A continuous annealing device for producing low aging pre-plated nickel steel strip

Abstract

The utility model discloses a continuous annealing device for low time effectiveness pre -plated nickel steel strip production, including base, the top of base is installed with shell, the other side of shell is provided with the entrance, the inside installation of shell has the cold roll, the one end of base is installed with control mechanism, and the control mechanism includes the control board installation in the one end of base, and the one end of control board is installed with display screen, and the inside installation of control board has treater, and the one end of control board is installed with button. The utility model discloses the project is aimed at solving the long -term effective problem of pre -plated nickel steel strip time effectiveness, and through the cooperation of component and technology, reduces or eliminates the free carbon nitrogen atom content, makes C, N gap atom with stable form of carbon nitride exists in steel strip, and the main advantage of low time effectiveness pre -plated nickel steel strip is reflected in: solid solution C, N atom most can be fixed in the steel strip production process, fundamentally avoids the adverse effect of time effectiveness, satisfies the demand of market to pre -plated nickel steel strip time effectiveness problem.

Description

Technical Field

[0001] This utility model relates to the field of nickel-plated steel strip production technology, and in particular to a continuous annealing device for producing low-aging pre-plated nickel-plated steel strip. Background Technology

[0002] In recent years, the cylindrical lithium battery industry has developed rapidly, especially after Tesla launched its 4680 series large cylindrical lithium battery, leading to a surge in demand for pre-plated nickel-coated battery steel strips. However, after leaving the factory, pre-plated nickel-coated steel strips often exhibit aging after being placed or stored at room temperature for a period of time. Aging refers to the spontaneous change in the strength, hardness, and especially ductility and toughness of steel caused by the leaching of alloying elements with diffusion capabilities from the solid solution within a certain timeframe. For pre-plated nickel-coated steel strips, aging enhances embrittlement. This increases the yield strength during subsequent stamping processes, making deformation and elongation difficult, and causing quality defects such as wrinkling and cracking on the surface, severely affecting subsequent use. Therefore, the performance changes caused by aging are often detrimental, and the aging problem of pre-plated nickel-coated steel strips urgently needs to be addressed.

[0003] To address this, the specification of patent CN222389880U discloses a continuous annealing device for high-strength steel strip, including an annealing chamber. An impurity removal chamber is provided on the outer surface of the annealing chamber, and a connecting port is provided on the outer surface of the annealing chamber. The interior of the annealing chamber is fixedly connected to the interior of the impurity removal chamber through the connecting port. Three No. 1 connecting seats are fixedly installed inside the impurity removal chamber. In this continuous annealing device for high-strength steel strip, after the steel strip body is annealed in the annealing chamber, it enters the impurity removal chamber through the connecting port. Then, through the intermediate gaps corresponding to the three upper and lower cleaning rollers, the worker controls the torque handle to rotate the threaded rollers, adjusting the gaps formed by the upper and lower cleaning rollers to ensure sufficient contact between the upper and lower cleaning rollers and the steel strip body. This prevents dust and slag from adhering to the surface of the steel strip, which would affect the subsequent processing of the steel strip.

[0004] 1. The aforementioned high-strength steel strip continuous annealing device ensures sufficient contact between the upper and lower cleaning rollers and the steel strip body, thereby preventing dust and slag from adhering to the steel strip surface and affecting subsequent processing. However, pre-nickel-plated steel strips generally exhibit aging. To address this aging issue, it is generally recommended that customers use such products as early as possible to avoid prolonged storage and aging, which would affect the stamping yield. However, in actual production, due to production planning and inventory requirements, customers often only begin using the steel coils some time after the products have been in storage. This places higher demands on the aging properties of pre-nickel-plated steel strips. In actual industrial production, to eliminate the aging properties of pre-nickel-plated steel, a leveling method is generally used to break the Cochrane atmosphere, allowing dislocations to break free from the pinning of the atmosphere and become more mobile. This will soften the material and eliminate yield strength in the short term. However, the leveling method can only solve the problem temporarily. After a period of storage or placement, the free C and N atoms in the pre-nickel-plated steel strip will re-aggregate at the dislocation sites to form Cochrane atmospheres, causing the dislocations to be pinned again, resulting in a renewed increase in the yield strength of the steel strip and the re-aging process. Utility Model Content

