CN111996353A - High-efficiency production method of electrical steel - Google Patents
High-efficiency production method of electrical steel Download PDFInfo
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- CN111996353A CN111996353A CN202010767909.5A CN202010767909A CN111996353A CN 111996353 A CN111996353 A CN 111996353A CN 202010767909 A CN202010767909 A CN 202010767909A CN 111996353 A CN111996353 A CN 111996353A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1233—Cold rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention relates to a production method of high-efficiency electrical steel, which adopts a multilayer composite method, and adopts a continuous casting mode to cast molten steel into a blank after the molten steel is smelted to a target component; the hot rolled plate blank is taken out at the temperature of 1030-1200 ℃, and is rolled to the thickness of 1.5-3.0 mm in a finishing mill group for coiling; the finishing temperature is controlled to be 820-900 ℃; pickling and cold-rolling to a thickness of 0.1-0.4 mm; the finished product is formed by compounding three layers of steel strips, the annealing middle layer of the finished product adopts a self-bonding coating, the outer layer adopts a semi-organic coating, the three layers of steel strips are compounded and coiled after annealing, then the steel strips are heated to 100-300 ℃, the temperature is kept, and curing treatment is carried out. The advantages are that: under the condition of reducing the addition amount of the alloy, the iron loss is greatly reduced, and the magnetic induction performance is improved.
Description
Technical Field
The invention belongs to the field of electrical steel production, and particularly relates to a high-efficiency electrical steel production method.
Background
High magnetic induction, low iron loss are two directions of non-oriented silicon steel development, improve under the general condition and all can make the iron loss rise to magnetic induction, improve the technology of both performances simultaneously and have: 1. alloying components: the electromagnetic property is further improved under the condition that other means are exerted to the utmost extent. The method adds tin, antimony and other trace elements into the steel to improve the texture of the product, thereby improving the performance of the finished product. The method can only improve the performance to a small extent, and can not obviously improve the performance of a finished product; 2. improving the alloy content: the method improves the resistivity of the product and reduces the iron loss of the product by improving the content of elements such as silicon and aluminum in the steel. But the method reduces the iron loss and the magnetic induction strength; 3. normalizing the hot rolled plate: the magnetic induction material is applied to high-grade products and is commonly used for improving the magnetic induction performance of the products. But the magnetic induction improving effect on the medium and low grade product performance is not obvious.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a high-efficiency production method of electrical steel, which can greatly reduce the iron loss and improve the magnetic induction performance under the condition of reducing the alloy addition.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a production method of high-efficiency electrical steel adopts a multilayer compounding method, and the process route is as follows: the method comprises the following steps of molten iron desulphurization, converter smelting, RH refining, continuous casting, hot rolling, acid cleaning, cold rolling, continuous furnace annealing, coating, performance inspection and packaging, and specifically comprises the following steps:
1) smelting the molten steel to a target component, and then casting the molten steel into a blank in a continuous casting mode;
2) the discharging temperature of the hot-rolled plate blank is 1030-1200 ℃, the plate blank is initially rolled to the thickness of 30-50 mm, and the plate blank enters a finishing mill set to be rolled to the thickness of 1.5-3.0 mm for coiling; the start rolling temperature of finish rolling is 920-1050 ℃, the finish rolling temperature is controlled at 820-900 ℃, and the coiling temperature is 600-770 ℃;
3) pickling and cold-rolling to a thickness of 0.1-0.4 mm;
4) annealing the cold-rolled coil at 750-900 ℃ and then coating;
5) the finished product is formed by compounding three layers of steel strips, the annealing middle layer of the finished product adopts a self-bonding coating, the outer layer adopts a semi-organic coating, the three layers of steel strips are compounded and coiled after annealing, then the steel strips are heated to 100-300 ℃, the temperature is kept for 30-200 min, and the steel strips are cured to form the finished product with the target thickness of 0.3-1.2 mm.
The high-efficiency electrical steel comprises the following components in percentage by weight:
c is less than or equal to 0.010 percent, Si: 0.1-1.5%, Als is less than or equal to 0.8%, Mn: 0.10 to 0.80 percent of the total weight of the alloy, less than or equal to 0.15 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.0050 percent of N, and the balance of Fe and inevitable residual elements.
Compared with the prior art, the invention has the beneficial effects that:
the method is suitable for the production of the motor iron core by high-speed stamping and automatic riveting, can be produced by using the existing production line, and does not need to transform equipment; the method greatly reduces the iron loss and improves the magnetic induction performance under the condition of reducing the addition amount of the alloy; because of the thinner specification of the cold-rolled steel strip, the continuous annealing adopts lower temperature; the method solves the problem that thin products are not suitable for high-speed stamping, improves the stamping efficiency, and finally obtains the high-efficiency electrical steel with the iron loss of 3.0-4.5W/kg and the magnetic induction of 1.70-1.76T.
Detailed Description
The present invention is described in detail below, but it should be noted that the practice of the present invention is not limited to the following embodiments.
