微量元素Zr对ZA35合金组织及力学性能的影响  

Effects of Trace Zirconium on Microstructure and Mechanical Properties of As-Cast ZA35 Alloy

作　　者：白彦华[1] 宋建[1] 刘敬福[2] 崔佳[2] 李学智[1] 

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110178 [2]辽宁工程技术大学材料科学与工程学院,辽宁阜新123000

出　　处：《铸造》2011年第12期1241-1244,共4页Foundry

基　　金：辽宁省科技攻关项目(2006304009)

摘　　要：研究了添加合金元素Zr对ZA35合金组织及力学性能的影响。结果表明:元素Zr在组织中主要以Al3Zr相形式存在,元素Zr能够细化晶粒,使粗大的树枝晶组织转变为团聚状组织,一次枝晶臂由细长变得短粗且圆整;Zr含量为0.3%时,合金的抗拉强度为354 MPa,硬度为HB 136,与未添加合金元素的ZA35合金相比,抗拉强度提高了29 MPa。Experiment was carried out to investigate the effects of trace element Zr on the microstructure and mechanical properties of as-cast ZA35 alloy. The results show that Zr mainly exists in the structure in the form of Al3Zr phase. The element Zr can refine the grain and change the coarse dendrite into a glomerate structure; the primary elongated dendrite arms become short, thick and round. With 0.3% addition of Zr, the tensile strength of the alloy was up to 354 MPa and the hardness of the alloy was up to HB 136. Compared with the alloy without Zr, the tensile strength is increased by 29 MPa.

关 键 词：ZA35合金 Zr元素 组织 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]