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针对以Fe粉和Al2O3粉为原材料的两相复合磁性磨粒这一研究对象,建立了磁性磨粒热压烧结过程的传热模型,通过计算机模拟方法对模具温度场进行分析,从而优化热压工艺。模拟结果表明:炉体的升温速率对模具的温度场影响较大,同时磨粒在模具中的位置不同其温度场分布也不同。综合磨粒的制备效率和实验设备的要求,本实验条件下应采用在低温区为10～15℃/min、高温区为5～10℃/min的升温速率,并将磨粒置于模具中的z5区域,以降低热压成形过程中磨粒的轴向温差,改善磨粒的物理力学性能。
Aimed at the research object of two-phase composite magnetic abrasive grains with Fe powder and Al2O3 powder as raw materials, the heat transfer model of magnetic abrasive grains during hot-pressing sintering process was established. The temperature field of mold was analyzed by computer simulation to optimize hot pressing Process. The simulation results show that the heating rate of the furnace has a great influence on the temperature field of the mold, and the temperature field distribution of the abrasive grains in the mold is different at the same time. Synthetic abrasive preparation efficiency and requirements of experimental equipment, the experimental conditions should be used in the low temperature zone of 10 ~ 15 ℃ / min, high temperature zone of 5 ~ 10 ℃ / min heating rate, and the abrasive particles placed in the mold Of z5 area, in order to reduce the axial temperature difference during the hot forming process, to improve the physical and mechanical properties of the abrasive.