Super_TIG 용접에서 용착속도와 용입에 미치는 C-strip 송급방향의 영향

Abstract

Even though TIG welding has merits to secure the excellent welding quality in almost all materials and is widely used in the entire modern industry, there is a problem of relatively low welding productivity. In general, when the electric current is increased to raise the productivity in TIG welding, various defects like undercut and humping bead occur because of high arc pressure and consequently, this has been a obstacle to productivity improvement. In this study, maximum deposition rate and penetration characteristic of Super_TIG which is using filler metal and was developed to absorb plasma stream more effectively than circular wire were reviewed when its feeding angles were set as 20°, 30°, 40°, 50° by changing its feeding direction to front feeding and side feeding to satisfy each welding purposes. Experiments results in front feeding showed that maximum deposition rate and penetration depth when the feeding angle is 20° are 12.6kg/hr and 0.23mm, and when feeding angle increases to 50°, maximum deposition rate and penetration depth are 10.0kg/hr and 1.44mm. These results showed the tendency that maximum deposition rate decreased and the penetration depth deepened. Experiments results in side feeding showed that maximum deposition rate and penetration depth when the feeding angle is 20° are 11.0kg/hr and 0.41mm, and when feeding angle increases to 50°, maximum deposition rate and penetration depth are 9.0kg/hr and 1.25mm. These results showed the tendency that maximum deposition rate decreased and penetration depth deepened. Additionally, when feeding angles are same in front feeding and side feeding, maximum deposition rate showed the tendency of high front feeding and shallowing tendency at the same penetration depth angles.