Rolling method and apparatus for high-quality special steel, and electronic device and storage medium

Abstract

The present invention relates to the technical field of rolling. Provided are a rolling method and apparatus for high-quality special steel, and an electronic device and a storage medium. The method comprises: on the basis of rolling parameter information and rolling mill speed correction coefficients, obtaining the rolling speed of each rolling mill, wherein the rolling mill speed correction coefficients comprise a speed correction coefficient for each roughing mill and a speed correction coefficient for each finishing mill; obtaining a rolling force by means of the rolling parameter information, wherein the rolling force is used for representing the pressure applied by each rolling mill to steel; on the basis of the rolling force, obtaining a rolling torque and a rolling power, wherein the rolling torque is used for representing the torque required for each rolling mill to complete a rolling process; and on the basis of the rolling speed, the rolling force, the rolling torque and the rolling power, controlling each rolling mill, so as to obtain a rolled high-quality special steel product. By means of controlling parameters that affect the product quality during a rolling process, the present invention achieves an improvement in the quality of ultimately obtained high-quality special steel.

Description

A method, apparatus, electronic equipment and storage medium for rolling high-quality special steel. Technical Field

[0001] This invention relates to the field of rolling technology, and more specifically, to a method, apparatus, electronic device, and storage medium for rolling high-quality special steel. Background Technology

[0002] Specialty steel refers to a type of special steel with excellent properties, typically used in applications requiring high strength, wear resistance, or corrosion resistance. Specialty steel generally includes high-alloy steel, high-strength steel, and special steel, whose properties are enhanced by adding different alloying elements and undergoing specific heat treatment processes. The rolling process refers to the process of shaping steel billets into steel products of the desired shape and size. Currently, the inconsistent quality of specialty steel products stems from unstable parameter control during the rolling process. Summary of the Invention

[0003] The present invention aims to solve at least one of the above-mentioned problems.

[0004] To address the aforementioned problems, this invention provides a method, apparatus, electronic device, and storage medium for rolling high-quality special steel.

[0005] In a first aspect, the present invention provides a method for rolling special steel, comprising: obtaining the rolling speed of each rolling mill according to rolling parameter information and rolling mill speed correction coefficient, wherein the rolling mill speed correction coefficient includes the speed correction coefficient of each roughing mill and the speed correction coefficient of each finishing mill;

[0006] The rolling force is obtained from the rolling parameter information, wherein the rolling force is used to represent the pressure applied to the steel by each rolling mill;

[0007] The rolling torque and rolling power are obtained from the rolling force, wherein the rolling torque is used to represent the torque required for each rolling mill to complete the rolling process;

[0008] The special steel rolled products are obtained by controlling each rolling mill according to the rolling speed, rolling force, rolling torque and rolling power.

[0009] Optionally, obtaining the rolling force through the rolling parameter information includes:

[0010] The stress state influence coefficient and rolling temperature are obtained based on the rolling parameter information;

[0011] The deformation resistance is obtained by considering the deformation rate, the degree of deformation, and the rolling temperature.

[0012] The rolling force is obtained by using the rolling parameter information, the stress state influence coefficient, and the deformation resistance, wherein the rolling force is:

[0013] P = Bl c Q p K,

[0014] Where Pl is the rolling force, B is the bandwidth, and l c Q is the contact arc length. p K is the stress state influence coefficient, and K is the deformation resistance.

[0015] Optionally, obtaining the state influence coefficient based on the rolling parameter information includes:

[0016] When the contact arc length is greater than or equal to the average thickness of the workpiece inlet and outlet, the stress state influence coefficient is obtained according to the first state influence coefficient model, wherein the first state influence coefficient model is:

[0017] Among them, Q p K is the stress state influence coefficient, ε is the reduction rate, R is the radius of the mill work roll, and h out h represents the thickness of the strip at the export point. r The thickness of the neutral surface;

[0018] When the contact arc length is less than the average thickness of the workpiece at the inlet and outlet, the stress state influence coefficient is obtained according to the second state influence coefficient model, wherein the second state influence coefficient model is:

[0019] Among them, l c h is the contact arc length. in This refers to the thickness of the strip at the entrance.

