explosion hardening

例句：

1. 1. The steel undergoes an explosion hardening process to increase its strength and toughness.
   钢材经过爆炸硬化处理，以增加其强度和韧性。
2. 2. During the manufacturing process, the material is subjected to explosive hardening to improve its durability.
   在制造过程中，材料受到爆炸硬化处理，以提高其耐用性。
3. 3. The engineers used a special alloy that undergoes explosive hardening during the welding process.
   工程师们使用了一种特殊的合金，这种合金在焊接过程中会经历爆炸硬化。