[0005] The purpose of this invention is to provide a continuous annealing device for the production of low-aging pre-plated nickel steel strip, in order to solve the defect of poor annealing effect of existing continuous annealing devices for the production of pre-plated nickel steel strip.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a continuous annealing device for the production of low-aging pre-plated nickel steel strip, including a base;

[0007] The base is fitted with a housing at its top, with an outlet on one side and an inlet on the other side.

[0008] The shell has a partition installed inside, and temperature control modules are embedded at both ends of the shell. Temperature sensors are installed at both ends of the shell. Cold rolling rollers are installed inside the shell. A control mechanism is installed at one end of the base.

[0009] The control mechanism includes a control board mounted on one end of the base, a display screen mounted on one end of the control board, a processor installed inside the control board, and buttons mounted on one end of the control board.

[0010] When in use, the content of free carbon and nitrogen atoms is reduced or eliminated by combining the composition and process, so that the C and N interstitial atoms exist in the steel strip in the stable form of carbonitrides. The main advantages of low-aging pre-plated nickel steel strip are: most of the C and N atoms dissolved in the steel strip can be fixed during the production process, which fundamentally avoids the adverse effects of aging and meets the market demand for the aging problem of pre-plated nickel steel strip. After the nickel-plated steel strip enters the shell through the inlet, it can be moved and cold-rolled by the rotation of the cold rolling roll. After annealing, the nickel-plated steel strip can be discharged through the outlet.

[0011] Furthermore, a leveling structure is installed inside the outer casing. The leveling structure includes a fixing plate installed inside the outer casing, a second spring installed at the top of the fixing plate, a moving block installed at the top of the second spring, a leveling wheel installed at the top of the moving block, and a damper installed at the bottom of the moving block. The leveling wheel can level the nickel-plated steel strip.

[0012] Furthermore, the second spring is helical in shape, and the second spring and the moving block form an elastic connection, with the second spring being elastic.

[0013] Furthermore, a cleaning structure is installed inside the entrance, and the cleaning structure includes a first spring installed inside the entrance, a lifting block installed at the bottom end of the first spring, and a brush installed at the bottom end of the lifting block, the brush being able to clean the nickel-plated steel strip.

[0014] Furthermore, a guide rod is installed at the top of the lifting block, and the guide rod is symmetrically distributed about the central axis of the lifting block. The guide rod can prevent the lifting block from shifting.

[0015] Furthermore, the outer diameter of the lifting block is smaller than the inner diameter of the inlet, and the lifting block and the inlet form a sliding structure, allowing the lifting block to move up and down inside the inlet.

[0016] Furthermore, indicator lights are installed at the top of the control board, and the indicator lights are arranged at equal intervals at the top of the control board. The operation of the indicator lights can indicate the operation of the device.

[0017] The continuous annealing apparatus for producing low-aging pre-plated nickel steel strip provided by this utility model has the following advantages: This project aims to solve the long-term effectiveness problem of pre-plated nickel steel strip aging. Through the combination of composition and process, the content of free carbon and nitrogen atoms is reduced or eliminated, so that C and N interstitial atoms exist in the steel strip in a stable form of carbonitrides. The main advantage of low-aging pre-plated nickel steel strip is that most of the dissolved C and N atoms can be fixed during the steel strip production process, which fundamentally avoids the adverse effects of aging and meets the market demand for addressing the aging problem of pre-plated nickel steel strip.

