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Abstract：
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The generation mechanism and change process of internal stress for strip steel after rolling in the cooling were analyzed by finite element simulation software ABAQUS，and the edge wave of hot rolling strip steel after cooling was caused by the uneven transverse cooling rate and transverse temperature distribution. Then, the influences of ultra-fast cooling nozzles, U-shaped layered cooling headers and side spray water on the transverse temperature distribution of strip steel were analyzed. The results show that the nozzle of cooling header has been in a high temperature environment for a long time, which leads to the problems of corrosion, aging,deformation and blockage for nozzle. At the same time, the difference in the flow of layered cold water along the width direction of strip steel results in uneven transverse temperature distribution of strip steel. In addition, the blowing ability of side spray is related to the angle of side spray, the wear amount of side spray nozzle, the pressure of side spray, etc. If the side spray is not clean, the residual cooling water on the upper surface of strip steel accumulates to cause uneven cooling of strip steel along the width direction. Thus, the uniformity of strip steel cooling in the layered cooling zone is enhanced by optimizing the uniformity of the flow distribution for the cooling header，adjusting the angle of the side spray nozzle and optimizing the effect of side spray.
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Funds：
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唐山市科技计划项目（20140210C）
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AuthorIntro：
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作者简介：陈彤(1990-)，男，学士，工程师，E-mail：438324722@qq.com
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Reference：
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