Method and system for reducing flatness defects of grain-oriented silicon steel
By wrapping the adjustment material on the outer ring of the oriented silicon steel coil and performing high-temperature annealing treatment, the problem of plate shape defects of oriented silicon steel during high-temperature annealing is solved, and the quality of the finished product and the yield rate are improved.
Patent Information
- Application Number
- CN202310245908.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-03-14
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2043-03-14
AI Technical Summary
The outer ring of oriented silicon steel is prone to collapse during high-temperature annealing, resulting in plate shape defects, affecting product quality and user use.
The outer ring of the oriented silicon steel coil is wrapped with a predetermined thickness of adjusting material, such as carbon steel coated with magnesium oxide, and wrapped with a tension greater than 7N/mm2 using an uncoiler, followed by high-temperature annealing.
It effectively eliminates the defects of warping and middle wave shape, improves the yield rate of finished products and enhances product quality, and reduces plate shape defects.
Smart Images
Figure CN116287624B_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of production and manufacturing of grain-oriented silicon steel, and in particular relates to a method and system for reducing plate shape defects of grain-oriented silicon steel. Background Art
[0002] With the continued advancement of China's dual carbon policy, grain-oriented silicon steel, due to its mature production process and low price, has played a significant role as a steel material in reducing energy consumption during the dual carbon reduction process. The use of grain-oriented silicon steel is continuously expanding, and various grain-oriented silicon steel manufacturers are continuously increasing production to meet market demand. However, during this process of speed increase, the flatness problem of grain-oriented silicon steel has gradually become prominent.
[0003] After the oriented silicon steel is coiled and annealed at high temperature in a ring furnace, the outer ring of the steel coil will collapse downward under the action of high-temperature creep, causing serious deformation of the steel plate. If the deformation cannot be eliminated in subsequent processes, plate shape defects will appear, seriously affecting product quality and user use. Summary of the Invention
[0004] The embodiments of the present application provide a method and system for reducing the flatness defects of grain-oriented silicon steel, thereby being able to reduce the flatness defects of grain-oriented silicon steel finished products.
[0005] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by practice of the present application.
[0006] According to a first aspect of an embodiment of the present application, a method for reducing flatness defects of grain-oriented silicon steel is provided, the method comprising:
[0007] The oriented silicon steel after continuous annealing is coiled by a coiler to obtain an oriented silicon steel coil;
[0008] The material with preset thickness is coated and then loaded onto the uncoiler;
[0009] The processed shaped material is wrapped around the outer ring of the grain-oriented silicon steel coil by the uncoiler.
[0010] In some embodiments of the present application, based on the aforementioned solution, the coating of the adjustment material having a preset thickness includes:
[0011] The adjustment material of the preset thickness is coated with magnesium oxide.
[0012] In some embodiments of the present application, based on the aforementioned solution, the preset thickness is greater than 0.5 mm.
[0013] In some embodiments of the present application, based on the above solution, wrapping the processed adjusted material onto the outer ring of the oriented silicon steel coil by the uncoiler includes:
[0014] The processed adjustment material is wrapped onto the outer ring of the oriented silicon steel coil with a preset tension by the uncoiler, wherein the preset tension is greater than 7N / mm 2 .
[0015] In some embodiments of the present application, based on the aforementioned solution, the adjustment material is carbon steel.
[0016] In some embodiments of the present application, based on the above solution, after the processed adjustment material is wrapped around the outer ring of the grain-oriented silicon steel coil by the uncoiler, the method further includes:
[0017] The wrapped oriented silicon steel coil is subjected to high temperature annealing treatment.
[0018] According to a second aspect of an embodiment of the present application, a system for reducing flatness defects of grain-oriented silicon steel is provided, the system comprising:
[0019] The first coiler and the second coiler are both used to coil the oriented silicon steel after continuous annealing to obtain oriented silicon steel coils;
[0020] The uncoiler is used to wrap the coating-treated adjusted material with a preset thickness onto the outer ring of the oriented silicon steel coil.
[0021] In some embodiments of the present application, based on the aforementioned solution, the number of the uncoiler is 1, and the uncoiler is arranged between the first coiler and the second coiler.
[0022] In some embodiments of the present application, based on the aforementioned solution, the coating is magnesium oxide, and the preset thickness is greater than 0.5 mm.
[0023] In some embodiments of the present application, based on the above solution, the uncoiler is further used to wrap with a preset tension, wherein the preset tension is greater than 7N / mm 2 .
