CN110777299A - Ce-containing high-magnetic-induction non-oriented silicon steel and preparation method thereof - Google Patents
Ce-containing high-magnetic-induction non-oriented silicon steel and preparation method thereof Download PDFInfo
- Publication number
- CN110777299A CN110777299A CN201911152829.2A CN201911152829A CN110777299A CN 110777299 A CN110777299 A CN 110777299A CN 201911152829 A CN201911152829 A CN 201911152829A CN 110777299 A CN110777299 A CN 110777299A
- Authority
- CN
- China
- Prior art keywords
- percent
- magnetic
- rolling
- hot
- silicon steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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%
-
- 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
-
- 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
-
- 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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
-
- 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
Abstract
The invention discloses Ce-containing high-magnetic-induction non-oriented silicon steel and a preparation method thereof, wherein the Ce-containing high-magnetic-induction non-oriented silicon steel comprises the following components in percentage by mass: less than or equal to 0.003 percent of C, 1.10 to 1.50 percent of Si, 0.15 to 0.45 percent of Mn, 0.30 to 0.55 percent of Als, less than or equal to 0.002 percent of S, less than or equal to 0.005 percent of O, 0.0010 to 0.020 percent of Ce, and the balance of Fe and inevitable impurities; the invention fully utilizes rare earth Ce metamorphic inclusion, regulates grain size and improves the mechanism favorable for texture, and adopts the CSP (continuous casting and rolling) technology of hot delivery and hot rolling of sheet billet to prepare the rare earth element Ce-containing high magnetic induction non-extractionTo silicon steel, its magnetic induction B
501.804T can be achieved.
Description
Technical Field
The invention relates to the technical field of high-performance silicon steel preparation, in particular to Ce-containing high-magnetic-induction non-oriented silicon steel and a preparation method thereof.
Background
The non-oriented silicon steel is the most widely applied soft magnetic material in the motor, is one of key materials for forming a core component of the motor, and the magnetic performance of the non-oriented silicon steel directly influences the efficiency of the motor. The adoption of the high-efficiency non-oriented silicon steel is one of the main ways of reducing the volume, lightening the weight, saving the iron loss consumption and improving the efficiency of electromechanical products. With the increasing requirements of the country and the society on environmental protection, energy conservation and consumption reduction and the increasing attention degree, the electromechanical products are continuously developed towards miniaturization and high efficiency, and the development of the high-magnetic-induction high-efficiency non-oriented silicon steel has obvious significance in energy conservation and consumption reduction.
The magnetic performance of the non-oriented silicon steel is determined by two aspects: core loss (iron loss) and magnetic induction (magnetic induction). High magnetic induction and low iron loss are guarantees of good magnetic performance. However, both of them cannot be compatible with each other, and it is difficult to achieve both of them. Therefore, the improvement of magnetic induction and the reduction of iron loss are the key problems in the development process of the high-efficiency non-oriented silicon steel. The current solutions are mainly: adjusting the contents of silicon and aluminum; the manganese content is improved; the contents of harmful elements such as carbon, sulfur, nitrogen, oxygen and the like are reduced; antimony, tin and other elements which are easy to be segregated in grain boundaries are added. However, silicon and aluminum reduce the iron loss and also reduce the magnetic induction intensity; trace tin and antimony elements can increase favorable texture components, thereby improving magnetic induction, but the elements are segregated in the grain boundary to prevent the crystal grains from growing and are unfavorable for reducing iron loss; manganese is beneficial to improving magnetic induction, but improves the solubility of carbon in steel, thereby increasing iron loss and easily causing magnetic aging. Therefore, the silicon steel can not achieve good effects only from the aspects of adjusting the content of main elements of the silicon steel or adding trace elements of tin, antimony and the like.
In view of the above-mentioned drawbacks, the inventors of the present invention have finally obtained the present invention through a long period of research and practice.