Example 1
The high-efficiency electrical steel comprises the following chemical components in percentage by weight: c: 0.002%, Si: 0.80%, Mn: 0.22%, P: 0.011%, S: 0.003%, Als: 0.22%, N: 0.0013 percent, and the balance of iron and inevitable impurity elements.
The production process of high efficiency electric steel includes the following steps:
1) smelting and continuous casting: smelting in a converter, carrying out RH vacuum refining treatment, controlling the components of molten steel according to the requirements, and casting into a plate blank with the thickness of 230 mm;
2) the tapping temperature of the hot-rolled plate blank is 1130 ℃, the thickness of the hot-rolled plate blank is initially rolled to 38mm, and then the hot-rolled plate blank enters a finishing mill group for rolling. The initial rolling temperature of finish rolling is 980 ℃, the final rolling temperature is 880 ℃, and the coiling temperature is 720 ℃;
3) cold rolling to 0.16mm after acid cleaning;
4) after cold rolling, the steel sheet was continuously annealed at 870 ℃ for 1min (continuous annealing at 870 ℃ for 1 minute).
After the cold-rolled steel strip is continuously annealed, the surfaces of two coils of the cold-rolled steel strip are coated with semi-organic coatings, one coil of the cold-rolled steel strip is coated with a self-adhesive coating, the three coils of the cold-rolled steel strip are sequentially overlapped and heated to 180 ℃ according to the middle layer of the cold-rolled steel strip, the temperature is kept for 50min, and the cold-rolled steel strip is cured to be a finished product with the thickness of. Wherein the self-bonding coating adopts Aishi 1175 series paint.
Comparative example:
the hot rolling raw material with silicon content increased to 1.2 percent and other components the same as the hot rolling raw material in the example is adopted, cold rolling is directly carried out to 0.5mm steel strip, the annealing temperature of the finished product is increased to 900 ℃, and a semi-organic coating is coated.
Example 2
The high-efficiency electrical steel comprises the following chemical components in percentage by weight: c: 0.002%, Si: 0.60%, Mn: 0.25%, P: 0.013%, S: 0.004%, Als: 0.25%, N: 0.0014 percent, and the balance of iron and inevitable impurity elements.
The production process of high efficiency electric steel includes the following steps:
1) smelting and continuous casting: smelting in a converter, carrying out RH vacuum refining treatment, controlling the components of molten steel according to the requirements, and casting into a plate blank with the thickness of 230 mm;
2) the tapping temperature of the hot-rolled plate blank is 1130 ℃, the thickness of the hot-rolled plate blank is initially rolled to 38mm, and then the hot-rolled plate blank enters a finishing mill group for rolling. The initial rolling temperature of finish rolling is 990 ℃, the final rolling temperature is 870 ℃, and the coiling temperature is 730 ℃;
3) cold rolling to 0.21mm after acid cleaning;
4) after cold rolling, continuous annealing is carried out at 850 ℃ for 1 min.
After the cold-rolled steel strip is continuously annealed, the surfaces of two coils of the cold-rolled steel strip are coated with semi-organic coatings, one coil of the cold-rolled steel strip is coated with a self-adhesive coating, the three coils of the cold-rolled steel strip are sequentially overlapped and heated to 180 ℃ according to the middle layer of the cold-rolled steel strip, the temperature is kept for 50min, and the cold-rolled steel strip is cured to be a finished product with the thickness of. Wherein the self-bonding coating adopts Aishi 1175 series paint.
Comparative example:
the hot rolling raw materials with silicon content increased to 0.8 percent and other components the same as the hot rolling raw materials in the embodiment are adopted, cold rolling is directly carried out on the steel strip with the thickness of 0.5mm, the annealing temperature of the finished product is increased to 900 ℃, and a semi-organic coating is coated.
| Iron loss, W/kg | Magnetic induction, T | |
| Example 2 | 4.22 | 1.74 |
| Comparative example | 4.53 | 1.71 |
Example 3
The high-efficiency electrical steel comprises the following chemical components in percentage by weight: c: 0.002%, Si: 0.80%, Mn: 0.22%, P: 0.011%, S: 0.003%, Als: 0.22%, N: 0.0013 percent, and the balance of iron and inevitable impurity elements.
The production process of high efficiency electric steel includes the following steps:
1) smelting and continuous casting: smelting in a converter, carrying out RH vacuum refining treatment, controlling the components of molten steel according to the requirements, and casting into a plate blank with the thickness of 230 mm;
2) the tapping temperature of the hot-rolled plate blank is 1130 ℃, the thickness of the hot-rolled plate blank is initially rolled to 38mm, and then the hot-rolled plate blank enters a finishing mill group for rolling. The initial rolling temperature of finish rolling is 980 ℃, the final rolling temperature is 880 ℃, and the coiling temperature is 720 ℃;
3) cold rolling to 0.11mm after acid cleaning;
4) after cold rolling, continuous annealing is carried out at 850 ℃ for 1 min.