[0024] In this application, a coiler is used to coil the continuously annealed grain-oriented silicon steel to produce a grain-oriented silicon steel coil. A pre-coated trimming material of a predetermined thickness is then fed to an uncoiler. The uncoiler then wraps the pre-coated trimming material around the outer ring of the grain-oriented silicon steel coil. Because the coated trimming material serves as the outer ring of the grain-oriented silicon steel coil and withstands thermal creep during the high-temperature annealing process, shape defects in the grain-oriented silicon steel are effectively reduced.
[0025] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, serving to explain the principles of the present application. It is obvious that the drawings described below are merely some embodiments of the present application, and a person of ordinary skill in the art can derive other drawings based on these drawings without inventive effort. In the drawings:
[0027] Figure 1 Schematic diagram of a production system for grain-oriented silicon steel in the prior art;
[0028] Figure 2 Schematic diagram of the plate shape defect of the outer ring of the oriented silicon steel coil in the prior art;
[0029] Figure 3 Schematic diagram of a system for reducing flatness defects of grain-oriented silicon steel according to an embodiment;
[0030] Figure 4 A schematic diagram of the shape of the outer ring of an oriented silicon steel coil produced by using the method for reducing shape defects of oriented silicon steel in one embodiment;
[0031] Figure 5 Schematic diagram of a process for reducing flatness defects of grain-oriented silicon steel according to one embodiment;
[0032] Figure 6 This is a schematic diagram of the morphology of the outer ring of the oriented silicon steel coil after high-temperature annealing in the prior art;
[0033] Figure 7 A schematic diagram of the morphology of the outer ring of an oriented silicon steel coil produced by the method for reducing flat defects of oriented silicon steel after high-temperature annealing in one embodiment;
[0034] Figure 8 Schematic diagram of a process for reducing flatness defects of grain-oriented silicon steel in another embodiment. DETAILED DESCRIPTION
[0035] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0036] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps etc. can be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.
[0037] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.
[0038] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.
[0039] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described.
[0040] Figure 1 Schematic diagram of the production system of oriented silicon steel in the prior art, as shown in FIG. Figure 1 As shown, in the prior art, the steel strip formed of oriented silicon steel is coiled by two sets of coilers, and the wrapping operation of the oriented material cannot be performed.
[0041] Figure 2 Schematic diagram of the plate shape defect of the outer ring of the oriented silicon steel coil in the prior art, as shown in FIG. Figure 2 As shown, using Figure 1 The outer ring of the oriented silicon steel coil produced by the medium system is prone to plate shape defects such as buckling and middle wave shape.
[0042] Figure 3 FIG. 1 is a schematic diagram of a system for reducing flatness defects of grain-oriented silicon steel according to an embodiment of the present invention. Figure 3As shown, the system for reducing flatness defects in grain-oriented silicon steel includes a first coiler and a second coiler, both used to coil steel strip formed from continuously annealed grain-oriented silicon steel to produce a grain-oriented silicon steel coil; and an uncoiler, used to wrap a coating-treated, pre-set-thickness conditioning material around the outer ring of the grain-oriented silicon steel coil. This solution, while maintaining the existing grain-oriented silicon steel production process, utilizes the newly added uncoiler to wrap the conditioning material around the outer ring of the grain-oriented silicon steel coil after the coiler completes the coiling operation. This transfers areas of the outer ring of the grain-oriented silicon steel coil susceptible to high-temperature creep to the conditioning material, thereby reducing flatness defects in the primary material. Figure 4 FIG. 1 is a schematic diagram of the plate shape of the outer ring of an oriented silicon steel coil produced by a method for reducing plate shape defects of oriented silicon steel in one embodiment. Figure 4 As shown in the figure, by wrapping the adjustment material to the outer ring of the oriented silicon steel coil, the buckling and middle wave defects are completely eliminated, and the plate shape defects of the outer ring of the oriented silicon steel coil are greatly reduced.
[0043] In one embodiment, Figure 5 As shown, a method for reducing flatness defects of grain-oriented silicon steel is provided, which may include the following steps:
[0044] Step 501: coiling the oriented silicon steel after continuous annealing by a coiler to obtain an oriented silicon steel coil.
[0045] Among them, oriented silicon steel, also known as cold-rolled transformer steel, is an important ferrosilicon alloy. Its production process is complex and its manufacturing technology is strict. It is mainly divided into ordinary oriented silicon steel and high magnetic induction oriented silicon steel.
