快速淬火硬化的钢是硬而易碎的，不适合大多数场合使用。
Steel that has been hardened by rapid quenching is brittle and not suitable for most uses.
在滚动接触组成部分，作为一项规则，通过硬的快速淬火油或盐温泉浴的加热元件。
The rolling contact components are, as a rule, through-hardened by swiftly quenching the heated components in oil baths or salt baths.
淬火：指从某一高温快速冷却的过程。产品被放置于液体或气体中接触，通常是油，水或者空气。
QUENCHING: The process of rapid cooling from an elevated temperature. The product is placed in contact with liquids or gases, usually oil, water, or air.
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