[0020] Optionally, obtaining the deformation resistance through deformation speed, deformation degree, and rolling temperature includes:

[0021] The deformation resistance is obtained by the deformation rate, the degree of deformation, and the rolling temperature, wherein the deformation resistance is:

[0022] Where σ is the deformation resistance and T is the rolling temperature. Let e ​​be the strain rate and e be the strain.

[0023] Optionally, obtaining the rolling speed of each rolling mill based on rolling parameter information and mill speed correction coefficient includes:

[0024] The original rolling speed of each rolling mill is obtained based on the rolling parameter information;

[0025] The rolling speed of each rolling mill is obtained by correcting the original rolling speed using the rolling mill speed correction coefficient, wherein the rolling speed is:

[0026] v casting / 60.h casting =v Ri .h Ri / α Ri =v Fi .h Fi / α Fi ,

[0027] Among them, v casting h is the billet drawing speed of the continuous casting machine. casting v represents the thickness of the continuously cast billet. Ri h is the rolling speed of the i-th roughing mill. Ri Let v be the exit thickness of the i-th roughing mill. Fi h is the rolling speed of the i-th finishing mill. Fi Let α be the exit thickness of the i-th finishing mill. Ri α is the speed correction factor for the i-th roughing mill. Fi is the speed correction coefficient for the i-th finishing mill.

[0028] Optionally, obtaining the rolling torque and rolling power based on the rolling force includes:

[0029] The rolling torque is obtained from the rolling force, wherein the rolling torque is:

[0030] Where M is the rolling torque and P is the rolling force. l is the lever arm coefficient. c The contact arc length;

[0031] The rolling power is obtained based on the rolling force and the rolling torque, wherein the rolling power is:

[0032] N = Mn / 971,

[0033] Wherein, N is the rolling power, M is the rolling torque, and n is the rotational speed of the neutral roll.

[0034] Optionally, the rolling time is obtained through the rolling parameter information and the rolling speed, wherein the rolling time is:

[0035] t j =H×L / h out / v,

[0036] Among them, t j The rolling time is given, where H is the thickness of the continuously cast billet, L is the length of the continuously cast billet, and h is the rolling time.out Where ν is the strip exit thickness and ν is the rolling speed;

[0037] The gap time is obtained by using the rolling parameter information and the rolling speed, wherein the gap time is:

[0038] t jx =L m / v,

[0039] Among them, t jx L is the interval time. m ν is the stand spacing, and ν is the rolling speed.

[0040] Secondly, the present invention provides a special steel rolling apparatus, comprising: a rolling speed acquisition module, used to obtain the rolling speed of each rolling mill according to rolling parameter information and rolling mill speed correction coefficient, wherein the rolling mill speed correction coefficient includes the speed correction coefficient of each roughing mill and the speed correction coefficient of each finishing mill;

[0041] The rolling force acquisition module obtains the rolling force through the rolling parameter information, wherein the rolling force is used to represent the pressure applied to the steel by each rolling mill;

[0042] A rolling torque and rolling power acquisition module is used to obtain rolling torque and rolling power based on the rolling force, wherein the rolling torque is used to represent the torque required for each rolling mill to complete the rolling process;

[0043] The special steel rolled product acquisition module is used to control each rolling mill to obtain special steel rolled products based on the rolling speed, the rolling force, the rolling torque and the rolling power.

[0044] Thirdly, the present invention provides an electronic device, including a memory and a processor;

[0045] The memory is used to store computer programs;

[0046] The processor is configured to implement the special steel rolling method as described in the first aspect when executing the computer program.

[0047] Fourthly, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the special steel rolling method as described in the first aspect.

[0048] The beneficial effects of the special steel rolling method, apparatus, electronic equipment, and storage medium of the present invention are:

[0049] Because the calculated rolling speed and the actual rolling speed may deviate to some extent due to factors such as friction, the rolling speed of each mill is obtained based on rolling parameter information and mill speed correction coefficients. This results in a rolling speed that more closely matches the actual rolling speed, allowing adjustments to the rolling process based on the actual rolling speed. The mill speed correction coefficients include those for each roughing mill and each finishing mill, taking into account the different influence coefficients of different mills. The rolling time and interval time can be obtained from the rolling parameter information and the rolling speed. The rolling force can also be obtained from the rolling parameter information, making the rolling force more accurate. The rolling torque and rolling power are obtained from the rolling force. By controlling each mill based on the rolling speed, rolling force, rolling torque, and rolling power, the high-quality special steel product is produced. By controlling the parameters affecting product quality during the rolling process, the quality of the final high-quality special steel is improved. Attached Figure Description

[0050] Figure 1 is a schematic flowchart of a special steel rolling method according to an embodiment of the present invention;

[0051] Figure 2 is a schematic diagram of the structure of a special steel rolling device according to an embodiment of the present invention;

[0052] Figure 3 is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0053] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0054] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.

