Wuz heat treating some custom punches yesterday. A2.
Had a stainless envelope laying around - McMaster sells
these. So, as opposed to making my own from foil, by folding
on 3 sides, I used this envelope, that appears to have 3 sides
welded together.
Into the envelope the parts went, all shiny, right off the lathe.
1400 for while, quick ramp up to 1750, 10m there. Onto quench
plates. When they cooled enough, I cut the envelope open and
what da *(&%(*#$&%(*#&
!!!?
The punches came out looking brighter than before the HT
!
I know from countless HT I've done that parts always come out of
the foil with some colors . Not this time ! Glass hard too :thumbup: .
So what is the point you ask ? It is important to crimp the side real well,
when you wrap the part to be HT-d. And, when done right, perfection
is possible
:jerkit:
I'd imagine it is impossible to crimp em absolutely air tight - certainly
no match for welded edges, but do try !
Had a stainless envelope laying around - McMaster sells
these. So, as opposed to making my own from foil, by folding
on 3 sides, I used this envelope, that appears to have 3 sides
welded together.
Into the envelope the parts went, all shiny, right off the lathe.
1400 for while, quick ramp up to 1750, 10m there. Onto quench
plates. When they cooled enough, I cut the envelope open and
what da *(&%(*#$&%(*#&
!!!?The punches came out looking brighter than before the HT
!I know from countless HT I've done that parts always come out of
the foil with some colors . Not this time ! Glass hard too :thumbup: .
So what is the point you ask ? It is important to crimp the side real well,
when you wrap the part to be HT-d. And, when done right, perfection
is possible
:jerkit: I'd imagine it is impossible to crimp em absolutely air tight - certainly
no match for welded edges, but do try !
