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Deviation Prevention Ability of Rollers in continuous annealing furnace and Application

Journal of Iron and Steel Research(International) 2012年第12期19卷 8-13页

作者： ZHANG Yan YANG Quan HE An-rui YAO Xi-jiang GUO De-fu National Engineering Research Center of Advanced Rolling University of Science andTechnology Beijing Beijing 100083 China

In order to reduce the strip deviation in the practical production procedure in the continuous annealing fur- nace, a dynamic simulation model was built through finite element method （FEM） to conduct the quantification cal- culation of the effect of regular roller contour types on strip deviation. The result reveals that comparing to the flat roller, forward roller contour can prevent the strip deviation to some degree. In terms of prevention ability, double- taper roller is the strongest, single-taper roller and crown roller are less stronger; and more roller contour values raise the prevention ability. Accordingly, optimization method was applied to continuous annealing furnace, and it largely reduced accidents such as strip break and limited speed that are caused by the deviation.

关键词： strip deviation continuous annealing furnace dynamic simulation roller contour

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Strategy Research on Force Setting of Strip-switching Process in continuous annealing furnace

Strategy Research on Force Setting of Strip-switching Proces...

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第24届中国控制与决策会议

作者： XING Yi-ding 1 , WEN Zhi 1,2 , DOU Rui-feng 1* , LI Zhi 3 , FENG Xiao-hong 3 ,DONG Bin 3 1. University of Science and Technology Beijing, Beijing 1000832. Beijing Key Laboratory of Energy Saving and Emission Reduction for Metallurgical Industry, Beijing 1000833. CISDI Industrial furnace, Chongqing 400013

This paper analysis the force between strip and roll in continuous annealing furnace at first, and make the research on the force setting of the strip-switching process after. Through the study, it indicates that the force setting is not that easily changing one force value to another. This adjustment is limited by both sides of the strip tension to avoid the slipping between the strip and roll. To solve this problem, the switching strategy which limits the difference between two adjacent setting forces is proposed.

关键词： continuous annealing furnace Strip-switching Force setting Strategy

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Cause analysis of and solution to furnace roller pick-up in the high strength automotive steel sheet processing line

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Baosteel Technical Research 2013年第2期7卷 44-48页

作者： WANG Lu Baosteel-NSC Automotive Steel Sheets Co. Ltd.

Cold-rolled high strength steel sheets for automobiles contain more Mn and Si based alloy elements, which, under the reducing atmosphere in the annealing furnace, will get enriched on the strip surface. Since the furnace rollers and the strips contact frequently, alloy elements on the roller surface will form hard protuberance. We call this protuberance ＂pick-up＂. In addition, with the increase of the amount of dust in the furnace atmosphere, the occurrence of furnace roller pick-up will also increase. Through chemical reaction and physical accumulation analysis combined with practical experience, the causes of pick-up in different furnace sections were analyzed. Methods of preventing furnace roller pick-up in the high strength steel sheet processing line were discussed and solutions to improving the strip surface quality in the continous annealing furnace were provided.

关键词： high strength steel continuous annealing furnace roller pick-up furnace atmosphere cleanliness

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Detection and analysis of gas tightness of continuous annealing furnaces

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Baosteel Technical Research 2008年第1期2卷 41-45页

作者： Hu Guangkui Song Ruhua Cold Rolling Plant Baosteel Branch Baoshan Iron ＆Steel Co. Ltd. Shanghai 200941 China

When a cold rolled strip is being treated in a continuous annealing furnace which is full of protective gas, the gas tightness of the furnace body, the connected facilities and the gas channels become an important indicator that directly affects the product＇s surface quality and shows the technical level of the design, the manufacture and the installation. By considering the problems of the gas tightness of a vertical annealing furnace in the installation and maintenance, this thesis evaluates the gas tightness indicator and gas tightness related level of the furnace body and the circulation duct, while studying and analyzing the technologies of negative-pressure leak detection and sealing.

关键词： continuous annealing furnace gas tightness leak detection

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