【摘 要】
：
Automatic gas tungsten arc (GTA) welding has been utilized to connect AZ31 magnesium alloy butted plates with AZ61 and AZ61-1.0Sb filler wire. Contrasted to AZ6
【机 构】
：
State Key Laboratory of Material Surface Modification by Laser,Harbin Institute of Technology
论文部分内容阅读
Automatic gas tungsten arc (GTA) welding has been utilized to connect AZ31 magnesium alloy butted plates with AZ61 and AZ61-1.0Sb filler wire. Contrasted to AZ61 filler wire, the AZ61-1. 0Sb filler wire holds a component of 1wt% antimony ( Sb ). In the present work, proper welding technology paraneters were explored. And the microstructure and performance of welded joints were analyzed to research the influence of Sb on magnesium alloy welded joint. Observed from the microstructure of welded joint, addition of Sb has refined crystal grains and changed the pattern of eutectic in bead and heataffected zone ( HAZ) adjacent to bead from discontinuous reticular to graininess structure, which strengthen the weakness of joint. In addition, because of the anchoring action of Mg3Sb2 phases as well as hampering action to crystal boundary slip, the performance of joint welded by AZ61-1. 0Sb filler wire has been improved.
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