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Heat treatment method of low-coercivity miniature soft magnetic ring

A heat treatment method and low coercivity technology, applied in the field of material processing, can solve the problems of long annealing time, long process time and low production efficiency

Active Publication Date: 2021-04-23
浙江晶芯磁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above technical scheme adopts the heat treatment process of staged heating to make the soft magnetic material have excellent soft magnetic properties, but still retains three times of heating above 400 ° C, and the annealing time is long, which is used for the processing of miniature soft magnetic rings with an outer diameter of <10mm , resulting in long process time, low production efficiency, and increased production costs

Method used

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  • Heat treatment method of low-coercivity miniature soft magnetic ring

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Effect test

Embodiment 1

[0032] A heat treatment method for a miniature soft magnetic magnetic ring with low coercive force, using an amorphous alloy magnetic ring with a composition of Fe63Co21Si2B14, placing the magnetic ring in a vacuum annealing furnace filled with argon, and the vacuum degree is 4×10 -3 Pa, carry out segmental heating up, and segmental heating up comprises the following steps:

[0033] 1) The first heating step

[0034] From room temperature, the temperature was raised to 330°C in the first stage of 20 minutes, and kept for 15 minutes.

[0035] 2) The second heating step

[0036] From 330°C to 480°C in the second period of 30 minutes, and keep the temperature for 20 minutes.

[0037] 3) The third heating step

[0038] From 480°C to 530°C in the third stage, which takes 15 minutes, and is kept for 20 minutes.

[0039] 4) cooling step

[0040] The magnetic ring is cooled from 530°C to 270°C with the furnace through air cooling for 100 minutes, the cooling time is 30 minutes, a...

Embodiment 2

[0042] A heat treatment method for a miniature soft magnetic magnetic ring with low coercive force, using an amorphous alloy magnetic ring with a composition of Fe63Co21Si2B14, placing the magnetic ring in a vacuum annealing furnace filled with argon, and the vacuum degree is 4×10 -3 Pa, carry out segmental heating up, and segmental heating up comprises the following steps:

[0043] 1) The first heating step

[0044] From room temperature to 380°C in the first period of 30 minutes, and keep warm for 20 minutes.

[0045] 2) The second heating step

[0046] From 380°C to 500°C in the second stage with a duration of 40 minutes, and keep the temperature for 10 minutes.

[0047] 3) The third heating step

[0048] From 500°C to 545°C in the third stage of 20 minutes, and keep it warm for 40 minutes.

[0049] 4) cooling step

[0050] The magnetic ring is cooled from 545°C to 280°C with the furnace through air cooling for 120 minutes, the cooling time is 40 minutes, and then natu...

Embodiment 3

[0052] A heat treatment method for a miniature soft magnetic magnetic ring with low coercive force, using an amorphous alloy magnetic ring with a composition of Fe63Co21Si2B14, placing the magnetic ring in a vacuum annealing furnace filled with argon, and the vacuum degree is 4×10 -3 Pa, carry out segmental heating up, and segmental heating up comprises the following steps:

[0053] 1) The first heating step

[0054] From room temperature, the temperature was raised to 340°C in the first period of 40 minutes, and kept for 25 minutes.

[0055] 2) The second heating step

[0056] From 340°C to 510°C in the second period of 50 minutes, and keep the temperature for 5 minutes.

[0057] 3) The third heating step

[0058] From 510°C to 540°C in the third stage of 25min, and keep it warm for 50min.

[0059] 4) cooling step

[0060]The magnetic ring is cooled from 540°C to 280°C with the furnace through air cooling for 110 minutes, the cooling time is 35 minutes, and then naturall...

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Abstract

The invention belongs to the technical field of material processing, and relates to a heat treatment method of a low-coercivity miniature soft magnetic ring. Segmented heating is carried out in an annealing furnace which contains a soft magnetic ring and is filled with protective gas. The segmented heating comprises the following steps: 1, raising the temperature to 330-390 DEG C in the first segment, and keeping the temperature for the time of t1; 2, raising the temperature to 480-520 DEG C in the second segment, and keeping the temperature for the time of t2; and 3, raising the temperature to 530-545 DEG C in the third segment, and keeping the temperature for the time of t3. According to the method, the design of the annealing process is carried out on the miniature magnetic ring with the outer diameter smaller than 10 mm, the heating and heat preservation time is effectively shortened, the production efficiency is greatly improved, the magnetic ring has low coercivity, and the production cost is reduced while the product quality is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of material processing, and relates to a magnetic material processing method, in particular to a heat treatment method of a low-coercivity miniature soft magnetic magnetic ring. Background technique [0002] Soft magnetism is a magnetic material with low coercivity and high permeability. It is easily magnetized under the action of an external magnetic field, and the magnetic induction intensity basically disappears after removing the external magnetic field. It is widely used in electrical equipment and electronic equipment. The application of soft magnetic materials in industry began at the end of the 19th century. With the rise of electrical engineering and telecommunications technology, low-carbon steel has been used to manufacture motors and transformers, and fine iron powder, iron oxide, and thin iron wires have been used in the magnetic cores of inductance coils in telephone lines. [0003] The soft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/40C21D1/26C21D1/74C21D1/04H01F41/02
CPCC21D9/40C21D1/26C21D1/74C21D1/04H01F41/02
Inventor 罗雪辉姜隽
Owner 浙江晶芯磁业有限公司
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