Ar-He 혼합가스와 hot-wire를 이용한 협개선 TIG 용접에 관한 연구

Study on Narrow groove TIG welding using Ar-He of shielding gas & hot wire

TIG welding can produce high quality of weld, but has the disadvantage of low productivity and high possibility of lack-of-fusion especially on heavy wall groove welding. In order to overcome such demerits of TIG welding, the hot-wire method which provides pre-heated wire and the use of He-Ar mixture gas as shielding gas were adopted. Through this study, both methods were turned out to be beneficial to the prevention of lack-of-fusion and the increase of productivity and welding speed.