CN102899467A - Method for promoting thin strip of electrical steel to generate texture - Google Patents
Method for promoting thin strip of electrical steel to generate texture Download PDFInfo
- Publication number
- CN102899467A CN102899467A CN2012104082336A CN201210408233A CN102899467A CN 102899467 A CN102899467 A CN 102899467A CN 2012104082336 A CN2012104082336 A CN 2012104082336A CN 201210408233 A CN201210408233 A CN 201210408233A CN 102899467 A CN102899467 A CN 102899467A
- Authority
- CN
- China
- Prior art keywords
- electrical steel
- product
- thin strip
- protective atmosphere
- hydrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000001737 promoting effect Effects 0.000 title abstract description 3
- 230000002349 favourable effect Effects 0.000 claims abstract description 10
- 230000001681 protective effect Effects 0.000 claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000000137 annealing Methods 0.000 claims abstract description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 4
- 239000001257 hydrogen Substances 0.000 claims abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005204 segregation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Landscapes
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention provides a method for promoting the generation of favorable texture of an electrical steel thin strip, wherein the thickness specification of the thin strip product is less than or equal to 0.35mm, the annealing temperature is more than or equal to 850 ℃, and the method is characterized in that the annealing protective atmosphere of the finished product consists of 70-99% of hydrogen and/or nitrogen and 1-30% of hydrogen sulfide by volume percentage. The invention can eliminate the relative 'fine grain' structure of the surface layer of the electrical steel thin strip product, and the product is beneficial to improving the texture component and improving the electromagnetic performance of the product.
Description
Technical field
The invention belongs to the electrical steel production technical field, relate in particular to the control method that the favorable texture component generates in a kind of electrical steel strip heat treatment process.
Background technology
Electrical steel product is widely used in the every field of the national economic development, product is progressively to thin silicon Cultivar development with a high standard, the thickness specification is successively decreased 0.30mm, 0.25mm, 0.20mm, 0.15mm until the strip in razor-thin kind satisfies every profession and trade " high-grade, precision and advanced " production development and energy-saving and cost-reducing demand from 0.35mm.The structure type of the functional and crystal of electrical steel product is closely related, usually according to favorable texture components such as different the Control of the aim products (100), (110), and according to the corresponding large grain-size of overall performance requirement acquisition.
The formation of electrical steel strip tissue relates to each the parameter control in the heat treatment process, and temperature, speed, protective atmosphere, tension force etc. all become effective adjustment means.
The present invention is directed to the atmosphere adjustment in the heat treatment process, in the hope of obtaining excellent microtexture and crystal structure types.
Summary of the invention
The object of the invention is to, produce for the electrical steel strip, in thermal treatment, carry out atmosphere adjustment and control, improve product surface microtexture surface energy state by atmosphere, promote the favorable texture component to produce, be conducive to simultaneously corresponding large crystal grain organizational controls, the final electromagnetic performance that obtains excellence.
The present invention realizes like this; this promotes the thickness specification≤0.35mm of the described strip product of method that electrical steel strip favorable texture generates; its annealing temperature 〉=850 ℃ it is characterized in that the finished products protective atmosphere is by 70%～99% hydrogen and/or nitrogen, and 1%～30% hydrogen sulfide form.
Finished products protective atmosphere of the present invention is that also should to add dew point be 10～60 ℃ water vapor for the purpose that reaches decarburization.
Because grain growth in the Thin Strip Steel product heat treatment process is affected by the surface energy state, and there is " heat channel groove " effect constraint grain growth, therefore technical solution of the present invention is applicable to electrical steel product thickness specification 0.35mm and following specification product thereof, reduce with product thickness, because increase with the atmosphere contact surface area, this scheme effect is more obvious; Under heat-treat condition hydrogen sulfide adsorption production surface or with the product surface reaction, improve different texture component energy levels, energy state, and can between crystal, produce certain Grain Boundary Segregation near the skin section position; In the above described manner, adjust (100), (110) texture component surface energy, impel favourable component production, simultaneously, in view of this type of atmosphere and isolate thereof in surperficial crystal boundary exposure portion segregation, promote that crystal boundary moves grain growth.
Technical solution of the present invention finished products protective atmosphere is by 70%～99% hydrogen and/or nitrogen; and 1%～30% hydrogen sulfide forms; reduce surface (100) grain surface energy; promoting this type of to organize preferentially grows up; and by exposing the grain boundaries segregation; eliminate surface " heat channel groove " effect, promote that crystal boundary moves grain growth.
Relative " thin brilliant " tissue in top layer that adopted electrical steel strip product eliminates of the present invention, product favorable texture component is promoted, and the product electromagnetic performance is improved.
Embodiment
The present invention is further illustrated below by embodiment.
The chemical component weight per-cent of embodiment of the invention electrical steel is: C:0.002%, and Si:2.25%, Mn:0.26%, P:0.013%, S:0.004%, Als:0.25%, all the other are iron and inevitable impurity element.Through smelting, continuous casting is cold-rolled to the different thickness finished product after the hot rolling, 930 ℃ of annealing temperatures, and concrete protective atmosphere and effect see Table 1.
The concrete protective atmosphere of table 1 embodiment of the invention and effect
Claims (2)
1. method that promotes that electrical steel strip favorable texture generates; thickness specification≤the 0.35mm of described strip product; its annealing temperature 〉=850 ℃ it is characterized in that the finished products protective atmosphere is by by volume hydrogen and/or the nitrogen of per-cent meter 70%～99%, and 1%～30% hydrogen sulfide form.
2. the method that generates of promotion electrical steel strip favorable texture according to claim 1 is characterized in that it is 10～60 ℃ water vapor that the finished products protective atmosphere also contains dew point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104082336A CN102899467A (en) | 2012-10-23 | 2012-10-23 | Method for promoting thin strip of electrical steel to generate texture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104082336A CN102899467A (en) | 2012-10-23 | 2012-10-23 | Method for promoting thin strip of electrical steel to generate texture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102899467A true CN102899467A (en) | 2013-01-30 |
Family
ID=47571952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104082336A Pending CN102899467A (en) | 2012-10-23 | 2012-10-23 | Method for promoting thin strip of electrical steel to generate texture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102899467A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5350008A (en) * | 1976-10-19 | 1978-05-08 | Kawasaki Steel Co | Manufacturing of single anesotropic silicon steel sheets with high magnetic flux density |
| JPS5827953A (en) * | 1981-08-14 | 1983-02-18 | Matsushita Electric Ind Co Ltd | Anisotropic silicon steel strip and its manufacture |
| CN101768697A (en) * | 2008-12-31 | 2010-07-07 | 宝山钢铁股份有限公司 | Method for manufacturing oriented silicon steel with one-step cold rolling method |
-
2012
- 2012-10-23 CN CN2012104082336A patent/CN102899467A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5350008A (en) * | 1976-10-19 | 1978-05-08 | Kawasaki Steel Co | Manufacturing of single anesotropic silicon steel sheets with high magnetic flux density |
| JPS5827953A (en) * | 1981-08-14 | 1983-02-18 | Matsushita Electric Ind Co Ltd | Anisotropic silicon steel strip and its manufacture |
| CN101768697A (en) * | 2008-12-31 | 2010-07-07 | 宝山钢铁股份有限公司 | Method for manufacturing oriented silicon steel with one-step cold rolling method |
Non-Patent Citations (1)
| Title |
|---|
| 高秀华等: "无取向硅钢薄带的开发", 《钢铁》 * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130130 |