[0055] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0056] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0057] The names of the messages or information exchanged between the multiple devices in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0058] To address the problems existing in the aforementioned related technologies, this embodiment provides a method, apparatus, electronic device, and storage medium for rolling special steel.

[0059] As shown in Figure 1, an embodiment of the present invention provides a method for rolling special steel, comprising:

[0060] Step 110: Obtain the rolling speed of each rolling mill based on the rolling parameter information and the mill speed correction coefficient, wherein the mill speed correction coefficient includes the speed correction coefficient of each roughing mill and the speed correction coefficient of each finishing mill.

[0061] Specifically, the rolling parameter information includes steel plate parameter information and rolling mill equipment parameter information. The steel plate parameter information includes the input width of the continuously cast billet, the continuously cast billet thickness, the finishing mill exit thickness, the elastic modulus, the density of the rolled piece, the specific heat of the rolled piece, the Boltzmann constant, the emissivity, and the thickness of the neutral plane. The rolling mill equipment parameter information includes the input diameter of the work rolls, the lever arm coefficient, the billet drawing speed, the roughing mill stand spacing, the roughing mill to finishing mill spacing, the finishing mill stand spacing, the contact arc length, and the neutral angle roll speed. Based on the steel plate input parameter information and the rolling mill equipment parameter information, the exit thickness of the rolled piece for each stand is allocated.

[0062] Step 120: Obtain the rolling force through the rolling parameter information, wherein the rolling force is used to represent the pressure applied to the steel by each rolling mill.

[0063] Specifically, the stress state influence coefficient is obtained by considering the influence of friction, and the temperature at each stage of rolling is obtained, thereby calculating the deformation resistance, and then the rolling force is obtained through the rolling parameter information.

[0064] Step 130: Obtain rolling torque and rolling power based on the rolling force, wherein the rolling torque is used to represent the torque required for each rolling mill to complete the rolling process.

[0065] Specifically, rolling force determines rolling torque. When the workpiece is not subjected to other external forces, the resultant force of the normal force and frictional force acting on the two rolls must be equal in magnitude and opposite in direction, and act along a straight line. Rolling power is related to rolling torque and the rotational speed of the neutral roll.

[0066] Step 140: Control each rolling mill according to the rolling speed, the rolling force, the rolling torque and the rolling power to obtain special steel rolled products.

[0067] Specifically, by monitoring the rolling process through rolling speed, adjustments can be made to maximize the speed without affecting subsequent processes. Calculating the rolling speed allows for the determination of a reasonable rolling speed range to ensure the stability and efficiency of the rolling process. Combined with relevant parameters, the rolling force is accurately calculated. The torque required during rolling is calculated to ensure the mill's drive system meets the requirements. The power required for rolling is calculated to optimize the mill's power system. By comprehensively considering multiple parameters such as rolling speed, rolling force, rolling torque, and rolling power, a rolling schedule is established, and the resulting special steel rolled products are obtained through this schedule.

[0068] In this embodiment, since there will be a certain deviation between the calculated rolling speed and the actual rolling speed due to factors such as friction, the rolling speed of each rolling mill is obtained based on the rolling parameter information and the mill speed correction coefficient. The obtained rolling speed is closer to the actual rolling speed, and the rolling process can be adjusted according to the actual rolling speed. The mill speed correction coefficient includes the speed correction coefficients of each roughing mill and each finishing mill, taking into account the different influence coefficients of different rolling mills. The rolling time and gap time can be obtained through the rolling parameter information and the rolling speed, and the rolling force can be obtained through the rolling parameter information, making the rolling force more accurate. The rolling torque and rolling power are obtained from the rolling force. The rolling speed, the rolling force, the rolling torque, and the rolling power are used to control each rolling mill to obtain the special steel rolled product. By controlling the parameters affecting the product quality during the rolling process, the quality of the final special steel is improved.

