氩气除氢对AZ91铝合金废料力学性能的影响  

Effect of Argon Dehydrogenation on the Mechanical Properties of AZ91 Magnesium Alloy Scrap

作　　者：焦万才 贾征 宋婷婷 王彤 JIAO Wancai;JIA Zheng;SONG Tingting;WANG Tong(Department of Welding Engineering,Shenyang University,Shenyang 110044,China;Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110819,China)

机构地区：[1]沈阳大学机械工程学院焊接工程系,辽宁沈阳110044 [2]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110819

出　　处：《铸造技术》2020年第9期807-810,共4页Foundry Technology

基　　金：国家自然科学基金资助项目(51901037);辽宁省博士启动基金项目(2019-BS-083);辽宁省自然科学基金指导计划项目(2019-ZD-0561);2019年沈阳大学大学生创新创业训练计划项目(2019110350102)。

摘　　要：研究了氩气除氢对AZ91镁合金废料氢含量及力学性能的影响。结果表明,除气后铸锭的含氢量可从18.4 cm^3/100 g降至10.6 cm^3/100 g,除气率可达42.4%;除气后铸锭的抗拉强度、屈服强度和伸长率分别提高了21.6%、3.6%和56.5%,废料中的MgO夹杂物是降低力学性能的主要原因。The effects of argon degassing on the hydrogen content and mechanical properties of AZ91 magnesium alloy waste were investigated.The results show that the hydrogen content of AZ91 magnesium alloy ingots could be reduced from 18.4 cm3/100 g to 10.6 cm3/100 g,and the degassing efficiency can reach 42.4%.Tensile strength,yield strength and elongation by degassing increase by 21.6%,3.6%and 56.5%,respectively.MgO inclusions in waste materials are the main reasons for reduction the mechanical properties.

关 键 词：AZ91镁合金废料 氢含量 力学性能 MgO夹杂物 

分 类 号：TG243[金属学及工艺—铸造]