DING Zhi-bing, LU Ruo-peng, HOU Hua, ZHAO Yu-hong
（School of Materials Science and Engineering， North University of China， Taiyuan 030051， China）
Abstract： The effects of two different casting methods on the microstructures and mechanical properties of as-cast and T6-cast states of Mg-10Gd-3Y-0.6Zr alloy were studied by using metal mold casting and squeeze casting. The results show that the microstructure of Mg-10Gd-3Y-0.6Zr alloy is mainly composed of α-Mg primary phase and Mg24(Gd,Y)5 eutectic phase. The squeeze cast grains are small with a dendrite like morphology, and the tensile strength of the alloy in T6 state can reach 285 MPa. While the metal grains are coarse, the eutectic phases are distributed in the grain boundary, and the tensile strength of the alloy in T6 state is only 250 MPa.
Key words： squeeze casting; metal mold casting; Mg-10Gd-3Y-0.6Zr alloy; microstructure; mechanical property
CLD number： O614.22 Document code： A
Article ID： 1674-8042（2018）02-0194-05 doi： 10.3969/j.issn.1674-8042.2018.02.015
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不同铸造方法对Mg-10Gd-3Y-0.6Zr合金组织形貌及力学性能的影响
丁志兵， 鲁若鹏， 侯华， 赵宇宏
（中北大学 材料科学与工程学院， 山西 太原 030051）
摘要:采用金属型和挤压铸造两种不同铸造方法对铸态和T6态Mg-10Gd-3Y-0.6Zr合金的组织形貌和力学性能进行研究。 结果表明， Mg-10Gd-3Y-0.6Zr 合金铸态组织主要由α-Mg 初生相和 Mg24(Gd,Y)5共晶相组成； 挤压铸造所得合金晶粒细小， 且呈枝晶状形貌， T6态时合金抗拉强度可达285 MPa； 金属型所得合金晶粒较粗大， 共晶相呈网状分布在晶界处， T6态时合金抗拉强度只有250 MPa。
关键词:挤压铸造； 金属型铸造； Mg-10Gd-3Y-0.6Zr 合金； 组织形貌； 力学性能
引用格式：DING Zhi-bing, LU Ruo-peng, HOU Hua, et al. Effect of different casting methods on microstructure and mechanical properties of Mg-10Gd-3Y-0.6Zr alloy. Journal of Measurement Science and Instrumentation, 2018, 9(2)： 194-198. ［doi： 10.3969／j.issn.1674-8042.2018.02.015］
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