Disclosure of Invention
In order to solve the technical defects, the invention adopts the technical scheme that the Ce-containing high-magnetic-induction non-oriented silicon steel comprises the following components in percentage by mass: less than or equal to 0.003 percent of C, 1.10 to 1.50 percent of Si, 0.15 to 0.45 percent of Mn, 0.30 to 0.55 percent of Als, less than or equal to 0.002 percent of S, less than or equal to 0.005 percent of O, 0.0010 to 0.020 percent of Ce, and the balance of Fe and inevitable impurities.
Preferably, the preparation method of the Ce-containing high-magnetic-induction non-oriented silicon steel comprises the steps of smelting, continuous casting, hot-feeding and hot-rolling, coiling, normalizing, pickling, cold rolling, annealing and coating.
Preferably, in the smelting process, the steel material containing pure Fe, pure Mn and single crystal Si is completely melted and then added with aluminum, rare earth Ce with the purity of 99.99 percent is added in the tapping process, the rare earth Ce is added in a mode that fine blocks are wrapped by iron sheets, tapping is cast into casting blanks, and the tapping temperature is 1600 ℃.
Preferably, the casting blank is soaked at 1100-1200 ℃ for 0.5-1 h, and is hot-rolled after soaking, the initial rolling temperature of the hot rolling is 980-1100 ℃, the final rolling temperature is 800-930 ℃, and the thickness of the hot-rolled steel plate is 2.3-2.5 mm.
Preferably, the temperature in the coiling process of the steel plate is 600-700 ℃.
Preferably, the normalization temperature of the curled steel plate is 880-1000 ℃, the normalization time is 150-350 s, and the normalization atmosphere is 100% N
2。
Preferably, the normalized steel plate is pickled to remove iron scales, then is subjected to multi-pass cold rolling to be 0.5mm, and the reduction of each pass is not more than 0.2 mm.
Preferably, when the steel plate is annealed, the annealing temperature is 950-1100 ℃, the annealing time is 180-360 s, and the annealing atmosphere is 30% of H
2Adding 70% of N
2(ii) a And cooling the annealed steel plate to 450-350 ℃ along with the furnace, and taking out for air cooling.
Compared with the prior art, the invention has the beneficial effects that: the invention fully utilizes rare earth Ce metamorphic inclusion, regulates and controls the grain size, improves the mechanism favorable for texture, and adopts the CSP (continuous casting and rolling) technology of hot delivery and hot rolling of thin slabs, thus being a method which has low cost, low energy consumption and easy realization and is used for preparing the high magnetic induction non-oriented silicon steel; the rare earth element Ce-containing material prepared by the inventionHigh magnetic induction non-oriented silicon steel with magnetic induction intensity B
501.804T can be achieved.
Drawings
FIG. 1 is a metallographic structure diagram of the Ce-containing high-magnetic-induction non-oriented silicon steel after annealing treatment.
Detailed Description
The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
Example one
The Ce-containing high-magnetic-induction non-oriented silicon steel comprises the following components in percentage by mass: less than or equal to 0.003 percent of C, 1.10 to 1.50 percent of Si, 0.15 to 0.45 percent of Mn, 0.30 to 0.55 percent of Als (acid-melting aluminum), less than or equal to 0.002 percent of S, less than or equal to 0.005 percent of O, 0.0010 to 0.020 percent of Ce, and the balance of Fe and inevitable impurities.
The preparation method of the Ce-containing high-magnetic-induction non-oriented silicon steel comprises smelting, continuous casting, hot-conveying and hot-rolling, coiling, normalizing, pickling, cold rolling, annealing and coating.
Specifically, in the smelting process, steel materials (pure Fe, pure Mn and single crystal Si) are completely melted and then aluminum is added, rare earth cerium (with the purity of 99.99%) is added in the tapping process, in order to improve the yield and guarantee the uniformity of Ce in steel, the rare earth Ce is added in a mode that fine blocks are wrapped by iron sheets, tapping is cast to form casting blanks, and the tapping temperature is 1600 ℃.
Soaking the casting blank at 1100-1200 ℃ for 0.5-1 h, and then carrying out hot rolling, wherein the initial rolling temperature of the hot rolling is 980-1100 ℃, the final rolling temperature is 800-930 ℃, and the thickness of the hot rolled steel plate is 2.3-2.5 mm.
