CN112605122A - Processing method for improving edge quality of silicon steel hot rolled plate - Google Patents
Processing method for improving edge quality of silicon steel hot rolled plate Download PDFInfo
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- CN112605122A CN112605122A CN202011484475.4A CN202011484475A CN112605122A CN 112605122 A CN112605122 A CN 112605122A CN 202011484475 A CN202011484475 A CN 202011484475A CN 112605122 A CN112605122 A CN 112605122A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
Abstract
The invention belongs to the technical field of silicon steel manufacturing, and particularly relates to a processing method for improving the edge quality of a silicon steel hot rolled plate, which comprises the following steps: continuous casting, pre-deformation treatment of a casting blank, heating treatment of the casting blank and hot rolling treatment; wherein the casting blank pre-deformation treatment comprises the following steps: applying pressure to two side walls of the casting blank along the length direction through vertical rollers at the temperature of 500-900 ℃ until the deformation h is 10-50 mm; the heating temperature of the casting blank heating treatment is 1100-1200 ℃, and the heat preservation time is 4-6 h. According to the processing method for improving the quality of the edge part of the silicon steel hot rolled plate, provided by the invention, the side pressing process of the two side walls of the casting blank is adopted, the defect of edge part cracks of the hot rolled plate is effectively overcome, the plasticity of the edge part is improved, the yield is improved, and the production cost is reduced.
Description
Technical Field
The invention belongs to the technical field of silicon steel manufacturing, and particularly relates to a processing method for improving the edge quality of a silicon steel hot rolled plate.
Background
Silicon steel generally contains a high silicon content and a low carbon content in order to provide excellent electromagnetic properties. However, higher silicon content increases material brittleness and increases rolling difficulty. In the process of preparing silicon steel, a continuous casting step usually forms a coarse columnar crystal structure on the surface layer of a casting blank (as shown in fig. 2); because the temperature drop of the edge part of the casting blank in the hot rolling step is large, the surface layer of the casting blank is thick columnar crystal, and the formed hot rolled plate has poor plasticity and serious edge crack defect. In order to prevent cold rolling strip breakage caused by edge cracks of a hot rolled sheet, it is often necessary to subject the hot rolled sheet to a trimming process, thereby reducing production efficiency and increasing production costs. At present, in order to solve the edge crack defect of the hot rolled plate, the prior art generally adopts means of improving equipment to increase electromagnetic stirring and perform edge heating to improve the edge crack defect of the hot rolled plate, but the actual effect is not obvious.
Therefore, a processing method for improving the edge quality of a hot-rolled silicon steel plate is needed to overcome the edge crack defect of the hot-rolled silicon steel plate and reduce the production cost.
Disclosure of Invention
In view of the above problems, the present invention provides a processing method for improving the edge quality of a hot-rolled silicon steel sheet. According to the processing method for improving the edge quality of the silicon steel hot rolled plate, provided by the invention, the side pressure technology of the two side walls of the casting blank (applying pressure to the two side walls of the casting blank along the length direction) is adopted, so that the defect of edge cracks of the hot rolled plate can be overcome, the edge structure is improved, the edge plasticity is improved, the yield is improved and the production cost is reduced under the condition that a cold rolling and edge cutting rolling process is not required.
The technical scheme of the invention for realizing the purpose is as follows:
in one aspect of the present invention, there is provided a processing method for improving edge quality of a hot-rolled silicon steel sheet, comprising: continuous casting, casting blank pre-deformation treatment (after the continuous casting is finished, the casting blank is subjected to casting blank heating treatment and edge pre-deformation treatment), casting blank heating treatment and hot rolling treatment, wherein:
the casting blank pre-deformation treatment comprises the following steps: applying pressure to two side walls of the casting blank along the length direction through vertical rolls at the temperature of 500-900 ℃ (in a side pressure mode as shown in figure 1) until the deformation amount h (as shown in figure 1) is 10-50 mm;
the heating temperature of the casting blank heating treatment is 1100-1200 ℃, and the heat preservation time is 4-6 h.
In some embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel plate, the temperature of the casting blank is 400-750 ℃ before the casting blank is subjected to heating treatment (before the casting blank subjected to casting blank pre-deformation treatment enters a heating furnace).
In some preferred embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel plate, the temperature of the casting blank is 750-850 ℃ in the pre-deformation treatment process of the casting blank, and the deformation amount h is 26-42 mm.