[0018] A temperature sensor is installed inside the casing to detect the internal temperature. The casing is divided into spaces by a partition. Buttons on the control panel control the device's operation, and the processor processes the information. The internal temperature is displayed on the screen, and indicator lights indicate the device's operating status. The temperature control module can be adjusted based on the displayed temperature to control the internal temperature. Unlike bell-type annealing, continuous annealing involves shorter high-temperature homogenization time and faster cooling rate. Therefore, it is essential to strictly control the chemical composition of the raw materials to maintain C, N interstitial solute atoms, and other solute elements at low levels, facilitating the precipitation of carbides and AlN during subsequent annealing. The amount of cold rolling deformation is related to the subsequent continuous annealing performance of the steel strip. Different cold rolling reduction rates of cold rolling rolls result in different deformation energy storage, which can provide driving force for subsequent annealing. Therefore, before nickel plating, the rolling stroke and passes should be reasonably allocated, and various parameters of the rolling process should be controlled to improve the mechanical properties and surface quality of the material. Over-aging treatment is based on our company's continuous annealing production line. Compared with traditional bell-type annealing, steel strips processed through the aging section can avoid problems such as steel sticking and uneven performance, resulting in steel strips with consistent performance and a smooth surface. This continuous annealing unit contains an induction preheating section, a heating section, a soaking section, a cooling section, an over-aging section, and a final cooling section. During heating, the carbon content in the substrate... The carbide structure is partially or completely dissolved. After soaking heat treatment, the dissolution of carbon reaches equilibrium. However, during the subsequent cooling process, the high cooling rate hinders the precipitation of solid solution carbon, causing the carbide precipitation in the cooling stage to deviate from equilibrium. After a period of time, supersaturated carbon and nitrogen atoms accumulate and pin at dislocations, forming Cotillard atmospheres, which reduce the ductility and deep drawing performance of pre-plated nickel steel strip. Only by adjusting the over-aging parameters can the content of supersaturated solid solution carbon be controlled, so that carbon and nitrogen interstitial atoms can form carbides and nitrides to precipitate, thereby eliminating the influence of Cotillard atmospheres and giving the steel strip excellent anti-aging properties. This achieves the purpose of improving the annealing effect of the continuous annealing device in the production of pre-plated nickel steel strip. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 This is a front view cross-sectional structural diagram of the present invention;

[0021] Figure 3 For the present utility model Figure 2 Enlarged cross-sectional view of point A in the middle section;

[0022] Figure 4 This is a partial three-dimensional structural diagram of the cleaning structure of this utility model;

[0023] Figure 5This is a schematic diagram of a partial cross-sectional view of the flat structure of this utility model.

[0024] The following are the annotations in the diagram: 1. Outer shell; 2. Cleaning structure; 201. Lifting block; 202. Brush; 203. First spring; 204. Guide rod; 3. Inlet; 4. Cold rolling roll; 5. Leveling structure; 501. Fixed plate; 502. Moving block; 503. Leveling wheel; 504. Second spring; 505. Damper; 6. Base; 7. Control mechanism; 701. Control board; 702. Button; 703. Indicator light; 704. Display screen; 705. Processor; 8. Outlet; 9. Temperature sensor; 10. Temperature control module; 11. Partition. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5 One embodiment of this utility model is a continuous annealing device for producing low-aging pre-plated nickel steel strip, comprising a base 6.

[0027] The top of the base 6 is fitted with a housing 1. Inside the housing 1, a flat structure 5 is installed. The flat structure 5 includes a fixing plate 501 installed inside the housing 1. A second spring 504 is installed at the top of the fixing plate 501. The second spring 504 is spiral in shape. The second spring 504 and the moving block 502 form an elastic connection.

[0028] The top of the second spring 504 is equipped with a movable block 502, and the top of the movable block 502 is equipped with a flat wheel 503. The bottom of the movable block 502 is equipped with a damper 505.