[0069] Optionally, obtaining the rolling force through the rolling parameter information includes:

[0070] The stress state influence coefficient and rolling temperature are obtained based on the rolling parameter information;

[0071] The deformation resistance is obtained by considering the deformation rate, the degree of deformation, and the rolling temperature.

[0072] The rolling force is obtained by using the rolling parameter information, the stress state influence coefficient, and the deformation resistance, wherein the rolling force is:

[0073] P = Bl c Q p K,

[0074] Where Pl is the rolling force, B is the bandwidth, and l c Q is the contact arc length. p K is the stress state influence coefficient, and K is the deformation resistance.

[0075] Specifically, the magnitude of the resistance to plastic deformation of a metal depends not only on the chemical composition of the metal material, but also on the physical conditions of plastic deformation, such as deformation temperature, deformation rate, and degree of deformation. During short-process rolling, the temperature of the rolled piece is affected by air-cooled radiation, high-pressure water descaling, low-pressure water spraying, and roll conduction. The rolling temperature includes radiation temperature drop, high-pressure water descaling temperature drop, low-pressure water spraying cooling temperature drop, and temperature drop caused by contact conduction.

[0076] Radiation temperature drop: The radiation temperature drop of strip steel mainly occurs during the transport of billets, strips, and other components. When high-temperature rolled products remain in the air, they continuously dissipate heat through radiation, causing a temperature drop. Convection heat transfer also occurs, but the temperature drop caused by convection is only about 5% of that caused by radiation. The radiation heat transfer T... fs for:

[0077] Where T0 is the temperature before cooling (°C), ε is the emissivity of the actual object, also known as emissivity (ε<1), which is 0.8 when there is a lot of iron oxide scale on the surface, and 0.55 to 0.65 for a freshly rolled smooth surface, and σ is the emissivity of a blackbody, also known as the Stefan-Boltzmann constant, σ=5.69W / (m 2 ·K 4 C is the specific heat capacity, J / (kg·℃), and G is the density of the steel plate, kg / m³. 3 ΔL is the cooling distance in meters, and ν is the strip speed in meters per second.

[0078] High-pressure water descaling temperature drop: Using high-pressure water to impact the surface of a steel billet (strip) to remove primary (or secondary) iron oxide scale is currently the main method. Because a large amount of high-pressure water comes into contact with the billet surface, the rolled piece experiences a temperature drop; this heat loss is a form of forced convection. The forced convection heat exchange process is complex, depending not only on the billet temperature, the medium temperature, and the thermophysical properties of the steel, but also on the fluid flow state. The aforementioned high-pressure water descaling temperature drop T... cl for:

[0079] In the above formula, the influence of various factors is attributed to α. H In, α H The forced convection heat transfer coefficient is W / (m²). 2 ·℃), T w For descaling water temperature, ℃, l H , where is the length of the high-pressure water section, in meters (m).

[0080] Low-pressure water jet cooling temperature drop: Since water jet cooling is also a form of forced convection, the calculation formula is similar, but the α value is different. The low-pressure water jet cooling temperature drop T is... jj for:

[0081] Among them, l F Let α be the distance between racks, in meters (m). L The forced convection heat exchange coefficient between racks; W / (m 2 ·℃).

[0082] Temperature drop caused by contact conduction: There are two contradictory thermal processes during rolling. One is the heat generated by the plastic deformation of the workpiece during rolling, which causes a temperature rise. Secondly, the heat lost when the high-temperature workpiece comes into contact with the low-temperature rolls during rolling causes the workpiece temperature to drop. It can be derived from the heat balance:

[0083] Where η is the absorption efficiency, which is the percentage of deformation heat converted into heat generated by the rolled piece, β is the heat transfer efficiency between the rolled piece and the roll, which is generally 0.48 to 0.55, and J1 is the thermal-mechanical equivalent, J1 = 9.81.

[0084] Among them, the temperature drop caused by contact conduction for

[0085] Where, λ r The contact heat transfer coefficient of the rolled parts in each stand is given.

