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评估了水、10%的水溶性聚合物溶液以及常规淬火油对碳氮共渗件的淬火性能,并比较了经各种介质冷却后的淬火态和调质态的显微组织。淬硬层中的典型组织为气体碳氮共渗产物(碳氮化合物)-马氏体-残留奥氏体,心部组织为马氏体-残留奥氏体或贝氏体-残留奥氏体。通过研究残留奥氏体和氮碳化合物的含量对硬度、耐磨性和冲击强度的影响,表明使用10%的水性聚(亚烷基)二醇淬火液淬火时的效果最佳。
The quenching performance of water, 10% water-soluble polymer solution and conventional quenching oil on carbonitriding parts was evaluated. The microstructures of quenched and tempered state after cooling by various media were compared. The typical structures in the hardened layer are gas carbonitriding products (carbonitrides) - martensite - retained austenite, heart tissue martensite - retained austenite or bainite - retained austenite . The effect of residual austenite and nitrocarburizing on the hardness, abrasion resistance and impact strength was shown to be best quenched with 10% aqueous polyalkylene glycol quench.