[0029] See attached document Figure 2 and attached Figure 5As shown, the fixed plate 501 and the moving block 502 are connected by a second spring 504. The damper 505 can enhance the effect of the spring. The second spring 504 will drive the leveling wheel 503 to press against the surface of the nickel-plated steel strip. The leveling wheel 503 can level the passing nickel-plated steel strip. Leveling can cause a small amount of plastic deformation to the pre-nickel-plated steel strip, so that the yield plateau disappears temporarily. In addition, it can improve the strip shape, making the strip shape straighter. According to customer needs, the surface roughness of the pre-nickel-plated steel strip can be given to improve the surface quality. In this process, by controlling the various parameters of the leveling section, the optimal leveling process can be obtained, enhancing the mechanical properties and anti-aging properties of the steel strip.

[0030] An outlet 8 is provided on one side of the outer casing 1, and an inlet 3 is provided on the other side of the outer casing 1. A cleaning structure 2 is installed inside the inlet 3, and the cleaning structure 2 includes a first spring 203 installed inside the inlet 3. A lifting block 201 is installed at the bottom end of the first spring 203, and a guide rod 204 is installed at the top end of the lifting block 201. The guide rod 204 is symmetrically distributed about the central axis of the lifting block 201.

[0031] The outer diameter of the lifting block 201 is smaller than the inner diameter of the inlet 3. The lifting block 201 and the inlet 3 form a sliding structure. A brush 202 is installed at the bottom of the lifting block 201.

[0032] See attached document Figure 1-2 and attached Figure 4 As shown, the lifting block 201 inside the inlet 3 can slide inside the inlet 3. The first spring 203 is elastic, and the elasticity of the first spring 203 will drive the lifting block 201 to rise and fall. The rise and fall of the lifting block 201 can allow the brush 202 to press on the surface of the nickel-plated steel strip. When the nickel-plated steel strip passes through the brush 202, the brush 202 can clean the surface of the nickel-plated steel strip. The guide rod 204 can extend and retract, and the guide rod 204 can prevent the lifting block 201 from deviating. After the nickel-plated steel strip enters the interior of the outer shell 1 through the inlet 3, it can be moved and cold-rolled by the rotation of the cold rolling roller 4. After annealing, the nickel-plated steel strip can be discharged through the outlet 8.

[0033] The shell 1 has a partition 11 installed inside, and temperature control modules 10 are embedded at both ends inside the shell 1. Temperature sensors 9 are installed at both ends inside the shell 1. Cold rolling rollers 4 are installed inside the shell 1. A control mechanism 7 is installed at one end of the base 6.

[0034] The control mechanism 7 includes a control board 701 mounted on one end of the base 6. An indicator light 703 is mounted on the top of the control board 701, and the indicator lights 703 are arranged at equal intervals on the top of the control board 701.

[0035] A display screen 704 is installed at one end of the control board 701, a processor 705 is installed inside the control board 701, and a button 702 is installed at one end of the control board 701.

