CN107630134B - A method of improving cold rolling electrical steel product interface resistance - Google Patents
A method of improving cold rolling electrical steel product interface resistance Download PDFInfo
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- CN107630134B CN107630134B CN201610569365.5A CN201610569365A CN107630134B CN 107630134 B CN107630134 B CN 107630134B CN 201610569365 A CN201610569365 A CN 201610569365A CN 107630134 B CN107630134 B CN 107630134B
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- interface resistance
- oxidation
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Abstract
The present invention relates to a kind of methods for improving cold rolling electrical steel product interface resistance, comprising: 1) in the cooling procedure after cold rolling electric band completes crystallization and crystal grain is grown up, carries out controllability oxidation processes to its surface；Controllability oxidation processes mode selects nitrogen injection or the air blown type of cooling, and when nitrogen injection controls moisture, controls 0~60 DEG C of nitrogen dew point；The temperature and cold rolling electric surface oxygen content, oxide film thickness that control oxide generates；2) the cold rolling electric band after controllability oxidation processes is transferred to subsequent conventional production process.The present invention achievees the purpose that greatly improve finished surface interface resistance, guarantees its environmental protection and integrated performance index requirement by carrying out surfaction to cold rolling electric steel band after annealing.
Description
Technical field
The present invention relates to technical field of electrical sheet production more particularly to a kind of improve cold rolling electrical steel product interface resistance
Method.
Background technique
Cold rolling electric is widely applied metal function soft magnetic materials, in the iron core manufacture for serving as electromagnetic conversion carrier
In, need electrical steel product surface to be coated with insulating coating to reduce eddy-current loss, it is desirable that it is with good insulating performance (interlayer electricity
Resistance value is the bigger the better) outside, further satisfaction process industrial art performance and reduce its iron core fill-in ratio (to improve magnetic property, it is desirable that
Coating gets over Bao Yuehao), while also to guarantee its environmental protection characteristic (without to environmentally hazardous substance and heavy metal element).
At present in cold rolling electric production process, the coating of specific coating is usually carried out after cold rolling electric annealing, is dried
Dry and sintering, satisfaction and application performance.Coat type is divided into organic coating, inorganic coating and half organic coating, in cold rolling electricity
After the heat treatment of work finished steel sheet, plater is carried out on substrate and applied, dried and is sintered, by coating itself multicomponent
With bringing specific interface resistance performance to meet surface insulation performance after when chemical combination.But the surface of cold rolling electric finished product
Interface resistance is unable to reach perfect condition, limits the application of the product to a certain extent.
Summary of the invention
The present invention provides a kind of methods for improving cold rolling electrical steel product interface resistance, by cold rolling after annealing
Electrical sheet steel band carries out surfaction, reaches and greatly improves finished surface interface resistance, guarantees its environmental protection and integrated performance index
It is required that purpose.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A method of improving cold rolling electrical steel product interface resistance, comprising:
1) in the cooling procedure after cold rolling electric band completes crystallization and crystal grain is grown up, controllability oxygen is carried out to its surface
Change processing；
Controllability oxidation processes mode selects nitrogen injection or the air blown type of cooling, and when nitrogen injection controls moisture,
0~60 DEG C of nitrogen dew point of control；
The temperature that control oxide generates is 900~100 DEG C；Optimum temperature controls is for cooling procedure after annealing temperature
700~150 DEG C；
After controllability oxidation, cold rolling electric belt surface generates 2FeOSiO2Or with iron, silicon, aluminum oxide it is polynary
Component iron scale；
It is guidance with oxygen content detection data in furnace, control cold rolling electric surface oxygen content is 50~5000ppm；
Cold rolling electric surface oxidation plastics thickness control is at 0.05~0.50 μm；
2) the cold rolling electric band after controllability oxidation processes is transferred to subsequent conventional production process.
