快速渗氮工艺的最新进展

简述了当前深层渗氮工艺的发展应用情况,介绍了本单位针对32Cr3MoVE钢开展的深层渗氮研究工作,以及该钢深层渗氮件与18CrNi4A渗碳件在4508MPa接触应力下的对比试验结果.本文对常规离子渗氮、循环离子渗氮、增压渗氮、低压脉冲渗氮、稀土催渗渗氮、形变促渗渗氮、高温渗氮等快速渗氮工艺方法的发展和存在的主要问题进行了总结,分析了以深层渗氮替代渗碳工艺尚须开展的工作.

The Recent Development of Rapid Nitriding Techniques

In this paper, the recent development and application of deep-level nitriding technique was presented concisely. The work of BIAM on deep-level nitriding techniques for VIM-VAR 32Cr3MoVE steel, and the results of rolling contact fatigue test for deep-level nitrided 32Cr3MoVE and earburized 18CrNi4A parts were stated. Then the advantages and disadvantages of popular rapid nitriding techniques were summarized, including conventional plasma nitriding, ion-nitriding by cyclic nitrogen potential, ionnitriding by thermal cycle, pressurized gas nitriding, Rear-earth-energized nitriding, deformation-accelerated nitriding, and high-temperature nitriding. Finally, the research work to do in future for nitriding replacing carburizing were analyzed.