austempering

例句：

1. 1. The steel was subjected to austempering before being machined.
   钢材在被加工之前进行了淬火处理。
2. 2.Austempering is an important process in the manufacturing of high-strength steel.
   淬火回火是高强度钢制造过程中的一个重要过程。
3. 3. During the austempering process, the steel undergoes a phase transformation that strengthens its structure.
   在淬火回火过程中，钢材经历相变，增强了其结构强度。