CN103882203A - Hot rolling method for improving electromagnetic performance of silicon steel - Google Patents
Hot rolling method for improving electromagnetic performance of silicon steel Download PDFInfo
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- CN103882203A CN103882203A CN201210559530.0A CN201210559530A CN103882203A CN 103882203 A CN103882203 A CN 103882203A CN 201210559530 A CN201210559530 A CN 201210559530A CN 103882203 A CN103882203 A CN 103882203A
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- electromagnetic performance
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Abstract
The invention discloses a hot rolling method for improving the electromagnetic performance of silicon steel. The method comprises the following steps: arranging a heat-insulation hood with a heating function on a blank conveying roller way between the rough rolling process and the finishing rolling process, when the temperature reaches 950 to 1180 DEG C, subjecting the silicon steel to a finishing rolling process, and controlling the temperature above 840 DEG C during the finish rolling process so as to eliminate the head-tail electromagnetic performance fluctuation of finished steel belt due to the temperature difference between the head part and tail part of the middle blank. The hot rolling method can eliminate the electromagnetic stirring step in the continuous casting process. Moreover through increasing the heating temperature of slabs, the hot rolling method can replace the conventional chemical process to produce a series of high efficient electrical steels, and improves the competitiveness of the products.
Description
Technical field
The present invention relates to a kind of hot-rolling method that improves silicon steel electromagnetic performance.
Background technology
Cold rolled silicon steel, in hot-rolled process is produced, enters after roughing before finish rolling, usually wishes that the intermediate blank global tissue after roughing is even, and head and tail temperature is poor little, to obtaining good electromagnetic performance.During existing hot-rolled process is produced, intermediate blank surface and heart portion temperature usually differ 150 ℃ of left and right, enter the normal Insulation that adopts before finishing mill through rollgang, to guarantee temperature homogeneous microstructure, because of the time short, effect is limited.And need corresponding raising Heating temperature for improving final rolling temperature, cause two-phase solid solution in steel, affect product electromagnetic performance; And in relatively " low-temperature heat ", suitably control intermediate blank temperature and can reach and promote two-phase particle separate out and assemble alligatoring, improve the finished product electromagnetic performance.
In prior art, there is no significantly to make the means of two-phase particle coarsening in course of hot rolling.Just between roughing and finish rolling, intermediate blank short stay promotes two-phase particle to become large alligatoring.If the residence time is oversize, slab calorific loss on roller-way is more, can not guarantee final rolling temperature.Time, too short two-phase particle can not become large alligatoring.
Summary of the invention
Technical problem to be solved by this invention is on existing hot-rolled process production basis, and a kind of excellent electromagnetic performance hot-rolling method that obtains is provided, and plays Quick uniform intermediate blank temperature and reaches microstructure homogenization; Meanwhile, avoided the anxiety of the roughing ability that the technical measures of " low-temperature heat prevents two-phase solid solution " bring.
The technical program is applicable to conventional hot rolling unit and produces high performance silicon product made from steel.The technological process of production is: smelts, and continuous casting, heating of plate blank, roughing, finish rolling, laminar flow is cooling, cold rolling, connects and moves back.
Improve a hot-rolling method for silicon steel electromagnetic performance, set up the stay-warm case that possesses heating function on intermediate blank rollgang between roughing and finish rolling, object is that control intermediate blank temperature is even, and enters finish rolling between 950 ~ 1180 ℃.
The present invention controls two-phase particle in steel to separate out, assemble, grow up; Make intermediate blank limit portion temperature improve 30 ~ 80 ℃, thereby it is even to reach whole board briquette, and can further improve finish rolling finishing temperature by the temperature of controlling intermediate blank.
In order to obtain better effect, enter after finish rolling, control finish rolling finishing temperature and be greater than 840 ℃.
Constantly there is recrystallize completing in the operation of rolling after ferrite transformation in steel.Recrystallize all can occur in the time that temperature is greater than 650 ℃, but the higher recrystallize speed of temperature is fast.Because hot rolling adopts multi-frame tandem rolling; between each passage the recrystallize time shorter, so only just can make recrystallize complete fully, reduce deformed grains ratio at higher temperature; obtain the coils of hot-rolled steel of good recrystallized structure, thus the required normalizing operation of high efficiency products after substituting.
In the time that hot rolled strip is produced silicon steel, eliminate the finished product steel belt electromagnetic performance fluctuation end to end causing due to intermediate blank head and tail temperature difference by this technical scheme; The enforcement of this technology, can cancel induction stirring at continuous casting working procedure, and by increasing slab heating temperature, the alternative normalizing chemical industry of the enforcement order of these technical measures is produced electrical steel high efficiency series product, improves product market competition ability.
Embodiment
Embodiment smelting component is as following table:
Smelting component
| C | Si | Mn | P | S | N | Als |
| 0.0030 | 1.82 | 0.19 | 0.011 | 0.0041 | 0.0018 | 0.35 |
All the other are iron and uncontrollable residual element, slab thickness specification 230mm.
