CN103882211B - The method for annealing of cold rolling non-oriented electrical steel strip - Google Patents
The method for annealing of cold rolling non-oriented electrical steel strip Download PDFInfo
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- CN103882211B CN103882211B CN201210563228.2A CN201210563228A CN103882211B CN 103882211 B CN103882211 B CN 103882211B CN 201210563228 A CN201210563228 A CN 201210563228A CN 103882211 B CN103882211 B CN 103882211B
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Abstract
The invention provides a kind of method for annealing of cold rolling non-oriented electrical steel strip, comprise the following steps: 1) be cold-rolled to 0.15 ~ 0.20mm after normalizing pickling, surface of steel plate is the even application MgO aqueous solution in cold rolling final finished passage process; 2) cold rolling rear rolling bell-type annealing, adopts N
2+ H
2protection, N
2volumn concentration 10% ~ 90%, H
2volumn concentration 10% ~ 90%, 400 ~ 500 DEG C of insulation 2 ~ 10h, carry out the recrystallization annealing of 850 ~ 1000 DEG C, annealing time 8 ~ 20h subsequently; 3) stretch annealing, with 3% ~ 8% rare H before annealing
2sO
4wash MgO coating off, carry out 500 ~ 900 DEG C of stress relievings, apply tension force, tension control is at 0.8 ~ 5KN.The present invention adopts cover annealing, and annealing post-stretching flattening process, not only obtain excellent electromagnetic performance but also can ensure good template, substantially increase lumber recovery, reduce broken belt, lumber recovery improves 10% ~ 20%.Can variable-frequency motor be widely used in, expand the Application Areas of electrical steel.<!--1-->
Description
Technical field
The present invention relates to the production method of cold rolling non-oriented electrical steel strip, particularly a kind of method for annealing of cold rolling non-oriented electrical steel strip.
Background technology
Along with the widespread use of energy-saving and frequency-variable technology, cold rolling non-orientation silicon steel product thickness specification successively decreases 0.30mm, 0.25mm, 0.20mm, 0.15mm until strip in razor-thin kind from 0.35mm, finished product thickness is thinner, continuous annealing process interrupt band is more frequent, lumber recovery and production efficiency low, production cost significantly promotes, and brings difficulty to production.
Although current cover annealing is widely used on cold rolling non-orientation silicon steel general thickness product, be seldom used in the production of non-orientation silicon steel thin belt, what its application was maximum is box annealing, continuous annealing mode.Inquiring publication number is that CN101269384A " a kind of manufacture method of cold rolling non-orientation silicon steel thin belt " mainly relates to finished product batch annealing, and 850 ~ 950 DEG C are incubated 90 ~ 120 minutes, the high-purity H of protective atmosphere
2; Publication number is mention two-part annealing in CN101935800A " a kind of high silicon steel thin belt and preparation method thereof " patent, i.e. first stage 950 ~ 1150 DEG C × 5min, subordinate phase 600 DEG C × 10min etc., not mentioned cover annealing adds flattening process.
Summary of the invention
The invention provides a kind of method for annealing of cold rolling non-oriented electrical steel strip, effectively can prevent broken belt, magnetic property is excellent simultaneously, meets converter technique requirement.
The present invention is applicable to the production of the thick cold rolling non-oriented electrical steel strip product of 0.15 ~ 0.20mm, and relate generally to annealing way, the present invention adopts cover annealing, annealing post-stretching flattening process.Concrete technology is as follows:
1. be cold-rolled to 0.15 ~ 0.20mm after normalizing pickling, surface of steel plate is the even application MgO aqueous solution in cold rolling final finished passage process, prevents from being oxidized in rear operation;
2. cold rolling rear rolling bell-type annealing, adopts N
2+ H
2protection, N
2volumn concentration 10% ~ 90%, H
2volumn concentration 10% ~ 90%; 400 ~ 500 DEG C of insulation 2 ~ 10h, make coating be dried and solidify; Carry out the recrystallization annealing of 850 ~ 1000 DEG C subsequently, annealing time 8 ~ 20h, make the abundant recrystallize of deformed grains make crystal grain more even simultaneously;
3. stretch annealing, with 3% ~ 8% rare H before annealing
2sO
4wash MgO coating off, carry out 500 ~ 900 DEG C of stress relievings, apply tension force, make its plate shape best, tension control is at 0.8 ~ 5KN;
Material composition required by above-mentioned technique: C≤0.003%, Si:1.0% ~ 4.0%, Al:0.5% ~ 2.0%, Mn:0.10% ~ 0.30%, P≤0.008%, S≤0.0015%, N≤0.0020%, all the other are Fe and inevitable residual element.
In the present invention, finished product adopts cover annealing, and annealing post-stretching flattening process, not only obtain excellent electromagnetic performance but also can ensure good template, substantially increase lumber recovery, reduce broken belt, lumber recovery improves 10% ~ 20%.Can variable-frequency motor be widely used in, expand the Application Areas of electrical steel.
