本文通过介绍株齿公司北奔内齿圈渗碳淬火工艺的开发与应用。从齿轮的原材料、预先处理、渗碳淬火工艺3方面分析了内齿圈热处理变形的原因,并采取了下列有效措施:控制原材料端淬值、采用等温正火、优化渗碳工艺、提高淬火冷却均匀性、淬火后校外圆再回火。 In this paper, we introduce the development and application of carburizing and quenching technology of Beitou internal tooth ring of company. The reason of heat treatment deformation of ring gear is analyzed from the aspects of gear raw material, pre-treatment and carburizing quenching process. The following effective measures are taken: controlling end quenching value of raw material, isothermal normalizing, optimizing carburizing process, increasing quench cooling Uniformity, after quenching the outer cylinder and then tempering.