Edge heating apparatus for preventing cracking of edges of band steel, and method thereof

Abstract

The invention discloses an edge heating apparatus for preventing cracking of edges of band steel, and a method thereof. The apparatus comprises a base support, a moving mechanism, a heating mechanism and a PLC; the base support is arranged at one side of an uncoiler; the moving mechanism is arranged on the upper end surface of the base support, and the moving mechanism comprises a vertical bracket, vertical drivers, transverse brackets, transverse guide rails and a transverse driver; the heating mechanism is fixedly arranged on the transverse guide rails, and the heating mechanism comprises an igniting electrode, a combustion chamber, a nozzle plate, a nozzle, an air and gas mixing tube and an air and gas mixer; and the PLC is respectively connected with the vertical drivers, the transverse driver and the igniting electrode. The edges of the band steel can be heated to an assigned temperature through the method by using the apparatus to eliminate a temperature difference of the strip steel in the width direction in order to effectively eliminate cracking of the edges in the uncoiling process of steel coils.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to an edge heating device and method for preventing edge cracking of strip steel. Background technique [0002] During the rolling process of the steel strip, the temperature drop at the edge is greater than that in the middle, and the temperature difference between the edge and the middle is about 100°C. The large temperature drop at the edge will lead to uneven grain structure on the cross-section of the strip and large performance differences. At the same time, it will also cause edge cracks during rolling and severe uneven wear on the roll. [0003] Heating the edge of the strip can effectively reduce and prevent the occurrence of the above problems. Edge heating is generally used for hot rolling intermediate slabs, which can increase the temperature of the edge of the strip and compensate the heating to be consistent with the middle temperature. There are two m...

AI Technical Summary

Problems solved by technology

However, at the uncoiler at the front of the entrance of the continuous annealing unit, during the uncoiling process, cracks are prone to occur due to the large stress at the edge of the steel coil, especially for some special steel types, in winter when the ambient temperature is low, edge cracking is more likely to occur. Partial cracking, affecting normal production and operation

However, because the installation space before the uncoiler is limited, and the reel will become smaller when the uncoiler is uncoiled, the existing edge heaters do not have the following function, so the existing edge heaters cannot be directly applied to the uncoiler

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