32Cr3MoVE钢的气体渗氮工艺

为提高32Cr3MoVE钢工件的硬度和耐磨性,对其渗氮工艺进行了研究.结果表明:渗氮过程中采取较低的渗氮温度及较低的氮势,可以有效控制白亮层深度及避免产生粗大的合金氮化物,但渗氮速度较慢;通过氮势门槛值控制的渗氮方法,在渗氮前期可以适当提高氮势,随着渗氮时间的增加,逐步多段地降低氮势,使实际氮势始终维持在氮势门槛值的附...

Gas nitriding process for 32Cr3MoVE steel

In order to improve its hardness and wear resistance, the nitriding process was studied for the 32Cr3MoVE steel workpiece. The results show that the lower nitriding temperature and the lower nitrogen potential adopted in nitriding process can effectively control the depth of bright white layer, and avoid the production of coarse alloy nitrides, but the nitriding rate is slower. By keeping the nitrogen potential maintaining always around its threshold through certain multi-stage control mode, the nitriding process can ensure the nitriding rate, control the depth of bright white layer, and inhibit the formation of brittle phases as well. Finally, the suitable gas nitriding process by nitrogen potential threshold control for 32Cr3MoVE steel is obtained through process test validation.