CN102127622B - Method for improving magnetic characteristics of orientated silicon steel by heat treatment of pulse electric field - Google Patents
Method for improving magnetic characteristics of orientated silicon steel by heat treatment of pulse electric field Download PDFInfo
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- CN102127622B CN102127622B CN 201110009420 CN201110009420A CN102127622B CN 102127622 B CN102127622 B CN 102127622B CN 201110009420 CN201110009420 CN 201110009420 CN 201110009420 A CN201110009420 A CN 201110009420A CN 102127622 B CN102127622 B CN 102127622B
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- silicon steel
- oriented silicon
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- electric field
- magnetic characteristics
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Abstract
The invention belongs to the fields of material science and engineering research, and mainly relates to a method for improving the magnetic characteristics of orientated silicon steel by a pulse electric field. The method for improving the magnetic characteristics of orientated silicon steel by heat treatment of a pulse electric field comprises the following steps of: adopting an electric pulse modification (EPM)-C type electric pulse generator for the annealing test, wherein a lead wire is directly connected with two ends on one side of a sample and is protected by a high purity corundum protecting tube; annealing in a box resistance furnace, adopting gas atmosphere protection, heating an oriented silicon steel sheet from the room temperature to the required annealing temperature, insulating for a period of time, treating the oriented silicon steel sheet in the pulse electric field during the insulation period, and then taking out the oriented silicon steel sheet and cooling in the air to the room temperature. The invention has the advantages that: (1) the equipment and operation are simple; (2) the magnetic characteristics of the oriented silicon steel sheet are improved greatly with stable effects; and (3) the damaged area of the surface coating of the oriented silicon steel sheet is small.
Description
Technical field
The invention belongs to the Materials Science and Engineering research field, related generally to a kind of method that improves the oriented silicon steel magnetic property through pulsed electrical field.
Technical background
Oriented silicon steel is widely used in electric power, electronic industry, is used as core material in X-former and the motor, needs good magnetic performance, but because technical difficulty is big, present fertile enterprise is extremely limited.The demand of relevant industries constantly develops, and brings the raising to the oriented silicon steel manufacturing requirements, and the magnetic property that therefore how to improve oriented silicon steel has become increasingly important.And
P 17/50 (iron loss under 50Hz frequency, the 1.7T magnetic induction density) and
B 8 (magnetic induction density under the 800A/m magnetic field) is the index that directly reflects the oriented silicon steel magnetic property.The present invention adopts suitable electricimpulse art breading parameter, can effectively reduce the oriented silicon steel sheet
P 17/50 , and improve it simultaneously
B 8
Summary of the invention
The object of the present invention is to provide a kind of easy handling, effective, cost is low, improve the method for oriented silicon steel sheet magnetic property.This law utilizes electricimpulse can produce around the characteristics of pulsed magnetic field and combines high temperature annealing, makes the oriented silicon steel sheet
P 17/50 Reduce, make it simultaneously
B 8 Increase.
Pulsed electrical field improves oriented silicon steel sheet magnetic property principle: oriented silicon steel because of its easy magnetization axis < 001>mostly and rolling direction parallel, its domain structure mainly is 180 ° of magnetic domains that are arranged parallel to each other.The pulsed electrical field that in annealing process, oriented silicon steel is applied, inspire direction for around steel disc roll to magnetic field, cause free pole and internal stress; Magnetostatic energy and magnetoelastic energy are increased; And then steel disc inside produced a kind of new demagnetizing field, is in minimum steady state for making energy, can produce some new inferior magnetic domains; Be that pulsed electrical field annealing can refinement oriented silicon steel sheet magnetic domain, thereby reduce
Pa(unusual loss), so that reduce
P 17/50
Pulsed electrical field annealing improves magnetic strength
B 8 Reason: pulsed electrical field annealing makes has nearly { 110}<001>Grain-oriented large size crystal grain is annexed other assorted orientation small-size grains; Big crystal grain turns to closely { 110}<001>Orientation or { 110} far away<001>Orientation.Thereby influence { 110} < 001>orientation degree.
The present invention realizes as follows:
Oriented silicon steel sheet before handling is the cold-rolled orientation silicon steel sheet, and (massfraction %) is its chemical ingredients: C:0.01～0.05; Si:2.8～3.4; Mn:0.05～0.10; P:0.01～0.03; S:0.0015～0.03; Al:0.01～0.03.The pulsed electrical field annealing test adopts EPM-C type electric pulse generator; Lead directly is connected the two ends (lead adopts high temperature resistant, antioxidant stainless steel wire) of sample one side; Lead is protected by the high-purity corundum protective tube; In chamber type electric resistance furnace, anneal, and take protection of inert gas, outer cover graphite protective sleeve is to reduce oxidizing atmosphere in the stove as far as possible.The oriented silicon steel sheet by room temperature be raised to required annealing temperature (heat-up rate be 2.5 ℃/s), annealing temperature is 350 ℃ to 900 ℃; Pulse-repetition is 1 to 30Hz; The electricimpulse treatment time is 1 to 30min; Voltage is 400 to 2000V; Soaking time is 10min to 1h (the beginning section is the pulsed electrical field treatment time), then takes out air cooling to room temperature.
