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采用一维应力和热弹性材料的梁式模型,对控制冷却过程中钢板的翘曲进行了分析。为了验证这种分析的可靠性,用新设计的实验装置做了试验。在水冷过程中,测定了温度与翘曲的连续变化。(1)通过与试验结果的比较,定量地验证了这种分析的可靠性,预计这种计算方法将被用于控制冷却过程中钢板翘曲的控制。(2)由此分析结果可以得出:引起翘曲的主要因素是相变、屈服应力和导热性。a)在低温相变条件下,冷却期间的翘曲和残余翘曲都大,这是因为低温时相变膨胀大,屈服应力也高。b)屈服应力高翘曲大。c)导热系数大,钢板厚度方向温度梯度就大,从而会造成比较大的热应力和较大的翘曲。
The one-dimensional beam and thermo-elastic beam model was used to analyze the warpage of the steel during the control of the cooling process. In order to verify the reliability of this analysis, a new design of the experimental device was tested. In the water cooling process, the continuous changes in temperature and warpage were measured. (1) The reliability of this analysis is quantitatively verified through comparison with the experimental results. It is expected that this calculation method will be used to control the warpage of the steel plate during cooling. (2) From this analysis, it can be concluded that the main factors causing warpage are phase transition, yield stress and thermal conductivity. a) Under low temperature phase change conditions, warpage and residual warpage during cooling are both large because of large phase change expansion and low yield stress at low temperatures. b) high yield stress high warpage. c) large thermal conductivity, the temperature gradient in the direction of the thickness of the steel plate is large, which will cause greater thermal stress and greater warpage.