In some more preferred embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel sheet, the temperature of the cast slab is 845 ℃ during the pre-deformation treatment of the cast slab, and the deformation amount h is 39 mm.
In some preferred embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel plate, the heating temperature of the billet heating treatment is 1155 ℃, and the holding time is 5 hours.
In some embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel sheet, the hot rolling treatment is performed within 40 seconds after the completion of the heating of the cast slab;
in the hot rolling process, the initial rolling temperature of rough rolling is 1090-1200 ℃, and the final rolling temperature of rough rolling is 990-1090 ℃.
In some embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel sheet, the hot rolling treatment is performed within 40 seconds after the completion of the heating of the cast slab;
in the hot rolling process, the initial rolling temperature of rough rolling is 1180-1190 ℃, and the final rolling temperature of rough rolling is 1070-1090 ℃.
In some preferred embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel sheet, the initial rolling temperature of the rough rolling is 1100 ℃ and the final rolling temperature of the rough rolling is 1000 ℃ during the hot rolling treatment.
In some embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel plate, the superheat degree of the continuous casting molten steel is 15-35 ℃ in the continuous casting process.
In some embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel sheet, the rolling force of the vertical roll is 50-300 tons.
In some embodiments of the invention, in the processing method for improving the edge quality of a hot-rolled silicon steel sheet, the cast slab comprises, by mass: 0.001-0.08% of C, 0.0015-0.005% of S, 2.0-4.0% of Si, 0.01-2% of Al, and the balance of Fe and inevitable impurities.
The inventor aims at the invention and finds that: the abnormal growth phenomenon of the columnar crystal structure (as shown in figure 5) is easy to occur after the columnar crystal structure on the surface layer of the silicon steel continuous casting billet is heated by a heating furnace; on the other hand, when hot rolling is performed, dynamic recrystallization tends to form a mixed crystal structure in which a coarse columnar crystal structure and a fine equiaxed crystal structure coexist at the edge of the hot-rolled sheet (as shown in fig. 6). The deformation of the uneven mixed crystal structure is not coordinated, so that the edge cracks of the hot rolled plate can be initiated and expanded, and finally the edge cracks of the hot rolled plate can be caused. The method is used for reducing the columnar crystal structure at the side part of the side wall of the casting blank by a certain amount so as to destroy the columnar crystal structure and form a deformation structure with higher storage energy. When the plate blank is heated in a heating furnace, a large amount of nuclei of the unstable deformation structure are generated and recrystallized, so that a refined isometric crystal structure is formed at the edge of the plate blank.
One or more technical embodiments of the present invention have at least the following technical effects or advantages:
(1) according to the processing method for improving the edge quality of the silicon steel hot rolled plate, a step of pre-deformation treatment (a lateral pressure technology aiming at two side walls of a casting blank) of the casting blank is added between continuous casting and heating treatment of the casting blank, and the coarse columnar crystal structure at the edge of the casting blank is crushed by controlling the deformation amount of the pre-deformation treatment so as to form a high-energy deformation structure (shown in figure 3); and then, conveying the pre-deformed casting blank into a heating furnace for casting blank heating treatment, wherein the edge of the casting blank subjected to the casting blank heating treatment can form a fine and uniform recrystallization structure (as shown in figure 4), and then carrying out a hot rolling process. Therefore, the processing method for improving the edge quality of the hot-rolled silicon steel plate provided by the invention can solve the defect of edge cracks of the hot-rolled plate under the condition of not needing a cold rolling and trimming rolling process, improve the problem that the edge structure is abnormally thick before rough rolling of a casting blank (as shown in figure 7), improve the edge plasticity, improve the yield and reduce the production cost.
(2) The processing method for improving the edge quality of the hot-rolled silicon steel plate provided by the invention solves the edge crack defect caused by the mixed crystal phenomenon of the edge temperature drop and the coarse edge structure of the hot-rolled silicon steel plate, and improves the plate shape of the hot-rolled silicon steel plate without cold rolling and trimming.
