Acid-free descaling system capable of obtaining excellent surface appearance and descaling method

Abstract

The invention discloses an acid-free descaling system and descaling method capable of obtaining excellent surface morphology, and relates to the technical field of surface treatment of metal plate strips. The acid-free descaling system comprises an uncoiler, a first pinch turning roller, a straightening machine, a jet flow generating device, a second pinch turning roller and a coiler which are arranged in sequence; a grinding device, a drying device and an oil coating device are arranged between the jet flow generating device and the second pinch steering roller, a cleaning device is further arranged in the grinding device, the grinding device comprises an upper extrusion plate and a lower extrusion plate which are oppositely arranged up and down, and the metal plate strip is located between the upper extrusion plate and the lower extrusion plate; mesh-shaped metal fibers are clamped between the upper extrusion plate and the metal plate strip and between the lower extrusion plate and the metal plate strip respectively, the mesh-shaped metal fibers are filled with abrasive particles, an upper lifting device is arranged on the upper extrusion plate, and a lower lifting device is arranged on the lower extrusion plate. The metal surface which is clean, free of scale residue and specific and excellent in morphology is finally obtained, and the metal surface has excellent oil storage and lubrication performance.

Description

technical field [0001] The invention relates to the technical field of surface treatment of metal strips, in particular to an acid-free descaling system and descaling method capable of obtaining excellent surface appearance. Background technique [0002] Metal materials will form a layer of dense metal oxide on the surface during hot rolling or heat treatment, commonly known as "scale skin". Before the subsequent processing of metal materials, this layer of scales must be removed, otherwise this layer of scales will have an adverse effect on the quality of finished products and processing equipment in subsequent processes. At present, the traditional scale removal technologies are mainly chemical pickling and dry shot blasting, but both methods have pollution discharge problems and insurmountable quality problems, such as pickling is difficult for high-strength steel descaling, dry shot blasting Surface descaling is not clean, roughness, etc., has been increasingly unable t...

AI Technical Summary

Problems solved by technology

Abrasive jet descaling is to use the impact kinetic energy of the accelerated abrasive particles to remove the scales on the metal surface. Therefore, the microscopic surface after descaling will present a random undulating peak and pit shape, and its surface roughness is relatively large. , compared with the relatively smooth surface of the pickling plate, the tiny peaks and sharp corners on the surface of the jet descaling may cause premature wear of subsequent processing equipment such as rolls and molds; moreover, the higher surface roughness will limit its use in For applications in the field of high surface quality products, although the surface roughness can be reduced by reducing the abrasive speed or using smaller particle size abrasives, the descaling efficiency and production capacity will decrease at the same time

[0003] Above, the existing abrasive jet descaling technology, the surface roughness of the treated metal strip is often relatively large, and the microscopic undulations are more obvious, which limits the application range of this technology

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