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Effect of SiO2 mould thickness on conductive heat flux during cooling process of fused AZS material
Author(s): 
Pages: 341-344
Year: Issue:  5
Journal: Refractories

Keyword:  fused AZS materialcooling process simulationthickness of silica mouldconductive heat flux;
Abstract: 为选择合适的砂型厚度,提高铸件成品率,利用COMSOL Multiphysics软件模拟了33#锆刚玉熔体的冷却过程,分析了SiO2砂型厚度(分别为30、40、50 mm)对冷却过程中铸件传导热通量分布和变化的影响.结果表明:1)SiO2砂型热导率小,不利于铸件表面的快速冷却;铸件中心截面上角部热通量大,冷却速度大,中心附近区域热通量小,冷却速度小.2)砂型厚度增加,铸件的最大热通量减小,冷却速度减小,而最大热通量的面积增大,有利于减小不同部位冷却速度差别;但厚度继续增加不能显著改善冷却速度不均现象,反而导致砂型工段成本增加和劳动强度显著增大,因此砂型厚度以40 mm为宜.
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