【摘要】 针对罩式退火过程中钢卷温度分布不均问题，本研究通过建立三维全局热场仿真模型，系统分析各退火阶段的温度场演化规律，揭示了上下钢卷因热源差异形成“外高内低”及轴向梯度分布的原因。在对比的三种优化方案中，延长高温均热阶段对温度均匀性改善效果有限（最大温差仅降4～5℃）；延长低温均热阶段对上钢卷温度均匀性改善效果显著（温差降69.4%）；分段调控进气温度可以有效解决温度不均问题，可使上下钢卷最大温差分别降低72.2%与73.7%。更多还原

【Abstract】 Aiming at the problem of non-uniform temperature distribution in steel coils during belltype annealing, this study establishes a three-dimensional global thermal field simulation model to systematically analyze the evolution law of the temperature field in each annealing stage, and reveals the reasons for the formation of "outer-high and inner-low" and axial gradient distribution in the upper and lower steel coils due to differences in heat sources. Among the three compared optimization schemes, extending the high-temperature holding stage has a limited effect on improving temperature uniformity(the maximum temperature difference only decreases by 4-5 ℃); extending the low-temperature holding stage significantly improves the temperature uniformity of the upper steel coil(the temperature difference decreases by 69.4%); and segmented control of the inlet gas temperature can effectively solve the problem of temperature non-uniformity, reducing the maximum temperature differences of the upper and lower steel coils by 72.2% and 73.7%, respectively.更多还原