(3) According to the processing method for improving the edge quality of the silicon steel hot rolled plate, the hot rolled coil with excellent edge plate shape can be obtained, the edge cutting process of the hot rolled coil is reduced, the cold rolling burr rolling is realized, and the yield and the production efficiency are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic view illustrating a pre-deformation treatment of a casting slab in a processing method for improving edge quality of a hot-rolled silicon steel sheet according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the formation of coarse columnar structures on the surface of a cast slab formed in the prior art;
FIG. 3 is a schematic view showing a cross-sectional deformed structure of a cast slab formed by a processing method for improving edge quality of a hot-rolled silicon steel sheet according to an embodiment of the present invention;
FIG. 4 is a schematic view showing a cross-sectional recrystallized structure of a cast slab formed by a processing method for improving the edge quality of a hot-rolled silicon steel sheet according to an embodiment of the present invention;
FIG. 5 is a schematic view showing a structure of a cast slab before and after heat treatment in the prior art;
FIG. 6 shows a gold phase diagram of a hot rolled plate edge crack structure formed by the prior art;
FIG. 7 is a schematic view showing a structure of a cast slab pretreated by a vertical roll according to the prior art after heating;
fig. 8 is a graph showing the effect of the hot-rolled sheet edge improved by the processing method for improving the quality of the hot-rolled sheet edge of silicon steel according to the embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
In order to solve the technical problems, the embodiment of the invention provides the following general ideas:
in one aspect of the present invention, there is provided a processing method for improving edge quality of a hot-rolled silicon steel sheet, comprising: continuous casting, casting blank pre-deformation treatment, casting blank heating treatment and hot rolling treatment, wherein:
the casting blank pre-deformation treatment comprises the following steps: applying pressure to two side walls of the casting blank along the length direction through vertical rolls at the temperature of 500-900 ℃ until the deformation h is 10-50 mm (in a side pressure mode as shown in figure 1);
the heating temperature of the casting blank heating treatment is 1100-1200 ℃, and the heat preservation time is 4-6 h.
The processing method for improving the edge quality of the silicon steel hot rolled plate provided by the invention is used for pressing a specific deformation amount at a specific temperature aiming at the columnar crystal structure at the edge of the side wall of a casting blank so as to destroy the columnar crystal structure and form a deformation structure with higher storage energy. Then when the plate is heated in a heating furnace, the unstable deformation structure can be nucleated in a large amount and recrystallized, so that a refined isometric crystal structure is formed at the edge of a casting blank, the problem of abnormal growth of columnar crystals is solved, the defect of edge cracks of a hot rolled plate is effectively overcome, and the rolling performance of the plate blank is obviously improved.
In some embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel plate, the temperature of the casting blank is 400-750 ℃ before the casting blank is subjected to heating treatment (before the casting blank subjected to casting blank pre-deformation treatment enters a heating furnace).
Through a large number of screening tests, the temperature of the casting blank subjected to casting blank pre-deformation treatment before entering a heating furnace is 400-750 ℃, and the edge of the casting blank can be more effectively promoted to form a refined isometric crystal structure in the temperature interval, so that abnormal growth of columnar crystals is inhibited; the hot rolled coil with excellent edge plate shape can be obtained, the edge cutting process of the hot rolled coil is reduced, the cold rolling rough edge rolling is realized, and the yield and the production efficiency are improved.
In some preferred embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel plate, the temperature of the casting blank is 750-850 ℃ in the pre-deformation treatment process of the casting blank, and the deformation amount h is 26-42 mm.
In order to further improve the defect of edge cracks of a hot rolled plate, the temperature of the casting blank is 750-850 ℃ and the deformation h is 26-42 mm in the pre-deformation treatment process of the casting blank through a series of balance optimization, so that the quality of edge tissues is obviously improved, and the edge plasticity is improved.
In some more preferred embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel sheet, the temperature of the cast slab is 845 ℃ during the pre-deformation treatment of the cast slab, and the deformation amount h is 39 mm.
The inventor further optimizes the pre-deformation treatment process of the casting blank in order to improve the edge crack defect of the hot rolled plate to the maximum extent, and limits the temperature of the casting blank to 845 ℃, and the deformation h to 39 mm.
In some preferred embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel plate, the heating temperature of the billet heating treatment is 1155 ℃, and the holding time is 5 hours.
In order to obviously improve the edge plasticity of the hot rolled plate, the heating temperature of the casting blank heating treatment is optimized to be 1155 ℃, and the heat preservation time is 5 hours, so that the temperature of the furnace is ensured, the maximum grain size of recrystallization after the furnace is discharged is controlled to be less than 10mm, and the edge plasticity of the hot rolled plate is obviously improved.
In some embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel sheet, the hot rolling treatment is performed within 40 seconds after the completion of the heating of the cast slab;
in the hot rolling process, the initial rolling temperature of rough rolling is 1090-1200 ℃, and the final rolling temperature of rough rolling is 990-1090 ℃.
