Often called cold treatment or deep freezing. Steel is exposed to suitable subzero temperatures (-85 C or lower) for the purpose of obtaining desired conditions or properties such as dimensional or micro- structural stability. May also reduce retained austenite
A heat treatment method used to harden the surface of some parts via the use of a flame, followed by an oil quench
Precipitation Heat Treatment
Any of the various aging treatments conducted at elevated temperatures to improve certain mechanical properties through precipitation from solid solution.