CN118147426A - Method for eliminating edge crack defect of oriented silicon steel - Google Patents
Method for eliminating edge crack defect of oriented silicon steel Download PDFInfo
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- CN118147426A CN118147426A CN202410297306.1A CN202410297306A CN118147426A CN 118147426 A CN118147426 A CN 118147426A CN 202410297306 A CN202410297306 A CN 202410297306A CN 118147426 A CN118147426 A CN 118147426A
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- Prior art keywords
- silicon steel
- oriented silicon
- edge crack
- eliminating
- edge
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- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000007547 defect Effects 0.000 title claims abstract description 26
- 238000000576 coating method Methods 0.000 claims abstract description 16
- 238000000137 annealing Methods 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract description 3
- 238000005728 strengthening Methods 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 235000007627 Caesalpinia Nutrition 0.000 description 2
- 241000522234 Caesalpinia Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
A method for eliminating edge crack defect of oriented silicon steel relates to the field of metallurgy. The method for eliminating the edge crack defect of the oriented silicon steel comprises the following steps: scoring the bottoms of two sides of the annealed oriented silicon steel along the length direction to obtain score lines, wherein the distance between the score lines and the edges of the corresponding sides of the oriented silicon steel is 9-11mm. According to the method for eliminating the edge crack defect of the oriented silicon steel, disclosed by the application, the shearing band and dislocation are formed by selecting the position with the maximum tension for physical scoring before the magnesium oxide coating is coated after the oriented silicon steel is annealed, so that abnormal growth of grains at the scoring position is prevented in the high-temperature annealing process, the effect of fine grain strengthening is realized, the occurrence probability of edge grain extension and edge crack of the edge grains of the oriented silicon steel is further eliminated, and the quality of the oriented silicon steel is improved.
Description
Technical Field
The application relates to the field of metallurgy, in particular to a method for eliminating edge crack defects of oriented silicon steel.
Background
The oriented silicon steel is widely popularized and used due to mature production process, low energy consumption and low price, and oriented silicon steel manufacturers are continuously increasing the production speed to meet the market demands, but the problem of edge quality is also caused in the process of increasing the production speed of the oriented silicon steel.
When the oriented silicon steel is subjected to high-temperature annealing in an annular furnace after being continuously annealed and coiled, the bottom of a steel coil can collapse downwards under the action of high-temperature creep deformation to cause serious deformation of the steel plate, so that edge crack defects are shown as shown in figure 1 after being quenched after being discharged from the furnace, and the production stability, the product quality and the use of users are seriously affected.
Disclosure of Invention
The application aims to provide a method for eliminating edge crack defects of oriented silicon steel, which can reduce the occurrence rate of edge crack of the oriented silicon steel and improve the quality of the oriented silicon steel.
The application is realized in the following way:
the application provides a method for eliminating edge crack defects of oriented silicon steel, which comprises the following steps:
scoring the bottoms of two sides of the annealed oriented silicon steel along the length direction to obtain score lines, wherein the distance between the score lines and the edges of the corresponding sides of the oriented silicon steel is 9-11mm.
In some alternative embodiments, a nicking tool is used to nick the bottom of both sides of the oriented silicon steel.
In some alternative embodiments, the score line has a depth of 0.05-0.1mm.
In some alternative embodiments, two score lines are symmetrically arranged at the bottoms of two sides of the oriented silicon steel.
In some alternative embodiments, the nicking tool is positioned between the annealing furnace and a coating roll for coating a magnesium oxide coating on the annealed surface of the oriented silicon steel.
The beneficial effects of the application are as follows: the method for eliminating the edge crack defect of the oriented silicon steel provided by the application comprises the following steps: scoring the bottoms of two sides of the annealed oriented silicon steel along the length direction to obtain score lines, wherein the distance between the score lines and the edges of the corresponding sides of the oriented silicon steel is 9-11mm. According to the method for eliminating the edge crack defect of the oriented silicon steel, disclosed by the application, the shearing band and dislocation are formed by selecting the position with the maximum tension for physical scoring before the magnesium oxide coating is coated after the oriented silicon steel is annealed, so that abnormal growth of grains at the scoring position is prevented in the high-temperature annealing process, the effect of fine grain strengthening is realized, the occurrence probability of edge grain extension and edge crack of the edge grains of the oriented silicon steel is further eliminated, and the quality of the oriented silicon steel is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of edge cracking in the prior art of oriented silicon steel production;
FIG. 2 is a schematic diagram of a method for eliminating edge crack defects in oriented silicon steel, in which a notch cutter is used to score an oriented silicon steel strip from an annealing furnace to a coating roll;
FIG. 3 is a schematic diagram of a nicking tool scoring one side of an oriented silicon steel strip in a method for eliminating edge crack defects in an oriented silicon steel according to an embodiment of the present application;
FIG. 4 is a schematic diagram of one side of an oriented silicon steel strip scored to obtain a score line in the method for eliminating edge crack defects of the oriented silicon steel according to the embodiment of the present application;
FIG. 5 is a schematic diagram showing fine grains on one side of an oriented silicon steel strip scored to obtain a scored line in the method for eliminating edge crack defects of the oriented silicon steel according to the embodiment of the present application.
