1, size exceed the allowable deviation: the weld width, width, thickness, centerline deflection of bending such as deviation, should strictly control the relative position of weld size, qualified rear welding, welding careful operation.
2, surface porosity: the welding position must scrub clean, select the appropriate welding current during the welding process, reduce the welding speed, the gases in the molten pool completely escape.
3, choose the appropriate welding process, welding electrode diameter, welding current, welding speed, etc., through the welding procedure test.
4, skim decontamination treatment: check before welding groove, the assembly gap is in line with the requirements, whether the tack welding, weld around can not have oil. Otherwise should choose vinyl trichloride, benzene, gasoline, neutral detergent or other chemicals with stainless steel wire brush to scrub fuzz, grinder to grind if necessary, grinding out metal surface after welding.
5, should choose the appropriate welding to stainless steel electrode (electrode), and appropriate welding current. Component between the solder joint should be strong, when welding the welds shall be full, on the surface of the weld metal welding wave should be uniform, can not have cracks, slag inclusion, flash, burn through, arc pit and acicular blowhole defects, such as welding area must not have splash.
6, bar after completion of welding assembly, for no obvious dents or protruding larger weld bead weld, can be directly for polishing. For the larger bead weld concave and convex dross or Angle of grinding machine for grinding, polishing after smooth again. After polishing must make appearance bright and clean, smooth, no obvious welding mark.