中厚度镁合金激光焊接组织与性能分析Microstructure and mechanical properties of laser welded AZ31 magnesium alloy with moderate thickness
谭兵;张海玲;陈东高;冯杰才;齐果;吕绯;
摘要(Abstract)：
采用CO2激光焊接方法对10mm厚的AZ31镁合金进行焊接。利用光学显微镜、扫描电镜、X射线衍射仪等手段分析焊接接头的宏观形貌、显微组织、元素分布和焊缝物相等。结果表明:焊缝正面凹陷,背部成形较好;焊缝组织为细小的等轴晶粒,物相主要为Mg,未出现Al-Mg低熔点相;接头强度均值为212MPa,在断口处存在大量的气孔。
关键词(KeyWords)： AZ31镁合金;激光焊;微观组织;力学性能
基金项目(Foundation):
作者(Author): 谭兵;张海玲;陈东高;冯杰才;齐果;吕绯;
Email:
DOI:
参考文献(References)：
- [1]李元元,张卫文,刘英.镁合金的发展动态和前景展望[J].特种铸造及有色金属,2004(1):14-17.
- [2]Toshikatsu A,Hiroshi L,Kazuyoshi K.Solidification crack sensi-tivity of TIG welded AZ31magnesium alloy[J].Journal of Japan Institute of Light Metals,1999,49(12):595-599.
- [3]Weisheit A,Galun R,Mordike B L.CO2laser beam welding of magnesium-based alloys[J].Welding Research Supplement,1998(4):149-154.
- [4]张华,林三宝,吴林,等.镁合金AZ31搅拌摩擦焊接头的微观组织[J].中国有色金属学报,2003,13(6):1510-1513.
- [5]宋刚.激光-TIG复合焊接镁合金AZ31B焊接工艺[J].焊接学报,2004,6(3):31-34.
- [6]Stun W M.Arc augmented laser processing of materials[J].Journal of Application Physics,1980,51(11):5636-5641.
- [7]Sanders P G,Keske J S,Leong K H,et al.High power Nd:YAG and CO2laser welding of magnesium[J].Laser Applicantion,1999,11(2):96-103.
- [8]Leong K H,Kornecki G,Sanders P G,et al.Laser beam welding of AZ31B-H24alloy[C].ICALEO98:laser Materials Processing Conference,1998(12):28-36.
- [9]王继锋,刘黎明,宋刚.激光焊接AZ31B镁合金接头微观组织特征[J].焊接学报,2005,25(3):15-18.