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通过向高铬铸铁铁水中插入不锈钢棒以改变铁水凝固的温度场,利用ANSYS软件模拟了高铬铸铁凝固过程中的温度场,获得了温度场的变化规律以及温度场的分布特征,分析了温度场的变化对高铬铸铁凝固组织的影响。结果表明,铁水开始凝固时温度场变化对凝固组织有重要的影响。在高铬铸铁铁水和不锈钢棒交界处,凝固初期温度场变化最大,凝固组织最为细小;在坩埚壁与不锈钢棒之间的中部铁水区域,凝固初期的温度场变化平缓,凝固组织最粗大。凝固初期温度场的模拟结果对铸件凝固组织特征具有较好的预测作用。
The temperature field during the solidification of high chromium cast iron was simulated by ANSYS software by inserting stainless steel rods into the hot metal of high chromium cast iron and the temperature field was obtained. Effect of Field Variation on the Solidification Structure of High Chromium Cast Iron. The results show that the change of temperature field on the solidification of hot metal has an important influence on the solidified structure. At the junction of high chrome cast iron hot metal and stainless steel bar, the temperature field has the largest change at the initial stage of solidification and the solidified microstructure is the smallest. In the middle hot metal area between the crucible wall and the stainless steel bar, the temperature field at the initial stage of solidification changes gently and the solidified structure is the most coarse. The simulation results of temperature field at the initial stage of solidification have a good prediction effect on the solidified microstructure of castings.