Embodiment
Embodiment 1
1. be cold-rolled to 0.15mm after normalizing, the cold rolling final finished passage even application MgO aqueous solution;
2. cold rolling rear rolling bell-type annealing, adopts N
2+ H
2protection, N
2volume basis: 30%; H
2volume basis: 70%; 450 DEG C of insulation 5h, object is dried and solidified coating; 850 DEG C annealing 12h, object recrystallize and crystal grain more even;
3. stretching, (concentration is 6% rare H in annealing
2sO
4wash MgO off), 650 DEG C of stress relievings, make its plate shape best, tension force 0.8KN;
Embodiment 2
1. be cold-rolled to 0.18mm after normalizing, the cold rolling final finished passage even application MgO aqueous solution;
2. cold rolling rear rolling bell-type annealing, adopts N
2+ H
2protection, N
2volume basis: 20%; H
2volume basis: 80%; 420 DEG C of insulation 3h, object is dried and solidified coating; 880 DEG C annealing 12h, object recrystallize and crystal grain more even;
3. stretching, (concentration is 6% rare H in annealing
2sO
4wash MgO off), 750 DEG C of stress relievings, make its plate shape best, tension force 1.2KN;
Embodiment 3
1. be cold-rolled to 0.20mm after normalizing, the cold rolling final finished passage even application MgO aqueous solution;
2. cold rolling rear rolling bell-type annealing, adopts N
2+ H
2protection, N
2volume basis: 40%; H
2volume basis: 60%; 480 DEG C of insulation 7h, object is dried and solidified coating; 920 DEG C annealing 12h, object recrystallize and crystal grain more even;
3. stretching, (concentration is 6% rare H in annealing
2sO
4wash MgO off), 850 DEG C of stress relievings, make its plate shape best, tension force 1.5KN;
According to the cold rolling non-oriented electrical steel strip that above-mentioned technique obtains, surface of steel plate non-oxidation, plate shape is smooth, with plate poor≤10 μm, electromagnetic performance is as follows:
Claims (2)
1. the method for annealing of cold rolling non-oriented electrical steel strip, is characterized in that comprising the following steps:
1) be cold-rolled to 0.15 ~ 0.20mm after normalizing pickling, surface of steel plate is the even application MgO aqueous solution in cold rolling final finished passage process;
2) cold rolling rear rolling bell-type annealing, adopts N
2+ H
2protection, N
2volumn concentration 10% ~ 90%, H
2volumn concentration 10% ~ 90%, 400 ~ 500 DEG C of insulation 2 ~ 10h, carry out the recrystallization annealing of 850 ~ 1000 DEG C, annealing time 8 ~ 20h subsequently;
3) stretch annealing, with 3% ~ 8% rare H before annealing
2sO
4wash MgO coating off, carry out 500 ~ 850 DEG C of stress relievings, apply tension force, tension control is at 0.8 ~ 5KN.
2. the method for annealing of cold rolling non-oriented electrical steel strip according to claim 1, it is characterized in that the material composition required by above-mentioned technique is: C≤0.003%, Si:1.0% ~ 4.0%, Al:0.5% ~ 2.0%, Mn:0.10% ~ 0.30%, P≤0.008%, S≤0.0015%, N≤0.0020%, all the other are Fe and other inevitable residual element.
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| CN201210563228.2A CN103882211B (en) | 2012-12-21 | 2012-12-21 | The method for annealing of cold rolling non-oriented electrical steel strip |
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| CN201210563228.2A CN103882211B (en) | 2012-12-21 | 2012-12-21 | The method for annealing of cold rolling non-oriented electrical steel strip |
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| CN103882211A CN103882211A (en) | 2014-06-25 |
| CN103882211B true CN103882211B (en) | 2016-03-02 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141092B (en) * | 2014-07-17 | 2016-05-18 | 北京首钢股份有限公司 | A kind of three-dimensional reel iron core transformer non-oriented electrical steel and production method thereof |
| CN105779877B (en) * | 2014-12-23 | 2017-10-27 | 鞍钢股份有限公司 | A kind of high-efficiency method for producing of half-technique non oriented electrical steel |
| CN108893587A (en) * | 2018-08-24 | 2018-11-27 | 首钢智新迁安电磁材料有限公司 | A kind of preparation method and its application of MgO interleaving agent slurries |
| CN109082596B (en) * | 2018-09-04 | 2019-12-13 | 马鞍山钢铁股份有限公司 | Non-oriented silicon steel with low iron loss and high magnetic polarization strength and preparation method thereof |
| CN109023116B (en) * | 2018-09-30 | 2021-09-07 | 日照钢铁控股集团有限公司 | Method for producing non-oriented electrical steel by adopting thin slab endless rolling |
| CN113621774B (en) * | 2021-10-14 | 2022-01-18 | 江苏省沙钢钢铁研究院有限公司 | High-silicon non-oriented electrical steel and production method thereof |
| CN114369754A (en) * | 2021-11-29 | 2022-04-19 | 广东中晟电磁科技股份有限公司 | Method for producing low-and-medium-grade non-oriented electrical steel through prestress |
Citations (3)
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| CN101492786A (en) * | 2008-01-23 | 2009-07-29 | 北京中钢贸科技发展有限公司 | Method for producing non-oriented silicon steel |
| CN102127702A (en) * | 2011-01-16 | 2011-07-20 | 首钢总公司 | Method for preparing low-S high-grade non-oriented electrical steel |
| CN102747291A (en) * | 2012-07-06 | 2012-10-24 | 咸宁泉都带钢科技有限公司 | High-frequency low-iron-loss excellent-magnetic-property non-orientated silicon steel strip and production method thereof |
-
2012
- 2012-12-21 CN CN201210563228.2A patent/CN103882211B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101492786A (en) * | 2008-01-23 | 2009-07-29 | 北京中钢贸科技发展有限公司 | Method for producing non-oriented silicon steel |
| CN102127702A (en) * | 2011-01-16 | 2011-07-20 | 首钢总公司 | Method for preparing low-S high-grade non-oriented electrical steel |
| CN102747291A (en) * | 2012-07-06 | 2012-10-24 | 咸宁泉都带钢科技有限公司 | High-frequency low-iron-loss excellent-magnetic-property non-orientated silicon steel strip and production method thereof |
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| CN103882211A (en) | 2014-06-25 |
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