Nitrofreeze maximizes stress relief in cast, heat treated and forged aluminum parts. The quenching procedure involves the utilization of a controlled cryogenic chamber where the parts are cooled to ultralow temperatures by utilizing liquid nitrogen or liquid helium. Once the components have reached the low temperature, they are subjected to a controlled warming cycle to a higher temperature appropriate for the alloy. The process is repeated up to six times, each following the same cool down and “uphill” quenching cycle. The process typically operates within a range of -450°F (-268°C) on the low side and up to 450°F (262°C) at the high side.
Cryogenic Institute of New England Inc., (508) 459-7447
September 23, 2010