渗氮是广泛应用的一种低温化学热处理工艺。渗氮处理除了能赋予工件许多优越的使用性能外,还有一个众所周知的优点,就是渗氮过程温度低,钢的基体不产生相变,因此渗氮变形一般很小,可作为最终处理工序。但是,随着渗氮工艺的应用范围不断扩大,人们开始认识到对于薄形件、细杆件和截面形状不对称的工件,渗氮仍要产生不同程度的变形,当工艺操作不当或措施不力时,往往难以满足渗氮件的精度要求,以致不得不进行返修,甚至造成报废。 本文较全面地分析了渗氮产生变形的原因、影响渗氮变形的因素及其一般规律,并结合例证介绍了控制和防止渗氮件变形的方法。 Nitriding is a widely used low-temperature chemical heat treatment process. In addition to nitriding to give the workpiece a number of excellent performance, there is a well-known merit is nitriding temperature is low, the steel matrix does not produce phase change, nitriding deformation is generally very small, can be used as the final treatment process. However, as the application of nitriding technology continues to expand, people are beginning to realize that for thin parts, thin rods and workpieces with asymmetric cross-sectional shapes, nitriding still has to be deformed to different extents. When improper operation or inadequate measures are taken When it is often difficult to meet the requirements of the accuracy of nitriding pieces that had to be repaired or even scrapped. In this paper, the causes of nitriding deformation, the factors that affect the nitriding deformation and its general rules are analyzed in a comprehensive way. The methods of controlling and preventing the deformation of nitriding parts are introduced with examples.