CN102220466A - Method for producing semi-processed cold-rolled non-oriented electrical steel - Google Patents
Method for producing semi-processed cold-rolled non-oriented electrical steel Download PDFInfo
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- CN102220466A CN102220466A CN2011101137281A CN201110113728A CN102220466A CN 102220466 A CN102220466 A CN 102220466A CN 2011101137281 A CN2011101137281 A CN 2011101137281A CN 201110113728 A CN201110113728 A CN 201110113728A CN 102220466 A CN102220466 A CN 102220466A
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Abstract
The invention relates to a method for producing semi-processed cold-rolled non-oriented electrical steel, which comprises the steps of pickling, rolling, electrolytically degreasing, annealing and leveling of non-oriented hot-rolled silicon steel, wherein annealing is performed in a full-hydrogen bell-type annealing furnace by first heating to 730 to 820 DEG C within 10 hours, then recrystallizing and annealing for more than 12 hours at 730 to 820 DEG C, next slowly cooling to 600 to 500 DEG C, later on cooling in a cooling cover to 80 to 60 DEG C and finally discharging. In the semi-processed non-oriented cold-rolled electrical steel with a mark of 50WB800 produced by the invention, the product magnetism is characterized in that: the P1.5/50 is 7.181W/kg; and the B5000 is 1.708T. Compared with the requirements of corresponding standards of the common semi-processed cold-rolled non-oriented electrical steel, the iron loss value is reduced by 0.819W/kg, and the magnetic induction is improved by 0.008T. As a material for iron cores of motors and generators working in rotary magnetic fields, the semi-processed cold-rolled non-oriented electrical steel produced by the method has high magnetic performance and technical performance.
Description
Technical field
The present invention relates to the production method of a kind of motor core with electrical steel, is the method that a kind of bell type annealing furnace is produced high magnetic strength, the low non-oriented electrical steel of iron loss specifically.
Background technology
Cold rolling non-oriented electrical steel has good magnetic performance and processing performance as the electric motor and the generator rotor core material of working in rotatingfield, be indispensable important non-retentive alloy in electric power, electronics and the war industry.
Produce the method for non-oriented electrical steel at present, all adopt continuous annealing process production, build the continuous annealing production line investment greatly, floor space is big.The physicals of product will be annealed under comparatively high temps after user's punching though can guarantee to dispatch from the factory, and could obtain the magnetic of regulation, and will adopt decarbonization process that carbon is taken off to prescribed value, otherwise just magnetic aging be arranged.Even stress relief annealing under comparatively high temps not only is easy to generate interior problem of oxidation, and core loss value is higher, be difficult to satisfy the requirement that electronic product constantly develops towards miniaturization, high magnetic strength, low iron loss direction.
Because cold rolling electric requires very strict to magnetic property and plate shape, therefore in the cold rolling non-oriented electrical steel production process, the control of annealing temperature rise rate, the control of annealing soaking time, the control of annealing rate of cooling and time control, product thickness control are difficult points, easily cause the magnetic property and the poor dimensional precision of product, cause the client to use.
Summary of the invention
The production method that the purpose of this invention is to provide a kind of non-oriented electrical steel.
The technical scheme that the present invention takes is:
A kind of production method of non-oriented electrical steel, comprise and not have the pickling of orientation hot rolled silicon steel, rolling, electrolytic degreasing, annealing and smooth step, described annealing is carried out in full-hydrogen hood-type annealing furnace, be warming up to 730～820 ℃ earlier, heating-up time was controlled in 10 hours, under these 730～820 ℃ of temperature, more than recrystallization annealing 12h hour, slowly be cooled to 600～500 ℃ then, add cooling cowl again and be cooled to 80～60 ℃ and come out of the stove.
The plug-type pickling technology of described pickling utilization shallow slot turbulent flow, the temperature of first step acid tank acid solution is controlled at 80～90 ℃, and the temperature of last step acid tank acid solution is controlled at 60～70 ℃, and the concentration of acid solution is controlled at 160～200g/L.