[0036] See attached document Figure 1-3 As shown, the temperature sensor 9 can sense the temperature inside the housing 1. The space inside the housing 1 is separated by a partition 11. The button 702 on the control board 701 can control the operation of the device. The processor 705 can process the information. The temperature inside the housing 1 can be displayed on the display screen 704. The indicator light 703 can indicate the working status of the device. The temperature control module 10 can be adjusted by the temperature display to control the temperature inside the housing 1. Unlike the bell-type annealing, the continuous annealing process has a shorter high-temperature homogenization time and a faster cooling rate. Therefore, it is necessary to strictly control the chemical composition of the raw materials to keep the C and N interstitial solute atoms and other solute elements at a low content level, so as to facilitate the precipitation of carbides and AlN in the subsequent annealing. The amount of cold rolling deformation is related to the subsequent continuous annealing performance of the steel strip. Different cold rolling reduction rates of the cold rolling rolls result in different deformation energy storage, which can provide driving force for subsequent annealing. Therefore, before nickel plating, the rolling stroke and passes should be reasonably allocated, and various parameters of the rolling process should be controlled to improve the mechanical properties and surface quality of the material. The over-aging treatment is based on our company's continuous annealing production line. Compared with traditional bell-type annealing, the steel strip processed through the aging section can avoid the problems of steel sticking and uneven performance, resulting in steel strip with consistent performance and a smooth surface. This continuous annealing unit contains an induction preheating section, a heating section, a soaking section, a cooling section, and an over-aging section. In the final cooling stage, the carbide structure in the substrate is partially or completely dissolved during heating. After soaking, the carbon dissolution reaches equilibrium. However, in the subsequent cooling process, the high cooling rate hinders the precipitation of solid solution carbon, causing the carbide precipitation in the cooling stage to deviate from equilibrium. After a period of time, supersaturated carbon and nitrogen atoms accumulate and pin at dislocations, forming Cotillard atmospheres, which reduce the ductility and deep drawing performance of the pre-plated nickel steel strip. Only by adjusting the over-aging parameters can the content of supersaturated solid solution carbon be controlled, so that carbon and nitrogen interstitial atoms can form carbides and nitrides to precipitate, thereby eliminating the influence of Cotillard atmospheres and giving the steel strip excellent anti-aging properties.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuous annealing apparatus for producing low-aging pre-plated nickel steel strip, comprising a base (6); Its features are: The top of the base (6) is fitted with a housing (1), and an outlet (8) is provided on one side of the housing (1) and an inlet (3) is provided on the other side of the housing (1). The shell (1) is equipped with a partition (11), and temperature control modules (10) are embedded in both ends of the shell (1). Temperature sensors (9) are installed in both ends of the shell (1). Cold rolling rolls (4) are installed inside the shell (1). A control mechanism (7) is installed at one end of the base (6). The control mechanism (7) includes a control board (701) mounted on one end of the base (6), a display screen (704) mounted on one end of the control board (701), a processor (705) installed inside the control board (701), and a button (702) mounted on one end of the control board (701).

2. The continuous annealing apparatus for producing low-aging pre-plated nickel steel strip according to claim 1, characterized in that: The shell (1) is equipped with a leveling structure (5). The leveling structure (5) includes a fixing plate (501) installed inside the shell (1). A second spring (504) is installed at the top of the fixing plate (501). A moving block (502) is installed at the top of the second spring (504). A leveling wheel (503) is installed at the top of the moving block (502). A damper (505) is installed at the bottom of the moving block (502).

3. The continuous annealing apparatus for producing low-aging pre-plated nickel steel strip according to claim 2, characterized in that: The second spring (504) is spiral in shape, and the second spring (504) and the moving block (502) form an elastic connection.

4. The continuous annealing apparatus for producing low-aging pre-plated nickel steel strip according to claim 1, characterized in that: A cleaning structure (2) is installed inside the entrance (3), and the cleaning structure (2) includes a first spring (203) installed inside the entrance (3), a lifting block (201) is installed at the bottom end of the first spring (203), and a brush (202) is installed at the bottom end of the lifting block (201).

5. The continuous annealing apparatus for producing low-aging pre-plated nickel steel strip according to claim 4, characterized in that: The top of the lifting block (201) is equipped with a guide rod (204), and the guide rod (204) is symmetrically distributed about the central axis of the lifting block (201).

6. The continuous annealing apparatus for producing low-aging pre-plated nickel steel strip according to claim 4, characterized in that: The outer diameter of the lifting block (201) is smaller than the inner diameter of the inlet (3), and the lifting block (201) and the inlet (3) form a sliding structure.

7. The continuous annealing apparatus for producing low-aging pre-plated nickel steel strip according to claim 1, characterized in that: The top of the control board (701) is equipped with indicator lights (703), and the indicator lights (703) are arranged at equal intervals on the top of the control board (701).

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