Method and device for differential leveling and rust removing of hot-rolled steel plate

Abstract

The invention relates to a method and device for differential leveling and rust removing of a hot-rolled steel plate. The device for differential leveling and rust removing of the hot-rolled steel plate comprises a left recoiling machine, a right recoiling machine, a left guide roller, a right guide roller and 1-3 four-roller leveling machines or six-roller leveling machines. The hot-rolled steel plate is level-ground through the leveling machines with upper metal roughened rollers and lower metal roughened rollers, the metal roughened rollers with the uneven surfaces act on the surface of the hot-rolled steel plate under the 60t-1000t pressure and at the differential speed of 5-500 m / minute for differential leveling and rust removing, and oxide scale attached to the surface of the hot-rolled steel plate, surface dirt and various surface defects are destroyed and removed; the speed difference between the upper metal roughened rollers and the hot-rolled steel plate is equal to the speed difference between the lower metal roughened rollers and the hot-rolled steel plate, and the rotating direction of the upper metal roughened rollers and the rotating direction of the lower metal roughened rollers are opposite. According to the device for differential leveling and rust removing of the hot-rolled steel plate, differential leveling of the hot-rolled steel plate is achieved through the meal roughened rollers installed on the leveling machines, the oxide scale on the surface of the hot-rolled steel plate is removed, environment pollution is avoided, the yield platform of the hot-rolled steel plate is eliminated, and the surface quality of the hot-rolled steel plate is improved.

Description

technical field [0001] The invention belongs to the technical field of metal treatment, and relates to a method and equipment for mechanically removing oxide scales on the surface of hot-rolled steel plates, in particular to a method and device for differential smoothing and derusting of hot-rolled steel plates. Background technique [0002] The hot-rolled steel plate produced at high temperature will form a layer of iron oxide scale with a thickness of about 0.01 mm and brittleness at room temperature after cooling. The hardness of this layer of iron oxide scale is greater than that of the metal matrix of the hot-rolled steel plate, and It is firmly attached to the surface of the metal matrix of the hot-rolled steel plate. If this layer of iron oxide scale is not removed, after it is deeply crushed and crushed during the cold rolling process, the flaky iron oxide scale is easily embedded in the metal matrix of the steel plate, resulting in product quality defects. Therefore...

AI Technical Summary

Problems solved by technology

Rust, stains (color difference and color spots) and various surface defects (scratches, pits, roll marks, etc.) remaining on the surface of cold-rolled steel sheets cannot be effectively eliminated in the non-differential speed leveling process

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