quench hardening

例句：

1. 1. The steel wasquenched to harden it for the next step in the manufacturing process.
   钢材被淬火以准备下一步生产过程中的加工。
2. 2.Quenched hardening is a technique used in metallurgy to improve the strength and toughness of materials.
   淬火硬化是一种冶金技术，用于提高材料强度和韧性。
3. 3. During quenching, the material is rapidly cooled to a temperature below its melting point, which causes the microstructure to harden.
   在淬火过程中，材料迅速冷却至低于其熔点的温度，这导致微观结构硬化。