Cold rolling method, device, equipment, medium and program product

Abstract

The invention provides a cold rolling method, device and equipment, a medium and a program product, and relates to the technical field of cold rolling. The method comprises the steps that a first target rack is determined based on the total reduction rate of all racks after rolling, and a second target rack is determined based on the total number of all racks; a first cooling strategy in the rolling process of each rack in the first rack set is determined, and a second cooling strategy in the rolling process of each rack in the second rack set is determined; the first rack set is a rack set with a first target rack as a starting point and a second target rack as an ending point according to the rolling sequence, and the second rack set is a rack set with the rolling sequence before the first target rack and after the second target rack; and controlling the temperature of the raw materials in the cold rolling process based on the first cooling strategy and the second cooling strategy. According to the cold rolling method, device and equipment, the medium and the program product, the surface quality of the strip steel can be improved.

Description

Technical Field

[0001] The present application relates to the field of cold rolling technology, and in particular to a cold rolling method, device, equipment, medium and program product. Background Art

[0002] Good surface quality is a key quality indicator for steel strip, and the cold rolling process plays a decisive role in determining this quality. Currently, when rolling high-strength materials at high reduction rates, the surface quality of the steel strip becomes uneven, resulting in color variations and affecting subsequent use. Therefore, to improve the surface uniformity of cold-rolled steel strip, a control method for enhancing cold-rolled surface quality is crucial. Summary of the Invention

[0003] The present application provides a cold rolling method, device, equipment, medium and program product to solve the defect of uneven surface quality of strip steel in the prior art and improve the surface quality of strip steel.

[0004] In a first aspect, the present application provides a cold rolling method, comprising:

[0005] Determining a first target stand based on a total rolling reduction of each stand among all the stands after rolling, and determining a second target stand based on a total number of all the stands; wherein the rolling order of each stand among all the stands is different;

[0006] determining a first cooling strategy for each stand in a first stand set during a rolling process, and determining a second cooling strategy for each stand in a second stand set during a rolling process; the first stand set is a stand set starting from the first target stand and ending at the second target stand in a rolling sequence, and the second stand set is a stand set preceding the first target stand in a rolling sequence and following the second target stand in a rolling sequence;

[0007] Based on the first cooling strategy and the second cooling strategy, the temperature of the raw material during the cold rolling process is controlled to complete the cold rolling process and obtain the target steel strip.

[0008] Optionally, both the first cooling strategy and the second cooling strategy cool the raw material through emulsion; the first distribution density of the emulsion used by the first cooling strategy is greater than the second distribution density of the emulsion used by the second cooling strategy; the first distribution density is the distribution density of the emulsion used by the first cooling strategy in the width direction of the raw material; the second distribution density is the distribution density of the emulsion used by the second cooling strategy in the width direction of the raw material.

[0009] Optionally, an antioxidant is added to the rolling oil of the emulsion at a first preset ratio.

[0010] Optionally, the antioxidant is an amine antioxidant.

[0011] Optionally, a second preset proportion of rust inhibitor is added to the rolling oil of the emulsion.

[0012] Optionally, the rust inhibitor is a long-chain fatty acid.

[0013] In a second aspect, the present application further provides a cold rolling device, comprising:

[0014] a first determination module, configured to determine a first target stand based on a total rolling reduction ratio of each stand among all the stands after rolling, and to determine a second target stand based on a total number of all the stands; wherein the rolling order of each stand among all the stands is different;

[0015] a second determining module, configured to determine a first cooling strategy during the rolling process of each stand in a first stand set, and to determine a second cooling strategy during the rolling process of each stand in a second stand set; the first stand set is a stand set starting from the first target stand and ending at the second target stand in a rolling sequence, and the second stand set is a stand set whose rolling sequence is before the first target stand and whose rolling sequence is after the second target stand;

[0016] The control module is used to control the temperature of the raw material during the cold rolling process based on the first cooling strategy and the second cooling strategy to complete the cold rolling process and obtain the target strip steel.

