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热处理淬火用油以轻柴油和锭子油用量最大。淬火过程中，油随淬火量的增加老化程度不断加剧，使冷却性能降低。油又属能源物资，有时供不应求，一般工厂又缺乏冷却性能测试手段和老化油的处理设施，多数工厂淬火油处于无控制的使用，给产品热处理质量带来相当大的影响。一、油老化的本质淬火采用的矿物油是由石腊，环烷、芳香和石腊—芳香系碳氢化合物及这些碳氢化合物的含氧含硫和含氮的衍生物的混合物组成。当赤热的工件和油接触时发生热分解和氧化聚合，长期使用还会形成酸性和
Heat treatment of quenching oil to light diesel oil and spindle oil consumption. Quenching process, the oil with increasing quenching the increasing degree of aging, so that cooling performance decreases. Oil is also an energy source, sometimes in short supply. In general, factories lack the cooling performance test method and aging oil treatment facilities. Most of the factory quenching oils are used uncontrollably, which has a considerable impact on the quality of heat treatment products. First, the nature of oil aging Quenching mineral oil is used by the paraffin, naphthenic, aromatic and paraffin - aromatic hydrocarbons and hydrocarbon hydrocarbon containing sulfur and nitrogen containing a mixture of derivatives. Thermal decomposition and oxidative polymerization occur when a red hot workpiece is in contact with oil, and will form acidic and long-term use