A cold-rolled semi-annealed steel strip manufacturing method, device and storage medium

Abstract

The application relates to a cold-rolled semi-annealed strip steel processing and manufacturing method, device and storage medium, and the method comprises the following steps: obtaining a cold-rolled semi-annealed strip steel; performing acid continuous rolling shape control on the cold-rolled semi-annealed strip steel; performing galvanizing process annealing furnace temperature control on the cold-rolled semi-annealed strip steel; and performing zinc pot area edge zinc layer uniformity control on the cold-rolled semi-annealed strip steel. The cold-rolled semi-annealed strip steel processing and manufacturing method, device and storage medium provided by the application successfully develop a cold-rolled galvanized semi-annealed strip steel bright plate, meanwhile, the variety structure of cold-formed products is enriched, the flatness of the strip steel is improved, stress concentration in the welding process of parts is reduced, a bright finishing machine variable elongation control technology based on constant performance in the whole rolling process is established, and the head and tail performance uniformity is improved.

Description

Technical Field

[0001] This application relates to the field of cold-rolled strip steel production, and in particular to a method, apparatus and storage medium for processing and manufacturing cold-rolled semi-annealed strip steel. Background Technology

[0002] Currently, the annual demand for light trucks in China is about 700,000 vehicles, indicating a large market demand. The materials for the corrugated panels, side panels, and floor plates of light truck cargo containers have high requirements for the cost, shape, and performance of hot-dip galvanized steel strips. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a method, apparatus and storage medium for processing and manufacturing cold-rolled semi-annealed strip steel.

[0004] In a first aspect, this application provides a method for processing and manufacturing cold-rolled semi-annealed strip steel, the method comprising the steps of:

[0005] Obtain cold-rolled semi-annealed strip steel;

[0006] The cold-rolled semi-annealed strip is subjected to pickling and continuous rolling shape control;

[0007] Temperature control of the annealing furnace for the galvanizing process of the cold-rolled semi-annealed strip steel;

[0008] The uniformity of the zinc layer at the edge of the zinc pot area is controlled for the cold-rolled semi-annealed strip.

[0009] Preferably, the step of controlling the shape of the cold-rolled semi-annealed strip by pickling and continuous rolling includes the following steps:

[0010] The shape curve for controlling the shape of the acid-rolled sheet;

[0011] Reduce the edge waviness of the cold-rolled semi-annealed strip;

[0012] Reduce the waviness of the cold-rolled semi-annealed strip;

[0013] Controlling the ribs of the cold-rolled semi-annealed strip.

[0014] Preferably, the formula for the shape curve control of the acid continuous rolling is:

[0015] Y = -5x 6 +x 4 +5x 2 +a0;

[0016] Where Y represents the amplitude of the plate curve, x represents the plate width, and a0 represents a constant.

[0017] Preferably, the amplitude of the edge wave is -5 IU.

[0018] Preferably, the amplitude of the intermediate wave is -5 IU.

[0019] Preferably, the amplitude of the rib wave is 5 IU.

[0020] Preferably, the temperature control of the annealing furnace during the galvanizing process of the cold-rolled semi-annealed strip includes the following steps:

[0021] Install edge baffles in the air knife area;

[0022] Adjust the distance between the edge of the strip and the edge baffle;

[0023] Obtain the zinc layer profile;

[0024] The position of the edge baffle relative to the upper and lower surfaces of the strip is automatically adjusted according to the zinc layer curve.

[0025] Secondly, this application provides a cold-rolled semi-annealed strip steel processing and manufacturing apparatus, comprising:

[0026] The strip steel acquisition module is used to acquire cold-rolled semi-annealed strip steel.

[0027] A strip shape control module is used to control the strip shape of the cold-rolled semi-annealed strip during pickling and rolling.

[0028] The temperature control module is used to control the temperature of the annealing furnace for the galvanizing process of the cold-rolled semi-annealed strip steel.

[0029] The uniformity control module is used to control the uniformity of the zinc layer at the edge of the zinc pot area of ​​the cold-rolled semi-annealed strip.