Advantage of the present invention is: (1) equipment, simple to operate.(2) amplitude of raising oriented silicon steel sheet magnetic property is big, and effect stability.(3) very little to oriented silicon steel sheet top coat impaired area.
Embodiment
Embodiment 1: when frequency be 9Hz, voltage be 500V, treatment time be 6min, when annealing temperature is 650 ℃.The oriented silicon steel sheet
P 17/50 Reduce by 13.18%, make it simultaneously
B 8 Increase 6.61%.
Embodiment 2: when frequency be 9Hz, voltage be 500V, treatment time be 3min, when annealing temperature is 650 ℃.The oriented silicon steel sheet
P 17/50 Reduce by 8.7%, make it simultaneously
B 8 Increase 5.15%.
Embodiment 3: when frequency be 15Hz, voltage be 500V, treatment time be 3min, when annealing temperature is 650 ℃.The oriented silicon steel sheet
P 17/50 Reduce by 1.84%, make it simultaneously
B 8 Increase 9.6%.
Claims (1)
1. one kind is passed through the method that pulsed electrical field thermal treatment improves the oriented silicon steel magnetic property, and said method steps is following: annealing test adopts EPM-C type electric pulse generator, and lead directly is connected the two ends of sample one side; Lead is annealed in chamber type electric resistance furnace, and is taked atmosphere protection by the protection of high-purity corundum protective tube; The oriented silicon steel sheet is raised to required annealing temperature by room temperature; The soaking time certain hour, during add pulsed electrical field and handle, then take out air cooling to room temperature;
In the above-mentioned steps, the heat-up rate of control oriented silicon steel sheet is that to make reducing atmosphere, annealing temperature interval be that 350 ℃ to 900 ℃, pulse-repetition are 1 to 30Hz for 2.5 ℃/s, argon shield+graphite sleeve; The electricimpulse treatment time is 1 to 30min; Voltage is 400 to 2000V; Soaking time is 10min to 1h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110009420 CN102127622B (en) | 2011-01-18 | 2011-01-18 | Method for improving magnetic characteristics of orientated silicon steel by heat treatment of pulse electric field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110009420 CN102127622B (en) | 2011-01-18 | 2011-01-18 | Method for improving magnetic characteristics of orientated silicon steel by heat treatment of pulse electric field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102127622A CN102127622A (en) | 2011-07-20 |
| CN102127622B true CN102127622B (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110009420 Expired - Fee Related CN102127622B (en) | 2011-01-18 | 2011-01-18 | Method for improving magnetic characteristics of orientated silicon steel by heat treatment of pulse electric field |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417961B (en) * | 2011-12-13 | 2013-10-16 | 北京科技大学 | Method for improving high silicon steel preparation process capability by utilizing high-energy electric pulse |
| KR101594598B1 (en) * | 2013-12-23 | 2016-02-16 | 주식회사 포스코 | Method for manufacturing the oriented electrical steel sheet |
| US11028470B2 (en) | 2017-01-27 | 2021-06-08 | Battelle Memorial Institute | Method for heat-treating metal materials |
| CN109182705B (en) * | 2018-10-24 | 2020-07-31 | 北京科技大学 | Method for rapidly preparing oriented thin strip electrical steel at room temperature by pulse current |
| CN115094493A (en) * | 2022-06-28 | 2022-09-23 | 无锡乐普金属科技有限公司 | Nickel plating process for stainless steel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665861A (en) * | 2009-09-27 | 2010-03-10 | 上海大学 | Method for preparing oriented silicon steel by pulse current recovery annealing |
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2011
- 2011-01-18 CN CN 201110009420 patent/CN102127622B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665861A (en) * | 2009-09-27 | 2010-03-10 | 上海大学 | Method for preparing oriented silicon steel by pulse current recovery annealing |
Non-Patent Citations (2)
| Title |
|---|
| C.M.B. Bacaltchuk et al..Effect of magnetic field applied during secondary annealing on texture and grain size of silicon steel.《Scripta Materialia》.2003,第48卷1343-1347. * |
| 沙玉辉等.磁场作用下取向硅钢薄带的再结晶织构.《东北大学学报(自然科学版)》.2004,第25卷(第7期),665-667. * |
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| CN102127622A (en) | 2011-07-20 |
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