中文摘要：

在 Mg-Zn-Y-Mn 包含的球形的伪水晶的效果在微观结构和当演员组上掌握合金 ZA155 高锌镁合金的机械性质借助于光显微镜学， XRD， SEM，版本，张力的测试，影响测试和坚硬测试被调查了。球形的伪水晶的增加在 Mg-Zn-Y-Mn 主人合金包含了进 ZA155 高锌镁合金的试验性的结果表演导致了矩阵的谷物精炼，改变从连续网状的结构的 -Al2Mg5Zn2 阶段和到不连续的像长带的结构和短而粗的结构的 -Mg32(Al,Zn)49 阶段的形态学， respectively.In 现在的研究，增强的 ZA155 高锌镁合金的最好的全面机械性质被获得了什么时候在如此的情况中，房间温度张力的力量到达了 207 MPa，大约 23% 比基础合金的高；影响坚韧在 5.5 J/cm2 达到顶点，大约 40% 比基础合金的高；并且提高温度的张力的力量到达了 203 MPa，显示改进了热抵抗。

英文摘要：

Effects of spherical quasi-crystal contained in Mg-Zn-Y-Mn master alloy on the microstructure and as-cast mechanical properties of ZA155 high zinc magnesium alloy have been investigated by means of optical microscopy,XRD,SEM,EDS,tensile test,impact test and hardness test.Experimental results show that the addition of spherical quasi-crystal contained in the Mg-Zn-Y-Mn master alloy into the ZA155 high zinc magnesium alloy resulted in grain refinement of the matrix,changing the morphologies of φ-Al2Mg5Zn2 phase and τ-Mg32（Al,Zn）49 phase from continuous net-like structures to discontinuous strip-like structure and blocky one,respectively.In the present research,the best comprehensive mechanical properties of reinforced ZA155 high zinc magnesium alloy has been obtained when 5.0wt% spherical quasi-crystal was introduced from the Mg-Zn-Y-Mn master alloy into the target alloy system.In such case,the room-temperature tensile strength reached 207 MPa,about 23% higher than that of the base alloy;the impact toughness peaked at 5.5 J/cm2,about 40% higher than that of the base alloy;and the elevated-temperature tensile strength reached 203 MPa,indicating improved heat resistance.