[0030] Thirdly, an electronic device is provided, the electronic device comprising:

[0031] At least one processor; and,

[0032] A memory communicatively connected to the at least one processor; wherein,

[0033] The memory stores instructions that can be executed by the at least one processor, which, when executed, enable the at least one processor to perform any of the aforementioned cold-rolled semi-annealed strip processing and manufacturing methods.

[0034] Fourthly, a non-transitory computer-readable storage medium is provided, which stores computer instructions for causing the computer to perform any of the aforementioned methods for processing and manufacturing cold-rolled semi-annealed strip steel.

[0035] The technical solutions provided in this application have the following advantages compared with the prior art:

[0036] This application provides a method, apparatus, and storage medium for processing and manufacturing cold-rolled semi-annealed strip steel. By adopting the above measures, it successfully developed bright cold-rolled galvanized semi-annealed strip steel, while enriching the product structure of cold-formed products. It improved the straightness of the strip steel, reduced stress concentration during component welding, established a variable elongation control technology for the finishing machine based on constant performance throughout the winding process, and improved the uniformity of performance at both ends. Attached Figure Description

[0037] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic flowchart of a cold-rolled semi-annealed strip steel processing and manufacturing method provided in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of a cold-rolled semi-annealed strip steel processing and manufacturing apparatus provided in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the structure of an electronic device provided by the present invention;

[0042] Figure 4 This is a schematic diagram of the structure of a non-transitory computer-readable storage medium provided by the present invention;

[0043] Figure 5 This is a schematic diagram of the target plate shape curve based on reducing the thickness of the zinc layer at the edge in a cold-rolled semi-annealed strip processing and manufacturing method provided in an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram simulating the grinding of the control rolls for the C-bend of a double-roller strip in a cold-rolled semi-annealed strip processing and manufacturing method provided in an embodiment of the present invention. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] Figure 1 This is a schematic flowchart illustrating a method for processing and manufacturing cold-rolled semi-annealed strip steel, provided as an embodiment of this application.

[0047] This application provides a method for processing and manufacturing cold-rolled semi-annealed strip steel, the method comprising the following steps:

[0048] S1: Obtain cold-rolled semi-annealed strip steel;

[0049] S2: Perform pickling and continuous rolling shape control on the cold-rolled semi-annealed strip steel;

[0050] In this embodiment of the application, the step of controlling the shape of the cold-rolled semi-annealed strip by pickling and continuous rolling includes the following steps:

[0051] The shape curve for controlling the shape of the acid-rolled sheet;

[0052] Reduce the edge waviness of the cold-rolled semi-annealed strip;

[0053] Reduce the waviness of the cold-rolled semi-annealed strip;

[0054] Controlling the ribs of the cold-rolled semi-annealed strip.

[0055] Specifically, the pre-straightening rate for acid continuous rolling is 0.6%, and the M-wave mode is used to control the shape during acid continuous rolling. The shape curve formula for acid continuous rolling shape control is as follows:

[0056] Y = -5x 6 +x 4 +5x 2 +a0;

[0057] Where Y represents the strip shape curve amplitude, x represents the strip width, and a0 represents a constant. Its characteristics include reducing edge and center waves in the strip, with edge wave amplitude at -5 IU, center wave amplitude at -5 IU, and strip rib wave amplitude controlled at 5 IU.

[0058] An edge weight compensation function was invented for the shape control of the acid rolling mill, which increases the calculation ratio of the edge channel shape deviation and amplifies the deviation ratio between the set value and the actual value during fitting. This is mainly to avoid excessive edge waviness.

