炉压对齿轮离子渗氮的影响  

Effect of furnace pressure on ion nitriding of gear

作　　者：李双喜 沈亚秋 白小波 高洁[1] 陈琳 Li Shuangxi;Shen Yaqiu;Bai Xiaobo;Gao Jie;Chen Lin(Henan Electromechanical Vocational College,Xinzheng Henan 451191,China;Xinyang Branch,Beijing Shouhang Science-technology Development Company,Xinyang Henan 464000,China;China Railway Engineering Equipment Group Co.,Ltd.,Zhengzhou Henan 450016,China)

机构地区：[1]河南机电职业学院,河南新郑451191 [2]北京首航科学技术开发有限公司信阳分公司,河南信阳464000 [3]中铁工程装备集团有限公司,河南郑州450016

出　　处：《金属热处理》2024年第6期129-134,共6页Heat Treatment of Metals

基　　金：河南省科技攻关项目(222102220029)。

摘　　要：向离子渗氮炉内通入氨气和氩气,保持氨气流量为0.5 L/min,通过改变氩气流量来控制炉压(氩气流量分别为0、0.45、0.60、0.85 L/min),研究炉压对小模数齿轮渗氮层均匀性和渗氮层组织的影响。结果表明,离子渗氮层均匀性随着氩气通入量的增加而增加;在540℃×8 h离子渗氮工艺下,当炉压低于180 Pa时,轮齿齿根处无法渗氮;当炉压高于330 Pa时,炉内由于辉光厚度太薄,打弧几率增加,炉温均匀性变差。随着氩气通入量的增加,化合物层厚度减少,并在一定程度上提高渗氮速率,而对渗层疏松和脉状氮化物级别无明显影响。Inject ammonia and argon into the ion nitriding furnace,the ammonia flow rate of 0.5 L/min was maintained,and the furnace pressure was controlled by changing the argon flow rate(argon flow rates of 0,0.45,0.60 and 0.85 L/min,respectively)to study the effect of furnace pressure on the uniformity and microstructure of the nitrided layer of small modulus gears.The results show that as the argon gas flow rate increases,the uniformity of the ion nitrided layer also increases.Under an ion nitriding process at 540℃for 8 h,when the furnace pressure is below 180 Pa,nitrogen cannot penetrate into the root area of gear teeth.When the furnace pressure is higher than 330 Pa,due to the thin glow thickness inside the furnace,the probability of arcing increases and the uniformity of furnace temperature deteriorates.With the increase of argon gas input,the thickness of the compound layer decreases and to some extent improves the nitriding rate,but has no significant effect on the looseness of the nitriding layer and the level of vein like nitrides.

关 键 词：离子渗氮 齿轮 辉光厚度 炉压 

分 类 号：TG156.95[金属学及工艺—热处理]