RJT
Titanium
- Joined
- Aug 24, 2006
- Location
- greensboro,northcarolina
Had a welder who used to do this for us, retired and out of the picture. We make heated metering pumps (medical) and have to plug and weld the ends of fluid lines. Pump bodies are 440C stainless, plugs made from 440C, about 3/8 diameter, 1/2 inch long press fit into the holes. . We put a .06 chamfer on the plug and the hole to fill with weld. We have had cracking problems in the past, so now we stress relieve after welding, then do our finish machining , then vacuum heat treat , then surface grind. TIG welding, what rod would you use? Tried laser welding, and found micro cracks. Can not change material (FDA approved process).