age hardening

age hardening的音标是[eɪdʒ ˈhɑːdərɪnɪŋ]，基本翻译是“时效硬化”，速记技巧是“时效”即金属经过时效处理后，其内部的应力趋于均匀，并降低其脆性，从而提高其综合力学性能。

Age hardening这个词的英文词源可以追溯到拉丁语“aeger”，意为“老练的”或“成熟的”。这个词在英语中经过了几个变化形式，包括age-harden-aged。

相关单词：

1. Aged - 这个词源于age，表示“老化的”或“陈旧的”。

2. Ageing - 这个词可以指代老化过程，也可以指代食品或葡萄酒等产品的陈年过程。

3. Hardening - 这个词源于hard，表示“变硬的”或“强化”。

4. Age hard - 这个词组表示通过老化过程使材料变硬。

5. Age harden - 这个词组表示通过老化过程使材料变硬并强化。

举例来说，在机械工程中，通过控制材料的老化过程，可以增强其硬度，这就是所谓的“age hardening”。这种技术广泛应用于金属加工中。

以上内容仅供参考，建议查阅专业的英语词典获取更准确的信息。

常用短语：

1. age hardening steel

2. ageing treatment

3. high-temperature ageing

4. low-temperature ageing

5. aging process

6. ageing hardening

7. long-term ageing

例句：

1. This steel is prone to age hardening due to high-temperature exposure.

2. The aging treatment of this alloy has resulted in a significant increase in hardness.

3. The material has been subjected to long-term ageing, resulting in a significant reduction in ductility.

4. The aging process has been optimized to improve the mechanical properties of the material.

5. Age hardening is commonly used in the automotive industry to improve the wear resistance of components.

6. The application of high-temperature ageing treatment can significantly improve the mechanical properties of certain alloys.

7. Low-temperature ageing can be used to improve the toughness of certain materials.

英文小作文：

Age hardening is a common process used in manufacturing to improve the mechanical properties of materials. By subjecting materials to high-temperature or low-temperature conditions, they undergo a process of microstructural changes that result in an increase or decrease in hardness and toughness, respectively. This process can be used to create stronger, more wear-resistant components, or to improve the ductility and fracture toughness of certain materials. In the automotive industry, for example, age hardening is commonly used to improve the wear resistance of components such as gears and bearings. However, it is also important to carefully control the aging process to ensure that the desired mechanical properties are achieved without compromising other important properties such as ductility and toughness.