W2 heat treat

Danbo

Platinum Member
Joined
Nov 28, 1999
Messages
14,979
Heat treated a few W2 blades a little while ago. They were triple normalized, brought to non magnetic a fourth time and very quickly quenched into Park's 50 quenching oil. Agitated quench, meaning I moved the blades back and forth,(not sideways) until they were cool enough to touch with bare hands. Then into the heat treat oven for a two hour temper at 400. Just for the heck of it, they were thrown into a cooler full of dry ice overnight(digital thermometer showed the blades got down to -109), then another two hour temper at 400.

Question I have is; is yet another temper necessary, or is two plenty?
 

jdm61

itinerant metal pounder
Joined
Aug 12, 2005
Messages
47,357
I would temper them again, but at least at 450. 400 probably left them too hard.
 

Danbo

Platinum Member
Joined
Nov 28, 1999
Messages
14,979
Ok, I gave them one more two hour temper at about 425.
 
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