I am new to MIG welding and tried it a couple of times using mild steel tubing (1/8" thick) on some projects. I have noticed that as the welds cool, the mild steel begins to warp. I heard that tack welding (welding small area) should be done to secure the two pieces in position before putting a bead of weld over the entire weld area. What is the technique or secret I should be using? Should I wait to allow the tacks to cool (for how many minutes) before welding long beads? Should I avoid welding long beads? Should I be looking at the spark and making sure it hits the exact area I want to weld?
Any advice for a beginner is appreciated. I would like to get near expert welding results if possible. |