名词短语
中文翻译：真空热处理
同义词：
['vacuum heat treatment', 'vacuum annealing']
例句：
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1.This process is commonly used for the vacuum heat treatment of steel.
这个过程常用于钢铁的真空热处理。
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2. The vacuum heat treatment helps to improve the strength and hardness of the material.
真空热处理有助于提高材料的强度和硬度。
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3.During the vacuum heat treatment, the material is heated to a high temperature and then cooled rapidly to achieve the desired properties.
在真空热处理过程中，材料被加热至高温，然后迅速冷却以获得所需的性能。