A kind of production method of sinking roller

Abstract

The invention discloses a production method of a sinking roller, which comprises the following steps: S1, processing the left and right spiral grooves on the circumferential surface of the sinking roller body; S2, sandblasting the surface of the sinking roller; S3, 5. Sinking roller surface anti-corrosion and wear-resistant coating 5 times variable-angle spraying middle layer processing; S5: sinking roller surface anti-corrosion and wear-resistant coating 5 times variable-angle spraying surface processing. In the production process of the present invention, reverse spiral left and right spiral grooves are formed on the surface of the sinking roller body, which reduces the adhesion of zinc slag at the bottom of the groove, thereby prolonging the service life of the sinking roller. The invention shortens the screw pitch and designs the groove cross-section in the form of an arc groove, which can well solve the problem of the groove pattern being transferred to the steel plate. The present invention adopts the spraying method of step S3, step S4, and step S5, and the spraying thickness in the tank is relatively uniform.

Description

technical field [0001] The invention relates to the technical field of hot-dip galvanizing treatment equipment, in particular to a production method of a sunken roll. Background technique [0002] In order to improve the corrosion resistance of the steel plate, hot-dip galvanizing treatment is performed on the surface of the steel plate, and a galvanized layer is formed on the surface of the steel plate, which is called a galvanized steel plate. steel plate. Galvanized steel sheets can be roughly divided into two types: one is the GA steel sheet with the galvanized layer heated after the molten zinc treatment; the other is the GI steel sheet with the galvanized layer not heated after the molten zinc treatment. [0003] When producing galvanized steel sheet, the quality of the galvanizing treatment is very important. The steel sheet is continuously immersed in molten zinc solution at about 500°C for treatment, and rolls for changing the advancing direction of the steel shee...

AI Technical Summary

Problems solved by technology

The surface structure of the sinking roll has a great influence on the quality of the galvanizing treatment. When using the existing sinking roll for galvanizing treatment, there are the following defects: First, it is easy to slip between the sinking roll and the steel plate, thereby damaging the surface of the steel plate The second is that the roller body of the sinking roller is generally made of stainless steel, and the stainless steel roller body is immersed in the molten zinc liquid, which will cause significant corrosion; the third is that the sinking roller and the steel plate are in a high temperature environment, and wear is prone to occur

[0005] In the above-mentioned patent documents, WC-12% Co powder is selected as the spraying material to spray on the surface of the sinking roller, forming a wear-resistant and anti-corrosion layer, which solves the corrosion and wear problems of the sinking roller in molten zinc; There are grooves on the surface of the sinking roller, which solves the slipping problem between the sinking roller and the steel plate, but in actual work, there are the following defects: First, the groove pattern on the surface of the sinking roller is often transferred to the steel plate, thereby reducing the The quality of the steel plate; the second is that the service life of the existing sinking roller is short, because there is zinc slag attached to the bottom of the groove on the surface of the sinking roller, and along with the operation of the production line, the zinc slag will accumulate at the bottom of the groove quickly, Once the zinc slag fills the groove, the zinc slag will scratch the surface of the galvanized steel sheet, and the sinking roller can no longer be used at this time, because the zinc slag accumulates quickly at the bottom of the groove, which will cause the sinking roller The defect of the short service life

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