In some embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel sheet, the hot rolling treatment is performed within 40 seconds after the completion of the heating of the cast slab;
in the hot rolling process, the initial rolling temperature of rough rolling is 1180-1190 ℃, and the final rolling temperature of rough rolling is 1070-1090 ℃.
In some preferred embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel sheet, the initial rolling temperature of rough rolling is 1100 ℃ and the final rolling temperature of rough rolling is 1000 ℃ during the hot rolling treatment.
In some embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel plate, the superheat degree of the continuous casting molten steel is 15-35 ℃ in the continuous casting process.
In some embodiments of the invention, in the processing method for improving the edge quality of the hot-rolled silicon steel sheet, the rolling force of the vertical roll is 50-300 tons.
In some embodiments of the invention, in the processing method for improving the edge quality of a hot-rolled silicon steel sheet, the cast slab comprises, by mass: 0.001-0.08% of C, 0.0015-0.005% of S, 2.0-4.0% of Si, 0.01-2% of Al, and the balance of Fe and inevitable impurities.
The working method for improving the edge quality of a hot-rolled silicon steel sheet according to the present invention will be described in detail with reference to examples, comparative examples, and experimental data.
Example 1:
this example uses 8 test groups. In test groups 1 to 8, the processing method for improving the edge quality of the silicon steel hot rolled plate provided by some embodiments of the invention comprises the following steps: continuous casting, pre-deformation treatment of a casting blank, heating treatment of the casting blank and hot rolling treatment;
(1) continuous casting; wherein the superheat degree of the continuous casting molten steel is 15-35 ℃;
(2) pre-deforming a casting blank; applying pressure to two side walls of the casting blank along the length direction through vertical rolls (optional convex vertical rolls) at the temperature of 500-900 ℃ (more preferably 750-850 ℃), until the deformation h is 10-50 mm (more preferably 26-42 mm); the rolling force of the vertical roll is 50-300 tons;
fig. 1 shows a manner of applying pressure to both side walls of the cast slab in the longitudinal direction by means of vertical rolls (optionally, convex vertical rolls). In fig. 1, 1 denotes a slab, 2 denotes a vertical roll, and h denotes an amount of deformation.
(3) Heating a casting blank; wherein before the heating treatment (before entering a heating furnace), the temperature of the casting blank is 400-750 ℃; then, heating the casting blank at 1100-1200 ℃ for 4-6 h;
(4) hot rolling treatment; wherein the hot rolling treatment is carried out within 40 seconds after the step (3) is completed, the initial rolling temperature of rough rolling is 1090-1200 ℃, and the final rolling temperature of the rough rolling is 990-1090 ℃; preferably, the initial rolling temperature of rough rolling is 1180-1190 ℃, and the final rolling temperature of the rough rolling is 1070-1090 ℃; further preferably, the initial rolling temperature of the rough rolling is 1100 ℃, and the final rolling temperature of the rough rolling is 1000 ℃.
Wherein, by mass percent, the casting blank comprises: 0.001-0.08% of C, 0.0015-0.005% of S, 2.0-4.0% of Si, 0.01-2% of Al, and the balance of Fe and inevitable impurities.
The specific process parameters for the 8 test groups in this example are shown in tables 1 and 2:
table 1: some embodiments of the invention provide process parameters of the processing method
Table 2: some embodiments of the invention provide process parameters of the processing method
Wherein, the casting blank comprises the chemical components shown in the table 3 according to the mass percentage;
table 3: example 1 test groups 1-8 chemical compositions of casting blanks
| Serial number | C(％) | S(％) | Si(％) | Al(％) |
| |
0.0010 | 0.0023 | 2.1 | 0.5 |
| |
0.0030 | 0.0020 | 4.0 | 2 |
| Test group 3 | 0.0025 | 0.0015 | 2.9 | 0.9 |
| Test group 4 | 0.0035 | 0.0022 | 2.5 | 1.3 |
| Test group 5 | 0.06 | 0.0045 | 3.4 | 0.015 |
| Test group 6 | 0.073 | 0.003 | 3.5 | 0.010 |
| Test group 7 | 0.065 | 0.005 | 2.0 | 0.020 |
| Test group 8 | 0.08 | 0.004 | 3.6 | 0.010 |
Comparative example 1:
the comparative example 1 adopts 5 comparison groups, and continuous casting, casting blank pre-deformation treatment, casting blank heating treatment and hot rolling treatment are adopted in the comparison groups 1-2; in comparative groups 3 to 5, continuous casting, heating of a casting blank and hot rolling were performed.
