Originally posted by rayhuang
My borther and I have been cryogenically freezing parts on our karts for years and use a place only about 20 minutes away from here. He is a Kart racer himself and runs 125cc Shifter class.
Give me or my brother Pierre a call at work and well talk to you about the cryo work. He does one run a week and takes about a a week to get your stuff back.
Uh, not to burst a bubble, but I'm a mechanical engineer at a Masters level with minor in metalurgy. I've read a few papers on cryo treating brake rotors and other parts for increased life etc...
Bottom line is there is no measureable impact on metalurgical performance of the parts after cryo treating them. There is no change in microstructure that would improve the performance. All studies to the contrary are of low sample size and not exactly of the scientific methods. Any improvements in performance are most likely perceptual and along the lines of the placebo effect.
Specifically, the metal does not go through a phase change to re-align the microstructre during the cooling or heating process.
Probably (speculation here...) the only impact you can make is the thermally induced stress gradients across the thickness of the parts. All this really does it work harden them. If at all or enough to matter.
This sounds like techno babble - but trust me. Cryo doesn't do d|ck. There is a reason you don't hear about everybody doing this stuff in major race classes. (shifters don't fall into that catagory, sorry)
Annodizing is another thing entirely....