[0086] h m =(h in +hout )2,

[0087] When the steel grade is stainless steel, λ r =60,h m Let be the average thickness of the strip steel per frame, in meters (m).

[0088] Wherein, K is determined by the chemical composition of the metal material and the physical conditions of deformation, namely the deformation temperature, deformation speed, and degree of deformation resistance of the metal, K = βσ, MPa. When the finished product thickness is less than 4.5 mm or the rolled steel is not stainless steel, K = (1 + 0.02i)σ, where i is the frame number; otherwise, K = 1.15σ.

[0089] Optionally, obtaining the stress state influence coefficient based on the rolling parameter information includes:

[0090] When the contact arc length is greater than or equal to the average thickness of the workpiece inlet and outlet, the stress state influence coefficient is obtained according to the first state influence coefficient model, wherein the first state influence coefficient model is:

[0091] Among them, Q p K is the stress state influence coefficient, ε is the reduction rate, R is the radius of the mill work roll, and h out h represents the thickness of the strip at the export point. r The thickness of the neutral surface;

[0092] When the contact arc length is less than the average thickness of the workpiece at the inlet and outlet, the stress state influence coefficient is obtained according to the second state influence coefficient model, wherein the second state influence coefficient model is:

[0093] Among them, l c h is the contact arc length. in This refers to the thickness of the strip at the entrance.

[0094] In this optional embodiment, the influence coefficient model of the stress state caused by friction on the contact arc is as follows. Different ratios of contact arc length and average thickness are discussed separately to make the subsequent calculation of rolling force more accurate.

[0095] Optionally, obtaining the deformation resistance through deformation speed, deformation degree, and rolling temperature includes:

[0096] The deformation resistance is obtained by the deformation rate, the degree of deformation, and the rolling temperature, wherein the deformation resistance is:

[0097] Where σ is the deformation resistance and T is the rolling temperature. Let e ​​be the strain rate and e be the strain.

[0098] Specifically, the resistance to plastic deformation of metals refers to the force per unit area required for a metal material to undergo plastic deformation under uniaxial stress. Its magnitude depends not only on the chemical composition of the metal material, but also on the physical conditions of plastic deformation, such as deformation temperature, deformation rate, and degree of deformation.

[0099] Optionally, obtaining the rolling speed of each rolling mill based on rolling parameter information and mill speed correction coefficient includes:

[0100] The original rolling speed of each rolling mill is obtained based on the rolling parameter information;

[0101] The rolling speed of each rolling mill is obtained by correcting the original rolling speed using the rolling mill speed correction coefficient, wherein the rolling speed is:

[0102] v casting / 60.h casting =v Ri .h Ri / α Ri =v Fi .h Fi / α Fi ,

[0103] Among them, v casting h is the billet drawing speed of the continuous casting machine. casting v represents the thickness of the continuously cast billet. Ri h is the rolling speed of the i-th roughing mill. Ri Let v be the exit thickness of the i-th roughing mill. Fi h is the rolling speed of the i-th finishing mill. Fi Let α be the exit thickness of the i-th finishing mill. Ri α is the speed correction factor for the i-th roughing mill. Fi is the speed correction coefficient for the i-th finishing mill.

[0104] In some specific embodiments, two roughing mills, R1 and R2, and six finishing mills, F1, F2, F3, F4, F5, and F6, are set up. The speed correction coefficient for the R1 stand is α. R1 =1.145, speed correction factor α for F1 frame F1 =2.007, and the remaining racks were fitted in the same way, resulting in coefficients α. R2 =1.129, α F2 =2.001, α F3 =2.012, α F4 =2.050, α F5 =2.068, α F6 =2.124.

[0105] In this optional embodiment, the speed is corrected according to the speed correction coefficient of each roughing mill and the speed correction coefficient of each finishing mill, so that the obtained rolling speed is closer to the actual rolling speed.

[0106] Optionally, obtaining the rolling torque and rolling power based on the rolling force includes:

[0107] The rolling torque is obtained from the rolling force, wherein the rolling torque is:

[0108] Where M is the rolling torque and P is the rolling force. l is the lever arm coefficient. c The contact arc length;

[0109] The rolling power is obtained based on the rolling force and the rolling torque, wherein the rolling power is:

[0110] N = Mn / 971,

[0111] Wherein, N is the rolling power, M is the rolling torque, and n is the rotational speed of the neutral roll.

