hole in weld bead

admin

Hi,Looking for some input. Pretty often my welds turn out with holes in the bead. Does this mean I am moving to fast?I am using a Miller 130. Attached Images
Reply:Thats caused by lack of shielding gas or very dirty material(or both). Try grinding back to clean metal before welding and post back with the FLOW rate on you regulator, then people can make an informed stab at the actual problem.Your not going too fast though.
Reply:Watch your stick out and make sure there is no moving air blowing the gas away.
Reply:Or, (this one gets me from time to time) pull the torch nozzle and look for built-up spatter obstructions in and around the gas diffuser holes in the torch. Definitely porosity from poor shielding gas coverage like the other posters mentioned.
Reply:I usually do grind clean the area pretty well . Unless the regulator is off , I have it set at 23. I do keep an eye on slag build up in the cone and keep it clean.
Reply:It looks good in one spot, so it's probably not low flow rate or it would be porous all over most likely. Clean the metal of oils 'n stuff (millscale even), make sure you can hear/feel gas coming out and your flow meter is giving you a practical reading, and weld between gusts of wind ;-)Last edited by MikeGyver; 07-25-2011 at 08:21 PM.Welding/Fab Pics: www.UtahWeld.com