Electrical steel plate material and preparation method thereof

A technology of electrical steel and steel plates, which is applied in the manufacture of inductors/transformers/magnets, circuits, electrical components, etc., and can solve the problem that the scored electrical steel products cannot be applied to wound core transformer annealing treatment, stress relief annealing treatment, and have no heat resistance To reduce the size of the production site and the requirements of protective facilities, improve the mechanical properties, and improve the hardness

Active Publication Date: 2016-01-13
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 a...

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 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 coat CaO powder with a particle size of 2 μm and MgO powder with a particle size of 1 μm on the inner surface of the scored groove. The volume fraction ratio of CaO powder to MgO powder is 1:2, and the powder coating area Accounting for 55% of the inner surface area of ​​the groove, then spray high-temperature water vapor at the groove, keep it for 5 minutes and then take it out, and form the products of calcium silicate hydrate phase and magnesium silicate hydrate phase on the inner surface of the groove, the volume fraction of the two The ratio is 1:2, the particle size of the product is between 30nm, and the surface area accounts for about 30% 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.

[0053] The magnetic properties of t...

Embodiment 2

[0058] The raw materials are electrical steel sheets processed by laser scoring, and their specifications are 0.23mm thick. Heat the plate to 50°C, and pave CaO powder with a particle size of 0.01 to 4 μm and MgO powder with a particle size of 0.01 to 4 μm on the inner surface of the scored groove. The volume fraction ratio of CaO powder to MgO powder is 1:10, The powder covering area accounts for 40% of the inner surface of the groove, and then spray high-temperature water vapor at the groove, keep it for 5 minutes and then take it out, forming the products of calcium silicate hydrate phase and magnesium silicate hydrate phase on the inner surface of the groove, The volume fraction ratio of the two is 1:9, the particle size of the product is between 1 and 20 nm, and the total surface area accounts for about 40% 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.

[0059] The magneti...

Embodiment 3

[0063] The raw materials are electrical steel sheets processed by laser scoring, and their specifications are 0.27mm thick. Heat the plate to 50°C, and pave CaO powder with a particle size of 1-6 μm and MgO powder with a particle size of 1-5 μm on the inner surface of the scored groove. The volume fraction ratio of CaO powder to MgO powder is 1:5, and the powder The paving area accounts for 50% of the inner surface area of ​​the groove, and then spray high-temperature water vapor at the groove, keep it for 5 minutes and then take it out, and the products of the calcium silicate hydrate phase and the magnesium silicate hydrate phase are formed on the inner surface of the groove. The ratio of the volume fraction is 1:3, the particle size of the product is between 20 and 70nm, and the surface area accounts for about 60% 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.

[0064] The ma...

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Abstract

The invention provides an electrical steel plate material and a preparation method thereof. The electrical steel plate material comprises a platelike electrical steel substrate, nick grooves in the surface of the substrate, and calcium silicate hydrate phase and magnesium silicate hydrate phase distributed on the surface of the nick grooves; the substrate is 0.1-2 mm in thickness; and the diameter of the calcium silicate hydrate phase and magnesium silicate hydrate phase is 1-100 nm. The preparation method comprises the following steps: 1), laser nicking processing; 2), (CaO+MgO) powder processing nick grooves: reacting the CaO, MgO with SiO2 on the surface of the nick grooves to generate the calcium silicate hydrate phase and magnesium silicate hydrate phase; and 3), washing the electrical steel plate material obtained in the step 2) and drying. The electrical steel plate material has excellent heat-resisting effect, namely, the iron loss reduction effect generated by the laser nicking is not eliminated, the original magnetic property of the electrical steel plate material can be maintained, and the insulating coatings on the silicon steel surface are not damaged when the electrical steel plate material is subjected to thermal insulation at the temperature of 800 DEG for 2 hours and annealing treatment; in addition, the preparation method is simple in operation, low in cost and suitable for large-scale industrial production.

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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IPC IPC(8): H01F3/02H01F27/245H01F41/02
Inventor 杨富尧马光程灵吴雪高洁陈新吴细毛祝志祥聂京凯
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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