Hot strip steel
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Before entering the mill, the scale layer is once again removed. Once the head-end is firmly gripped and friction and tension prevent the wraps of steel from slipping relative to the mandrel, the wrapper rolls disengage from the growing coil of steel. The last four to five roughing mills each incorporate edgers for width control. The reheating furnace has usually two extractors. The loopers arranged between the finishing stands of the HSM safeguard correct mass flow control and hence contribute to the stable rolling of finished strip down to the final thickness of the strip. Another rolling system goes even farther and uses one four-high reversing rougher and one four-high reversing finishing mill, with hot-coiling boxes in front and in back of the finishing mill.
Tata Steel invest £14m in new part for hot strip mill - BBC News
To improve control further, many shops use hydraulic roll bending, or they use a differential cooling of the rolls to change their shape by thermal expansion. In this paper, the above effect is quantified and conclusions concerning the applicability of the fracture mechanics parameters and approaches to the estimation of the residual fatigue life of structures are discussed. Indeed, some plants move one continuous strip from the pickle line to the temper-mill exit, with cold-rolling and annealing in between. Normally, the rolling program of a hot-strip mill is influenced by roll wear. The principles of gage control are discussed. For assistance or to subscribe, please contact us:.
The material is either used by customers directly or further processed at ThyssenKrupp Steel Europe. The investments will help the steel producer strengthen its position as technology leader for premium flat-rolled carbon steel products. Because each pass reduces the slab by only about 50 millimetres, it may take 21 passes, including several edge passes with the slab standing upright on its edges, to obtain a slab measuring 0. By British steel output was less than that of either the United States or Germany, while the British textile industry was declining sharply. During the roughing operation, iron scales from back on the surface of the steel. Plant maintenance and management.