Described rolling usefulness six roller HC milling trains, cold roller and deformed rate 〉=80%.
Described smooth elongation control is 0.5～3%.
The described nothing orientation preferred chemical constitution of hot rolled silicon steel (wt%) is: C: Si≤0.01% :≤1.00%, Mn:0.20～1.20%, P≤0.15%, S≤0.02%, all the other are iron and unavoidable impurities.
The present invention prevents to produce the oxidation tint defective by control annealing temperature rise rate, annealing soaking time, annealing rate of cooling and time, product thickness, guarantees magnetic property; By the control of rolling pre-allowance, promptly set the pre-allowance of rational thickness at rolling extreme trace, adjust the skin pass rolling force parameter in smooth operation according to supplied materials thickness, guarantee the thickness control accuracy of product, obtain required magnetic.If adopt continuous annealing process, adopt decarbonization process that carbon is taken off to prescribed value, otherwise magnetic aging is just arranged, cause core loss value higher, and the present invention adopts bell type annealing furnace to anneal, carry out the above recrystallization annealing of 12h under 730～820 ℃ of temperature, and further improve plate shape after 0.5～3% unit elongation is smooth, physicals reaches standard-required.
The cold rolling non-oriented electrical steel of the present invention's preparation has the following advantages:
1, the cold rolling non-oriented electrical steel production cost is low, and product performance, surface quality, strip shape quality and dimensional precision reach standard-required and stable.
2, the trade mark of the present invention's production is that 50WB800, thickness are the half-technique non oriented cold rolling electric of 0.5mm, and product magnetic can reach: P1.5/50:7.181W/kg, B5000:1.708T.With the corresponding standard-required contrast of common non-oriented electrical steel at present, core loss value reduces 0.819W/kg, and magnetic strength improves 0.008T.
3, cold rolling non-oriented electrical steel of the present invention has good magnetic performance and processing performance as the electric motor and the generator core material of working in rotatingfield.Compare with the motor core that common cold rolling non-oriented electrical steel is made, can dwindle motor size, weight reduction reduces copper loss, reduces power consumption, improves running efficiency.
Description of drawings
Fig. 1 produces orientation-free cold-rolled electrical steel technical process for adopting continuous annealing and coating unit;
Fig. 2 is orientation-free cold-rolled electrical steel technical process for the present invention produces.
Embodiment
Embodiment 1
The production stage of non-oriented electrical steel is:
(1) pickling: with the trade mark is the plug-type pickling technology of the nothing orientation hot rolled silicon steel band utilization shallow slot turbulent flow pickling of W600, and the temperature of first step acid tank acid solution is controlled at 80 ℃, and the temperature of last step acid tank acid solution is controlled at 60 ℃, and the concentration of acid solution is controlled at 160g/L.
(2) rolling: the steel band after the pickling rolls through six roller HC milling trains sets thickness, and cold roller and deformed rate is 〉=80%, passes through to set reasonably pre-allowance at rolling extreme trace, improves thickness control accuracy.
(3) electrolytic degreasing:
Steel band after rolling is removed surperficial grease and iron powder etc. through the electrolytic degreasing unit.
(4) annealing:
Steel band after the degreasing is annealed in full-hydrogen hood-type annealing furnace, and the heating-up time was controlled in 10 hours, carries out recrystallization annealing more than 12h hour under 820 ℃ of temperature, slowly is cooled to be with cooling cowl to be cooled to 80 ℃ after 600 ℃ and comes out of the stove.
(5) smooth and finishing:
Steel band after the annealing carries out smooth with 2～3% drafts, and adjusts skin pass rolling power according to supplied materials thickness, makes its thickness and precision reach customer requirement.Steel band after smooth is packed warehouse-in after the side cut of finishing unit, oiling, quality inspection.