The steel plate is curled at the temperature of 600-700 ℃.
Normalizing the curled steel plate at 880-1000 deg.c for 150-350 s in 100% N atmosphere
2。
And (3) pickling the normalized steel plate to remove the iron scale, then carrying out multi-pass cold rolling to 0.5mm, wherein the reduction of each pass is not more than 0.2 mm.
Then, annealing the steel plate, wherein the annealing temperature is 950-1100 ℃, the annealing time is 180-360 s, and the annealing atmosphere is 30% of H
2Adding 70% of N
2. And cooling the annealed steel plate to 450-350 ℃ along with the furnace, and taking out for air cooling.
As shown in figure 1, figure 1 is a metallographic structure diagram of the Ce-containing high-magnetic-induction non-oriented silicon steel after annealing treatment, and a result of observation by a ZESS metallographic microscope at 100 times shows that finished product grains are uniform, and the average size is 100-120 μm.
Example two
In this example, the experimental casting blank components were: 0.023% of C, 1.21% of Si, 0.35% of Mn, 0.41% of Als, 0.0026% of S, 0.0027% of O and 0.0016% of Ce.
Heating an experimental casting blank to 1160 ℃, preserving heat for 0.67h, then carrying out hot rolling at 1075 ℃ to the thickness of 2.3-2.5 mm, coiling at 680 ℃, then carrying out normalizing treatment at 950 ℃ for 240s in the normalizing atmosphere of 100% N
2Then acid-washing and cold-rolling to 0.5mm thickness, then making 1000 deg.C x 300s annealing, annealing atmosphere is 30% H
2Adding 70% of N
2And cooling the annealed material to 400 ℃ along with the furnace, taking out the annealed material and air-cooling the annealed material to room temperature, and carrying out magnetic property detection.
The magnetic property of the product of the embodiment is B
50：1.790T，P
15/50：3.611W/kg。
EXAMPLE III
In this example, the experimental casting blank components were: 0.026% of C, 1.20% of Si, 0.32% of Mn, 0.46% of Als, 0.0027% of S, 0.0034% of O and 0.0051% of Ce.
Heating an experimental casting blank to 1160 ℃, preserving heat for 0.67h, then carrying out hot rolling at 1075 ℃ to the thickness of 2.3-2.5 mm, coiling at 680 ℃, then carrying out normalizing treatment at 950 ℃ for 240s in the normalizing atmosphere of 100% N
2Then acid-washing and cold-rolling to 0.5mm thickness, then making 1000 deg.C x 300s annealing, annealing atmosphere is 30% H
2Adding 70% of N
2And cooling the annealed material to 400 ℃ along with the furnace, taking out the annealed material and air-cooling the annealed material to room temperature, and carrying out magnetic property detection.
The magnetic property of the product of the embodiment is B
50：1.804T，P
15/50：3.455W/kg。
Example four
In this example, the experimental casting blank components were: 0.025% of C, 1.24% of Si, 0.33% of Mn, 0.38% of Als, 0.0026% of S, 0.0040% of O and 0.0180% of Ce.
Heating an experimental casting blank to 1160 ℃, preserving heat for 0.67h, then carrying out hot rolling at 1075 ℃ to the thickness of 2.3-2.5 mm, coiling at 680 ℃, then carrying out normalizing treatment at 950 ℃ for 240s in the normalizing atmosphere of 100% N
2Then acid-washing and cold-rolling to 0.5mm thickness, then making 1000 deg.C x 300s annealing, annealing atmosphere is 30% H
2Adding 70% of N
2And cooling the annealed material to 400 ℃ along with the furnace, taking out the annealed material and air-cooling the annealed material to room temperature, and carrying out magnetic property detection.
The magnetic property of the product of the embodiment is B
50：1.775T，P
15/50：3.717W/kg。
EXAMPLE five
In this example, the experimental casting blank components were: 0.026% of C, 1.20% of Si, 0.32% of Mn, 0.46% of Als, 0.0027% of S, 0.0034% of O and 0.0051% of Ce.