[0046] A coiler is an auxiliary equipment in a rolling mill that coils hot-rolled or cold-rolled steel into a coil. It is typically located after the finishing stand in hot strip mills, cold strip mills, and wire rod mills, and before or after the mill in single-stand reversing cold strip mills. Coilers can also be installed in various finishing lines, such as continuous pickling lines, slitting lines, annealing lines, and coating lines. This embodiment does not restrict the location of the coiler.
[0047] The production process for grain-oriented silicon steel requires continuous annealing, followed by coiling on a coiler to obtain a coil, which is then sent to a ring furnace for high-temperature annealing. This process can easily lead to outer ring defects such as warping and central waving. This embodiment, after the oriented silicon steel coil is obtained, wraps it with a conditioning material to eliminate these warping and central waving defects, significantly reducing outer ring defects.
[0048] In step 502 , the material having a preset thickness is coated and then loaded onto a decoiler.
[0049] In a specific implementation, a roll of adjustment material can be produced during downtime such as maintenance, and the adjustment material can be coated and loaded onto the uncoiler.
[0050] The preset thickness may be greater than 0.5 mm. Of course, the thicker the thickness is, the better the effect of reducing plate shape defects will be.
[0051] The adjustment material can be waste carbon steel. Using waste carbon steel as the adjustment material can effectively reduce production costs.
[0052] When the adjustment material is subjected to coating treatment, the adjustment material may be coated with magnesium oxide. By coating with magnesium oxide, adhesion during the high-temperature annealing process can be effectively avoided.
[0053] Step 503: Wrap the processed adjusted material onto the outer ring of the grain-oriented silicon steel coil by the uncoiler.
[0054] In the specific implementation, the waiting time can be used to wrap the adjustment material. In the process of wrapping the adjustment material, it is necessary to use a preset tension for wrapping. In order to achieve a good wrapping effect, the preset tension needs to be a larger tension, such as greater than 7N / mm 2 tension.
[0055] In one embodiment, the method for reducing shape defects of grain-oriented silicon steel may further include the following step: performing high-temperature annealing on the wrapped grain-oriented silicon steel coil.
[0056] Figure 6 This is a schematic diagram of the morphology of the outer ring of the oriented silicon steel coil after high temperature annealing in the prior art. Figure 6 As shown, in the prior art, the outer ring of the oriented silicon steel coil is severely burned after high-temperature annealing, and the steel strip is severely deformed and needs to be cut and scrapped.
[0057] Figure 7 FIG. 1 is a schematic diagram of the morphology of the outer ring of an oriented silicon steel coil produced by the method for reducing the plate shape defects of oriented silicon steel after high temperature annealing in one embodiment. Figure 7 As shown in the figure, after wrapping the adjustment material, in the high-temperature annealing process, the burned part of the outer ring of the oriented silicon steel coil is only the adjustment material, and the normal material is not affected. After the adjustment material is cut off in the finished product process, the normal material does not need to be cut off again, and the yield rate is effectively improved.
[0058] In this embodiment, the oriented silicon steel after continuous annealing is coiled using a coiler to produce an oriented silicon steel coil. A pre-coated trimming material of a predetermined thickness is then loaded onto an uncoiler. The uncoiler then wraps the pre-coated trimming material around the outer ring of the oriented silicon steel coil. Because the coated trimming material serves as the outer ring of the oriented silicon steel coil and withstands the thermal creep of the high-temperature annealing process, it eliminates warping and corrugated defects in the lead, effectively reducing flatness defects in the oriented silicon steel. Furthermore, the discarded trimming material is effectively used to replace the burned portion of the original outer ring, eliminating burnt material. This increases the yield rate of oriented silicon steel in the finished product process by approximately 1%.
[0059] Figure 8 FIG. 1 is a flow chart of a method for reducing flatness defects of grain-oriented silicon steel according to another embodiment. Figure 8 As shown, the method for reducing the flatness defects of grain-oriented silicon steel may include the following steps:
[0060] Step 801, coiling the oriented silicon steel after continuous annealing by a coiler to obtain an oriented silicon steel coil;
[0061] Step 802: Coat the trimming material with a thickness greater than 0.5 mm with magnesium oxide and then feed it to the uncoiler;
[0062] Step 803: The processed material is adjusted by the uncoiler with a pressure greater than 7N / mm 2 The tension is wrapped around the outer ring of the oriented silicon steel coil.
