second attempt

admin

Hey guys went out to weld again Tuesday night and I haven't had a chance to update till now, anyway here they are. Settings are 120 amps and I had the pedal set at 35 this time still don't have that much confidence and control as you can see by the cold welds after a few passes I started to get a feel for the head though. Also the last picture has no filler and I'm assuming that the dark stuff on the weld is due to not enough gas coverage. This is 1/8" and im running 17cfh argon Attached Images
Reply:Definately looking better. Yes a few look cold, Don't ask me to try and point them out the way you have welds all over the place. ( I think we covered this before, yes?) A few look like they may be a bit hot, are you letting the plate cool between passes and working on more than one plate? Looks like you could stand to dip a bit closer together on most.Looking good, keep it up.
Reply:Are you using a gas lens? I have been using a #7 nozzle with 1/16 and 3/32 red tungsten’s and getting some good results on some scrap stainless I got from work. My recommendation would be to not worry much about the shininess of the weld, but worry about the bead shape and rings first. I got my self all pissed off one night trying to make shiny SST welds, turns out the pieces were just too small to run long beads on and the whole part was getting too hot.-Dan
Reply:Originally Posted by DSWDefinately looking better. Yes a few look cold, Don't ask me to try and point them out the way you have welds all over the place. ( I think we covered this before, yes?) A few look like they may be a bit hot, are you letting the plate cool between passes and working on more than one plate? Looks like you could stand to dip a bit closer together on most.Looking good, keep it up.
Reply:Be careful working on the back side of a plate that you had issues on. You can pull the crud thru the plate and contaminate the welds on the other side. the same thing can happen on new plain steel if you over heat the plate. Scale will form on the back side from the heat and you can pull it thru into your welds if you don't let the plate cool enough on thinner materials. I always try and grind/sand both sides to remove the mill scale on practice pieces like these. Drove me crazy the first time I had it happen. I made beautiful welds on one test strip, then crappy welds on plate #2. Couldn't figure out what I was doing wrong.There seemed to be no reason why the welds would sudenly go bad, then good, then bad again. My instructor pointed out what the problem was, that I was pulling bad metal into my welds thru my practice plates. After that I only worked with clean ground steel and the problem vanished.good luck.