Embodiment 2
The production stage of non-oriented electrical steel is:
(1) pickling: with the trade mark is the plug-type pickling technology of the nothing orientation hot rolled silicon steel band utilization shallow slot turbulent flow pickling of W800, and the temperature of first step acid tank acid solution is controlled at 90 ℃, and the temperature of last step acid tank acid solution is controlled at 70 ℃, and acid strength is controlled at 200g/L.
(2) rolling: the steel band after the pickling rolls through six roller HC milling trains sets thickness, and cold roller and deformed rate is 〉=80%, passes through to set reasonably pre-allowance at rolling extreme trace, improves thickness control accuracy.
(3) electrolytic degreasing:
Steel band after rolling is removed surperficial grease and iron powder etc. through the electrolytic degreasing unit.
(4) annealing:
Steel band after the degreasing is annealed in full-hydrogen hood-type annealing furnace, and the heating-up time was controlled in 10 hours, carries out recrystallization annealing more than 12h hour under 730 ℃ of temperature, slowly is cooled to be with cooling cowl to be cooled to 60 ℃ after 550 ℃ and comes out of the stove.
(5) smooth and finishing:
Steel band after the annealing carries out smooth with 0.5～2% draft, and adjusts skin pass rolling power according to supplied materials thickness, makes its thickness and precision reach customer requirement.Steel band after smooth is packed warehouse-in after the side cut of finishing unit, oiling, quality inspection.
Embodiment 3
The production of non-oriented electrical steel, step (4) annealing:
Steel band after the degreasing is annealed in full-hydrogen hood-type annealing furnace, and the heating-up time was controlled in 10 hours, carries out recrystallization annealing more than 12h hour under 780 ℃ of temperature, slowly is cooled to be with cooling cowl to be cooled to 80 ℃ after 500 ℃ and comes out of the stove; Other steps are with embodiment 1.
Embodiment 4
The production of non-oriented electrical steel, step (4) annealing:
Steel band after the degreasing is annealed in full-hydrogen hood-type annealing furnace, and the heating-up time was controlled in 10 hours, carries out recrystallization annealing more than 12h hour under 750 ℃ of temperature, slowly is cooled to be with cooling cowl to be cooled to 70 ℃ after 580 ℃ and comes out of the stove; Other steps are with embodiment 1.
Claims (5)
1. the production method of a non-oriented electrical steel, comprise and not have the pickling of orientation hot rolled silicon steel, rolling, electrolytic degreasing, annealing and smooth step, it is characterized in that, described annealing is carried out in full-hydrogen hood-type annealing furnace, be warming up to 730～820 ℃ earlier, the heating-up time was controlled in 10 hours, under these 730～820 ℃ of temperature more than recrystallization annealing 12h hour, slowly be cooled to 600～500 ℃ then, add cooling cowl again and be cooled to 80～60 ℃ and come out of the stove.
2. the production method of non-oriented electrical steel according to claim 1, it is characterized in that, the plug-type pickling technology of described pickling utilization shallow slot turbulent flow, the temperature of first step acid tank acid solution is controlled at 80～90 ℃, the temperature of last step acid tank acid solution is controlled at 60～70 ℃, and the concentration of acid solution is controlled at 160～200g/L.
3. the production method of non-oriented electrical steel according to claim 1 is characterized in that, described rolling usefulness six roller HC milling trains, cold roller and deformed rate 〉=80%.
4. the production method of non-oriented electrical steel according to claim 1 is characterized in that, described smooth, elongation control is 0.5～3%.
