短应力线轧机拉杆离子渗氮畸变控制  

Distortion control of pull rod of short-stress line rolling mill in ion nitriding

作　　者：孙华雨[1] 赵玉霞[1] 李双喜 Sun Huayu;Zhao Yuxia;Li Shuangxi(Henan Mechanical and Electrical Vocational College,Zhengzhou Henan 451191,China)

机构地区：[1]河南机电职业学院,河南郑州451191

出　　处：《金属热处理》2022年第10期283-287,共5页Heat Treatment of Metals

摘　　要：为探明杆状工件离子渗氮畸变的影响因素,对短应力线轧机拉杆的加工残余应力、装卡方式、多次升温和降温等因素进行了研究。结果发现,影响拉杆渗氮畸变的最大因素是拉杆的加工应力,所以对于长杆状工件,在精加工和渗氮之前加入合理的去应力工序可以有效控制渗氮畸变;另外,缓慢升温、降温及垂直悬吊的装卡方式也可以在一定程度上减小渗氮畸变。需多次渗氮才能满足图纸技术要求的长杆状工件,在每渗氮一次之后,把工件旋转180°,可以有效控制渗氮畸变。Influence of various factors including the processing residual stress of the short-stress line rolling mill, the method of mounting, multiple heating and cooling on the distortion of rod-shaped workpieces caused by ion nitriding was investigated. The results show that the most important factor affecting the nitriding distortion is the processing stress of the pull rod, so for long rod-shaped workpieces, a reasonable stress relief process before finishing and nitriding can effectively control the nitriding distortion. In addition, slower heating, cooling and vertical suspension clamping methods can also reduce nitriding distortion. For long rod-shaped workpieces which requires multiple nitriding to meet the technical requirements of the drawings, rotating the workpiece by 180° after each nitriding can effectively control the nitriding distortion.

关 键 词：离子渗氮 渗氮畸变 畸变控制 

分 类 号：TG156.82[金属学及工艺—热处理]