Will 0-1 benifit from Cryo

[blgoode]

Dan gave you the info you needed, but it is also worth pointing out that before the martensite sets, that blade is austenite- the stuff at 1600F that you forge so easy because it is so soft. All I have ever needed was my hands, the stuff is like putty. In fact be very careful, there is no resilience or elasticity to the stuff. When you striaghten a blade at room temp you will have to push beyond the point you want because of the spring. Not so with an austenitic blade, it is very easy to over bend it. I have left my finger impressions on very thin ground edges before by getting too zealous with my tweaking . I like to have a 2x4 laying on the bench for something flat, non abrasive and softer to push against.

Wow! That actually makes since I'll retain this stuff if I keep pounding it in!!

 

[mete]

To add to my comments - the Mf of 52100 is 235F, while that of O-1 is about 100F. So cooling each to 150-120F can mean differences in retained austenite - 52100 is completely transformed while O-1 is not .Another good example of the fact that each steel is different and each should be treated differently. ..... The Ms for 52100 is 480F and that of O-1 is about 400....BTW the faster you go through the martensite transition zone the less retained austenite !