Subsection cooling system of hot rolling silicon steel and its industrial application  

作　　者：Qiu-na Wang Ji-quan Sun Li-po Yang Hai-shen Wang Li-jie Dong Jie-ming Li Zhen-yang Zhi Yan-wen Bi 

机构地区：[1]National Engineering Research Center of Flat Rolling Equipment,University of Science and Technology Beijing,Beijing,100083,China [2]Hot Rolling Department of Qian’an Iron and Steel Corporation,Shougang Company Limited,Tangshan,064404,Hebei,China [3]National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,Yanshan University,Qinhuangdao,066004,Hebei,China

出　　处：《Journal of Iron and Steel Research International》2025年第1期159-170,共12页钢铁研究学报(英文版)

基　　金：supported by Returned Overseas Scholar Foundation of Hebei Province(Grant No.C20210321);Natural Science Foundation of Hebei Province(Grant No.E2021203106);S&T Program of Hebei(Grant No.236Z1019G)。

摘　　要：An online subsection cooling method for hot rolling silicon steel was designed to achieve local adjustment of transverse roll gap.Particularly,it was able to meet the requirements of edge drop of the strip by using the features of online thermal crown.First,after the new subsection spray beam was installed at the exit of mill,the special local cooling rules were analyzed for altering the thermal crown of roll according to rolling process parameters.Meanwhile,the dynamic impact of subsection cooling on the local thermal crown could just be obtained according to the measured data.Obviously,the heat transfer coefficient was determined by different subsection cooling curves under varied rolling conditions.Secondly,the rolling rhythm and variable conditions were important dynamic factors of transient roll temperature in practical rolling process.Therefore,real-time calculation and presetting of the thermal crown were carried out to maximize special requirements of load roll gap on local strip crown.By this new method,the transient temperature and the thermal crown of roll could be quantitatively controlled online.And the practical results showed that the predicted temperature was able to match the measured value by more than 95%.Meanwhile,the adjustable range of thermal crown increased by more than 2.5 times.Finally,the qualification rate of strip edge crown has increased from the original 30%to over 70%.

关 键 词：Subsection cooling Thermal roll crown Multi-parameter coupling Hot rolling Silicon steel 

分 类 号：TG1[金属学及工艺—金属学]