|
When tools and other heat treated metals are cooled to very cold temperatures, minus 100F or below, unstable phases are transformed, making the part very stable at normal use temperatures. This treatment is performed by slowly cooling the parts in a controlled bath of liquid nitrogen or other refrigerant, and held until the temperature of the part has reached the target temperature, then returning the part to room temperature. The resulting part will have low distortion tendency, and often is significantly stronger and tougher.
|
