Formation mechanism of U-shape or kyphosis in medium plate cooling
Based on the analysis of industrial production data for four component steel grades,and uses metallo-graphic analysis and simulation calculations to elucidate the mechanism of U-shape and kyphosis formation during plate cooling.The generation of U-shape is dominated by the difference of thermal expansion between the upper and lower surfaces,and at this time,the cooling rate of the upper surface is greater than that of the lower surface.The kyphosis is dominated by the difference of phase transformation expansion between the upper and lower surfaces,and at this time,the significant phase transformation expansion of the upper surface leads to the appearance of cool-ing kyphosis.Increasing the cooling water volume on the lower surface has been proposed,and industrial production has shown that this measure can significantly improve the flatness of the cooling plate in the medium plate.
medium plateU-shapekyphosisthermal expansionphase transformation expansion
NETL
NSTL
万方数据
