铸造高强耐热Mg-Y-Nd(-Gd)-Zr和Mg-Gd-Y-Zr系镁合金组织性能和铸造缺陷对比  

Contrast of Microstructure, Mechanical Properties and Casting Defects Between High Strength and Heat Resistant Mg-Y-Nd(-Gd)-Zr and Mg-Gd-Y-Zr Magnesium Alloys

作　　者：陈荣石[1] 周波 李吉林[1,3] 单智伟 CHEN Rong-shi;ZHOU Bo;LI Ji-lin;SHAN Zhi-wei(Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,Liaoning,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,Liaoning,China;College of Materials Science and Engineering,North Minzu University,Yinchuan 750021,Ningxia,China;State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,Shaanxi,China)

机构地区：[1]中国科学院金属研究所,辽宁沈阳110016 [2]中国科学技术大学材料科学与工程学院,辽宁沈阳110016 [3]北方民族大学材料科学与工程学院,宁夏银川750021 [4]西安交通大学金属材料强度国家重点实验室,陕西西安710049

出　　处：《铸造》2021年第1期15-20,共6页Foundry

摘　　要：以Mg-Y-Nd(-Gd)-Zr和Mg-Gd-Y-Zr系高强耐热镁合金为分析对象,从铸造成形方法和铸造缺陷两个方面进行了比较。结果表明,这些合金可以采用砂型铸造、金属型铸造、熔模铸造、低压熔模铸造和半固态触变成形等方法铸造;铸造缺陷(如热裂和疏松等)形成机理及其对力学性能的影响与其他合金相比没有明显区别;建立了疏松缺陷与力学性能的关系。The casting processes and casting defects in several high strength and heat resistant cast magnesium alloys are reviewed in this paper. These alloys can be fabricated by sand casting, permanent casting, investment casting, low pressure investment casting and thixoforming. The formation mechanism of casting defects such as hot tearing and porosity and their influence on mechanical properties are similar to other alloys. The relationship between porosity and mechanical properties was also established.

关 键 词：高强耐热 镁合金 铸造工艺 铸造缺陷 

分 类 号：TG292[金属学及工艺—铸造]