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采用埋偶法测量了辊底式退火炉内钢管的温度,验证了实际退火曲线合理性。基于单点测温、常热流假设及任意未来时间步长的导热反问题算法求解了钢管退火过程的外表面热流密度;并得到了总括热吸收系数。结果表明:钢管外表面热流密度与钢管外壁温度呈抛物线关系,总括热吸收系数随管壁温度的0.578次幂增长。
The temperature of the steel tube in the roller hearth annealing furnace was measured by the buried dual method, which verified the rationality of the actual annealing curve. Based on the single-point temperature measurement, the assumption of constant heat flow and the thermal inverse problem algorithm of any time step in the future, the heat flux density of the outer surface of the steel tube during annealing was obtained. The thermal absorption coefficient was obtained. The results show that the heat flux density on the outer surface of the steel pipe is parabolic with the temperature of the outer wall of the steel pipe, and the total heat absorption coefficient increases with the 0.578 power of the pipe wall temperature.