CN103266205A - EI type orientation silicon steel plate annealing process - Google Patents
EI type orientation silicon steel plate annealing process Download PDFInfo
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- CN103266205A CN103266205A CN2013101258707A CN201310125870A CN103266205A CN 103266205 A CN103266205 A CN 103266205A CN 2013101258707 A CN2013101258707 A CN 2013101258707A CN 201310125870 A CN201310125870 A CN 201310125870A CN 103266205 A CN103266205 A CN 103266205A
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Abstract
The invention discloses an EI type orientation silicon steel plate annealing process, which comprises a heating and annealing step and a cooling step, characterized in that the annealing process also comprises a degreasing step. The advantages of the invention are as following: the process is simple, the operation is easy, the workpiece after annealing is not sticky and the usage is convenint; the workpiece performance is raised; the load current is reduced by 20-30%; the load loss is reduced by 35-40%.
Description
Technical field
The present invention relates to a kind of annealing process, specifically, relate to a kind of annealing process of EI shape oriented silicon steel sheet.
Background technology
Present EI shape oriented silicon steel sheet does not carry out skimming treatment in annealing process, be stained with easily after each silicon-steel sheet annealing is come out of the stove to stick together, and work brings inconvenience to postorder; In addition, siliconized plate is easily oxidized in the annealing process, causes its use properties to descend, and influences the quality of product.Therefore, need a kind of new technical scheme to solve above-mentioned technical problem.
Summary of the invention
The purpose of this invention is to provide a kind of annealing technology of EI shape oriented silicon steel sheet, adopt this annealing process, be not stained with stickingly after silicon-steel sheet annealing is come out of the stove, use properties obviously improves, and no-load current descends, and open circuit loss reduces.
The technical solution used in the present invention is:
The annealing process of EI shape oriented silicon steel sheet comprises defatting step, heating anneal and cooling step, all adopts nitrogen protection in described degreasing, annealing, the cooling step.
Described defatting step is specifically: workpiece is put into the annealing furnace internal heating be warming up to 300 ℃～350 ℃, constantly charge into nitrogen then in annealing furnace, discharge waste gas in the stove, simultaneously insulation 90-100min in the stove;
Described heating anneal step is specifically: workpiece is continued to be warming up to 800 ℃～820 ℃ and be incubated 150-160min, keep nitrogen to charge in whole intensification and the insulating process;
Described cooling step is specifically: annealing furnace stops heating, and workpiece begins cooling, still keeps nitrogen to charge in the temperature-fall period, after workpiece is cooled to below 250 ℃, stops nitrogen and charges into, and workpiece can be come out of the stove.
The purity of described nitrogen reaches more than 99.9%.
Advantage of the present invention is: the simple easy handling of technology, and annealing back workpiece is not stained with sticking, easy to use, and the workpiece performance is improved, no-load current decline 20-30%, open circuit loss reduces 35-40%.
Embodiment
Embodiment 1
The annealing process of EI shape oriented silicon steel sheet, comprise defatting step, heating anneal and cooling step, defatting step: workpiece is put into the annealing furnace internal heating be warming up to 300 ℃, constantly charge into purity then in the annealing furnace and reach nitrogen more than 99.9%, discharge waste gas in the stove, insulation 100min in the stove to prevent the workpiece oxidation, forms protective layer at workpiece surface simultaneously;
Heating anneal step: workpiece is continued to be warming up to 800 ℃ and be incubated 160min, keep nitrogen to charge in whole intensification and the insulating process;
Cooling step: annealing furnace stops heating, and workpiece begins cooling, still keeps nitrogen to charge in the temperature-fall period, after workpiece is cooled to below 250 ℃, stops nitrogen and charges into, and workpiece can be come out of the stove.
Embodiment 2
The annealing process of EI shape oriented silicon steel sheet, comprise defatting step, heating anneal and cooling step, defatting step: workpiece is put into the annealing furnace internal heating be warming up to 350 ℃, constantly charge into purity then in the annealing furnace and reach nitrogen more than 99.9%, discharge waste gas in the stove, insulation 90min in the stove to prevent the workpiece oxidation, forms protective layer at workpiece surface simultaneously;
Heating anneal step: workpiece is continued to be warming up to 820 ℃ and be incubated 150min, keep nitrogen to charge in whole intensification and the insulating process;
Cooling step: annealing furnace stops heating, and workpiece begins cooling, still keeps nitrogen to charge in the temperature-fall period, after workpiece is cooled to below 250 ℃, stops nitrogen and charges into, and workpiece can be come out of the stove.
