[habu68]

A friend that worked in my brother's shop for a while is one of the top micro welders in the country, he specializes in repairing plastic injection molds by welding and machining what are sometimes multi-million dollar molds. He regularly tig welds under a 200 power microscope. I have watched him weld pop cans together and lay a bead along the edge of a razor blade. I have watched him heat treat(aneal) a 3000 lb mold made of h13 to prepare it for welding ,do a small weld, machine and re-heat treat. The weld took less than 15min to do, machining another 2 hrs with set up. But to heat treat the mold took a week bring it up to temp and cooling so the tool did not warp. For a guy like me who can barely stick two pieces of 1/4 inch stock together with the buz box it was a humbling experience.