Semi-organic-semi-inorganic silicon steel sheet coating solution for welding, preparation method and application

Abstract

The invention discloses a semi-organic-semi-inorganic silicon steel sheet coating solution for welding. The semi-organic-semi-inorganic silicon steel sheet coating solution consists of inorganic components, organic silicon modified acrylic emulsion, silane polymer, polyol, disinfectant The foaming agent is composed according to the mass ratio (8-24):1:(0.1-0.8):(0.1-1):(0.01-0.05). The invention also discloses the preparation method and application of the semi-organic-semi-inorganic silicon steel sheet coating liquid. The coating solution of the invention has high acid resistance stability and high mechanical stability; the coating has good adhesion, gloss and hardness, and the film-forming quality is uniform; the coating contains Si-O bonds, which greatly improves the welding performance of the coating.

Description

technical field [0001] The invention relates to a cold-rolled silicon steel sheet coating, in particular to a semi-organic-semi-inorganic silicon steel sheet coating solution for welding, a preparation method and application thereof. Background technique [0002] Cold-rolled non-oriented silicon steel sheets are mainly used to manufacture various types of motor cores. Silicon steel sheets need to be stacked together in the process of making the iron core. When the motor is running at the operating frequency, the alternating magnetic field will cause eddy current loss in the iron core. Therefore, it is necessary to apply an insulating coating on the surface of the silicon steel sheet. This insulating coating not only needs to have good insulation, but also has good punchability, adhesion and corrosion resistance. [0003] The non-oriented silicon steel coating is mainly chromate-acrylic resin semi-inorganic and semi-organic coating. This technical formula is mainly imported ...

AI Technical Summary

Problems solved by technology

When rolling silicon steel sheets that require weldability, it is necessary to separately configure rolls with surface roughness Ra≥0.5μm in the finished pass, and it is necessary to stop the machine to replace the rolls and formulate a separate rolling process to prevent the surface roughness from being too large. Affects the lamination coefficient, which greatly affects the operating efficiency and roll consumption of the pickling mill

At present, there are no published patents on the market to achieve the purpose of improving welding performance through the adjustment of coating liquid formula and coating process, and it is difficult to meet the individual needs of users.

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