Post-weld heat treat for part to be hardened after weld,
Post-weld heat treat for part to be hardened after weld,
(OP)
My company makes specialty hand tools. When possible, we weld together parts of standard tools. Most of the time, the material is 4140 and we heat treat it to somewhere between 40 and 50 HRC after welding. In the past, post-weld subcritical annealing has been done, probably due to a generic suggestion from the heat treater or welder. All heat treatment is done at a different facility than the welding. Therefore the parts cool to room temperature (or below) before the anneal. After anneal, the parts cool and then are heated, quenched, and tempered.
Is there any reason for the sub-critical anneal before Q+T heat treatment? I don't see any benefit, unless it could be done before the part fully cools after weld, which is not the case.
Is there any reason for the sub-critical anneal before Q+T heat treatment? I don't see any benefit, unless it could be done before the part fully cools after weld, which is not the case.





RE: Post-weld heat treat for part to be hardened after weld,
RE: Post-weld heat treat for part to be hardened after weld,
RE: Post-weld heat treat for part to be hardened after weld,
RE: Post-weld heat treat for part to be hardened after weld,
RE: Post-weld heat treat for part to be hardened after weld,
Maui
RE: Post-weld heat treat for part to be hardened after weld,
RE: Post-weld heat treat for part to be hardened after weld,
Make sense?
Maui
RE: Post-weld heat treat for part to be hardened after weld,
RE: Post-weld heat treat for part to be hardened after weld,
RE: Post-weld heat treat for part to be hardened after weld,
RE: Post-weld heat treat for part to be hardened after weld,