[0059] yyweight[i]=yymin[i]×(edgeweight / 100.0)

[0060] In the formula, yyweight[i] is the edge weight fitting value, which is calculated as (feedback value - set value) × edge weight value. It is put into use when the actual value of the two edge channels is greater than the set value by 5 IU or the set value is less than the actual value by 10 IU. If edge compensation is enabled, it is applied in the two outermost regions; yy_min[i] is the detection deviation IU value of the deviation between the edge set value and the actual value; edgeweight is the edge weight coefficient, which in the formula is calculated as edge weight coefficient = edge thickness weight coefficient × edge width weight coefficient. The edge thickness weight is set according to different thicknesses. (1) When the strip thickness is 0.5-1.0mm, the edge thickness weight can be 300; (2) When the strip thickness is 1.0-1.5mm, the edge thickness weight can be 3.5; (3) When the strip thickness is 1.5-2.0mm, the edge thickness weight can be 400; (4) When the strip thickness is 2.0-2.5mm, the edge thickness weight can be 4.5; (5) When the strip thickness is 2.5-3.0mm, the edge thickness weight can be 5.0. The edge width weight is set according to different widths. (1) When the strip width is 700-900mm, the edge width weight can be 1.8; (2) When the strip width is 900-1100mm, the edge width weight can be 1.6; (3) When the strip width is 1100-1300mm, the edge width weight can be 1.4; (4) When the strip width is 1300-1500mm, the edge width weight can be 1.2; (5) When the strip width is 1500-1700mm, the edge width weight can be 1.0.

[0061] S3: Temperature control of the annealing furnace during the galvanizing process of the cold-rolled semi-annealed strip steel;

[0062] In this embodiment of the application, the temperature control of the annealing furnace for the galvanizing process of the cold-rolled semi-annealed strip includes the following steps:

[0063] Install edge baffles in the air knife area;

[0064] Adjust the distance between the edge of the strip and the edge baffle;

[0065] Obtain the zinc layer profile;

[0066] The position of the edge baffle relative to the upper and lower surfaces of the strip is automatically adjusted according to the zinc layer curve.

[0067] Specifically, to address the waviness caused by the thickening of the zinc layer at the edges, an initial distance of 2mm is set between the edge baffle and the edge of the strip in the air knife area. The position of the edge baffle relative to the upper and lower surfaces is automatically adjusted based on the observed zinc layer curve. Let the zinc layer thickness of the edge channel xi be yi, the target zinc layer thickness of the strip be ya, and D be the distance of the edge baffle from the upper and lower surfaces, where D = a1 × a2 × a3 × (yi - ya).

[0068] +2. Where a1 is the strip yield strength correlation coefficient, a2 is the strip width strength correlation coefficient, and a3 is the strip thickness correlation coefficient. The blind zone detection margin at the edge of the strip zinc coating is set to 25mm. The baffle is aligned with the horizontal plane of the strip, and the baffle position uses a circular arc locking mode.

[0069] S4: Control the uniformity of zinc layer at the edge of the zinc pot area of ​​the cold-rolled semi-annealed strip.

[0070] Specifically, the annealing furnace heating temperature is 700℃, the target temperature of the soaking zone is 700℃ to ensure the strip is in a semi-annealed state, the rapid cooling zone temperature is 580℃, and the final cooling zone temperature is 250℃. The maximum oxygen content in the annealing furnace is <10ppm, the maximum H2 content is <5%, and the dew point is between -70℃ and -25℃. When producing semi-annealed products, the cooling operation begins, and the heating zone setpoint is gradually reduced, with each reduction being no more than 30℃ lower than the current actual value, until it is reduced to 700℃.

[0071] Preheating Section: Reduce the temperature of zones 1 and 2 to 950℃, and set zone 3 to 1000℃. If the gas flow rate in either zone 1 or 2 is higher than 300 Nm³ / h, continue to reduce the temperature of that zone. When the gas flow rate in zone 1 is lower than 300 Nm³ / h, prepare to shut down the NOF zone 1 burner. If the gas flow rate in zones 1 and 2 is lower than 300 Nm³ / h, shut down the zone 1 burner. After shutting down the burners, adjust the exhaust damper to automatic. After 5-10 minutes of zone 1 burner shutdown, wait for the furnace pressure and temperature to stabilize before shutting down the preheating section zone 2 burner. The operation is the same as shutting down zone 1; adjust the exhaust damper first, then shut down the burner. After stabilization, adjust the zone 3 temperature; for annealing at 700℃, refer to the preheating section plate temperature of 500-600℃.