5. the production method of non-oriented electrical steel according to claim 1, it is characterized in that, described nothing orientation hot rolled silicon steel chemical constitution is: C: Si≤0.01% :≤1.00%, Mn:0.20～1.20%, P≤0.15%, S≤0.02%, all the other are iron and impurity.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102794301A (en) * | 2012-08-03 | 2012-11-28 | 莱芜市泰山冷轧板有限公司 | Manufacture method of cold-rolled electrolytic tin substrate |
| CN102828018A (en) * | 2012-09-27 | 2012-12-19 | 鞍钢股份有限公司 | Method for improving production efficiency of cover-type furnace and saving energy |
| CN103031421A (en) * | 2011-09-29 | 2013-04-10 | 鞍钢股份有限公司 | Production method of non-oriented electrical steel coating semi-processed product |
| CN103233099A (en) * | 2013-05-08 | 2013-08-07 | 南通长江电器实业有限公司 | High-temperature annealing process for stators |
| CN103695755A (en) * | 2013-11-28 | 2014-04-02 | 安徽银力铸造有限公司 | Preparation method of electrical steel for automobile motor |
| CN104195426A (en) * | 2014-03-26 | 2014-12-10 | 浙江龙盛薄板有限公司 | Semi-processed non-oriented silicon steel and manufacturing method thereof |
| CN106424195A (en) * | 2016-12-01 | 2017-02-22 | 浙江东南金属薄板有限公司 | Cold-rolling strip steel production process |
| CN107630131A (en) * | 2016-07-18 | 2018-01-26 | 鞍钢股份有限公司 | One kind improves the anisotropic production method of electrical steel product electromagnetic performance |
| CN113005264A (en) * | 2021-02-20 | 2021-06-22 | 包头市威丰稀土电磁材料股份有限公司 | Oriented silicon steel magnetic field annealing process |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103031421A (en) * | 2011-09-29 | 2013-04-10 | 鞍钢股份有限公司 | Production method of non-oriented electrical steel coating semi-processed product |
| CN103031421B (en) * | 2011-09-29 | 2015-11-25 | 鞍钢股份有限公司 | A kind of production method of non-oriented electrical steel coated semi handicraft product |
| CN102794301B (en) * | 2012-08-03 | 2014-07-09 | 莱芜市泰山冷轧板有限公司 | Manufacture method of cold-rolled electrolytic tin substrate |
| CN102794301A (en) * | 2012-08-03 | 2012-11-28 | 莱芜市泰山冷轧板有限公司 | Manufacture method of cold-rolled electrolytic tin substrate |
| CN102828018A (en) * | 2012-09-27 | 2012-12-19 | 鞍钢股份有限公司 | Method for improving production efficiency of cover-type furnace and saving energy |
| CN103233099A (en) * | 2013-05-08 | 2013-08-07 | 南通长江电器实业有限公司 | High-temperature annealing process for stators |
| CN103695755B (en) * | 2013-11-28 | 2016-03-09 | 安徽银力铸造有限公司 | A kind of preparation method of electrical steel for automobile motor |
| CN103695755A (en) * | 2013-11-28 | 2014-04-02 | 安徽银力铸造有限公司 | Preparation method of electrical steel for automobile motor |
| CN104195426A (en) * | 2014-03-26 | 2014-12-10 | 浙江龙盛薄板有限公司 | Semi-processed non-oriented silicon steel and manufacturing method thereof |
| CN104195426B (en) * | 2014-03-26 | 2017-02-15 | 浙江龙盛薄板有限公司 | Semi-processed non-oriented silicon steel and manufacturing method thereof |
| CN107630131A (en) * | 2016-07-18 | 2018-01-26 | 鞍钢股份有限公司 | One kind improves the anisotropic production method of electrical steel product electromagnetic performance |
| CN107630131B (en) * | 2016-07-18 | 2019-05-31 | 鞍钢股份有限公司 | A kind of anisotropic production method of improvement electrical steel product electromagnetic performance |
| CN106424195A (en) * | 2016-12-01 | 2017-02-22 | 浙江东南金属薄板有限公司 | Cold-rolling strip steel production process |
| CN113005264A (en) * | 2021-02-20 | 2021-06-22 | 包头市威丰稀土电磁材料股份有限公司 | Oriented silicon steel magnetic field annealing process |
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Application publication date: 20111019 |