A process of hardening the face of steel as armor plates invented by Hayward A Harvey of New Jersey consisting in the additional carburizing of the face of a piece of low carbon steel by subjecting it to the action of carbon under long continued pressure at a very high heat and then to a violent chilling as by a spray of cold water This process gives an armor plate a thick surface of extreme hardness supported by material gradually decreasing in hardness to the unaltered soft steel at the back
View Judgments Citing this Phrase