Coating method of cold-rolled silicon steel chromium-free insulating coatings, coating rubber roll and coating liquid

Abstract

The invention discloses a coating method of chrome-free insulation coatings of cold rolling silicon steels, a coating rubber roller and coating solution, which is characterized in that technique parameters of the coating rubber roller, operation speed of a unit, composition of the insulation coating solution, specific gravity of the coating solution, temperature of a curing furnace, coating, drying, curing, etc. are selected to carry out optimization for coating band steels. The invention has the advantages and effects lie in that water is employed to disperse the insulation coating solution of chrome-free one-component silicon steels; two rubber rollers with carving grooves are used; in a certain speed and pressure, through curing in a certain temperature, a cold rolled silicon steel plate coating is produced and has the thickness of 1-3 mm, smooth and uniform surface, adhesive force of coating (O grade), insulation property (more than 600 Omega/mm<2>), good rust-proof capability, refrigerant resistance and good punching shear property and has uniform color, luster, no packing, good appearance and environmental production process and products, thus fully meeting the requirements of ROHS Instructions of European Union and national environmental protection policy of the insulation coating of the cold rolling silicon steels.

Description

technical field [0001] The invention belongs to the technical field of metal material surface treatment, and in particular relates to a coating method of a chromium-free insulating coating on cold-rolled silicon steel, a coating rubber roller and a coating liquid. technical background [0002] Cold-rolled silicon steel is mainly used as the iron core of various motors and transformers, and is an indispensable and important soft magnetic alloy in the electric power, electronics and military industries. In addition to the conventional tensile strength, yield strength, and elongation of steel, the cold-rolled silicon steel sheet also requires a smooth and flat surface; good punching performance, welding performance, Heat resistance, insulation performance, and these properties require that the insulation coating performance on the silicon steel plate must be of good quality. [0003] Therefore, large electrical steel companies have their own unique insulating coating formulati...

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Problems solved by technology

[0007] According to the available information, the patented technologies on silicon steel insulating coatings focus on the composition of the coating liquid, and the coating method is relatively small. How to apply the formula and coating liquid, dry and solidify to form a qualified silicon steel coating It is very important in production. Due to the limitations of the production environment and process technology on site, it is difficult to achieve the expected effect if it is simply applied according to the coating liquid formula.

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