• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 2004, Vol. 40 ›› Issue (8): 123-126.

• 论文 • 上一篇    下一篇

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AZ31镁合金搅拌摩擦焊研究

张华;吴林;林三宝;冯吉才;郭和平   

  1. 哈尔滨工业大学现代焊接生产技术国家重点实验室;北京航空制造工程研究所金属成形技术研究室
  • 发布日期:2004-08-15

FRICTION STIR WELDING OF AZ31 MAGNESIUM ALLOY

Zhang Hua;Wu Lin; Lin Sanbao;Feng Jicai;Guo Heping   

  1. State Key Lab of Advanced Welding Production Technology, Harbin Institute of Technology Department of Metal Forming, Beijing Aeronautical Manufacturing Technology Research Institute
  • Published:2004-08-15

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摘要： 成功实现了2.5 mm厚薄板镁合金AZ31的搅拌摩擦焊接。试验结果表明，接头外观优美，表面光滑，没有裂纹，背部搅拌熔合充分。微观组织、拉伸、弯曲和显微硬度试验显示镁合金的搅拌摩擦焊可以得到良好力学性能的接头(接头抗拉强度达母材强度的90%左右)；显微组织特征显示接头有明显分区，焊缝中心生成等轴、微细的晶粒。

关键词: AZ31镁合金, 搅拌摩擦焊, 力学性能, 微观组织, 显微硬度

Abstract: A series of controlled friction stir welds are manuf- actured successfully using 2.5 mm thick AZ31 magnesium rolled sheet material. The results show that the top surfaces of friction stirred welds are smooth and no crack and the bottom surfaces are full penetration. Results from metallurgical, micr-o-hardness, tensile and bend measurements clearly show that the friction stir welding process can create a segregated banded microstructure and high quality joints.(The ultimate tensile stren-gth canreach to 90% of base metal) The weld nugget is consisted of fine,equaixed grain.

Key words: AZ31 magnesium alloy, Friction stir welding, Mechanical properties, Micro-hardness, Microstructure

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