hardening of steel
Bringing the metal to the condition in which it is best able to resist abrasion or scratching. This is accomplished by heating the steel to a high temperature and cooling quickly, or by mechanical working. (Bridge, 2019)
Bringing the metal to the condition in which it is best able to resist abrasion or scratching. This is accomplished by heating the steel to a high temperature and cooling quickly, or by mechanical working. (Bridge, 2019)