Novel ingot-material rolling method

Abstract

The invention relates to a novel ingot rolling method, wherein the steel airing and rolling-delay time is between 6 and 12 minutes according to the difference of ingot cases before rolling ingots and after descaling the ingot by a descaler, and the surface temperature of the steel ingots after steel airing is lower than the central temperature of the steel ingots. The steel ingot rolling method is used for controlling the defect of multiple edges of steel plates, and utilizes airing to reduce the temperature gradient caused by the difference of the internal temperature and the external temperature of the steel ingots and the deformation resistance gradient caused by the temperature gradient, so as to increase the deformation seepage power under the condition of surface deformation of rolling pieces, make small deformation capable of generating larger deformation seepage capacity, improve the deformation uniformity of the rolling pieces during rolling, and reduce the difference of internal deformation and external deformation of the rolling pieces, thereby improving the shape quality of the steel plates and the grain uniformity in the steel plates.

Description

technical field [0001] The invention relates to an ingot-to-material rolling method, which belongs to the rolling technical field of steel ingot forming and thick slab rolling process. Background technique [0002] In the normal rolling process of steel ingots, under the condition of insufficient rolling mill capacity, due to the small ratio of the deformation zone length to the thickness of the rolled piece (deformation zone geometry), the contact stress coefficient in the deformation zone is large, and the deformation is in the surface deformation state, the deformation energy is mainly consumed in overcoming the surface friction of the rolled piece, causing a large amount of energy to be consumed in useless work. As a result, there is not enough energy for the deformation and penetration of the rolled piece. Therefore, whether the deformation can penetrate is related to whether the deformation is uniform during the rolling process of the steel plate, whether the internal ...

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Problems solved by technology

[0002] In the normal rolling process of steel ingots, under the condition of insufficient rolling mill capacity, due to the small ratio of the deformation zone length to the thickness of the rolled piece (deformation zone geometry), the contact stress coefficient in the deformation zone is large, and the deformation is in the surface deformation state, the deformation energy is mainly consumed in overcoming the surface friction of the rolled piece, causing a large amount of energy to be consumed in useless work, and as a result, there is not enough energy for the deformation and penetration of the rolled piece

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