32Cr3MoVE钢的气体渗氮工艺  

Gas nitriding process for 32Cr3MoVE steel

作　　者：王会斌 邱荣春 陈葵 刘香凝 胡林森 胡云波 黄俊琼 Wang Huibin;Qiu Rongchun;Chen Kui;Liu Xiangning;Hu Linsen;Hu Yunbo;Huang Junqiong(NFAIC High Precision Transmission Co.,Ltd.,Zhuzhou Hunan 412000,China)

机构地区：[1]湖南南方宇航高精传动有限公司,湖南株洲412000

出　　处：《金属热处理》2021年第9期153-158,共6页Heat Treatment of Metals

摘　　要：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近,此方法在保证渗氮速度的同时,能有效控制32Cr3MoVE钢渗氮后的白亮层深度及抑制脆性相的生成;最后通过工艺试验加以验证,得出适合32Cr3MoVE钢的氮势门槛值控制的气体渗氮热处理工艺。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.

关 键 词：32Cr3MoVE钢 气体渗氮 白亮层 氮势门槛值 

分 类 号：TG156[金属学及工艺—热处理]