Repair Welding of Casting Magnesium Alloys:A Review
Repair Welding of Casting Magnesium Alloys:A Review作者机构：National Engineering Research Center of Light Alloys Net Forming and State Key Laboratory of Metal Matrix CompositeShanghai Jiao Tong UniversityShanghai 200030China Shanghai Aerospace Precision Machinery InstituteShanghai 201600China
出 版 物：《上海航天（中英文）》 (Aerospace Shanghai（Chinese&English）)
年 卷 期：2022年第39卷第1期
页 面：15-30页
学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化]
基 金：the National Natural Science Foundation of China(Nos. U2037601,51821001,51775334) the Research Program of Joint Research Center of Advanced Spaceflight Technologies of China(No. USCAST2020-31)
主 题：Mg alloy repairing welding technology defect heat treatment
摘 要：Magnesium (Mg) alloys have broad application prospects in the fields of aerospace,national defense,and military industries,owing to their advantages of high specific strength and stiffness,good damping properties,and excellent castabilities. However,defects such as oxidation inclusions,shrinkage cavities and porosities,and hot cracks are readily generated in Mg alloy components,which seriously reduce the performance stability of the products. Related repair welding technologies for Mg alloys can greatly reduce the rejection rate and production cost,and exhibit significant value in scientific research and engineering application. In this review,the weldability of Mg alloys is introduced firstly according to their physical and chemical properties. Then,various repair welding technologies and pre-weld treatments applicable to Mg alloys are systematically summarized,and the effects of welding parameters as well as heat treatments on the microstructure and performance of the repaired joints are clarified. Finally,the existing problems and development trends of repair welding technologies for Mg alloys are summarized based on the actual engineering application requirements.
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