陈临夏
,
向顺华
,
刘华飞
,
陈亮
机械工程材料
分析了单个钛带卷在真空炉内退火的传热过程，通过热传导反问题的求解，确定了钛带卷径向等效导热系数；采用Ansys有限元软件对钛带卷退火过程的温度场进行了数值模拟，并对实际温度进行测量。结果表明：在退火开始阶段，钛带卷内外温差较大，最高达310℃；分阶段加热方式和风机强制氩气循环缓和了钛带卷内外层温差；退火30h后，钛带卷温度稳定在700℃，内外温差只有6℃；模拟结果与实测结果吻合较好，证明了模型的可靠性。
关键词:
钛带卷
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温度场
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数值模拟
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径向等效导热系数
M.Y. Gu
,
G. Chen
,
M.C. Zhang
,
X.C. Dai
金属学报(英文版)
The mathematical model has been established for the simulation of steel coil's heat transfer during annealing thermal process in HPH (high performance hydrogen) furnace. The equivalent radial thermal conductivity is adopted by statistical analysis regression approach through the combination of a large quantity of production data collected in practice and theoretical analyses. The effect of the number of coils on circulating flow gas is considered for calculating the convection heat transfer coefficient. The temperature within the coil is predicted with the developed model during the anneling cycle including heating process and cooling process. The good consistency between the predicted results and the experimental data has demonstrated that the mathematical model established and the parameters identified by this paper are scientifically feasible and the effective method of calculation for coil equivalent radial heat transfer coefficient and circulating gas folw has been identified successfully, which largely enhances the operability and feasibility of the mathematic model. This model provides a theoretical basis and an effective means to conduct studies on the impact that foresaid factors may imposed on the steel coil＇s temperature field, to analyze the stress within coils, to realize online control and optimal production and to increase facility output by increasing heating an cooling tates of coils without producing higher thermal stress.
关键词:
HPH furnace
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