Quote:
Originally Posted by Jim Bailey
The key is to not "shock" the part by cooling it too quickly, and to not warm it back to room temp too quickly. The program we used for a ring and pinion was 8 hour descend, 8 hour soak, 8 hours back to ambient, follow by a 2 hour "normalizing" where the parts are warmed to +200 degrees for an hour, then allowed to cool to room temp all by them self. Good Cryo machines can do all these steps without ever opening the machine once a run begins. There will be little, if any, effect on the parts heat treatment. Additionally, the Timed Steps of the run are based on the total weight of the parts in the machine... If you really want to "see" cyro in action, treat your Drill Bits, Mills, and Lathe Tooling... Now you know the rest of the story. ...
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Jim,
Do you treat different types of parts to different process times? Ring & pinion, valves, and valve springs have all been mentioned. I would imagine that some stick shift racers treat transmission gears. Interested in your comments. Trying to learn more about this process.