Implement the present invention and set up the stay-warm case that possesses heating function on the intermediate blank rollgang between roughing and finish rolling; tapping temperature is controlled at 1100 ℃ of left and right; base surface temperature enters finish rolling at 1080 ℃; 900 ℃ of finishing temperatures; other technique is constant; after hot rolling, do not make a practice of, obtain product electromagnetic performance as follows:
| Iron loss, W/kg | Magnetic strength, T | |
| Before enforcement | 4.11 | 1.68 |
| After enforcement | 3.58 | 1.72 |
Implement after this technology, product electromagnetic performance reaches high efficiency products performance index, and the logical volume of product electromagnetic performance is stable, and surface quality is good.
Claims (2)
1. a hot-rolling method that improves silicon steel electromagnetic performance, is characterized in that: on intermediate blank rollgang between roughing and finish rolling, set up the stay-warm case that possesses heating function, and enter finish rolling between 950 ~ 1180 ℃.
2. the hot-rolling method of raising silicon steel electromagnetic performance according to claim 1, is characterized in that: enter after finish rolling, control finish rolling finishing temperature and be greater than 840 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210559530.0A CN103882203A (en) | 2012-12-21 | 2012-12-21 | Hot rolling method for improving electromagnetic performance of silicon steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210559530.0A CN103882203A (en) | 2012-12-21 | 2012-12-21 | Hot rolling method for improving electromagnetic performance of silicon steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103882203A true CN103882203A (en) | 2014-06-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210559530.0A Pending CN103882203A (en) | 2012-12-21 | 2012-12-21 | Hot rolling method for improving electromagnetic performance of silicon steel |
Country Status (1)
| Country | Link |
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| CN (1) | CN103882203A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001172719A (en) * | 1999-12-13 | 2001-06-26 | Nippon Steel Corp | Method for producing nonoriented silicon steel sheet excellent in magnetic property |
| CN1483521A (en) * | 2002-09-19 | 2004-03-24 | 鞍钢集团新钢铁有限责任公司 | Method for continuous casting, continuoccs rolling intermediate and thin sheet blanket |
| CN1743128A (en) * | 2005-09-29 | 2006-03-08 | 东北大学 | Method for producing oriented silicon steel band by direct rolling of continuous cast plate slab |
| CN2803549Y (en) * | 2005-04-05 | 2006-08-09 | 鞍山市润辉冶金设备制造有限公司 | Thermal insulation cover on transferring roller way of continuous casting and rolling set for hot rolled strips |
| CN1824816A (en) * | 2005-02-25 | 2006-08-30 | 宝钢集团上海梅山有限公司 | Steel for extended automobile crossbeam and mfg, method thereof |
| CN1840252A (en) * | 2005-03-28 | 2006-10-04 | 鞍钢集团新钢铁有限责任公司 | Production process of continuous-casting tandem-rolling coiled sheet of medium thick plate |
| CN1883835A (en) * | 2005-06-20 | 2006-12-27 | 中冶东方工程技术有限公司 | Method for producing coiled sheet by continuous casting and tandem rolling of regular slab |
| CN1958812A (en) * | 2005-10-31 | 2007-05-09 | 宝山钢铁股份有限公司 | Method for producing oriented silicon steel |
| CN101210297A (en) * | 2006-12-27 | 2008-07-02 | 鞍钢股份有限公司 | Method for preparing tropism silicon steel |
| CN102102141A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Hot rolling process for improving structural homogeneity of oriented silicon steel plate |
-
2012
- 2012-12-21 CN CN201210559530.0A patent/CN103882203A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001172719A (en) * | 1999-12-13 | 2001-06-26 | Nippon Steel Corp | Method for producing nonoriented silicon steel sheet excellent in magnetic property |
| CN1483521A (en) * | 2002-09-19 | 2004-03-24 | 鞍钢集团新钢铁有限责任公司 | Method for continuous casting, continuoccs rolling intermediate and thin sheet blanket |
| CN1824816A (en) * | 2005-02-25 | 2006-08-30 | 宝钢集团上海梅山有限公司 | Steel for extended automobile crossbeam and mfg, method thereof |
| CN1840252A (en) * | 2005-03-28 | 2006-10-04 | 鞍钢集团新钢铁有限责任公司 | Production process of continuous-casting tandem-rolling coiled sheet of medium thick plate |
| CN2803549Y (en) * | 2005-04-05 | 2006-08-09 | 鞍山市润辉冶金设备制造有限公司 | Thermal insulation cover on transferring roller way of continuous casting and rolling set for hot rolled strips |
| CN1883835A (en) * | 2005-06-20 | 2006-12-27 | 中冶东方工程技术有限公司 | Method for producing coiled sheet by continuous casting and tandem rolling of regular slab |
| CN1743128A (en) * | 2005-09-29 | 2006-03-08 | 东北大学 | Method for producing oriented silicon steel band by direct rolling of continuous cast plate slab |
| CN1958812A (en) * | 2005-10-31 | 2007-05-09 | 宝山钢铁股份有限公司 | Method for producing oriented silicon steel |
| CN101210297A (en) * | 2006-12-27 | 2008-07-02 | 鞍钢股份有限公司 | Method for preparing tropism silicon steel |
| CN102102141A (en) * | 2009-12-22 | 2011-06-22 | 鞍钢股份有限公司 | Hot rolling process for improving structural homogeneity of oriented silicon steel plate |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140625 |