The specific process parameters of comparative examples 1-2 are shown in tables 4 and 5:
table 4: process parameters of comparative groups 1-2
Table 5: process parameters of comparative groups 1-2
Specific process parameters of comparative examples 3 to 5 (not subjected to the casting blank pre-deformation treatment) in comparative example 1 are shown in tables 6 and 7:
table 6: process parameters of comparative groups 3 to 5
Table 7: process parameters of comparative groups 3 to 5
Wherein, the chemical components contained in the casting blanks in comparative examples 1 to 5 in the comparative example 1 are shown in table 8;
table 8: casting blank chemical components of comparative groups 1 to 5 in comparative example 1
| Serial number | C(％) | S(％) | Si(％) | Al(％) |
| |
0.0010 | 0.0023 | 2.1 | 0.5 |
| |
0.0030 | 0.0020 | 4.0 | 2 |
| Comparative group 3 | 0.0025 | 0.0015 | 2.9 | 0.9 |
| Comparative group 4 | 0.0035 | 0.0022 | 2.5 | 1.3 |
| Comparative group 5 | 0.06 | 0.0045 | 3.4 | 0.015 |
The hot-rolled sheets prepared in example 1 and comparative example 1 were subjected to performance tests, respectively, and the results of comparison are shown in Table 9:
table 9: results of the Performance test of the hot rolled sheets obtained by the processing methods of example 1 and comparative example 1
As can be seen from the above comparison of the test groups 1 to 8 in inventive example 1 with the comparative groups 1 to 5 in comparative example 1: the processing method for improving the edge quality of the silicon steel hot rolled plate, provided by the invention, is characterized in that aiming at the columnar crystal structure at the edge part of the side wall of a casting blank, a step of pre-deformation treatment of the casting blank is added, namely, a specific deformation amount is pressed at a specific temperature, and further, the temperature and the deformation amount of the casting blank in the pre-deformation treatment process of the casting blank are optimized so as to destroy the columnar crystal structure and form a deformation structure with higher storage energy; then, by a series of subsequent casting blank heating treatment and hot rolling treatment processes, a refined isometric crystal structure is formed at the edge of the casting blank, so that the defects of abnormal growth of columnar crystals and edge cracks of a hot rolled plate are overcome, and the rolling performance of the plate blank is remarkably improved, as shown in table 9.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A processing method for improving the edge quality of a silicon steel hot rolled plate comprises the following steps: continuous casting, casting blank predeformation treatment, casting blank heating treatment and hot rolling treatment, and is characterized in that:
the casting blank pre-deformation treatment comprises the following steps: applying pressure to two side walls of the casting blank along the length direction through vertical rollers at the temperature of 500-900 ℃ until the deformation h is 10-50 mm;
the heating temperature of the casting blank heating treatment is 1100-1200 ℃, and the heat preservation time is 4-6 h.
2. The processing method for improving the edge quality of the hot-rolled silicon steel sheet according to claim 1, wherein the temperature of the ingot is 400 to 750 ℃ before the ingot is heated.
3. The processing method for improving the edge quality of the hot-rolled silicon steel plate according to claim 1 or 2, wherein the temperature of the cast slab is 750 to 850 ℃ and the deformation amount h is 26 to 42mm in the pre-deformation treatment of the cast slab.
4. The processing method for improving the edge quality of the hot-rolled silicon steel plate as claimed in claim 3, wherein the temperature of the casting blank is 845 ℃ and the deformation h is 39mm in the process of the pre-deformation treatment of the casting blank.
5. The processing method for improving the edge quality of the hot-rolled silicon steel plate according to claim 1 or 2, wherein the heating temperature of the casting blank heating treatment is 1155 ℃, and the holding time is 5 hours.
6. The processing method for improving the edge quality of the hot-rolled silicon steel sheet according to claim 1 or 2, wherein the hot rolling treatment is performed within 40 seconds after the completion of the heating of the cast slab;
in the hot rolling process, the initial rolling temperature of rough rolling is 1090-1200 ℃, and the final rolling temperature of rough rolling is 990-1090 ℃.
7. The processing method for improving the edge quality of the hot-rolled silicon steel plate as claimed in claim 6, wherein the initial rolling temperature of the rough rolling is 1100 ℃, and the final rolling temperature of the rough rolling is 1000 ℃.
