45钢光轴连续感应淬火过程的数值模拟

Numerical simulation of continuous induction quenching process of 45 steel plain shafts

建立45钢无限长轴对称工件连续感应淬火过程的二维物理模型,并进行温度场的数值模拟。根据连续感应淬火过程中温度场的分布给出了判断淬硬层深度的依据,并结合Maynier组织预测模型与硬度公式计算出工件不同深度处的硬度值进行验证。结果表明,可根据工件感应加热区域进入喷水冷却时刻的径向温度分布曲线来预测连续感应淬火最终淬硬层深度。根据这一结论,可以用所建立的有限元模型对连续感应淬火工件淬硬层深度进行预测。

Two dimensional physical model of continuous induction quenching process of the 45 steel axisymmetric workpiece was built to simulate the temperature field. According to the distribution of the temperature field during the process was given to judge the depth of hardened layer. The Maynier microstructure model and the prediction formula of hardness calculated at different depths of the hardness of the workpiece were verified.The results show that we can predict the depth of the final hardened layer of the continuous induction hardening through the radial temperature distribution curve of the induction heating zone when the part alters into the cooling stage. According to the conclusion,the finite element model can be used to predict the depth of the hardened layer of the workpiece in the actual continuous induction quenching process.