随着能源日趋紧张以及现代化工业发展需要,淬火介质越来越受到人们的高度重视。特别是近十几年,新型淬火介质的研究,国内外均列入重点开发项目。水和油是传统的淬火介质。纯水淬火缺点太多,所以继而发展了盐水和碱液淬火,它们虽能提高水在奥氏体最不稳定区的淬火烈度,但在低温马氏体转变区冷却速度仍与水相同,变形开裂问题依然难以解决,况且碱液腐蚀性强,操作时易飞溅伤人。因此,对于一些工艺性能要求较高的零件往往采用油淬。但是使用矿物油,不仪有能源问题, With the increasingly tense energy and the needs of the development of modern industry, quenching medium has drawn more and more attention from people. Especially in recent ten years, the research of new quenching medium has been included in key development projects at home and abroad. Water and oil are traditional quench media. The disadvantages of pure water quenching are too much. Therefore, salt water and alkali solution are further developed. Although they can raise the quenching intensity of water in the most unstable region of austenite, the cooling rate in the low-temperature martensite transformation zone is still the same as that of water, Cracking problem is still difficult to solve, Moreover, caustic alkali corrosive, easy to splash wounding operation. Therefore, some of the higher performance of the parts are often used oil quenching. However, the use of mineral oil, not having energy problems,