混合稀土对高锌镁合金组织和力学性能的影响  

Effect Of Mix Race Earth On Microstructure and Mechanical Properties Of High Zinc Magnesium Alloy

作　　者：田爱环[1] 张金山[1] 许春香[1] 韩富银[1] 王红霞[1] 梁伟[1] 

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《铸造设备研究》2007年第3期16-18,共3页Research Studies On Foundry Equipment

基　　金：国家自然科基金(50571073);山西省自然科学基金项目(20051052);太原市大学生专项基金(0701073)

摘　　要：在常规铸造条件下,向高锌镁合金熔体中加入适量混合稀土获得高锌镁合金。借助光学显微镜、X射线衍射仪、拉伸试验以及冲击实验等研究了混合稀土加入量对高锌镁合金组织与性能的影响规律。结果表明:混合稀土的加入使基体组织得到了细化,力学性能提高。当加入1.5%混合稀土时可获得最佳的综合力学性能,室温抗拉强度达到203 MPa,比原合金提高了21%、冲击韧性达到峰值为4.06 J/cm2。The high zinc magnesium matrix composite was fabricated by adding mix race earth into the molten high zinc magnesium alloy using common casting. The effects of mix race earth on microstructure and mechanical properties of high zinc magnesium matrix composites were investigated by optical microstructure, X - ray diffraction, pull stretch test and impact test etc. It is found that with the increasing mix race earth addition in high zinc magnesium alloy, the matrix was refined ,and the mechanical properties of the material were improved. When mix race earth addition is 1.5%, excellent properties can be obtained. The room temperature intension of the material is 203σb and rise by 21% and impact toughness of the material can reach 4.06 J·cm^-2

关 键 词：高锌镁合金 混合稀土 晶粒细化 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]