利用磨削热对工件表面热处理的研究

Study on Heat Treatment of Workpiece Surface by Grinding Heat

本文研究讨论能否利用磨削热对非淬硬钢进行表面热处理,即同时实现磨削加工与表面淬火两个工艺,既提高生产效率,又降低生产成本。选取齿条成形加工作为研究对象,综合考虑材料的热物性参数、对流换热、相变潜热等因素,通过数值仿真方式,计算加工过程中工件温度场分布情况。根据金属相变理论,推断出工件淬硬层深度。设计齿条成形磨削实验,对加工后的工件表面淬硬层深度进行测量,与计算结果具有较好的一致性,证明温度场仿真模型与淬硬层推断方法的正确性,同时验证了利用磨削热对工件表面进行热处理的可行性。

This paper discusses whether the surface heat treatment of non-hardened steel can be achieved by grinding heat, that is, both the grinding and surface hardening process can improve the production efficiency and reduce the production cost. The results show that the temperature field distribution of the workpiece during the machining process is calculated by means of numerical simulation, considering the thermophysical parameters of the material, convective heat transfer and latent heat of phase change. According to the theory of metal transformation, the depth of hardened layer is deduced. The results show that the temperature field simulation model and the hardened layer inference method are correct, and it is proved that the use of the hardened layer in the surface of the workpiece after the hardened layer depth is measured, and the results are in good agreement with the calculated results. The feasibility of heat treatment on the surface of the workpiece by grinding heat.