将一种金属或合金放在一个密闭容器中对其退火。在对某一铁基合金进行闭箱退火时，通常将装料缓慢加热到低于(但有时高于或位于)转换温度范围的某一温度，然后缓慢冷却。

In box annealing a ferrous alloy, the charge is usually heated slowly to a temperature below the transformation range, but sometimes above or within it, and is then cooled slowly.

youdao