Al-40Ce-5Sb-4.8Ti中间合金对ZA105镁合金的影响  

Effect of the Al-40Ce-5Sb-4.8Ti Master Alloy on the ZA105 Magnesium Alloy

作　　者：马涛[1] 雷鹏飞[1] 张西强 

机构地区：[1]太原重型机械集团有限公司特铸分公司,山西太原030024 [2]陕西东风车桥传动系统股份有限公司,陕西铜川727000

出　　处：《铸造设备与工艺》2013年第3期41-44,共4页Foundry Equipment & Technology

摘　　要：本文研究自制中间合金Al-40Ce-5Sb-4.8Ti对ZA105镁合金的显微组织和力学性能的影响。实验结果表明:加入中间合金后出现的呈颗粒状和细小针状均匀分布的Al4Ce相可以细化合金的基体和第二相(τ-Mg3(2Al,Zn)49相和φ-Al2Mg5Zn2相),同时还能提高合金的冲击韧度和常高温抗拉强度。但是加入过量的中间合金可以使第二相逐渐连接成网状,合金中还出现大量的针状相。这些网状相和针状相严重割裂基体,降低合金的综合力学性能。合金的硬度则随着中间合金加入量的增加而提高。This paper investigated the effect of Al-40Ce-5Sb-4.8Ti on the microstructure and the mechanical properties of Mg- 10Zn-5Al.The results showed that the A14Ce phase, appeared as particle or fine needle-like after adding the master alloy, can refine the matrix and the secondary phases（τ-Mg=（Al,Zn）49 and Ф-Al2Mg5Zn2）, and also can increase the impact-toughness and tensile strength at RT and high temperature.But with the further addition of master alloy in the magnesium alloy, the secondary phases join together and form net-like phases, and more needle-like phase form too.The net-like phase and needle-like deserve the matrix seriously, and reduce the comprehensive mechanical properties of the magnesium alloy.The hardness increased with the increase of master alloy addition.

关 键 词：ZA105镁合金 显微组织 力学性能 Al4Ce 

分 类 号：TG146.22[一般工业技术—材料科学与工程]