Electrical steel plate and preparation method thereof

A technology for electrical steel and steel plates, which is applied in metal processing equipment, manufacturing tools, welding equipment, etc., and can solve the problems that scored electrical steel products cannot be applied to wound core transformer annealing treatment, stress relief annealing treatment, and lack of heat resistance , to achieve the effect of reducing the size of the production site and the requirements of protective facilities, increasing the strength and improving the mechanical properties

Active Publication Date: 2016-01-06
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the existing laser scribing technology does not have heat resistance, that is, the silicon steel products after laser scribing cannot be subjected to stress relief annealing, and annealing will cause the iron loss to increase and return to the level before laser scribing
Scored electrical steel products that cannot be achieved with existing technology cannot be used in the field of annealing of coiled core transformers or cores that require bending of silicon steel products

Method used

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  • Electrical steel plate and preparation method thereof
  • Electrical steel plate and preparation method thereof
  • Electrical steel plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The raw materials are electrical steel plates processed by laser scoring, and their specifications are 0.18mm thick. Heat the plate to 50°C, and spread CaO powder with a particle size of 2 μm on the inner surface of the scored groove. The powder covering area accounts for 60% of the inner surface area of ​​the groove, and then spray high-temperature water vapor on the groove for 5 minutes and then taken out, CaSiO is formed on the inner surface of the trench 3 Phase product, the particle size of the product is 30nm, and the surface area accounts for about 30% of the inner surface area of ​​the groove. Then rinse the surface with clean water for 2 minutes, and dry it at room temperature.

[0049] The magnetic properties of the processed electrical steel samples were tested first, followed by annealing at 800°C for 2 hours, and then the magnetic properties were tested. The test results are shown in Table 5. It can be seen from Table 5 that the properties of the raw mate...

Embodiment 2

[0054] The raw materials are electrical steel sheets processed by laser scoring, and their specifications are 0.27mm thick. At room temperature, spread CaO powder with a particle size of 0.01-1 μm on the inner surface of the scored groove, the powder covering area accounts for 50% of the inner surface area of ​​the groove, and then spray high-temperature water vapor on the groove for 5 minutes and then taken out, CaSiO is formed on the inner surface of the trench 3 Phase product, the particle size of the product is 1-10nm, and the surface area accounts for about 20% of the inner surface area of ​​the groove. Then use a weak acid solution to rinse the surface for 2 minutes, and dry it at room temperature.

[0055] The magnetic properties of the treated electrical steel samples were tested first, followed by annealing at 800°C for 2 hours, and then the magnetic properties were tested. The test results are shown in Table 6. It can be seen from Table 6 that the properties of the...

Embodiment 3

[0059] The raw materials are electrical steel sheets processed by laser scoring, and their specifications are 0.27mm thick. At room temperature, spread CaO powder with a particle size of 1-5 μm on the inner surface of the scored groove, and the powder coating area accounts for 65% of the inner surface area of ​​the groove, and then spray high-temperature water vapor on the groove for 5 minutes and then taken out, CaSiO is formed on the inner surface of the trench 3 Phase product, the particle size of the product is 15-50nm, and the surface area accounts for about 45% of the inner surface area of ​​the groove. Then the surface was rinsed with a neutral salt solution for 2 minutes, and dried at room temperature.

[0060] The magnetic properties of the treated electrical steel samples were tested first, followed by annealing at 800°C for 2 hours, and then the magnetic properties were tested. The test results are shown in Table 7. It can be seen from Table 7 that the properties ...

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Abstract

The invention provides an electrical steel plate and a preparation method thereof. The electrical steel plate comprises a plate-shaped electrical steel substrate, etching grooves on the surface of the substrate and CaSiO3 phases distributed on the surface of the etching grooves, wherein the thickness of the substrate is 0.1 to 2 millimeters, and the diameter of the CaSiO3 phases is 1 to 100 nanometers. The preparation method comprises the following steps of: 1) carrying out laser etching treatment; 2) processing the etching grooves with CaO powder, wherein CaO and SiO2 on the surfaces of the etching grooves react to generate the CaSiO3 phases on the surfaces of the etching grooves; and 3) washing and drying the electrical steel plate. The CaSiO3 phases have strong pinning effects relative to tensile stress or dislocation of regions around the grooves, a processed laser etching product has excellent thermal resistance, the iron loss reduction effect generated by laser etching cannot be disappeared after the product is subjected to thermal insulation and annealing treatment at 800 DEG C for 2 hours, and the original magnetic performance is basically maintained. The method is simple in operation, and production and application at a large scale are promoted.

Description

technical field [0001] The invention relates to an oriented silicon steel for a power transformer, in particular to an electrical steel plate and a preparation method thereof. Background technique [0002] In recent years, people try to apply more laser technology to the research of magnetic domain refinement technology. Rauscher et al. used continuous CO 2 The laser and high-energy fiber laser are used for laser scoring of the oriented silicon steel sheet. The high-energy fiber laser reduces the iron loss by about 13%, and the surface of the silicon steel sheet has no damage. Yang Yuling et al. used the laser nitriding method to carry out local linear nitriding treatment on the surface of grain-oriented silicon steel, studied the influence of laser process parameters on the nitride formation on the surface of silicon steel, and invented the method of continuous CO 2 Laser localized surface alloying of oriented silicon steel by laser, which significantly improves the high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/34B23K26/364B23K26/144
Inventor 杨富尧马光吴细毛程灵高洁吴雪陈新聂京凯祝志祥陈川
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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