Heating an experimental casting blank to 1160 ℃, preserving heat for 0.67h, then carrying out hot rolling at 1075 ℃ to the thickness of 2.3-2.5 mm, coiling at 680 ℃, then carrying out normalizing treatment at 950 ℃ for 240s in the normalizing atmosphere of 100% N
2Then acid-washing and cold-rolling to 0.5mm thickness, then making 950 deg.C x 300s annealing, annealing atmosphere is 30% H
2Adding 70% of N
2And cooling the annealed material to 400 ℃ along with the furnace, taking out the annealed material and air-cooling the annealed material to room temperature, and carrying out magnetic property detection.
The magnetic property of the product of the embodiment is B
50：1.785T，P
15/50：3.562W/kg。
EXAMPLE six
In this example, the experimental casting blank components were: 0.026% of C, 1.20% of Si, 0.32% of Mn, 0.46% of Als, 0.0027% of S, 0.0034% of O and 0.0051% of Ce.
Heating the experimental casting blank to 1160 ℃, preserving heat for 0.67h, hot rolling to 2.3-2.5 mm in thickness at 1075 ℃, coiling at 680 ℃, and normalizing at 950 ℃ for 240sTreating in a normalized atmosphere of 100% N
2Then acid-washing and cold-rolling to 0.5mm thickness, then making 1050 deg.C x 300s annealing, annealing atmosphere is 30% H
2Adding 70% of N
2And cooling the annealed material to 400 ℃ along with the furnace, taking out the annealed material and air-cooling the annealed material to room temperature, and carrying out magnetic property detection.
The magnetic property of the product of the embodiment is B
50：1.793T，P
15/50：3.432W/kg。
The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The Ce-containing high-magnetic-induction non-oriented silicon steel is characterized by comprising the following components in percentage by mass: less than or equal to 0.003 percent of C, 1.10 to 1.50 percent of Si, 0.15 to 0.45 percent of Mn, 0.30 to 0.55 percent of Als, less than or equal to 0.002 percent of S, less than or equal to 0.005 percent of O, 0.0010 to 0.020 percent of Ce, and the balance of Fe and inevitable impurities.
2. The method for preparing the Ce-containing high-magnetic-induction non-oriented silicon steel as set forth in claim 1, comprising the steps of smelting, continuous casting, hot-feeding and hot-rolling, coiling, normalizing, pickling, cold-rolling, annealing and coating.
3. The method according to claim 2, wherein the steel material containing pure Fe, pure Mn, single crystal Si is completely melted and then aluminum is added during the smelting process, and rare earth Ce having a purity of 99.99% is added during the tapping process, the rare earth Ce being added in a manner that fine lumps are covered with the iron sheet, and the tapping is cast into a cast slab at a tapping temperature of 1600 ℃.
4. The preparation method according to claim 3, wherein the casting slab is soaked at 1100 ℃ to 1200 ℃ for 0.5h to 1h, and is hot-rolled after soaking, the start rolling temperature of the hot rolling is 980 ℃ to 1100 ℃, the finish rolling temperature is 800 ℃ to 930 ℃, and the thickness of the hot-rolled steel plate is 2.3mm to 2.5 mm.
5. The production method according to claim 4, wherein the temperature during the coiling of the steel sheet is 600 ℃ to 700 ℃.
6. The method of claim 5, wherein the temperature of the steel sheet after the curling is 880 to 1000 ℃, the time of the normalization is 150 to 350 seconds, and the atmosphere of the normalization is 100% N
2。
7. The method of claim 6, wherein the normalized steel sheet is pickled to remove scale, and then cold rolled in multiple passes to 0.5mm with a reduction of not more than 0.2mm per pass.