[0112] Specifically, The lever arm coefficient is 0.4 to 0.48 for roughing mills and 0.39 to 0.44 for finishing mills.

[0113] Optionally, it also includes:

[0114] The rolling time is obtained using the rolling parameter information and the rolling speed, wherein the rolling time is:

[0115] t j =H×L / h out / v,

[0116] Among them, t j The rolling time is given, where H is the thickness of the continuously cast billet, L is the length of the continuously cast billet, and h is the rolling time. out Where ν is the strip exit thickness and ν is the rolling speed;

[0117] The gap time is obtained by using the rolling parameter information and the rolling speed, wherein the gap time is:

[0118] t jx =L m / v,

[0119] Among them, t jx L is the interval time. m ν is the stand spacing, and ν is the rolling speed.

[0120] Specifically, the rolling time is used to represent the time it takes for each rolling mill to complete the rolling process, and the gap time is used to represent the time interval between adjacent rolling mills.

[0121] In some more specific embodiments, 65Mn spring steel is selected as the material, the continuous casting billet thickness is 93mm, the width is 1200mm, the finishing roll exit thickness is 3.0mm, the elastic modulus is 210GPa, the Poisson's ratio is 0.3, the density is 7800kg / m3, the specific heat capacity is 691KJ / (kg·℃), and the Boltzmann constant is 5.69W / (m3). 2 ·K 4 The blackness is 0.8, and the furnace temperature is 1180℃.

[0122] The roughing mill has a work roll diameter of 850mm, F1 to F3 work roll diameters of 800mm, F4 to F6 work roll diameters of 600mm, a billet drawing speed of 5.0m / min, a roughing mill stand spacing of 4.5m, a roughing mill to finishing mill spacing of 49.375m, and a finishing mill stand spacing of 4.4m.

[0123] Based on the above parameters, the exit thickness of each stand is allocated, and the rolling speed is determined based on the exit thickness, slab drawing speed and speed correction coefficient of each stand. The calculation results are shown in Table 1.

[0124] Table 1 Rolling Thickness and Rolling Speed

[0125] Based on the above rolling speed and the thickness of each stand, the rolling time and interval time were calculated, and the calculation results for each stand are shown in Table 2.

[0126] The bite angle, neutral angle, neutral surface thickness, contact arc length, and external friction stress state influence coefficient are calculated based on the inlet and outlet thicknesses of each stand and the diameter of the work rolls. These are used to calculate the rolling force. The friction stress state influence coefficient is shown in Table 2.

[0127] Table 2 Rolling Time and Interval Schedule

[0128] Based on the steel plate input parameters and the layout parameters of the headless rolling mill, calculate the air cooling temperature drop, descaling temperature drop, inter-stand temperature drop, plastic deformation temperature rise, and temperature drop caused by contact conduction, and calculate the temperature at each stage of rolling.

[0129] Based on deformation temperature, deformation rate, and degree of deformation, calculate the material's deformation resistance. Based on contact arc length, bandwidth, and deformation resistance, calculate the rolling force, rolling torque, and rolling power of each stand in the roughing and finishing mills.

[0130] As shown in Figure 2, an embodiment of the present invention provides a special steel rolling apparatus, comprising:

[0131] The rolling speed acquisition module 10 is used to obtain the rolling speed of each rolling mill based on the rolling parameter information and the rolling mill speed correction coefficient, wherein the rolling mill speed correction coefficient includes the speed correction coefficient of each roughing mill and the speed correction coefficient of each finishing mill.

[0132] The rolling force acquisition module 20 is used to obtain the rolling force through the rolling parameter information, wherein the rolling force is used to represent the pressure applied to the steel by each rolling mill;

[0133] The rolling torque and rolling power acquisition module 30 is used to obtain the rolling torque and rolling power based on the rolling force, wherein the rolling torque is used to represent the torque of each rolling mill in completing the rolling process;

[0134] The special steel rolled product acquisition module 40 is used to control each rolling mill to obtain special steel rolled products based on the rolling speed, the rolling force, the rolling torque and the rolling power.

[0135] The special steel rolling apparatus of this embodiment is used to realize the special steel rolling method described above. Its advantages over the prior art are the same as the advantages of the special steel rolling method described above over the prior art, and will not be repeated here.

