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1. During the hardening period, the steel is being tempered to improve its strength and toughness.
在硬化期间，钢铁正在被热处理以增强其强度和韧性。
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2. The process of hardening involves heating the material until it reaches a certain temperature and then cooling it rapidly toachieve the desired properties.
硬化过程涉及将材料加热至一定温度，然后迅速冷却以达到所需性质。
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3.The hardening period is crucial for the development of the material's structure and properties.
硬化期对于材料结构与性质的形成至关重要。