[0017] In a third aspect, the present application further provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method described in the first aspect when executing the computer program.

[0018] In a fourth aspect, the present application further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which implements the method described in the first aspect when executed by a processor.

[0019] In a fifth aspect, the present application further provides a computer program product, comprising a computer program, which implements the method described in the first aspect when executed by a processor.

[0020] The cold rolling method, device, equipment, medium and program product provided in this application can control the temperature of the raw materials during the cold rolling process to obtain the target strip steel by determining the cooling strategy of different racks, thereby preventing the occurrence of high-temperature oil burn spots, thereby avoiding color differences on the surface of the finished strip steel, ensuring the uniformity of the strip steel surface quality, and improving the strip steel surface quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 1 is a schematic flow chart of the cold rolling method provided in an embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of an example of a cold rolling method provided in an embodiment of the present application;

[0024] Figure 3 Schematic diagram of the structure of the cold rolling device provided in the embodiment of the present application;

[0025] Figure 4 It is a structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0027] Figure 1 Schematic diagram of the cold rolling method provided in the embodiment of the present application. Figure 1 The embodiment of the present application provides a cold rolling method, the execution subject of which may be an electronic device, for example, a controller. The following description will be made using the controller as an example. The method may include:

[0028] Step 110: determining a first target stand based on a total rolling reduction of each stand among all the stands after rolling, and determining a second target stand based on a total number of all the stands; wherein the rolling order of each stand among all the stands is different;

[0029] Step 120: determining a first cooling strategy for each stand in a first stand set during rolling, and determining a second cooling strategy for each stand in a second stand set during rolling; the first stand set is a stand set starting from a first target stand and ending at a second target stand in a rolling sequence, and the second stand set is a stand set whose rolling sequence is before the first target stand and whose rolling sequence is after the second target stand;

[0030] Step 130: Based on the first cooling strategy and the second cooling strategy, the temperature of the raw material during the cold rolling process is controlled to complete the cold rolling process and obtain the target steel strip.

[0031] In step 110, the controller can determine the total reduction ratio after rolling at each stand based on the issued rolling schedule. Specifically, the rolling order of each stand is different, and the total reduction ratio of the raw material will continuously increase after rolling at each stand. When the total reduction ratio of a particular stand reaches a preset value for the first time after rolling, that stand can be designated as the first target stand. The second target stand is determined based on the total number of all stands. For example, if the total number of all stands is n, the second target stand can be the stand with a rolling order of n-1.

[0032] In step 120, the controller may define a rack set whose rolling sequence starts with the first target rack and ends with the second target rack as a first rack set, define a rack set whose rolling sequence precedes the first target rack and whose rolling sequence follows the second target rack as a second rack set, and implement different cooling strategies for the first rack set and the second rack set.

[0033] In step 130, as the raw material passes through each rolling mill, the controller can execute the first cooling strategy or the second cooling strategy corresponding to each rolling mill to control the temperature of the raw material during the cold rolling process, thereby completing the cold rolling process and producing the target steel strip. Specifically, the raw material temperature can be controlled within 150°C, preferably within 120°C.

[0034] The cold rolling method provided in the embodiment of the present application determines the cooling strategy of different racks, controls the temperature of the raw materials during the cold rolling process, and obtains the target strip steel. This can prevent the occurrence of high-temperature oil burn spots, thereby avoiding color differences on the surface of the finished strip steel, ensuring the uniformity of the strip steel surface quality, and improving the strip steel surface quality.

[0035] In one embodiment, both the first cooling strategy and the second cooling strategy cool the raw material through emulsion; the first distribution density of the emulsion used in the first cooling strategy is greater than the second distribution density of the emulsion used in the second cooling strategy; the first distribution density is the distribution density of the emulsion used in the first cooling strategy in the width direction of the raw material; the second distribution density is the distribution density of the emulsion used in the second cooling strategy in the width direction of the raw material.