[0136] Optionally, the rolling force acquisition module 20 is specifically used to: obtain the stress state influence coefficient and rolling temperature based on the rolling parameter information;

[0137] The deformation resistance is obtained by considering the deformation rate, the degree of deformation, and the rolling temperature.

[0138] The rolling force is obtained by using the rolling parameter information, the stress state influence coefficient, and the deformation resistance, wherein the rolling force is:

[0139] P = Bl c Q p K,

[0140] Where Pl is the rolling force, B is the bandwidth, and l c This is the contact arc length.

[0141] Optionally, the rolling force acquisition module 20 is specifically used to: when the contact arc length is greater than or equal to the average thickness of the workpiece inlet and outlet, obtain the stress state influence coefficient according to the first state influence coefficient model, wherein the first state influence coefficient model is:

[0142] Among them, Q p K is the stress state influence coefficient, ε is the reduction rate, R is the radius of the mill work roll, and h out h represents the thickness of the strip at the export point.r The thickness of the neutral surface;

[0143] When the contact arc length is less than the average thickness of the workpiece at the inlet and outlet, the stress state influence coefficient is obtained according to the second state influence coefficient model, wherein the second state influence coefficient model is:

[0144] Among them, l c h is the contact arc length. in This refers to the thickness of the strip at the entrance.

[0145] Optionally, the rolling force acquisition module 20 is specifically used to: obtain the deformation resistance through the deformation speed, the degree of deformation, and the rolling temperature, wherein the deformation resistance is:

[0146] Where σ is the deformation resistance, and T is the rolling temperature. Let e ​​be the strain rate and e be the strain.

[0147] Optionally, the rolling speed acquisition module 10 is specifically used to: obtain the original rolling speed of each rolling mill based on the rolling parameter information;

[0148] The rolling speed of each rolling mill is obtained by correcting the original rolling speed using the rolling mill speed correction coefficient, wherein the rolling speed is:

[0149] v casting / 60.h casting =v Ri .h Ri / α Ri =v Fi .h Fi / α Fi ,

[0150] Among them, v casting h is the billet drawing speed of the continuous casting machine. casting v represents the thickness of the continuously cast billet. Ri h is the rolling speed of the i-th roughing mill. Ri Let v be the exit thickness of the i-th roughing mill. Fi h is the rolling speed of the i-th finishing mill. Fi Let α be the exit thickness of the i-th finishing mill. Ri α is the speed correction factor for the i-th roughing mill. Fi is the speed correction coefficient for the i-th finishing mill.

[0151] Optionally, the rolling torque and rolling power acquisition module 30 is specifically used to: obtain the rolling torque based on the rolling force, wherein the rolling torque is:

[0152] Where M is the rolling torque and P is the rolling force. l is the lever arm coefficient. c The contact arc length;

[0153] The rolling power is obtained based on the rolling force and the rolling torque, wherein the rolling power is:

[0154] N = Mn / 971,

[0155] Wherein, N is the rolling power, M is the rolling torque, and n is the rotational speed of the neutral roll.

[0156] Optionally, the special steel rolling apparatus further includes a rolling time and time interval acquisition module, which is used to: obtain the rolling time through the rolling parameter information and the rolling speed, wherein the rolling time is:

[0157] t j =H×L / h out / v,

[0158] Among them, t j The rolling time is given, where H is the thickness of the continuously cast billet, L is the length of the continuously cast billet, and h is the rolling time. out Where ν is the strip exit thickness and ν is the rolling speed;

[0159] The gap time is obtained by using the rolling parameter information and the rolling speed, wherein the gap time is:

[0160] t jx =L m / v,

[0161] Among them, t jx L is the interval time. m ν is the stand spacing, and ν is the rolling speed.

[0162] As shown in Figure 3, an electronic device 300 provided in this embodiment of the invention includes a memory 310 and a processor 320; the memory 310 is used to store a computer program; the processor 320 is used to implement the special steel rolling method described above when the computer program is executed.

