淬火是把钢加热到临界温度以上，保温一定时间，然后以大于临界冷却速度进行冷却，从而获得以马氏体为主的不平衡组织（也有根据需要获得贝氏体或保持单相奥氏体）的一种热处理工艺方法。淬火是钢热处理工艺中应用最为广泛的工种工艺方法。 Quenching is a heat treatment method that heats the steel above the critical temperature, holds it for a certain time, and then cools at a rate greater than the critical cooling rate. as a result, the unbalanced structure dominated by martensite (there is also a heat treatment method to obtain bainite or keep single-phase austenite according to the need). Quenching is the most widely used method in steel heat treatment process.