Compared with prior art, the beneficial effects of the present invention are:
After being handled using the method for the invention, the interface resistance value of cold rolling electrical steel product generally improves 300~3000
Ω·mm2/ piece improves the applicability of electrical steel product, and it is resistance to meet iron core manufacturing installation characteristic, core loss, interlayer
The comprehensive performances requirement such as pressure and environmental protection.
Specific embodiment
A kind of method improving cold rolling electrical steel product interface resistance of the present invention, comprising:
1) in the cooling procedure after cold rolling electric band completes crystallization and crystal grain is grown up, controllability oxygen is carried out to its surface
Change processing；
Controllability oxidation processes mode selects nitrogen injection or the air blown type of cooling, and when nitrogen injection controls moisture,
0~60 DEG C of nitrogen dew point of control；
The temperature that control oxide generates is 900~100 DEG C；Optimum temperature controls is for cooling procedure after annealing temperature
700~150 DEG C；
After controllability oxidation, cold rolling electric belt surface generates 2FeOSiO2Or with iron, silicon, aluminum oxide it is polynary
Component iron scale；
It is guidance with oxygen content detection data in furnace, control cold rolling electric surface oxygen content is 50~5000ppm；
Cold rolling electric surface oxidation plastics thickness control is at 0.05~0.50 μm；
2) the cold rolling electric band after controllability oxidation processes is transferred to subsequent conventional production process.
Following embodiment is implemented under the premise of the technical scheme of the present invention, gives detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
Not mentionleting alone bright is conventional method.
[embodiment]
For producing 50W600 (subject highlighting, which studies, is divided into 1.25%Si, 0.26%Al).
Using multi-functional continuous annealing unit RJC (nitrogen circulation blowing cooling) cooling device；Cold rolling electrician after annealing
During steel temperature of steel strips is down to room temperature by 780 DEG C；Moisture is controlled, -50 DEG C of nitrogen dew point in conventional production is changed to 15
℃；
Control cold rolling electric steel strip surface oxygen content is 530ppm, and oxidated layer thickness is 0.13 μm, using general half
Organic coating carries out subsequent conventional production；The interface resistance value for being detected cold rolling electrical steel product improves 480 Ω mm2/ piece.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (1)
1. a kind of method for improving cold rolling electrical steel product interface resistance characterized by comprising
1) in the cooling procedure after cold rolling electric band completes crystallization and crystal grain is grown up, its surface is carried out at controllability oxidation
Reason；
Controllability oxidation processes mode selects nitrogen injection or the air blown type of cooling, and when nitrogen injection controls moisture, controls
0~60 DEG C of nitrogen dew point；
The temperature that control oxide generates is 900~100 DEG C；
After controllability oxidation, cold rolling electric belt surface generates 2FeOSiO2Or with iron, silicon, aluminum oxide multicomponent mixture
Iron scale；
It is guidance with oxygen content detection data in furnace, control cold rolling electric surface oxygen content is 50~5000ppm；
Cold rolling electric surface oxidation plastics thickness control is at 0.05~0.50 μm；
2) the cold rolling electric band after controllability oxidation processes is transferred to subsequent conventional production process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610569365.5A CN107630134B (en) | 2016-07-18 | 2016-07-18 | A method of improving cold rolling electrical steel product interface resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610569365.5A CN107630134B (en) | 2016-07-18 | 2016-07-18 | A method of improving cold rolling electrical steel product interface resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107630134A CN107630134A (en) | 2018-01-26 |
| CN107630134B true CN107630134B (en) | 2019-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610569365.5A Active CN107630134B (en) | 2016-07-18 | 2016-07-18 | A method of improving cold rolling electrical steel product interface resistance |
Country Status (1)
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| CN (1) | CN107630134B (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103882193B (en) * | 2012-12-21 | 2016-05-04 | 鞍钢股份有限公司 | A kind of cold rolling non-oriented electrical steel method for annealing of outer oxide |
| CN103882191B (en) * | 2012-12-21 | 2015-11-18 | 鞍钢股份有限公司 | A kind of method for annealing of full nitrogen production cold rolling non-oriented electrical steel |
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2016
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