增速器18CrMnTi钢大齿轮外形如图1所示,主要尺寸数据见表1。要求齿部渗碳层深1.2～1.6mm,表面硬度HRC56±2。齿轮在渗碳及淬火过程中,因热应力和组织应力的综合作用,以及在高温自重的影响下发生变形。其尺寸变化主要是淬火过程中发生的,表现为外径和公法线胀大,随着淬火温度的升高和淬硬层深度的加深,外径、公法线、椭圆度、锥度、螺旋角改变更 Gearbox 18CrMnTi steel gear shape shown in Figure 1, the main dimensions of the data in Table 1. Dental carburizing layer requires deep 1.2 ~ 1.6mm, surface hardness HRC56 ± 2. Gear in the carburizing and quenching process, due to the combined effect of thermal stress and stress, as well as deformation under the influence of high temperature and weight. The dimensional changes occurred mainly in the quenching process, the performance of the outer diameter and the expansion of public law, with the quenching temperature and hardened layer depth deepening, OD, common normal, ovality, taper, helical angle change more