Coating for directional electromagnetic steel plate and preparation method of coating

An electromagnetic steel plate and directional technology, applied in the coating, metal material coating process, etc., can solve the problems of insulating coating tension, insulation and corrosion resistance degradation, etc., and achieve excellent slipperiness and good covering property Effect

Active Publication Date: 2019-05-21
NANJING BAOCHUN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tension, insulation and corrosion resistance of the insulating coating on the surface of grain-oriented electrical steel will deteriorate after stress relief annealing

Method used

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  • Coating for directional electromagnetic steel plate and preparation method of coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A coating for directional electrical steel sheets, the proportion of which is:

[0028] 100g aluminum dihydrogen phosphate (calculated as phosphate radical);

[0029] 90g silica sol (as SiO 2 meter), the particle size is 10nm;

[0030] 20gCrO 3 ;

[0031] 1g Ti 4 o 7 , the particle size is 10nm;

[0032] 20g boric acid;

[0033] Add boric acid and titanium compound powder to the silica sol according to the above ratio, form a stable mixed solution by mechanical dispersion or ultrasonic dispersion, mix and stir the mixed solution with phosphate to obtain a coating for oriented electrical steel sheets.

[0034] Use a high magnetic induction oriented electrical steel sheet with a thickness of 0.23mm and a glass film bottom layer, and after shearing, it will be heated at 3%H 2 SO 4 Carry out light pickling at 80°C for 10s in aqueous solution and then dry. Apply the coating on the surface of the steel plate by roller coating. After the coating is dried, carry out si...

Embodiment 2

[0036] A coating for directional electrical steel sheets, the proportion of which is:

[0037] 100g aluminum dihydrogen phosphate (calculated as phosphate radical);

[0038] 90g silica sol (as SiO 2 meter), the particle size is 10nm;

[0039] 20gCrO 3 ;

[0040] 5g Ti 4 o 7 , the particle size is 10nm;

[0041] 20g boric acid;

[0042]Add boric acid and titanium compound powder to the silica sol according to the above ratio, form a stable mixed solution by mechanical dispersion or ultrasonic dispersion, mix and stir the mixed solution with phosphate to obtain a coating for oriented electrical steel sheets.

[0043] Use a high magnetic induction oriented electrical steel sheet with a thickness of 0.23mm and a glass film bottom layer, and after shearing, it will be heated at 3%H 2 SO 4 Carry out light pickling at 80°C for 10s in aqueous solution and then dry. Apply the coating on the surface of the steel plate by roller coating. After the coating is dried, carry out sin...

Embodiment 3

[0045] A coating for directional electrical steel sheets, the proportion of which is:

[0046] 100g aluminum dihydrogen phosphate (calculated as phosphate radical);

[0047] 90g silica sol (as SiO 2 meter), the particle size is 10nm;

[0048] 20gCrO 3 ;

[0049] 10g Ti 4 o 7 , the particle size is 100nm;

[0050] 20g boric acid;

[0051] Add boric acid and titanium compound powder to the silica sol according to the above ratio, form a stable mixed solution by mechanical dispersion or ultrasonic dispersion, mix and stir the mixed solution with phosphate to obtain a coating for oriented electrical steel sheets.

[0052] Use a high magnetic induction oriented electrical steel sheet with a thickness of 0.23mm and a glass film bottom layer, and after shearing, it will be heated at 3%H 2 SO 4 Carry out light pickling at 80°C for 10s in aqueous solution and then dry. Apply the coating on the surface of the steel plate by roller coating. After the coating is dried, carry out ...

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Abstract

The invention discloses coating for a directional electromagnetic steel plate. The coating comprises 100 g of phosphate, 60-120 g of silica sol, 10-30 g of CrO3, 1-20 g of a titaniferous compound and1-30 g of boric acid, wherein the phosphate is counted by phosphate radical and the silica sol is counted by SiO2. The surface of the steel sheet is coated with the coating, and a coating layer is dried and is then thermally treated at 800-950 DEG C for 10-100 s. Compared with the prior art, the coating has the beneficial effects as follows: (1), the coating layer prepared from the coating for thedirectional electromagnetic steel plate has excellent slidability, heat resistance and anti-sticking performance; (2), the coating layer prepared from the coating for the directional electromagneticsteel plate has good covering power, the produced directional electromagnetic steel plate has a good appearance characteristic, namely uniform color and luster.

Description

technical field [0001] The invention relates to a paint and a manufacturing method thereof, in particular to a paint for a grain-oriented electrical steel sheet and a preparation method thereof. Background technique [0002] Grain-oriented electrical steel sheets are hot-rolled and annealed steel slabs containing 2-4% Si, then cold-rolled to the final plate thickness, followed by decarburization annealing, and then coated with a release agent coating mainly composed of magnesium oxide. Coil into steel coils and then perform high-temperature annealing to make the steel plate have Goss-oriented macroscopic grains. At the same time, the magnesium oxide coated on the surface of the steel plate and the silicon dioxide on the surface of the steel plate form a magnesium silicate glass film on the surface of the steel plate through solid phase diffusion reaction. bottom layer. Then, an insulating coating is applied on the surface of the steel plate, and the final product is formed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/61
CPCC09D1/00C09D7/61C23C22/00
Inventor 刘玥杨纲吴世旺
Owner NANJING BAOCHUN NEW MATERIAL TECH CO LTD
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