[0072] The target values ​​for overall flatness are 0.7%, tension leveling rate is 0.3%, and overall elongation is 1.0%. Due to performance issues with the strip at both ends, a variable elongation control mode is used for the first 100m. The elongation at the beginning of the strip is controlled by a slope, with the elongation set at 0.8%, the tension leveling rate target value at 0.3%, and the overall elongation target value at 1.1%. Following a pattern of decreasing the elongation by 0.1% within 100 meters, the elongation is reduced by 0.01% every 10 meters. Similarly, the target values ​​for the elongation at the end of the strip are 0.6%, the tension leveling rate target value at 0.3%, and the overall elongation target value at 0.9%. Following a pattern of decreasing the elongation by 0.1% within 100 meters, the elongation is reduced by 0.01% every 10 meters starting from the end of the strip.

[0073] Regarding the downward C-bend that appears on strip steel after finishing, it is believed that the upper surface of the strip elongates more than the lower surface after the finishing process, resulting in the downward C-bend. In this case, the upper surface elongates more than the lower surface. Therefore, a convex roller can be used for the upper roll and a flat roller for the lower roll. This increases the elongation of the lower surface, thus reducing the C-bend.

[0074] To address the issue of downward C-bends appearing on strip steel after finishing, the invented formula for the roll convexity function of the upper roll is R(x)=Lc×a3×(a2X2+a1X+R0), where x is the abscissa of the roll body length, R(x) is the roll radius of the roll body length abscissa x, Lc is the measured C-bend height of the strip steel / mm, a3 is the efficiency conversion relationship between the measured warp height and the convexity in the roll radius direction a3=0.005, a4=-0.215630E-7, a2=0.688073E-4, R0=0.179962E+3. In actual production, roll shapes with different convexities are ground according to the C-bend height of the strip steel, and a flat roll is used for the corresponding lower roll. For strip steel that exhibits an upward C-bend after finishing, the roll convexity function formula for the lower roll is R(x)=60000Lc×a3×(a4X4+a2X2+R0-0.899), and its coefficient value is consistent with the above coefficient. The corresponding upper roll is a flat roll.

[0075] like Figure 2 This application provides a cold-rolled semi-annealed strip steel processing and manufacturing apparatus, comprising:

[0076] Strip steel acquisition module 10 is used to acquire cold-rolled semi-annealed strip steel;

[0077] The strip shape control module 20 is used to control the strip shape of the cold-rolled semi-annealed strip during pickling and rolling.

[0078] Temperature control module 30 is used to control the temperature of the annealing furnace for the galvanizing process of the cold-rolled semi-annealed strip steel.

[0079] Uniformity control module 40 is used to control the uniformity of zinc layer at the edge of the zinc pot area of ​​the cold-rolled semi-annealed strip.

[0080] The cold-rolled semi-annealed strip steel processing and manufacturing apparatus provided in this application can perform the cold-rolled semi-annealed strip steel processing and manufacturing method provided in the above steps.

[0081] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

[0082] The following is for reference. Figure 3 The diagram illustrates a structural schematic of an electronic device 100 suitable for implementing embodiments of the present disclosure. The electronic devices in the embodiments of the present disclosure may include, but are not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 3 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments disclosed herein.

[0083] like Figure 3 As shown, the electronic device 100 may include a processing unit (e.g., a central processing unit, a graphics processing unit, etc.) 101, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 102 or a program loaded from a storage device 108 into a random access memory (RAM) 103. The RAM 103 also stores various programs and data required for the operation of the electronic device 100. The processing unit 101, ROM 102, and RAM 103 are interconnected via a bus 104. An input / output (I / O) interface 105 is also connected to the bus 104.

[0084] Typically, the following devices can be connected to I / O interface 105: input devices 106 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 107 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 108 including, for example, magnetic tapes, hard disks, etc.; and communication devices 109. Communication device 109 allows electronic device 100 to communicate wirelessly or wiredly with other devices to exchange data. Although electronic device 100 with various devices is shown in the figure, it should be understood that it is not required to implement or possess all of the devices shown. More or fewer devices may be implemented or possessed alternatively.

