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采用多层平板模型,利用有限元分析软件计算了不同涂层结构下梯度涂层高炉风口的温度场与应力场,并分析了涂层结构对梯度涂层内部温度分布与应力分布的影响。结果表明,涂层结构变化可以影响涂层内温度与应力的大小及转折点的位置。试验中设计的梯度涂层具有良好的隔热性能,且涂层内应力变化缓慢。当底层、中间层及面层厚度比为1∶1∶3时,涂层隔热效果最好,隔热温度达77℃;底层、中间层及面层厚度比为1∶2∶2时,涂层最大等效应力最小,其值为1.52E+9Pa。
The temperature field and stress field of the graded blast furnace tuyere with different coating structures were calculated by the multi-layer flat model and the influence of the coating structure on the temperature distribution and the stress distribution in the graded coating was analyzed by finite element analysis software. The results show that the change of the coating structure can affect the temperature and the stress in the coating and the location of the turning point. The gradient coating designed in the experiment has good thermal insulation properties, and the stress in the coating changes slowly. When the thickness ratio of the bottom layer, the middle layer and the surface layer is 1: 1: 3, the thermal insulation effect of the coating is the best, the temperature of the insulation is 77 ℃. When the thickness ratio of the bottom layer, the middle layer and the surface layer is 1: 2: 2, The maximum equivalent stress of the coating is the smallest, its value is 1.52E + 9Pa.