2015 年 56 巻 8 号 p. 1242-1247
The weldability of magnesium alloy T-joint using laser-TIG hybrid welding heat source with cold filler wire was studied in this paper. The effects of welding parameters (wire feeding angle α, wire feeding speed VW, welding speed V, shielding gas flow rate acts on either of the connect corner QC, the distance between filler wire and laser beam DLW) on weld appearance and penetration were discussed. Results show that high-quality magnesium alloy T-joint can be achieved by adjusting the parameters. Shearing test result indicates that shear strength of the T-joint welded by laser-TIG heat source can be as high as 92.3% of that of base metal.