CN107630186A - A kind of method for improving electrical steel product surface insulation characteristic - Google Patents
A kind of method for improving electrical steel product surface insulation characteristic Download PDFInfo
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- CN107630186A CN107630186A CN201610569965.1A CN201610569965A CN107630186A CN 107630186 A CN107630186 A CN 107630186A CN 201610569965 A CN201610569965 A CN 201610569965A CN 107630186 A CN107630186 A CN 107630186A
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- cold rolling
- rolling electric
- nitrogen
- nitride film
- electrical steel
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Abstract
The present invention relates to a kind of method for improving electrical steel product surface insulation characteristic, including:1) cold rolling electric band carries out nitrogen treatment to its surface, produces nitride film in the cooling procedure after completion crystallization and crystal grain are grown up；2) under original nitrogen and hydrogen mixture atmosphere state, pure ammonia is passed through, by activated nitrogen atom caused by ammonolysis craft and metal surface reaction until diffusing into metallic matrix；20~200s of nitriding time；3) data are detected as guidance using nitrogen content in stove, it is 50~2000ppm to control cold rolling electric belt surface nitrogen content；4) cold rolling electric belt surface nitride film thickness control is at 0.05~0.50 μm；5) it is transferred to follow-up coating process.The present invention further carries out surfaction to the cold rolling electric band after annealing, can greatly improve finished surface interface resistance, and ensure its environmental-protecting performance and other integrated performance index requirements on the basis of existing cold rolling electric production technology.
Description
Technical field
The present invention relates to technical field of electrical sheet production, more particularly to a kind of electrical steel product surface insulation characteristic that improves
Method.
Background technology
Cold rolling electric is wide variety of metal function soft magnetic materials, is manufactured in the iron core for serving as electromagnetic conversion carrier
In, to reduce eddy-current loss, electrical steel product surface need to scribble insulating coating；And require it with good insulating performance (layer
Between resistance value be the bigger the better) while, further meet process industrial art performance, reduce iron core fill-in ratio；As improve magnetic conductivity
Can, it is desirable to which coating gets over Bao Yuehao, also to ensure that it has environmental protection characteristic in addition (without to environmentally hazardous substance and heavy metal element)；
In modern steel integrated complex production process, cold rolling electrical steel product carries out specific painting generally after finished products
Coating, drying and the sintering of layer, to meet its application performance.Coat type is divided into organic coating, inorganic coating and half organic painting
Layer, carried out on the substrate after cold rolling electric is heat-treated with finished product, be coated, dry and sinter by straightening device,
Specific interface resistance performance is brought to meet surface insulation performance after matching somebody with somebody when chemical combination by coating itself is multi-component.
The content of the invention
The invention provides a kind of method for improving electrical steel product surface insulation characteristic, produced in existing cold rolling electric
On Process ba- sis, surfaction further is carried out to the cold rolling electric band after annealing, assembled watch surface layer can be greatly improved
Between resistance, and ensure its environmental-protecting performance and other integrated performance index requirements.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of method for improving electrical steel product surface insulation characteristic of the present invention, including:
1) cold rolling electric band is carried out at nitridation in the cooling procedure after completion crystallization and crystal grain are grown up to its surface
Reason, its surface is promoted to produce the nitride film with silicon, aluminium and other various ingredients；
2) it is 750~1000 DEG C to control temperature caused by nitride film, ensures nitriding heat power；Mixed in original nitrogen hydrogen
Under atmosphere state, 10%~50% pure ammonia is passed through, reacts straight by activated nitrogen atom caused by ammonolysis craft and metal surface
To diffusing into metallic matrix；Nitriding time is controlled in 20~200s；
3) data are detected as guidance using nitrogen content in stove, it is 50~2000ppm to control cold rolling electric belt surface nitrogen content；
4) cold rolling electric belt surface nitride film thickness control is at 0.05~0.50 μm；
5) it is transferred to follow-up coating process.
Compared with prior art, the beneficial effects of the invention are as follows：
For the method for the invention after specific implementation, the interface resistance value of cold rolling electric band generally improves 200~2000
Ω·mm2/ piece, the applicability of electrical steel product is improved, improve iron core manufacturing installation characteristic, core loss, meet
Interlayer is pressure-resistant and the requirement of the overall target such as environmentally friendly.