After the cold-rolled steel strip is continuously annealed, the surfaces of two coils of the cold-rolled steel strip are coated with semi-organic coatings, one coil of the cold-rolled steel strip is coated with a self-adhesive coating, the three coils of the cold-rolled steel strip are sequentially overlapped and heated to 180 ℃ according to the middle layer of the cold-rolled steel strip, the temperature is kept for 50min, and the cold-rolled steel strip is cured to be a finished product with the thickness of. Wherein the self-bonding coating adopts Aishi 1175 series paint.
Comparative example:
the hot rolling raw material with silicon content increased to 1.2 percent and other components the same as the hot rolling raw material in the example is adopted, cold rolling is directly carried out to 0.5mm steel strip, the annealing temperature of the finished product is increased to 880 ℃, and a semi-organic coating is coated.
| Iron loss, W/kg | Magnetic induction, T | |
| Examples | 3.89 | 1.72 |
| Comparative example | 4.32 | 1.68 |
。
Claims (2)
1. The production method of the high-efficiency electrical steel is characterized in that a multi-layer compounding method is adopted, and the process route is as follows: the method comprises the following steps of molten iron desulphurization, converter smelting, RH refining, continuous casting, hot rolling, acid cleaning, cold rolling, continuous furnace annealing, coating, performance inspection and packaging, and specifically comprises the following steps:
1) smelting the molten steel to a target component, and then casting the molten steel into a blank in a continuous casting mode;
2) the discharging temperature of the hot-rolled plate blank is 1030-1200 ℃, the plate blank is initially rolled to the thickness of 30-50 mm, and the plate blank enters a finishing mill set to be rolled to the thickness of 1.5-3.0 mm for coiling; the start rolling temperature of finish rolling is 920-1050 ℃, the finish rolling temperature is controlled at 820-900 ℃, and the coiling temperature is 600-770 ℃;
3) pickling and cold-rolling to a thickness of 0.1-0.4 mm;
4) annealing the cold-rolled coil at 750-900 ℃ and then coating;
5) the finished product is formed by compounding three layers of steel strips, the annealing middle layer of the finished product adopts a self-bonding coating, the outer layer adopts a semi-organic coating, the three layers of steel strips are compounded and coiled after annealing, then the steel strips are heated to 100-300 ℃, the temperature is kept for 30-200 min, and the steel strips are cured to form the finished product with the target thickness of 0.3-1.2 mm.
2. The method of claim 1, wherein the high efficiency electrical steel comprises the following components in percentage by weight:
c is less than or equal to 0.010 percent, Si: 0.1-1.5%, Als is less than or equal to 0.8%, Mn: 0.10 to 0.80 percent of the total weight of the alloy, less than or equal to 0.15 percent of P, less than or equal to 0.015 percent of S, less than or equal to 0.0050 percent of N, and the balance of Fe and inevitable residual elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010767909.5A CN111996353A (en) | 2020-08-03 | 2020-08-03 | High-efficiency production method of electrical steel |
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| CN202010767909.5A CN111996353A (en) | 2020-08-03 | 2020-08-03 | High-efficiency production method of electrical steel |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113755750A (en) * | 2021-08-19 | 2021-12-07 | 鞍钢股份有限公司 | Production method of phosphorus-containing high-magnetic-induction non-oriented silicon steel |
| CN113789467A (en) * | 2021-08-19 | 2021-12-14 | 鞍钢股份有限公司 | Production method of phosphorus-containing aluminum-free high-efficiency non-oriented silicon steel |
| CN114150211A (en) * | 2021-11-29 | 2022-03-08 | 中山市中圣金属板带科技有限公司 | Production method of steel plate for electromagnetic shielding and steel plate for electromagnetic shielding |
| CN116422560A (en) * | 2023-03-06 | 2023-07-14 | 首钢智新迁安电磁材料有限公司 | Electrical steel core and preparation method thereof |
| CN116809357A (en) * | 2023-06-02 | 2023-09-29 | 山西太钢不锈钢股份有限公司 | Production method of self-adhesive composite coating of electrical steel |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113755750A (en) * | 2021-08-19 | 2021-12-07 | 鞍钢股份有限公司 | Production method of phosphorus-containing high-magnetic-induction non-oriented silicon steel |
| CN113789467A (en) * | 2021-08-19 | 2021-12-14 | 鞍钢股份有限公司 | Production method of phosphorus-containing aluminum-free high-efficiency non-oriented silicon steel |
| CN114150211A (en) * | 2021-11-29 | 2022-03-08 | 中山市中圣金属板带科技有限公司 | Production method of steel plate for electromagnetic shielding and steel plate for electromagnetic shielding |
| CN116422560A (en) * | 2023-03-06 | 2023-07-14 | 首钢智新迁安电磁材料有限公司 | Electrical steel core and preparation method thereof |
| CN116809357A (en) * | 2023-06-02 | 2023-09-29 | 山西太钢不锈钢股份有限公司 | Production method of self-adhesive composite coating of electrical steel |
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Application publication date: 20201127 |