8. The processing method for improving the edge quality of the hot-rolled silicon steel plate according to claim 1 or 2, wherein the superheat degree of the continuous casting molten steel in the continuous casting process is 15-35 ℃.
9. The processing method for improving the edge quality of the hot-rolled silicon steel sheet according to claim 1 or 2, wherein the rolling force of the vertical rolls is 50 to 300 tons.
10. The processing method for improving the edge quality of a hot-rolled silicon steel sheet according to claim 1 or 2, wherein the cast slab comprises, in mass percent: 0.001-0.08% of C, 0.0015-0.005% of S, 2.0-4.0% of Si, 0.01-2% of Al, and the balance of Fe and inevitable impurities.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06172860A (en) * | 1992-09-17 | 1994-06-21 | Nippon Steel Corp | Stable production of grain oriented silicon steel sheet having high magnetic flux density |
| CN101545072A (en) * | 2008-03-25 | 2009-09-30 | 宝山钢铁股份有限公司 | Method for producing oriented silicon steel having high electromagnetic performance |
| CN101811134A (en) * | 2010-01-26 | 2010-08-25 | 宁波钢铁有限公司 | Manufacture method for preventing edge crack generated during low-carbon cold rolling of paper-thin strip steel |
| CN102392198A (en) * | 2011-11-02 | 2012-03-28 | 江苏昊达有限责任公司 | Preparation method of non-oriented thin silicon steel strip for motor |
| CN102626714A (en) * | 2012-04-16 | 2012-08-08 | 新兴铸管股份有限公司 | Pre-deforming process for improving quality of hollow blank |
| CN103302104A (en) * | 2012-03-13 | 2013-09-18 | 宝山钢铁股份有限公司 | Method for manufacturing hot rolled silicon steel |
| CN104525886A (en) * | 2015-01-27 | 2015-04-22 | 上海东震冶金工程技术有限公司 | Method for improving crack defects of edges and corners of casting blank |
| CN109261718A (en) * | 2018-09-05 | 2019-01-25 | 鞍钢股份有限公司 | The milling method of edge line defect is eliminated in a kind of production of silicon steel |
| CN109261717A (en) * | 2018-09-05 | 2019-01-25 | 鞍钢股份有限公司 | The milling method of product quality of edges is improved in a kind of production of cold rolled silicon steel |
| CN111530926A (en) * | 2020-04-27 | 2020-08-14 | 湖南华菱涟源钢铁有限公司 | Control method for peeling edge of strip steel in rough rolling and strip steel |
-
2020
- 2020-12-15 CN CN202011484475.4A patent/CN112605122B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06172860A (en) * | 1992-09-17 | 1994-06-21 | Nippon Steel Corp | Stable production of grain oriented silicon steel sheet having high magnetic flux density |
| CN101545072A (en) * | 2008-03-25 | 2009-09-30 | 宝山钢铁股份有限公司 | Method for producing oriented silicon steel having high electromagnetic performance |
| CN101811134A (en) * | 2010-01-26 | 2010-08-25 | 宁波钢铁有限公司 | Manufacture method for preventing edge crack generated during low-carbon cold rolling of paper-thin strip steel |
| CN102392198A (en) * | 2011-11-02 | 2012-03-28 | 江苏昊达有限责任公司 | Preparation method of non-oriented thin silicon steel strip for motor |
| CN103302104A (en) * | 2012-03-13 | 2013-09-18 | 宝山钢铁股份有限公司 | Method for manufacturing hot rolled silicon steel |
| CN102626714A (en) * | 2012-04-16 | 2012-08-08 | 新兴铸管股份有限公司 | Pre-deforming process for improving quality of hollow blank |
| CN104525886A (en) * | 2015-01-27 | 2015-04-22 | 上海东震冶金工程技术有限公司 | Method for improving crack defects of edges and corners of casting blank |
| CN109261718A (en) * | 2018-09-05 | 2019-01-25 | 鞍钢股份有限公司 | The milling method of edge line defect is eliminated in a kind of production of silicon steel |
| CN109261717A (en) * | 2018-09-05 | 2019-01-25 | 鞍钢股份有限公司 | The milling method of product quality of edges is improved in a kind of production of cold rolled silicon steel |
| CN111530926A (en) * | 2020-04-27 | 2020-08-14 | 湖南华菱涟源钢铁有限公司 | Control method for peeling edge of strip steel in rough rolling and strip steel |
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