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热处理用油是金属材料进行淬火冷却和回火等热处理工艺时应用的一种油。一般分为普通淬火油、光亮淬火油、真空淬火油、等温分级淬火油及回火油五个品种。它们都是从石油中提炼出来后经精炼和加工而成。实际上,原先淬火油包括动物油、植物油和矿物油,前两者的主要成分分别是饱和的和不饱和的高级脂肪酸的甘油酯,都由于成本高和易于老化而淘汰。矿物油的主要成份是烃。
Heat treatment oil is a metal material used for quenching and tempering heat treatment process, such as an application of oil. Generally divided into ordinary quenching oil, bright quenching oil, vacuum quenching oil, isothermal quenching oil and quenching oil five varieties. They are all refined and processed after being extracted from oil. In fact, the original quenching oils include animal oils, vegetable oils and mineral oils, the former two being the major components of saturated and unsaturated higher fatty acid glycerides, both eliminated due to high costs and ease of aging. The main component of mineral oil is hydrocarbons.