[0063] In this embodiment, after the oriented silicon steel completes continuous annealing, the outer ring area of the oriented silicon steel coil that is prone to high-temperature creep is transferred to the adjustment material, thereby reducing the plate shape defects of the normal material and improving the output of oriented silicon steel genuine products.
[0064] Return to reference Figure 3 Based on the same concept, this embodiment also proposes a system for reducing the plate shape defects of oriented silicon steel. The system for reducing the plate shape defects of oriented silicon steel includes a first coiler and a second coiler, both of which are used to coil the oriented silicon steel after continuous annealing to obtain an oriented silicon steel coil; an uncoiler is used to wrap the adjustment material of a preset thickness after coating treatment onto the outer ring of the oriented silicon steel coil.
[0065] It should be understood that the number of uncoilers may correspond one-to-one to the number of coilers, or may be less than the number of coilers, and this embodiment does not impose any limitation on this.
[0066] In one example, the number of the uncoiler is 1, and the uncoiler is disposed between the first coiler and the second coiler.
[0067] It should be noted that in order to reduce costs, a new uncoiler can be designed between the first coiler and the second coiler. The uncoiler has a two-way uncoiling function. After the first coiler or the second coiler completes the coiling operation, the uncoiler is used to wrap the adjusted material onto the outer ring of the oriented silicon steel coil to be unloaded.
[0068] In one example, the preset thickness may be greater than 0.5 mm. Of course, the thicker the thickness is, the better the effect of reducing plate shape defects.
[0069] In one example, the adjustment material is a steel strip, specifically waste carbon steel. Using it as the adjustment material can effectively reduce costs.
[0070] In one example, the coating may be magnesium oxide. By coating magnesium oxide, adhesion during a high-temperature annealing process can be effectively avoided.
[0071] In one example, the uncoiler is further configured to wrap with a preset tension, wherein the preset tension is greater than 7 N / mm 2 By using a larger tension during the wrapping process of the adjustment material, a good wrapping effect can be achieved.
[0072] Without changing the original production organization model of oriented silicon steel, this embodiment adds a decoiler to enable it to have the function of wrapping the adjustment material, thereby effectively eliminating plate defects such as warping and wavy shapes, and effectively improving the actual quality of the product. At the same time, this solution also effectively utilizes discarded adjustment materials to improve the yield rate of genuine oriented silicon steel.
[0073] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.
[0074] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of the claims of the present application.
Claims
1. A method for reducing flatness defects of grain-oriented silicon steel, characterized in that: The method comprises: The oriented silicon steel after continuous annealing is coiled by a coiler to obtain an oriented silicon steel coil; The material with preset thickness is coated and then loaded onto the uncoiler; The processed adjustment material is wrapped around the outer ring of the grain-oriented silicon steel coil by the uncoiler; wherein the adjustment material is carbon steel; The coating of the adjustment material with a preset thickness includes: The adjustment material of the preset thickness is coated with magnesium oxide.
2. The method according to claim 1, characterized in that The preset thickness is greater than 0.5 mm.
3. The method according to claim 1, characterized in that The step of wrapping the processed adjusted material onto the outer ring of the oriented silicon steel coil by the uncoiler comprises: The processed adjustment material is wrapped onto the outer ring of the oriented silicon steel coil with a preset tension by the uncoiler, wherein the preset tension is greater than 7N / mm 2 .
4. The method according to claim 1, wherein After the processed adjustment material is wrapped around the outer ring of the oriented silicon steel coil by the uncoiler, the method further includes: The wrapped oriented silicon steel coil is subjected to high temperature annealing treatment.
5. A system for reducing flatness defects of grain-oriented silicon steel, characterized in that: The system comprises: The first coiler and the second coiler are both used to coil the oriented silicon steel after continuous annealing to obtain oriented silicon steel coils; The uncoiler is used to wrap the coating-treated adjustment material of preset thickness onto the outer ring of the oriented silicon steel coil; wherein the coating is magnesium oxide and the adjustment material is carbon steel.
6. The system according to claim 5, characterized in that The number of the uncoiler is one, and the uncoiler is arranged between the first coiler and the second coiler.
7. The system according to claim 6, characterized in that The preset thickness is greater than 0.5 mm.
8. The system according to claim 7, characterized in that The uncoiler is also used to wrap with a preset tension, wherein the preset tension is greater than 7N / mm 2 .