热连轧机组轧辊温度场及热辊型

doi:10.13228/j.boyuan.issn0449-749x.20230412

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Abstract Aiming at the problems of roll consumption and shape caused by the inability to accurately predict the roll temperature field of a hot continuous mill. In order to realize the accurate measurement of the temperature field of the roll and the shape of the hot roll, reduce the abnormal consumption of the roll and avoid the occurrence of major production accidents, a numerical finite difference method and roll heat conduction equation were used to establish a model suitable for the roll temperature field and hot roll profile of a hot rolling mill. Based on this model, the roll cooling water intelligent segmental cooling control system of the hot rolling mill is introduced above, fully considering the existence of the specific parameters of the cooling water in the complex state of the cooling water and the direct influence of the cooling water flow rate on the roll temperature field and the hot roll crown. Considering the equipment parameters and process characteristics in the rolling process of hot tandem rolling, and considering the cyclic superposition effect of the increasing number of rolled steel coils on the roll temperature field and hot roll profile, the program is written to combine the theoretical calculation formula, simulation control model and field practice. The combination of process equipment parameters is the research object of analysis. Firstly, the on-site roll temperature measurement equipment is used to measure the temperature of the work roll and the backup roll, and the measured actual temperature distribution value is compared with the calculated value of the model, and the similar roll temperature and roll crown change trend as well as the consistent temperature and crown are obtained. The degree value verifies the accuracy and validity of the model calculation. Subsequently, the influence of changes in the number of steel coils on the roll temperature and roll crown was obtained by means of research and analysis based on the results, found the superimposed effect of the increase in the number of steel coils on the temperature rise, and found that about 10 coils will complete the temperature rise of the roll temperature field, and at the same time analyzed the cooling water roll temperature distribution along the roll body direction at three different flow rates. Finally, the accurate prediction of the temperature field of the work roll and the backup roll and the shape of the hot roll is obtained, and it lays a model foundation for further regulating roll temperature distribution by using roll temperature field and hot roll model.

Key words： hot rolling temperature field thermal profile finite difference method cooling water

Received: 17 July 2023

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	Articles by authors
	LI Zizheng
	LIU Luxuan
	YIN Baoliang
	KUANG Shuang
	WANG Jianhui
	BAI Zhenhua

Cite this article:

LI Zizheng,LIU Luxuan,YIN Baoliang等. Research on roll temperature field and hot roll crown of hot continuous rolling mills[J]. Iron and Steel, 2024, 59(2): 111-118.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20230412 OR http://www.chinamet.cn/Jweb_gt/EN/Y2024/V59/I2/111

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