hardening and tempering

• 调质

hardening and tempering的用法和样例：

例句

1. The application of nonhardened and tempered steel is predicted.
   并预测了非调质钢的应用前景。
2. Being compared with the normalized steel,the quenched and tempered steel can led to a joint with higher strength and toughness.
   正火态与调质态母材相比，后者可得到强韧性较高的接头。