A Study on the Change of Wire Feeding Speed in GTA Welding (Ⅱ) - Development of Weld Bead Shape Prediction Model -

Throughout the GTA welding (GTAW) process, bead width (Bw), height (Bh), penetration depth (Dp), and metal transfer modes change in accordance with current wire feeding speed. Various processes employing GTAW include text marking systems that have as main management items, some such require sufficiently complete penetration. It is judged there will also be a type advantageous for first layer of pipe root gap. Accordingly, shape prediction model has been proposed according to changes speed, wherein interval are presented heat input ratio (HIR) change.