jwhit, we normaly air arc and grind the bad spots out, when I talked about burning into the casting, I noticed that at the end of the spot I was welding, I was seeing real porous looking metal just under the surface, but yes, the company is just making us cheat and do whatever it takes to get...
im not real familiar with the melting and pouring process, I do know that they use a quick set sand mold,gas holes are one problem we run into, one thing I have discovered, is that if I weld the red spots with 330 then beat the weld with a jack hammer, the spots go away. but I know this is only...
I am a welder in a stainless foundry, every time they cast hk40, the casting is lpi tested. the casting is always covered in red spots, that are not cracks. we gouge all the spots, and weld them with er-310 and no matter what we do, the spots don't go away. also, when we burn into the casting...