[0036] Specifically, both the first and second cooling strategies use emulsions to cool the raw material. The first cooling strategy can have an emulsion distribution density greater than 150 L / min / mm along the width of the raw material, while the second cooling strategy can have an emulsion distribution density within the range of 50-100 L / min / mm along the width of the plate.

[0037] The cold rolling method provided in the embodiment of the present application implements a first cooling strategy of a large flow emulsion during the rolling process of each stand in the first stand assembly to ensure the uniformity of cooling of the entire width of the strip; and implements a second cooling strategy of a small flow emulsion during the rolling process of each stand in the second stand assembly to reduce residual oil on the surface of the cold-hardened strip, which is beneficial to reducing the cleaning load of the subsequent process.

[0038] In one embodiment, an antioxidant is added to the rolling oil of the emulsion at a first preset ratio.

[0039] Specifically, the first preset ratio may be 0.3%-1.5%.

[0040] The cold rolling method provided in the embodiment of the present application can improve the oxidation resistance of the strip by adding a first preset proportion of antioxidant to the rolling oil in the emulsion, prevent the rolling oil on the surface of the strip from reacting with the alkali used in the subsequent cleaning process to generate quinone-type coloring substances, thereby ensuring the stability of the surface quality of the strip.

[0041] In one embodiment, the antioxidant is an aminic antioxidant.

[0042] The cold rolling method provided in the embodiment of the present application adds an amine antioxidant to the rolling oil of the emulsion. The amine antioxidant can maintain its chemical properties stable under high temperature conditions, effectively capture and remove free radicals, thereby protecting the strip from oxidation damage, thereby further ensuring the stability of the strip surface quality.

[0043] In one embodiment, a second preset ratio of rust inhibitor is added to the rolling oil in the emulsion.

[0044] Furthermore, in one embodiment, the rust inhibitor is a long-chain fatty acid.

[0045] Specifically, the second preset ratio may be 1%-3%.

[0046] The cold rolling method provided in the embodiment of the present application can improve the rust resistance of the steel strip by adding a rust inhibitor to the rolling oil in the emulsion, thereby ensuring the stability of the surface quality of the steel strip.

[0047] Figure 2 Schematic diagram of the cold rolling method provided in the embodiment of the present application. Figure 2 As shown, based on the description of the above embodiments, the complete implementation process of the cold rolling method provided by this application may include the following steps:

[0048] The raw material thickness is 1.8-3.5 mm, for example, 3 mm, the raw material yield strength is greater than 400 MPa, for example, 650 MPa, the chilled thickness is 0.1-0.5 mm, for example, 0.3 mm, the total reduction ratio is greater than 85%, for example, 90%, and the rolling is performed in n stands (or passes), where n is an integer, for example, 5;

[0049] After rolling through the i-th (i < n) stand, for example, when i = 2 and the total reduction ratio reaches 65%, the strip is cooled to within 150°C, preferably within 120°C, by a large-flow emulsion liquid.

[0050] From the outlet of the i = 2nd stand to the outlet of the n - 1 = 4th stand, the distribution density of the emulsion liquid for cooling along the width of the plate is > 150 L / min / mm, for example, 220 L / min / mm. A large flow rate is adopted to ensure the uniformity of cooling across the entire width of the strip.

[0051] Before the i = 2nd stand and at the inlet of the n = 5th stand, the temperature is 40 - 80°C, for example, 70°C. The distribution density of the emulsion liquid for cooling along the width of the plate is 50 - 100 L / min / mm, for example, 80 L / min / mm. Reducing the flow rate of the emulsion liquid for cooling in the finishing stand reduces the residual oil on the surface of the cold-hardened strip, which is beneficial for reducing the cleaning load in the subsequent processes.

[0052] Furthermore, 0.3% - 1.5%, for example, 1.2% of antioxidant is added to the rolling oil of the emulsion liquid to improve the antioxidant property. Specifically, amine-based high-temperature antioxidants can be added to prevent the reaction between the cold rolling oil on the strip surface and the alkali in the subsequent cleaning process, generating quinone-based coloring substances. 1% - 3%, for example, 2.1% of rust inhibitor is added to the rolling oil of the emulsion liquid to enhance the rust prevention property.