In the figure: 100. annealing furnace; 110. oriented silicon steel strip; 120. a coating roller; 130. a nicking tool; 140. score lines.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the product of the application, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The method for eliminating edge crack defects of oriented silicon steel according to the present application is characterized and characterized in further detail by the following examples.
As shown in fig. 2 and 3, an embodiment of the present application provides a method for eliminating edge crack defect of oriented silicon steel, which includes the following steps:
Two nicking tools 130 with upward edges are arranged between the annealing furnace 100 and a pair of coating rollers 120 arranged up and down, so that the nicking tools 130 nick the bottoms of two sides of the oriented silicon steel strip 110 annealed by the annealing furnace 100 along the length direction respectively to obtain nicking lines 140, and the distances between the two nicking lines 140 and the edges of the two sides corresponding to the oriented silicon steel strip 110 are 9-11mm respectively, wherein the depth of the nicking lines 140 is 0.05-0.1mm. Optionally, two score lines 140 are symmetrically disposed at the bottoms of two sides of the oriented silicon steel strip 110.
The annealing furnace 100 is used for withdrawing the oriented silicon steel strip 110, and a pair of coating rolls 120 arranged up and down are used for coating the upper and lower surfaces of the oriented silicon steel strip 110 with magnesium oxide coatings.
According to the method for eliminating the edge crack defect of the oriented silicon steel, in the continuous annealing process, two nickers 130 positioned between the annealing furnace 100 and the coating roller 120 are arranged below the oriented silicon steel strip 110 of the annealing furnace 100, and the positions with the largest tension on the two sides of the oriented silicon steel strip 110 (namely, the positions with the distance of 9-11mm from the edges of the two sides of the oriented silicon steel strip 110) are selected to be physically scored to form the score line 140 by using the two nickers 130, so that shear bands and dislocation are formed on the two sides of the oriented silicon steel strip 110, and abnormal grain growth at the score line 140 is prevented in the high-temperature annealing process, so that the effect of realizing fine grain strengthening is shown in fig. 4 and 5, and the edge grain edge crack of the oriented silicon steel strip 110 is eliminated.
The method for eliminating the edge crack defect of the oriented silicon steel provided by the embodiment of the application does not change the production process and the production rhythm of the oriented silicon steel, and only a pair of engraving devices are additionally arranged to score the oriented silicon steel strip 110 between the annealing process and the coating process, so that the edge crack occurrence probability of the rolled finished oriented silicon steel product can be effectively reduced, and the quality of an oriented silicon steel object is improved.
After the method for eliminating the edge crack defect of the oriented silicon steel provided by the embodiment of the application is used in actual production, the edge crack defect of the prepared oriented silicon steel is basically eliminated, the running speed of a stretching and leveling unit can be improved by 10%, the edge shearing amount of a finishing process is reduced by 20mm, the yield can be improved by about 1%, and the economic benefit can be effectively improved.
The embodiments described above are some, but not all embodiments of the application. The detailed description of the embodiments of the application is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Claims (5)
1. The method for eliminating the edge crack defect of the oriented silicon steel is characterized by comprising the following steps of:
scoring the bottoms of two sides of the annealed oriented silicon steel along the length direction to obtain score lines, wherein the distance between the score lines and the edges of the corresponding sides of the oriented silicon steel is 9-11mm.
2. The method of eliminating edge crack defects in oriented silicon steel according to claim 1, wherein the bottom portions of both sides of the oriented silicon steel are scored using a nicking tool.
3. The method of eliminating edge crack defects in oriented silicon steel as set forth in claim 1, wherein the depth of the score line is 0.05-0.1mm.
4. The method for eliminating edge crack defects of oriented silicon steel according to claim 1, wherein two score lines are symmetrically arranged at bottoms of two sides of the oriented silicon steel.
5. The method of eliminating edge crack defects in oriented silicon steel as set forth in claim 1 wherein said nicking tool is located between said annealing furnace and a coating roll for coating a magnesium oxide coating on the surface of said annealed oriented silicon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410297306.1A CN118147426A (en) | 2024-03-15 | 2024-03-15 | Method for eliminating edge crack defect of oriented silicon steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410297306.1A CN118147426A (en) | 2024-03-15 | 2024-03-15 | Method for eliminating edge crack defect of oriented silicon steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118147426A true CN118147426A (en) | 2024-06-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410297306.1A Pending CN118147426A (en) | 2024-03-15 | 2024-03-15 | Method for eliminating edge crack defect of oriented silicon steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118147426A (en) |
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2024
- 2024-03-15 CN CN202410297306.1A patent/CN118147426A/en active Pending
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