水溶性聚合物淬火剂在碳氮共渗件淬火中的使用(英文)

Use of Aqueous Polymer Quenchants for Hardening of Carbonitrided Parts

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。

Water, 10% aqueous polymer solutions and a conventional quench oil were evaluated to harden carbonitrided parts. The resulting as-quenched and quenched and tempered microstructures were compared. Typically, the gas carbonitriding process produced （carbonitrides）-martensite-retained austenite in the case and martensite-retained austenite or bainite-retained austenite in the core. The effect of the amount of retained austenite and carbides （carbonitrides） on：hardness, abrasive wear resistance, and impact strength showed that the best results were obtained when a 10% aqueous solution of a polyalkylene glycol quenchant was used.