TIG 용접에서 용가재 형상이 그 용융특성에 미치는 영향의 열유속에 의한 평가

Abstract

Future growth industries in the world as a nuclear power plant industry, largely been focused on the importance of welding technology has been proposed. TIG welding in all materials because of the advantage of being able to get superior quality non-ferrous alloys consisting of piping, pressure vessels are widely used in overlay welding, but the problem is low productivity. In general, 1.2mm wire used in auto welding must increase wire feed rate in order to improve productivity through increased wire deposition rate. However, since there is lack of time to absorb arc heat with increased wire feed rate, current must be increased. In this case, there is difficulty in application due to under cut or humping bead from enlarged arc force. This paper is a study on establishment of calculation model for input heat of heat flow filler material based on development of filler material conducted to greatly increase deposition rate.