摘要
Mg合金和Al合金具有密度小、比强度高、导热性好等一系列优点,近些年来,Mg合金和Al合金异种金属焊接在航空航天、汽车制造工业等领域有广泛的应用需求。但是,采用传统的铆接和熔化焊等方法连接Mg/Al异种金属时,获得的接头质量差,Mg/Al异种金属的焊接研究已成为国内外学者研究的热点。针对Mg/Al异种金属的焊接时易形成脆性金属间化合物(IMC)如Mg_(17)Al_(12)和Mg_2Al_3的特点以及存在的问题,综述了Mg/Al异种金属常用焊接方法、工艺特点及应用情况,论述了一些重要的工艺参数及其对焊缝质量的影响,并对显微组织和冶金反应进行了描述,讨论了焊缝的硬度、拉伸性能和疲劳强度等力学性能。并对Mg/Al异种金属的焊接研究方向进行了展望,为后续研究提供基础。
Magnesium alloys and aluminum alloys have the remarkable characteristics such as low density,high specific strength,and good thermal conductivity and so on.In recent years,welding of dissimilar Mg and AI has been widely used in the fields such as aerospace,automobile manufacture and so on.However,the quality of welding Mg/A1 is poor using traditional connection method of riveting and fusion due to the formation of brittle intermetallic compound（IMC）such as Mgl7 All2 and Mg2 A13 ,the welding of Mg/A1 alloy has become a hot spot in domestic and foreign scholars.In view of the char-acteristics of welding Mg/A1 dissimilar metals and the existing problems,the common welding methods,characteristics and application of Mg/AI alloy are summarized in this paper.Some important processing parameters and their effects on Mg/A1 weld quality are discussed,and the microstructure and metal-lurgical reaction are described.Mechanical properties of welds such as hardness,tensile and fatigue strength are discussed,the advantages and disadvantages of various welding technology are forecasted and prospected,and providing a basis for follow -up research.
作者
龙琼
路坊海
张玉兰
罗勋
Long Qiong;Lu Fanghai;Zhang Yulan;Luo Xun(Guizhou Key Laboratory for Preparation of Light Metal Materials, Guizhou Institute of Technology, Guiyang 550003, Chin)
出处
《轻金属》
CSCD
北大核心
2018年第2期47-53,共7页
Light Metals
基金
国家自然科学基金(51664009)
国家自然科学基金(51664010)
贵州省科技计划项目(黔科合基础[2016]1067)
贵州省科技计划项目(黔科合LH字[2016]7101)
贵州理工学院高层次人才启动项目(XJGC:20161212)
关键词
镁合金
铝合金
焊接
金属间化合物(IMC)
力学性能
magnesium alloy
aluminum alloy
welding
intermetallic compound （IMC）
mechanical property
