Spray quenching of metal with liquid coolant containing dissolved gas

摘要

A method of quenching a metal object having steps of: (a) providing a liquid coolant having a temperature from about 100° F. to about 180° F. and containing about 0.01 to about 0.1 standard cubic feet of carbon dioxide gas per gallon of water dissolved therein; and (b) spraying the liquid coolant on the metal object to quench the metal object.