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Coating formula of oriented silicon steel barrier coat

A technology of isolation coating and oriented silicon steel, which is applied in the field of coating formulations, can solve the problems of low quality of the bottom layer, weak bottom layer activity, and shorten the life of oriented silicon steel, and achieve good insulation, high adhesion, and improved quality. Effect

Inactive Publication Date: 2013-05-22
GUANGDONG YINGQUAN HIGH TECH MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, coating the isolation coating on the surface of the silicon steel plate is a necessary process before the silicon steel enters the high-temperature bell furnace. The traditional method of preparing the bottom layer of the magnesium silicate glass film is to form by the reaction of magnesium oxide and silicon dioxide under high temperature conditions. , wherein the release agent for oriented silicon steel is magnesia. The bottom layer of the magnesium silicate glass film obtained by a single magnesia release agent has high hardness, good insulation, and is firmly combined with the steel strip, but the quality of the bottom layer is not high, which reduces the quality of the oriented silicon steel. lifetime, the activity of the bottom layer is also weak

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] First mix according to the ratio of 15 parts of light magnesium oxide, 1.5 parts of titanium dioxide, 0.3 parts of borax or boric acid and 85 parts of deionized water in parts by weight, stir under freezing conditions, and fully stir the coating for 2 hours. , for coating, the coating amount is 6.0g / m2, after coating, it is dried in a drying oven at 600°C. After cooling below 80°C, it is coiled, and then immediately sent to a high-temperature bell furnace for high-temperature annealing. The quality of the bottom layer of the magnesium silicate glass film prepared by the above-mentioned weight ratio of the formula is good, the iron loss content is 1.10w / kg, the magnetic induction is 1.87T, and the interlayer resistance is infinite.

Embodiment 2

[0022] First mix according to the ratio of 13.0 parts of light magnesium oxide, 0.8 parts of titanium dioxide, 0.1 part of borax or boric acid, 0.2 parts of antimony dioxide or antimony sulfate and 85 parts of deionized water in parts by weight, stir under freezing conditions, and the coating is fully After stirring for 2 hours, it was coated under refrigerated conditions with a coating weight of 5.5 g / m, and dried in a drying oven at 550° C. after coating. After cooling below 80°C, it is coiled, and then immediately sent to a high-temperature bell furnace for high-temperature annealing. The quality of the bottom layer of the magnesium silicate glass film prepared by the above-mentioned weight ratio of the formula is good, the iron loss content is 1.09w / kg, the magnetic induction is 1.90T, and the interlayer resistance is infinite.

Embodiment 3

[0024] First mix according to the ratio of 13.0 parts of light magnesium oxide, 0.8 parts of titanium dioxide, 0.1 part of borax or boric acid and 85 parts of deionized water in parts by weight, stir under freezing conditions, and fully stir the coating for 2 hours. , for coating, the coating amount is 5.5g / m, after coating, dry in a drying oven at 550°C. After cooling below 80°C, it is coiled, and then immediately sent to a high-temperature bell furnace for high-temperature annealing. The quality of the bottom layer of the magnesium silicate glass film prepared by the above-mentioned weight ratio of the formula is good, the iron loss content is 1.06w / kg, the magnetic induction is 1.88T, and the interlayer resistance is infinite.

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Abstract

The invention discloses a coating formula of oriented silicon steel barrier coat; the coating formula comprises the following components in parts by weight: 10-15 parts of light-weight magnesium oxide, 0-3 parts of nano magnesium oxide, 0.5-1.5 parts of titanium dioxide, 0.1-1.0 part of boride, 0-0.5 parts of antimonide and 79-89 parts of de-ionized water. The coat prepared according to the formula can enable the surface of an oriented silicon steel to form excellent magnesium silicate film substrate layer, and thus the surface quality, the magnetism and the activity of the silicon steel are improved; the formula not only can be used for normal oriented silicon steel but also can be used for high magnetic strength oriented silicon steel.

Description

technical field [0001] The invention relates to a paint formulation of a coating, in particular to a paint formulation of an oriented silicon steel isolation coating. Background technique [0002] In the production process of grain-oriented silicon steel, after the primary recrystallization is completed by rolling and decarburization annealing, high-temperature annealing is carried out in a high-temperature bell furnace, and under the action of inhibitors, secondary recrystallization occurs to form a single (110)[001] Texture, so as to obtain excellent electromagnetic properties of high magnetic induction and low iron loss. At the same time, coating the isolation coating on the surface of the silicon steel plate is a necessary process before the silicon steel enters the high-temperature bell furnace. The traditional method of preparing the bottom layer of the magnesium silicate glass film is to form by the reaction of magnesium oxide and silicon dioxide under high temperatur...

Claims

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Application Information

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IPC IPC(8): C21D1/68
Inventor 彭志华李晓强钟洁容罗开东刘小敏梁康宁
Owner GUANGDONG YINGQUAN HIGH TECH MATERIALS CO LTD
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