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C chromium-free semi-organic insulating coating suitable for Bi-containing ultrahigh magnetic induction oriented silicon steel without bottom layer

A technology of insulating coating and oriented silicon steel, applied in epoxy resin coating, coating, device for coating liquid on the surface, etc. It can solve the problems of poor bottom layer and easy falling off without considering the substrate, and achieve excellent insulation and welding performance. , The effect of good coating adhesion and good welding performance

Inactive Publication Date: 2020-10-09
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although these formulas can better meet certain properties of the steel plate after coating liquid coating, they do not consider the problem of poor bottom layer and easy peeling off of the substrate, and are not suitable for ultra-high magnetic induction oriented silicon steel without bottom layer containing Bi.

Method used

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  • C chromium-free semi-organic insulating coating suitable for Bi-containing ultrahigh magnetic induction oriented silicon steel without bottom layer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The raw materials of the chrome-free semi-organic insulating coating suitable for the Bi-containing ultra-high magnetic induction oriented silicon steel 1 without bottom layer include 22% magnesium phosphate aqueous solution (in the phosphate aqueous solution, the phosphate content is 33%), 8% colloidal silica, 50% acrylic resin and 2.5% alumina, and the balance is water.

[0033] The above-mentioned raw materials are mixed to obtain a Bi-containing ultra-high magnetic induction grain-oriented silicon steel 1 suitable for no bottom layer.

Embodiment 2

[0035] This embodiment is basically the same as Embodiment 1, the difference is:

[0036] The raw materials of the chromium-free semi-organic insulating coating suitable for the Bi-containing ultra-high magnetic induction oriented silicon steel 2 without bottom layer include 20% magnesium phosphate aqueous solution (in the magnesium phosphate aqueous solution, the magnesium phosphate content is 33%), 8% Colloidal aluminum oxide, 52% polyamideimide organic resin and 3.5% calcium oxide, and the balance is water.

Embodiment 3

[0038] This embodiment is basically the same as Embodiment 1, the difference is:

[0039] The raw materials of the chromium-free semi-organic insulating coating suitable for the Bi-containing ultra-high magnetic induction oriented silicon steel 3 without bottom layer include 19% magnesium phosphate aqueous solution (in the magnesium phosphate aqueous solution, the magnesium phosphate content is 33%), 6% Colloidal titanium dioxide, 49% epoxy resin and 2% aluminum oxide, the balance is water.

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Abstract

The invention discloses a chromium-free semi-organic insulating coating suitable for Bi-containing ultrahigh magnetic induction oriented silicon steel without a bottom layer. The chromium-free semi-organic insulating coating is prepared from the following raw materials in percentage by weight: 15 to 25 percent of phosphate aqueous solution, 1 to 15 percent of colloidal silicon dioxide or colloidalaluminum oxide or titanium dioxide, 30 to 60 percent of organic resin, 0.5 to 5 percent of metal oxide and the balance of water, wherein in the phosphate aqueous solution, the content of phosphate is33%, and positive ions are any one or more of Mg, Al, Ca, Zn and Na; in the metal oxide, metal cations are any one or more of Mn, Co, Ni, Al, Ca and Na. After being coated, the coating is dried at the temperature of 300-500 DEG C, resin on the surface layer of a steel plate is segregated, an insulating film cannot be damaged, the coating is good in welding performance, and when the welding speedis 80-120 cm / min, bubbles and air holes are not generated at a weld joint.

Description

technical field [0001] The invention relates to the field of insulating coatings, in particular to a chrome-free semi-organic insulating coating suitable for Bi-containing ultra-high magnetic induction oriented silicon steel without a bottom layer. Background technique [0002] Oriented silicon steel is widely used as magnetic iron core material, mainly for the manufacture of iron cores for transformers and large motors in the power transmission and transformation industry. In recent years, due to the increasingly urgent social requirements for energy saving and environmental protection, the requirements for reducing the iron loss of oriented silicon steel and improving the magnetization characteristics have also become more intense. In the design of motors and transformers, it is urgent to further increase the magnetic induction intensity, which is conducive to saving electrical appliances. cost and reduce noise. [0003] The current manufacturing method of grain-oriented ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D179/08C09D163/00C09D161/20C09D7/61C09D5/25C22C38/02C22C38/04C22C38/06C21D8/12B05D7/14B05D7/24B05D3/02B05D5/12
CPCB05D3/0254B05D5/12B05D7/14B05D7/24B05D2202/15C08K2003/2206C08K2003/222C08K2003/2227C08K2003/2241C08K2003/325C08K2003/326C08K2003/327C08K2003/328C08K2201/014C09D133/00C09D161/20C09D163/00C09D179/08C21D8/1255C21D8/1283C22C38/002C22C38/02C22C38/04C22C38/06C09D7/61C08K3/32C08K3/36C08K3/22C08L63/00
Inventor 刘婷胡守天杨佳欣刘敏宋刚赵胜利陈博
Owner 武汉钢铁有限公司
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