Control method for warpage deformation of hot-rolled open plate

Abstract

The invention provides a control method for buckling deformation of a hot rolled open flat. The control method for the buckling deformation of the hot rolled open flat comprises setting a temperature threshold condition and judging band steel enters into a straightener to perform straightening according to the temperature threshold condition; measuring a head buckling deformation amount D0 of the band steel after the band steel head passes a straightener outlet; setting a first buckling deformation amount threshold condition, comparing the head buckling deformation amount D0 of the band steel and the first buckling deformation amount threshold condition, judging the band steel cross section according to a comparing result and manufacturing into the hot rolled open flat.; measuring a head buckling deformation amount D1 and a tail buckling deformation amount D2 of the hot rolled open flat and computing an average buckling deformation amount D of the hot rolled open flat according to a formula; setting a second buckling deformation amount threshold condition, comparing the average buckling deformation amount D and the second buckling deformation amount threshold condition and setting technical parameters of the straightener according to a comparing result. The control method for the buckling deformation of the hot rolled open flat effectively controls the buckling deformation amount of the hot rolled open flat and accordingly achieves the purpose of producing qualified open flat products.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a method for controlling the warping deformation of a hot-rolled flat plate. Background technique [0002] Generally, users of hot-rolled coils have to go through straightening and shearing processes to make flat sheets before use, and then proceed to the next step of the process, and the shape quality of the flat-rolled products is decisive for the user's follow-up process and the quality of the final product. However, once the hot-rolled coil is made into an open flat plate, it is difficult to effectively correct the shape of the open flat plate. [0003] The difficulty in the quality control of thick-gauge hot-rolled split flats lies in the warping deformation along the length and width directions of the split flats. After that, the degree of warpage changes greatly during the placement process. These two problems have adverse effects on the parameter adjus...

AI Technical Summary

Problems solved by technology

These two problems have adverse effects on the parameter adjustment and final quality judgment in the straightening process, resulting in the general straightening process parameter setting method can not meet the requirements of the shape quality of the flat plate, and can not effectively control the warping of the flat plate The stability of bending deformation cannot produce qualified open flat products.

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