[0085] In particular, according to embodiments of this disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this disclosure include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication device 109, or installed from storage device 108, or installed from ROM 102. When the computer program is executed by processing device 101, it performs the functions defined in the methods of embodiments of this disclosure.

[0086] The following is for reference. Figure 4 It illustrates a schematic diagram of a computer-readable storage medium suitable for implementing embodiments of the present disclosure, the computer-readable storage medium storing a computer program that, when executed by a processor, can implement the cold-rolled semi-annealed strip processing and manufacturing method as described above.

[0087] This application provides a method, apparatus, and storage medium for processing and manufacturing cold-rolled semi-annealed strip steel. By adopting the above measures, it successfully developed bright cold-rolled galvanized semi-annealed strip steel, while enriching the product structure of cold-formed products. It improved the straightness of the strip steel, reduced stress concentration during component welding, established a variable elongation control technology for the finishing machine based on constant performance throughout the winding process, and improved the uniformity of performance at both ends.

[0088] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0089] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for processing and manufacturing cold-rolled semi-annealed strip steel, characterized in that, The method includes the following steps: Obtain cold-rolled semi-annealed strip steel; The acid-rolling shape control of the cold-rolled semi-annealed strip includes: controlling the shape curve of the acid-rolling strip; reducing the edge waviness of the cold-rolled semi-annealed strip; reducing the center waviness of the cold-rolled semi-annealed strip; and controlling the rib waviness of the cold-rolled semi-annealed strip. The formula for the shape curve control in acid-rolling is: Where Y represents the amplitude of the plate shape curve, and x represents the plate width. The value represents a constant. The amplitude of the edge wave is -5 IU, the amplitude of the middle wave is -5 IU, and the amplitude of the rib wave is 5 IU. The edge weight compensation function is enabled in the shape control of the acid continuous rolling mill. The edge weight fitting value = (feedback value - set value) × edge weight value. The compensation function is activated when the actual value of the two edge channels is greater than the set value of 5 IU or the set value is less than the actual value of 10 IU. The temperature control of the annealing furnace for the galvanizing process of the cold-rolled semi-annealed strip steel includes: annealing furnace heating temperature of 700℃, target temperature of soaking zone of 700℃ to ensure that the strip steel is in a semi-annealed state, rapid cooling zone temperature of 580℃, final cooling zone temperature of 250℃, setting the maximum oxygen content in the annealing furnace to be <10ppm, the maximum H2 content to be <5%, and the dew point between -70℃ and -25℃. Controlling the uniformity of the zinc layer at the edge of the zinc pot area for the cold-rolled semi-annealed strip includes: setting an edge baffle in the air knife area, adjusting the distance between the edge of the strip and the edge baffle, obtaining a zinc layer curve, and automatically adjusting the position of the edge baffle relative to the upper and lower surfaces of the strip according to the zinc layer curve; setting the blind zone detection correction of the zinc layer edge of the strip to 25mm, keeping the baffle consistent with the horizontal plane of the strip, and using an arc position locking mode for the baffle position.

2. An apparatus for processing and manufacturing cold-rolled semi-annealed strip steel using the method of claim 1, characterized in that, include: The strip steel acquisition module is used to acquire cold-rolled semi-annealed strip steel. A strip shape control module is used to control the strip shape of the cold-rolled semi-annealed strip during pickling and continuous rolling. The temperature control module is used to control the temperature of the annealing furnace for the galvanizing process of the cold-rolled semi-annealed strip steel. The uniformity control module is used to control the uniformity of the zinc layer at the edge of the zinc pot area of ​​the cold-rolled semi-annealed strip.

3. An electronic device, characterized in that, The electronic device includes: At least one processor; and, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, which, when executed by the at least one processor, enables the at least one processor to perform the cold-rolled semi-annealed strip processing and manufacturing method according to claim 1.

4. A non-transitory computer-readable storage medium storing computer instructions for causing the computer to perform the cold-rolled semi-annealed strip processing and manufacturing method as described in claim 1.

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