[0053] The cold rolling device provided by the present application will be described below. The cold rolling device described below can be mutually referred to with the cold rolling method described above.

[0054] Figure 3 is a schematic structural diagram of the cold rolling device provided by an embodiment of the present application. Refer to Figure 3 The cold rolling device provided by an embodiment of the present application may include:

[0055] A first determination module 310, configured to determine a first target stand based on the total reduction ratio after rolling of each stand among all stands, and determine a second target stand based on the total number of all stands; the rolling order of each stand among all stands is different;

[0056] A second determination module 320, configured to determine a first cooling strategy during the rolling process of each stand in a first stand set, and determine a second cooling strategy during the rolling process of each stand in a second stand set; the first stand set is a stand set starting from the first target stand and ending at the second target stand in accordance with the rolling order, and the second stand set is a stand set with a rolling order before the first target stand and a rolling order after the second target stand;

[0057] The control module 330 is used to control the temperature of the raw material during the cold rolling process based on the first cooling strategy and the second cooling strategy to complete the cold rolling process and obtain the target strip steel.

[0058] The cold rolling device provided in the embodiment of the present application determines the cooling strategy of different frames, controls the temperature of the raw materials during the cold rolling process, and obtains the target strip steel, which can prevent the occurrence of high-temperature oil burn spots, thereby avoiding color differences on the surface of the finished strip steel, ensuring the uniformity of the strip steel surface quality, and improving the strip steel surface quality.

[0059] Specifically, the above-mentioned cold rolling device provided in the embodiment of the present application can implement all the method steps implemented by the above-mentioned method embodiment in which the execution subject is the controller, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0060] Figure 4 Schematic diagram of the structure of the electronic device provided in the embodiment of the present application. Figure 4 As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430 and a communication bus 440, wherein the processor 410, the communication interface 420, and the memory 430 communicate with each other via the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the cold rolling method, for example, including:

[0061] Determining a first target stand based on a total rolling reduction of each stand among all the stands after rolling, and determining a second target stand based on a total number of all the stands; wherein the rolling order of each stand among all the stands is different;

[0062] determining a first cooling strategy for each stand in a first stand set during a rolling process, and determining a second cooling strategy for each stand in a second stand set during a rolling process; the first stand set is a stand set starting from the first target stand and ending at the second target stand in a rolling sequence, and the second stand set is a stand set preceding the first target stand in a rolling sequence and following the second target stand in a rolling sequence;

[0063] Based on the first cooling strategy and the second cooling strategy, the temperature of the raw material during the cold rolling process is controlled to complete the cold rolling process and obtain the target steel strip.

[0064] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0065] On the other hand, the present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to perform the steps of the cold rolling method provided by the above methods, for example, including:

[0066] Determining a first target stand based on a total rolling reduction of each stand among all the stands after rolling, and determining a second target stand based on a total number of all the stands; wherein the rolling order of each stand among all the stands is different;

[0067] determining a first cooling strategy for each stand in a first stand set during a rolling process, and determining a second cooling strategy for each stand in a second stand set during a rolling process; the first stand set is a stand set starting from the first target stand and ending at the second target stand in a rolling sequence, and the second stand set is a stand set preceding the first target stand in a rolling sequence and following the second target stand in a rolling sequence;

[0068] Based on the first cooling strategy and the second cooling strategy, the temperature of the raw material during the cold rolling process is controlled to complete the cold rolling process and obtain the target steel strip.