8. The method according to claim 7, wherein the steel sheet is annealed at an annealing temperature of 950 to 1100 ℃ for 180 to 360 seconds in an atmosphere of 30% H
2Adding 70% of N
2(ii) a And cooling the annealed steel plate to 450-350 ℃ along with the furnace, and taking out for air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911152829.2A CN110777299A (en) | 2019-11-21 | 2019-11-21 | Ce-containing high-magnetic-induction non-oriented silicon steel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911152829.2A CN110777299A (en) | 2019-11-21 | 2019-11-21 | Ce-containing high-magnetic-induction non-oriented silicon steel and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110777299A true CN110777299A (en) | 2020-02-11 |
Family
ID=69392488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911152829.2A Pending CN110777299A (en) | 2019-11-21 | 2019-11-21 | Ce-containing high-magnetic-induction non-oriented silicon steel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110777299A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114107639A (en) * | 2021-11-25 | 2022-03-01 | 包头钢铁（集团）有限责任公司 | Preparation method of common-grade rare earth oriented silicon steel |
| CN114411064A (en) * | 2022-01-26 | 2022-04-29 | 安徽工业大学 | High-magnetic-induction high-strength cerium-containing copper-containing non-oriented silicon steel and manufacturing method thereof |
-
2019
- 2019-11-21 CN CN201911152829.2A patent/CN110777299A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114107639A (en) * | 2021-11-25 | 2022-03-01 | 包头钢铁（集团）有限责任公司 | Preparation method of common-grade rare earth oriented silicon steel |
| CN114411064A (en) * | 2022-01-26 | 2022-04-29 | 安徽工业大学 | High-magnetic-induction high-strength cerium-containing copper-containing non-oriented silicon steel and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5939797B2 (en) | Method for producing grain-oriented silicon steel by single cold rolling method | |
| JP6580700B2 (en) | High magnetic flux density / low iron loss / non-oriented electrical steel sheet with good surface condition and manufacturing method thereof | |
| CN103695619B (en) | A kind of manufacture method of high magnetic strength common orientation silicon steel | |
| CN102747291B (en) | High-frequency low-iron-loss excellent-magnetic-property non-orientated silicon steel strip and production method thereof | |
| CN102102141B (en) | Hot rolling process for improving structural homogeneity of oriented silicon steel plate | |
| WO2023070982A1 (en) | Non-oriented silicon steel for new energy drive motor, and production method therefor | |
| CN103388106A (en) | Non-oriented electrical steel plate with high magnetic induction and low iron loss, and manufacturing method thereof | |
| JP2013525596A5 (en) | Method for producing highly efficient non-oriented silicon steel with excellent magnetic properties | |
| HUP0004822A2 (en) | Method for producing a magnetic grain oriented steel sheet with low level loss by magnetic reversal and high polarisation | |
| CN103998629A (en) | High silicon steel sheet having excellent productivity and magnetic properties and method for manufacturing same | |
| CN103305748A (en) | Non-oriented electrical steel plate and manufacturing method thereof | |
| CN107723591A (en) | A kind of new-energy automobile motor cold rolling non-oriented electrical steel and its production method | |
| JPS5920731B2 (en) | Manufacturing method for electric iron plates with excellent magnetic properties | |
| CN105256226A (en) | Cold-rolled non-oriented silicon steel low in iron loss and production method | |
| CN107058874A (en) | A kind of method that non-oriented silicon steel with high magnetic induction thin slab product is prepared based on thin strap continuous casting | |
| CN110777299A (en) | Ce-containing high-magnetic-induction non-oriented silicon steel and preparation method thereof | |
| MX2014008493A (en) | Electrical steel processing without a post cold-rolling intermediate anneal. | |
| CN108504952B (en) | The method of thin slab continuous casting and rolling production new-energy automobile non-oriented electrical steel | |
| CN109868349B (en) | Method for producing full-process cold-rolled non-oriented electrical steel 35WD1900 by adopting ultra-fast cooling process | |
| CN109182907B (en) | Method for producing semi-process non-oriented electrical steel by endless rolling | |
| WO2021238895A1 (en) | Low-cost non-oriented electrical steel plate with extremely low aluminum content, and preparation method therefor | |
| CN114703421A (en) | High-phosphorus high-magnetic-induction non-oriented silicon steel and production method thereof | |
| JPH0841542A (en) | Production of nonoriented silicon steel sheet excellent in magnetic property | |
| JPH0841541A (en) | Production of nonoriented silicon steel sheet excellent in magnetic property | |
| CN101748253A (en) | Preparation method of low-temperature GO-oriented silicon steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200211 |