Embodiment 3
The annealing process of EI shape oriented silicon steel sheet, comprise defatting step, heating anneal and cooling step, defatting step: workpiece is put into the annealing furnace internal heating be warming up to 330 ℃, constantly charge into purity then in the annealing furnace and reach nitrogen more than 99.9%, discharge waste gas in the stove, insulation 950min in the stove to prevent the workpiece oxidation, forms protective layer at workpiece surface simultaneously;
Heating anneal step: workpiece is continued to be warming up to 810 ℃ and be incubated 155min, keep nitrogen to charge in whole intensification and the insulating process;
Cooling step: annealing furnace stops heating, and workpiece begins cooling, still keeps nitrogen to charge in the temperature-fall period, after workpiece is cooled to below 250 ℃, stops nitrogen and charges into, and workpiece can be come out of the stove.
Claims (4)
1.EI the annealing process of shape oriented silicon steel sheet comprises heating anneal and cooling step, it is characterized in that: also comprise defatting step.
2. the annealing process of EI shape oriented silicon steel sheet according to claim 1 is characterized in that: all adopt nitrogen protection in described degreasing, annealing, the cooling step.
3. the annealing process of EI shape oriented silicon steel sheet according to claim 2 is characterized in that:
Described defatting step is specifically: workpiece is put into the annealing furnace internal heating be warming up to 300 ℃～350 ℃, constantly charge into nitrogen then in annealing furnace, discharge waste gas in the stove, simultaneously insulation 90-100min in the stove;
Described heating anneal step is specifically: workpiece is continued to be warming up to 800 ℃～820 ℃ and be incubated 150-160min, keep nitrogen to charge in whole intensification and the insulating process;
Described cooling step is specifically: annealing furnace stops heating, and workpiece begins cooling, still keeps nitrogen to charge in the temperature-fall period, after workpiece is cooled to below 250 ℃, stops nitrogen and charges into, and workpiece can be come out of the stove.
4. according to the annealing process of claim 2 or 3 described EI shape oriented silicon steel sheets, it is characterized in that: the purity of described nitrogen reaches more than 99.9%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101258707A CN103266205A (en) | 2013-04-12 | 2013-04-12 | EI type orientation silicon steel plate annealing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101258707A CN103266205A (en) | 2013-04-12 | 2013-04-12 | EI type orientation silicon steel plate annealing process |
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| Publication Number | Publication Date |
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| CN103266205A true CN103266205A (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013101258707A Pending CN103266205A (en) | 2013-04-12 | 2013-04-12 | EI type orientation silicon steel plate annealing process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911324A (en) * | 2015-07-09 | 2015-09-16 | 福建安顺变压器有限公司 | Silicon steel sheet vacuum annealing process |
| CN113755691A (en) * | 2021-07-08 | 2021-12-07 | 华磁(深圳)科技有限责任公司 | Manufacturing method of silicon steel ultra-thin strip with high silicon content |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6393823A (en) * | 1986-10-09 | 1988-04-25 | Nkk Corp | Annealing method for high silicon iron plate |
| CN101643881A (en) * | 2008-08-08 | 2010-02-10 | 宝山钢铁股份有限公司 | Method for producing oriented silicon steel bearing copper |
| CN101748257A (en) * | 2008-12-12 | 2010-06-23 | 鞍钢股份有限公司 | Method for manufacturing directional silicon steel |
| CN101871041A (en) * | 2010-07-14 | 2010-10-27 | 吴建荣 | Continuous annealing bluing process of sheet punching work piece of cold rolling silicon steel sheet |
| CN102330021A (en) * | 2011-09-16 | 2012-01-25 | 江油市丰威特种带钢有限责任公司 | Full production process of low-temperature oriented silicon steel |
-
2013
- 2013-04-12 CN CN2013101258707A patent/CN103266205A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6393823A (en) * | 1986-10-09 | 1988-04-25 | Nkk Corp | Annealing method for high silicon iron plate |
| CN101643881A (en) * | 2008-08-08 | 2010-02-10 | 宝山钢铁股份有限公司 | Method for producing oriented silicon steel bearing copper |
| CN101748257A (en) * | 2008-12-12 | 2010-06-23 | 鞍钢股份有限公司 | Method for manufacturing directional silicon steel |
| CN101871041A (en) * | 2010-07-14 | 2010-10-27 | 吴建荣 | Continuous annealing bluing process of sheet punching work piece of cold rolling silicon steel sheet |
| CN102330021A (en) * | 2011-09-16 | 2012-01-25 | 江油市丰威特种带钢有限责任公司 | Full production process of low-temperature oriented silicon steel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911324A (en) * | 2015-07-09 | 2015-09-16 | 福建安顺变压器有限公司 | Silicon steel sheet vacuum annealing process |
| CN104911324B (en) * | 2015-07-09 | 2016-10-05 | 福建安顺变压器有限公司 | Stalloy vacuum annealing process |
| CN113755691A (en) * | 2021-07-08 | 2021-12-07 | 华磁(深圳)科技有限责任公司 | Manufacturing method of silicon steel ultra-thin strip with high silicon content |
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Application publication date: 20130828 |