Chromium-free insulation coating material for non-oriented silicon steel

A technology of insulating coating and oriented silicon steel, which is applied in coatings, organic insulators, epoxy resin coatings, etc., can solve the problems of dull coating, poor annealing, rejection by downstream users, etc., achieve excellent insulation, eliminate hair loss, etc. sticky effect

Active Publication Date: 2012-05-02
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the coating is dull after stress relief, it is generally considered that the annealing is not good, and the insulation of the product is poor, which is likely to cause rejection by downstream users
After the above chromium-free coatings are stress-relieved and annealed, the coatings are not glossy, which does not meet the needs of users

Method used

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  • Chromium-free insulation coating material for non-oriented silicon steel
  • Chromium-free insulation coating material for non-oriented silicon steel
  • Chromium-free insulation coating material for non-oriented silicon steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0034] 1) Formula (in parts by mass): including aluminum dihydrogen phosphate, naphthenate driers, water-soluble epoxy resin, ethylene glycol and pure water, see Table 1 for details.

[0035] 2) Preparation and application: After mixing the above components at room temperature, use a stirring device to stir at a low speed to make it into a homogeneous solution, and use a roller coater to coat the surface of a non-oriented silicon steel plate with a thickness of 0.5 mm to maintain the coating amount. 1.8g / m 2 , using an open flame baking furnace, baked at a plate temperature of 200-500 ° C to form a film. The performance results of each coating are shown in Table 2.

[0036] Table 1

[0037]

[0038] Table 2

[0039]

[0040] The performance test conditions are as follows (the same below):

[0041] Adhesion test: GB 2522-88.

[0042] Punching test: the number of punching times when the burr height is > 50 μm.

[0043] Weldability test conditions (the same below): Ine...

Embodiment 7～13

[0048] 1) Formula (in parts by mass): dihydrogen phosphate (aluminum dihydrogen phosphate, magnesium dihydrogen phosphate, calcium dihydrogen phosphate or zinc dihydrogen phosphate), epoxy resin emulsion (in dry parts), isooctyl Salt driers, glycerol and pure water, see Table 3 for details.

[0049] 2) Preparation and application: Mix the above-mentioned components at room temperature and stir with a magnetic stirring device for 10 minutes, then use a roller coater to coat the surface of a non-oriented silicon steel plate with a thickness of 0.5mm, and keep the coating amount at 1.8g / m 2 , using an open flame baking furnace, and baked at a plate temperature of 200-500 ° C to form a film. The performance results of each coating are shown in Table 4.

[0050] table 3

[0051]

[0052] Table 4

[0053]

[0054] in:

[0055] P (phosphorus) dissolution test: put the coating sample with a fixed area in the waste water and boil for 10 minutes, then use ICP to test the P diss...

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Abstract

The invention relates to a chromium-free insulation coating material for non-oriented silicon steel. The coating material provided by the invention comprises the following components of: by weight, 100 parts of metal dihydric phosphate, 10-60 parts of an epoxy resin, 0.001-10 parts of a naphthenate or metal ethyl hexoate drier, 0.001-100 parts of an organic solvent, and 60-2000 parts of pure water. The metal dihydric phosphate is Al(H2PO4)3, Mg(H2PO4)2, Ca(H2PO4)2 or Zn(H2PO4)2. The epoxy resin is a water-soluble epoxy resin or an epoxy resin emulsion. After warp-wise coating of the non-oriented silicon steel, the chromium-free insulation coating material provided by the invention has highly transparent appearance, excellent insulation performance, corrosion resistance, adhesiveness, weldability and manufacturability. In addition, the defect that a chromium-free coating is sticky and is not wear resistant is eliminated, and environmental protection of the non-oriented silicon steel coating can be realized.

Description

technical field [0001] The invention relates to the production of non-oriented silicon steel, in particular to a chrome-free insulating coating for non-oriented silicon steel. Background technique [0002] Electrical steel is a ferrosilicon soft magnetic alloy with extremely low carbon content, which is mainly used in the manufacture of electrical equipment such as motors, generators, and transformer cores. The iron loss of electrical steel is the main index to measure the performance of electrical steel products. The iron loss mainly includes three parts: hysteresis loss, eddy current loss and abnormal loss. Non-oriented silicon steel generally needs to be stamped into a blank in the shape of an iron core during subsequent processing, and then fixed by riveting or welding after lamination. [0003] The surface of non-oriented silicon steel sheets generally has an insulating coating to provide a high level of interlayer resistance, so that the eddy current loss of the stato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/25C09D7/12C09D163/02C09D7/48
CPCH01B3/40C09D5/084C09D163/00C09D5/00C09D7/1216C09D7/48
Inventor 许云鹏杨勇杰李登峰吉亚明赵自鹏陈凌云陈晓黄杰
Owner BAOSHAN IRON & STEEL CO LTD
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