和力学性能的影响。结果表明,添加少量Zr可以细化合金铸态组织,并且在热挤压过程中抑制再结晶。在固溶时效过程中,可以促进第二相粒子的析出,从而使基体中析出均匀弥散第二相粒子。T6状态下,未加Zr的合金其抗拉强度仅为600MPa,伸长率为10.5%;而加Zr后其抗拉强度超过650MPa,伸长率达到12.3%。Effects of Zr on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy have been investigated. It was found that minor Zr addition can refine the as-cast microstructure of alloy and inhibit the recrystallization during hot extrusion. In addition, it can promote the segregation of uniform disperoids in solid solution treated alloy. The tensile strength and elongation of the T6 treated alloy without Zr and with Zr addition are 600 MPa, 10.5% and 650 MPa, 12.3% respectively.

关 键 词：力学性能 Al—Zn—Mg—Cu合金 ZR 

分 类 号：TG113[金属学及工艺—物理冶金]