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.
通过加氢处理、改进添加剂配方及废油再生可以减少矿物油基淬火油对环镜的危害。
The harm of mineral oil based quenching oil to environment can be weakened through hydrogenation, improvement on addition component, and regeneration of wasted oil.
是指将小尺寸的外圈，内圈和所有滚动体直接从熔炉里抛到冷却油中进行淬火的工艺过程。
Drop hardening: the process of dropping small cups and cones and all rollers directly from the drop hardening furnace into an oil bath which quenches them.
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