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A kind of intergranular insulating high-silicon steel core and its preparation method

A high-silicon and high-silicon technology, applied to the high-silicon steel core with inter-particle insulation and its preparation field, can solve the problems of high eddy current loss and poor plastic toughness of the silicon-steel core, and achieve extended service life, high density, Avoiding the effect of plate thickness limitations

Active Publication Date: 2019-03-19
ANHUI UNIVERSITY OF TECHNOLOGY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the relatively poor plasticity and toughness of high-silicon steel, and it is difficult to control the thickness of the silicon steel sheet below 1mm by the existing method, thus resulting in relatively high eddy current loss of the silicon steel core. Insulated high-silicon steel core and preparation method thereof

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  • A kind of intergranular insulating high-silicon steel core and its preparation method
  • A kind of intergranular insulating high-silicon steel core and its preparation method

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Effect test

Embodiment 1

[0040] The preparation method of a high-silicon steel core with interparticle insulation in this embodiment first uses silicon powder to embed and siliconize the high-silicon iron-silicon alloy powder; then oxidizes the silicon-infiltrated high-silicon iron-silicon alloy powder treatment to form a layer of SiO on the surface of the high-silicon-iron-silicon alloy powder 2 Afterwards, the oxidized alloy powder is insulated and coated with inorganic oxides, and sintered to obtain a high-silicon steel core with inter-particle insulation. The specific steps are as follows:

[0041] The first step, embedding silicon infiltration of high-silicon-iron-silicon alloy powder

[0042] First mix 95wt% high-silicon-iron-silicon alloy powder and 5wt% silicon powder evenly, and then conduct heat treatment under the protection of nitrogen. High-silicon iron-silicon alloy powder after silicon.

[0043] The second step, the surface insulation coating of high-silicon-iron-silicon alloy powder ...

Embodiment 2

[0054] A kind of preparation method of the high-silicon steel core of intergranular insulation of the present embodiment, its specific steps are as follows:

[0055] The first step, embedding silicon infiltration of high-silicon-iron-silicon alloy powder

[0056] First mix 96wt% high-silicon-iron-silicon alloy powder and 4wt% silicon powder evenly, and then conduct heat treatment under the protection of argon. High-silicon iron-silicon alloy powder after silicon infiltration.

[0057] The second step, the surface insulation coating of high-silicon-iron-silicon alloy powder

[0058] Place the high-silicon-iron-silicon alloy powder embedded in silicon infiltration in a tubular annealing furnace, and carry out oxidation treatment in an air atmosphere. The oxidation treatment temperature is set at 450°C, and the holding time is 2 hours; , kept at 850° C. for 1 hour to obtain high-silicon-iron-silicon alloy powder with surface insulation coating. Among them: the mass ratio of hi...

Embodiment 3

[0064] A kind of preparation method of the high-silicon steel core of intergranular insulation of the present embodiment, its specific steps are as follows:

[0065] The first step, embedding silicon infiltration of high-silicon-iron-silicon alloy powder

[0066] First mix 98wt% high-silicon-iron-silicon alloy powder and 2wt% silicon powder evenly, and then conduct heat treatment under the protection of nitrogen. High-silicon iron-silicon alloy powder after silicon.

[0067] The second step, the surface insulation coating of high-silicon-iron-silicon alloy powder

[0068]Place the high-silicon-iron-silicon alloy powder embedded in silicon infiltration in a tubular annealing furnace, and carry out oxidation treatment in an air atmosphere. The oxidation treatment temperature is set at 600 ° C, and the holding time is 3 h; 2 o 3 The powder is kept under the protection of argon at 1050° C. for 1.5 hours to obtain a high-silicon-iron-silicon alloy powder with surface insulation ...

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Abstract

The invention discloses a high-silicon steel core insulated between particles and a preparation method thereof, belonging to the technical field of high-silicon steel cores. In the present invention, high-silicon-iron-silicon alloy powder and silicon powder are evenly mixed, and heat-treated at 500-1000°C for 0.5-5h under the protection of an inert gas; the composite powder after heat treatment is oxidized at 300-600°C for 1-5h under an oxidizing atmosphere. Then add inorganic oxide powder, and under the protection of inert gas, keep warm at 750-1050°C for 0.5-4h; place the high-silicon-iron-silicon alloy composite powder with surface insulation coating in a spark plasma sintering furnace, and heat it at 20-1050°C for 0.5-4 hours. The heating rate of 150°C / min is raised from room temperature to 900-1300°C, kept for 5-20 minutes, cooled with the furnace, taken out of the furnace, and demolded to obtain a high-silicon steel core with insulation between particles. The preparation method of the invention has the advantages of simple process, short cycle, high material utilization rate and low cost, and the prepared high silicon steel core has lower iron loss, better mechanical strength, higher thermal stability and longer service life.

Description

technical field [0001] The invention belongs to the technical field of high-silicon steel cores, and more specifically relates to a high-silicon steel core insulating between particles and a preparation method thereof. Background technique [0002] Silicon steel is an important kind of soft magnetic material, and the electric and electronic industries cannot do without it when manufacturing motors, transformers, transformers, reactors and other electrical instruments. Studies have shown that with the increase of silicon content in silicon steel, its resistivity increases, eddy current loss decreases, relative magnetic permeability and magnetic induction intensity increase, and it shows excellent soft magnetic properties, which can meet the application requirements of high-frequency electromagnetic conversion equipment . [0003] Usually, the eddy current loss of the silicon steel core is proportional to the square of the thickness of the silicon steel sheet, so the thicknes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/147H01F1/24C23C10/46B22F1/02
CPCH01F1/14766H01F1/24H01F41/0246C23C10/46B22F1/16
Inventor 吴朝阳李光强樊希安李杰王万林甘章华
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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