[0069] In another aspect, the present application further provides a computer program product, comprising a computer program, which may be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can perform the steps of the cold rolling method provided by the above methods, for example, including:

[0070] Determining a first target stand based on a total rolling reduction of each stand among all the stands after rolling, and determining a second target stand based on a total number of all the stands; wherein the rolling order of each stand among all the stands is different;

[0071] determining a first cooling strategy for each stand in a first stand set during a rolling process, and determining a second cooling strategy for each stand in a second stand set during a rolling process; the first stand set is a stand set starting from the first target stand and ending at the second target stand in a rolling sequence, and the second stand set is a stand set preceding the first target stand in a rolling sequence and following the second target stand in a rolling sequence;

[0072] Based on the first cooling strategy and the second cooling strategy, the temperature of the raw material during the cold rolling process is controlled to complete the cold rolling process and obtain the target steel strip.

[0073] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0074] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0075] It should also be noted that the terms "first," "second," and the like in the embodiments of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein. Furthermore, the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more.

[0076] In the embodiments of this application, the term "and / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0077] In the embodiments of the present application, "determine B based on A" means that the factor A must be considered when determining B. It is not limited to "B can be determined based on A alone", and should also include: "determine B based on A and C", "determine B based on A, C and E", "determine C based on A, and further determine B based on C", etc. It can also include taking A as a condition for determining B, for example, "when A meets the first condition, use the first method to determine B"; for example, "when A meets the second condition, determine B", etc.; for example, "when A meets the third condition, determine B based on the first parameter", etc. Of course, it can also be a condition that takes A as a factor in determining B, for example, "when A meets the first condition, use the first method to determine C, and further determine B based on C", etc.

[0078] In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A cold rolling method, characterized in that: include: Determining a first target stand based on a total rolling reduction ratio of each stand in all stands after rolling, and determining a second target stand based on a total number of all stands; The rolling sequence of each stand in all the stands is different; Determining a first cooling strategy during the rolling process of each stand in the first stand set, and determining a second cooling strategy during the rolling process of each stand in the second stand set; The first stand set is a stand set starting from the first target stand and ending at the second target stand in a rolling sequence, and the second stand set is a stand set preceding the first target stand in a rolling sequence and following the second target stand in a rolling sequence; Based on the first cooling strategy and the second cooling strategy, the temperature of the raw material during the cold rolling process is controlled to complete the cold rolling process and obtain the target steel strip.

2. The cold rolling method according to claim 1, characterized in that Both the first cooling strategy and the second cooling strategy cool the raw material through emulsion; the first distribution density of the emulsion used in the first cooling strategy is greater than the second distribution density of the emulsion used in the second cooling strategy; the first distribution density is the distribution density of the emulsion used in the first cooling strategy in the width direction of the raw material; the second distribution density is the distribution density of the emulsion used in the second cooling strategy in the width direction of the raw material.

3. The cold rolling method according to claim 2, characterized in that The rolling oil of the emulsion is added with an antioxidant in a first preset ratio.

4. The cold rolling method according to claim 3, characterized in that The antioxidant is an amine antioxidant.

5. The cold rolling method according to claim 2, characterized in that A second preset ratio of rust inhibitor is added to the rolling oil of the emulsion.

6. The cold rolling method according to claim 5, characterized in that The rust inhibitor is a long-chain fatty acid.

7. A cold rolling device, characterized in that: include: A first determination module is configured to determine a first target stand based on a total rolling reduction ratio of each stand in all stands after rolling, and to determine a second target stand based on a total number of all stands; The rolling sequence of each stand in all the stands is different; A second determining module is used to determine a first cooling strategy during the rolling process of each stand in the first stand set, and to determine a second cooling strategy during the rolling process of each stand in the second stand set; The first stand set is a stand set starting from the first target stand and ending at the second target stand in a rolling sequence, and the second stand set is a stand set preceding the first target stand in a rolling sequence and following the second target stand in a rolling sequence; The control module is used to control the temperature of the raw material during the cold rolling process based on the first cooling strategy and the second cooling strategy to complete the cold rolling process and obtain the target strip steel.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the cold rolling method according to any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the cold rolling method according to any one of claims 1 to 6 is implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the cold rolling method according to any one of claims 1 to 6 is implemented.

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