La2(CO3)3对ZM5镁合金组织与力学性能的影响  

Influences of La_2(CO_3)_3 on the Microstructure and Mechanical Properties of ZM5 Magnesium Alloy

作　　者：刘闯[1] 李玉胜[1] 马志毅[1] 冯志军[1] 李宇飞[1] 郝启堂[2] 刘文辉 

机构地区：[1]沈阳铸造研究所,辽宁沈阳110022 [2]西北工业大学,陕西西安710071 [3]一汽铸造有限公司,吉林长春130011

出　　处：《铸造》2008年第10期1048-1051,共4页Foundry

基　　金：国家科技支撑先进近净成形与模具制造技术(2006BAF04B01)

摘　　要：利用光学金相显微镜(OM)、X射线衍射仪(XRD)和扫描电镜(SEM)研究了La2(CO3)3对ZM5镁合金铸态显微组织和力学性能的影响。结果表明,少量的La2(CO3)3(0.4%～1.0%)对α-Mg晶粒有明显地细化作用,La2(CO3)3的最佳加入量为0.7%。La2(CO3)3的加入导致β-Mg17Al12相弥散细小,显微组织的改善导致合金的力学性能明显提高。The investigation has been carried out on the influences of La2（CO3）3 on the as-cast microstructure and mechanical properties of ZM5 magnesium alloy by using of optical microscope （OM）, X-ray diffraction analyzer （XRD） and scanning electron microscope （SEM）. The results show that 0.4%-1.0% La2（ CO3）3 addition in the ZM5 magnesium alloy can obviously refine the grain size of α-Mg phase, where the best refined effects can be observed with 0.7% La2（ CO3）3 addition. In addition, La2 （ CO3）3 addition can result in the dispersive distribution of fine β-Mg17Al12 phase, which can greatly improve the mechanical properties of the alloy.

关 键 词：ZM5镁合金 晶粒细化 显微组织 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]