Retreatment of Steel
Retreatment of Steel
(OP)
A batch of our torsion springs were heat treated to the wrong hardness (too soft-RC42 vs RC46-48). The metal is 9254. Is there any reason these couldn't be rehardened?
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RE: Retreatment of Steel
RE: Retreatment of Steel
RE: Retreatment of Steel
RE: Retreatment of Steel
Also, these have already been shotpeened. I assume that will have to be redone.
RE: Retreatment of Steel
By all means sacrifice a couple of springs and have a met. lab. look for decarb. That can be a spring-killer, even on the 1st HT.
RE: Retreatment of Steel
I would not reharden unless I annealed the parts first.
Yes the shot-peening will have to be redone. Be careful with your intensity as it will be different this time around. I would talk with my shoot peening provider.
With a good atmosphere furnace and oil quenching Decarb should be no problem.
Watch where you take your hardness readings.