基于数值模拟技术的大直径磨球热处理工艺优化

Optimization of Heat Treatment Process for Large Diameter Grinding Ball Based on Numerical Simulation Technology

为了解决等温淬火过程中生产周期长、能耗大、淬火介质污染环境等问题,提出了一种新型热处理工艺,以得到贝氏体-马氏体复相组织。运用ANSYS软件对实际工件在淬火过程中的温度场进行了模拟,并结合C曲线优选出理想的工艺参数。利用热电偶深孔安装法验证了模拟温度场的准确性。通过优化后的热处理工艺参数对ф150 mm大直径磨球进行了反复水冷空冷,得到由心部到表面的硬度和组织含量,结果说明模拟是准确的。

In order to solve the problems of long production cycle, high energy consumption and quenching medium environment pollution in the process of isothermal quenching, a new type of heat treatment process was put forward to obtain bainite-martensite duplex microstructure. The temperature field of the actual workpiece during quenching process was simulated by using ANSYS software. The ideal technological parameters were optimized combined with C curve. The accuracy of the simulated temperature field was verified by the method of deep hole installation of thermocouples. Repeated water cooling and air cooling for φ 150 mm large diameter grinding ball was carried out by optimized heat treatment process parameters, and the hardness and microstructure contents from the heart to the surface were obtained. The results illustrate that the simulation is accurate.