分别是淬火，回火，退火，正火。

Heat quench heat temper heat anneal heat correctitude.

包括喷雾和直接淬火。

Includes spray and direct quenching.

预剪切、淬火、精整；

Precuutting, quenching, final finishing;

极大地提高淬火件光亮度。

Greatly improve the quenching brightness.

提高碳素工具钢的淬火质量。

Improve the quenching quality of the carbon tool steel.