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为了加强钢板生产过程中氢的控制,建立了钢板内部氢扩散的数学模型,分析了钢板芯部的氢质量分数与扩散系数、钢板的厚度、氢的初始质量分数和时间之间的关系。随着钢板的厚度增加,氢的扩散效果大幅度降低;随着钢板缓冷开始温度的降低,同一厚度钢板芯部氢的扩散效果也越来越差。采用高温堆垛缓冷或采用保温坑缓冷等工艺可实现高温扩氢,从而避免轧后钢板的氢致缺陷。
In order to strengthen the control of hydrogen in the process of steel production, a mathematical model of hydrogen diffusion inside the steel plate is established. The relationship between hydrogen mass fraction and diffusion coefficient, thickness of steel plate, initial hydrogen content and time is analyzed. With the increase of the thickness of the steel sheet, the diffusion effect of hydrogen is greatly reduced. With the decrease of the start temperature of the steel sheet slowly, the hydrogen diffusion effect of the steel sheet with the same thickness becomes worse and worse. The use of high-temperature stacking slow cooling or cold pit annealing process can be used to achieve high-temperature hydrogen expansion, so as to avoid hydrogen-induced plate defects after rolling.