Embodiment
A kind of method for improving electrical steel product surface insulation characteristic, including:
1) cold rolling electric band is carried out at nitridation in the cooling procedure after completion crystallization and crystal grain are grown up to its surface
Reason, its surface is promoted to produce the nitride film with silicon, aluminium and other various ingredients；
2) it is 750~1000 DEG C to control temperature caused by nitride film, ensures nitriding heat power；Mixed in original nitrogen hydrogen
Under atmosphere state, 10%~50% pure ammonia is passed through, reacts straight by activated nitrogen atom caused by ammonolysis craft and metal surface
To diffusing into metallic matrix；Nitriding time is controlled in 20~200s；
3) data are detected as guidance using nitrogen content in stove, it is 50~2000ppm to control cold rolling electric belt surface nitrogen content；
4) cold rolling electric belt surface nitride film thickness control is at 0.05~0.50 μm；
5) it is transferred to follow-up coating process.
Following examples are implemented under premised on technical solution of the present invention, give 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
It is conventional method not mentionlet alone bright.
【Embodiment】
Exemplified by producing 50W310 (bulk composition as 2.82%Si, 0.43%Al) cold rolling electric band；In conventional use
Continuous annealing furnace in, control nitriding temperature at 910 DEG C；Atmosphere is integrally controlled as N2(58%)+H2(21%)+NH3(21%)；
By adjusting the unit operation speed control disposed of in its entirety time, it is 310ppm to detect data to control nitrogen content by nitrogen oxygen instrument；Nitrogen
It is 0.18 μm to change layer film thickness, and follow-up conventional production is carried out using general half organic coating.
Through examining, interface resistance of the cold rolling electric with finished product is worth more conventional production method and improves 450 Ω mm2/ piece.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (1)
- A kind of 1. method for improving electrical steel product surface insulation characteristic, it is characterised in that including:1) cold rolling electric band carries out nitrogen treatment to its surface, promoted in the cooling procedure after completion crystallization and crystal grain are grown up Enter its surface and produce the nitride film with silicon, aluminium and other various ingredients；2) it is 750~1000 DEG C to control temperature caused by nitride film, ensures nitriding heat power；In original nitrogen and hydrogen mixture atmosphere Under state, 10%~50% pure ammonia is passed through, by activated nitrogen atom caused by ammonolysis craft and metal surface reaction until expanding Dissipate and enter metallic matrix；Nitriding time is controlled in 20~200S；3) data are detected as guidance using nitrogen content in stove, it is 50~2000ppm to control cold rolling electric belt surface nitrogen content；4) cold rolling electric belt surface nitride film thickness control is at 0.05~0.50 μm；5) it is transferred to follow-up coating process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610569965.1A CN107630186A (en) | 2016-07-18 | 2016-07-18 | A kind of method for improving electrical steel product surface insulation characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610569965.1A CN107630186A (en) | 2016-07-18 | 2016-07-18 | A kind of method for improving electrical steel product surface insulation characteristic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107630186A true CN107630186A (en) | 2018-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610569965.1A Pending CN107630186A (en) | 2016-07-18 | 2016-07-18 | A kind of method for improving electrical steel product surface insulation characteristic |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348854A (en) * | 2008-09-05 | 2009-01-21 | 首钢总公司 | Method for producing oriented electrical steel by low temperature heating |
| CN101358273A (en) * | 2008-09-05 | 2009-02-04 | 首钢总公司 | Method for producing low-temperature oriented electrical steels |
| CN102127709A (en) * | 2011-01-16 | 2011-07-20 | 首钢总公司 | Low-temperature slab heating high magnetic induction grain-oriented silicon steel and production method thereof |
| CN103668005A (en) * | 2013-12-12 | 2014-03-26 | 武汉钢铁(集团)公司 | HiB steel produced at moderate slab heating temperature and production method thereof |
| CN103911545A (en) * | 2014-04-14 | 2014-07-09 | 国家电网公司 | Preparation method of electrical steel strip with strong goss texture occupation rate and high magnetic induction orientation |
-
2016
- 2016-07-18 CN CN201610569965.1A patent/CN107630186A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348854A (en) * | 2008-09-05 | 2009-01-21 | 首钢总公司 | Method for producing oriented electrical steel by low temperature heating |
| CN101358273A (en) * | 2008-09-05 | 2009-02-04 | 首钢总公司 | Method for producing low-temperature oriented electrical steels |
| CN102127709A (en) * | 2011-01-16 | 2011-07-20 | 首钢总公司 | Low-temperature slab heating high magnetic induction grain-oriented silicon steel and production method thereof |
| CN103668005A (en) * | 2013-12-12 | 2014-03-26 | 武汉钢铁(集团)公司 | HiB steel produced at moderate slab heating temperature and production method thereof |
| CN103911545A (en) * | 2014-04-14 | 2014-07-09 | 国家电网公司 | Preparation method of electrical steel strip with strong goss texture occupation rate and high magnetic induction orientation |
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Application publication date: 20180126 |