dehardening

例句：

1. 1. The steel was dehardened to remove internal stresses.
   钢材经过退火以消除内部应力。
2. 2.During the manufacturing process, the metal is subjected to a dehardening treatment.
   在制造过程中，金属会经历去应力处理。
3. 3.The engineers decided to deharden the parts before assembly to prevent cracking.
   工程师决定在装配前对部件进行去应力处理以防止开裂。