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Annealing treatment method for high-speed motor cell material

A technology of annealing treatment and high-speed motors, which is applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve the problem of poor promotion, high-speed motor core material coercive force and magnetic permeability are not good performance indicators, Expensive equipment and other issues, to achieve significant atomic diffusion, shorten the annealing time, reduce the effect of coercive force

Inactive Publication Date: 2019-04-16
LIUZHOU KAITONG NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the traditional annealing method, it has the advantages of non-contact, fast execution (only a few microseconds) and no need for any atmosphere. It is considered to be the best way to reduce the coercive force of the material and improve the magnetic permeability, but its equipment Expensive, so not well promoted
[0005] In contrast to the traditional annealing method, the technical principle of this method is to heat the sample for a certain period of time in a certain atmosphere or in a vacuum, by releasing the internal stress of the material and increasing the transverse anisotropy to reduce the coercive force and To improve the magnetic permeability, many domestic manufacturers use the one-time annealing method. The coercive force and magnetic permeability of the high-speed motor core materials manufactured by this method are still not good enough.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] ⑴ Send the high-speed motor cell block material with a diameter of 20mm and a chemical composition of 4.5%Si, 8.5%B, 0.2%P, 0.7%Cu, 0.7%Nb, and Fe as the balance into the vacuum annealing furnace, and close the furnace door , so that a closed cavity is formed in the entire vacuum annealing furnace, and the vacuum degree is -0.1Mpa; then a mixed gas with a volume ratio of 80%Ar+20%CO is introduced, and the gas flow rate is controlled at 200mL / min, so that the vacuum furnace The internal gas constant pressure is 0.2 Mpa;

[0029] (2) Start the heating device, and the temperature in the vacuum annealing furnace for temperature rise and heat preservation is 500°C; keep warm for 2 hours; turn off the heating device, pass in compressed cold air to quickly cool down, adjust the flow rate of cold air to 30L / min, and the cooling rate is ≥30°C / min, Make the high-speed motor cell material quickly drop to room temperature;

[0030] (3) Take out the billet after the first annealing...

Embodiment 2

[0037] ⑴ Send the high-speed motor battery block material with a diameter of 22.5mm and a chemical composition of 4.5%Si, 8.5%B, 0.2%P, 0.7%Cu, 0.7%Nb, and Fe as the balance into the vacuum annealing furnace, and close the furnace door, so that the entire vacuum annealing furnace forms a closed cavity, vacuumize, and the vacuum degree is -0.1Mpa; then pass in a mixed gas with a volume ratio of 80%Ar+20%CO, and control the gas flow rate to 200mL / min to make the vacuum The constant gas pressure in the furnace is 0.2 Mpa;

[0038] ⑵Start the heating device, the temperature in the vacuum annealing furnace for heating and heat preservation is 525°C; keep warm for 2.5h; turn off the heating device, pass in compressed cold air to quickly cool down, adjust the flow of cold air to 30L / min, and the cooling rate is ≥30°C / min , so that the high-speed motor cell material quickly drops to room temperature;

[0039] (3) Take out the blank after the first annealing, crush it to a particle si...

Embodiment 3

[0046] ⑴ Send the high-speed motor battery block material with a diameter of 25mm and a chemical composition of 4.5%Si, 8.5%B, 0.2%P, 0.7%Cu, 0.7%Nb, and Fe as the balance into the vacuum annealing furnace, and close the furnace door , so that a closed cavity is formed in the entire vacuum annealing furnace, and the vacuum degree is -0.1Mpa; then a mixed gas with a volume ratio of 80%Ar+20%CO is introduced, and the gas flow rate is controlled at 200mL / min, so that the vacuum furnace The internal gas constant pressure is 0.2 Mpa;

[0047] (2) Start the heating device, and the temperature in the vacuum annealing furnace for temperature rise and heat preservation is 550°C; keep warm for 3 hours; turn off the heating device, pass in compressed cold air to quickly cool down, adjust the flow rate of cold air to 30L / min, and the cooling rate is ≥30°C / min, Make the high-speed motor cell material quickly drop to room temperature;

[0048] (3) Take out the billet after the first anneal...

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Abstract

The invention discloses an annealing treatment method for a high-speed motor cell material and belongs to the technical field of processing soft magnetic materials of high-speed motor cells. The annealing treatment method for the high-speed motor cell material comprises the following steps that a cold blank of the high-speed motor cell material is cold-rolled into blocks with the size of 20-25 mm,and then primary annealing treatment is performed; a blank after the primary annealing treatment is crushed to 4-5 mm, and then secondary annealing treatment is carried out; and the blank after the secondary annealing treatment is crushed into fine powder with the mesh being less than 100 by a ball mill, and then tertiary annealing treatment is carried out. According to the annealing treatment method for the high-speed motor cell material, by reasonably arranging three times of annealing treatment, the coercive force of the high-speed motor cell material is greatly reduced, the magnetic conductivity is improved, and accordingly the performance of the high-speed motor cell material is further improved.

Description

technical field [0001] The invention discloses an annealing treatment method for a high-speed motor electric core material. The invention belongs to the technical field of processing soft magnetic materials for electric cores of high-speed motors. Background technique [0002] The high-speed motor battery core material is a kind of magnetic material, which has excellent magnetic characteristics and energy-saving, material-saving, and environmental protection effects. It is a high-performance material that cannot be compared with other magnetic materials. As an important functional material, it has been widely used in pure electric vehicles, high-speed rail, military (electromagnetic ejection), etc. The commonly used annealing treatments for high-speed motor core materials are traditional stress annealing methods, laser annealing methods, and traditional annealing methods. [0003] The traditional stress annealing method is to add external stress during annealing to change ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/26C21D1/76C21D1/773C21D9/00C22C38/02C22C38/12C22C38/16C21D1/04
CPCC21D1/04C21D1/26C21D1/76C21D1/773C21D9/0068C22C38/002C22C38/02C22C38/12C22C38/16
Inventor 黎超英吴沛荣
Owner LIUZHOU KAITONG NEW MATERIAL TECH CO LTD
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