The relationships between stock recalescence time/distance and process variables, such as exit thickness, reduction, rolling speed, work roll diameter and slab–roll heat transfer coefficient during hot strip rolling, have been established. The behaviour of the temperature gradient was analysed and used to estimate the slab and transfer bar mean temperatures from measured surface temperature in three hot strip mills located in northeast México. It was found that the recalescence critical variables, in order of importance in minimising temperature measurement variation, are slab–roll heat transfer coefficient, reduction, exit thickness and roll speed.
Get full access to this article
View all access options for this article.
References
1.
MéndezG. M.LeducL. A.: ‘Hot strip mill temperature prediction using intelligence systems’, Hylsa SA de CV internal communication and Dr.Ing. thesis development, Monterrey, Mexico, 2002.
2.
HardingR. A.: ‘Temperature and structural changes during hot rolling’, PhD thesis, University of Sheffield, Sheffield, UK, 1976.
3.
HolmanJ. P.: ‘Heat transfer’; 1995, DF, Mexico, McGraw Hill Book Company, Inc.
4.
ColasR.: ‘Modelling heat transfer during hot rolling of steel strip’, Model. Simul. Mater. Sci. Eng., 1995, 3, 437–453.
5.
ZambranoP. C.DelgadoA. L.GeuerreroM. P.ColasR.LeducL. A.: ‘Hot rolling of light gauge steel strip’, ISIJ Int., 2003, 43, (7), 1030–1035.
6.
LeducL. A.: ‘Hot rolling of titanium bearing steels’, PhD thesis, University of Sheffield, Sheffield, UK, 1980.
7.
MetalsGE: ‘GE models user reference manuals’, 1, Roanoke, VA, USA, 1994.