[0163] Alternatively, an electronic device 300 includes a memory 310 and a processor 320 coupled to the memory 310; the memory 310 is configured to store a computer program; and the processor 320 is configured to perform the following operations when the computer program is executed:

[0164] The rolling speed of each rolling mill is obtained based on the rolling parameter information and the mill speed correction coefficient, wherein the mill speed correction coefficient includes the speed correction coefficient of each roughing mill and the speed correction coefficient of each finishing mill.

[0165] The rolling force is obtained through the rolling parameter information, wherein the rolling force is used to represent the pressure applied to the steel by each rolling mill;

[0166] The rolling torque and rolling power are obtained from the rolling force, wherein the rolling torque is used to represent the torque required for each rolling mill to complete the rolling process;

[0167] The special steel rolled products are obtained by controlling each rolling mill according to the rolling speed, rolling force, rolling torque and rolling power.

[0168] This invention provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the special steel rolling method described above.

[0169] Alternatively, a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the following operations:

[0170] The rolling speed of each rolling mill is obtained based on the rolling parameter information and the mill speed correction coefficient, wherein the mill speed correction coefficient includes the speed correction coefficient of each roughing mill and the speed correction coefficient of each finishing mill.

[0171] The rolling force is obtained through the rolling parameter information, wherein the rolling force is used to represent the pressure applied to the steel by each rolling mill;

[0172] The rolling torque and rolling power are obtained from the rolling force, wherein the rolling torque is used to represent the torque required for each rolling mill to complete the rolling process;

[0173] The special steel rolled products are obtained by controlling each rolling mill according to the rolling speed, rolling force, rolling torque and rolling power.

[0174] The present invention will now be described an electronic device 300 that can serve as a server or client of the present invention, which is an example of a hardware device that can be applied to various aspects of the present invention. Electronic device 300 is intended to represent various forms of digital electronic computer devices, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic device 300 can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0175] Electronic device 300 includes a computing unit that can perform various appropriate actions and processes based on a computer program stored in read-only memory (ROM) or a computer program loaded from a storage unit into random access memory (RAM). The RAM may also store various programs and data required for device operation. The computing unit, ROM, and RAM are interconnected via a bus. Input / output (I / O) interfaces are also connected to the bus.

[0176] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc. In this application, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of the present invention according to actual needs. Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units can be implemented in hardware or as software functional units.

[0177] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A method for rolling high-quality special steel, characterized in that, include: The rolling speed of each rolling mill is obtained based on the rolling parameter information and the mill speed correction coefficient, wherein the mill speed correction coefficient includes the speed correction coefficient of each roughing mill and the speed correction coefficient of each finishing mill. The rolling force is obtained from the rolling parameter information, wherein the rolling force is used to represent the pressure applied to the steel by each rolling mill; The rolling torque and rolling power are obtained from the rolling force, wherein the rolling torque is used to represent the torque required for each rolling mill to complete the rolling process; The special steel rolled products are obtained by controlling each rolling mill according to the rolling speed, rolling force, rolling torque and rolling power.

2. The method for rolling special steel according to claim 1, characterized in that, The process of obtaining the rolling force through the rolling parameter information includes: The stress state influence coefficient and rolling temperature are obtained based on the rolling parameter information; The deformation resistance is obtained by considering the deformation rate, the degree of deformation, and the rolling temperature. The rolling force is obtained by using the rolling parameter information, the stress state influence coefficient, and the deformation resistance, wherein the rolling force is: P=Bl c Q p K, Where Pl is the rolling force, B is the bandwidth, and l c Q is the contact arc length. p is the stress state influence coefficient, and K is the deformation resistance.

3. The method for rolling special steel according to claim 2, characterized in that, The step of obtaining the stress state influence coefficient based on the rolling parameter information includes: When the contact arc length is greater than or equal to the average thickness of the workpiece inlet and outlet, the stress state influence coefficient is obtained according to the first state influence coefficient model, wherein the first state influence coefficient model is: Among them, Q p The stress state influence coefficient is given by ε, where ε is the reduction rate, R is the radius of the mill work roll, and h is the radius of the work roll. out h represents the thickness of the strip at the export point. r The thickness of the neutral surface; When the contact arc length is less than the average thickness of the workpiece at the inlet and outlet, the stress state influence coefficient is obtained according to the second state influence coefficient model, wherein the second state influence coefficient model is: Among them, l c h is the contact arc length. in This refers to the thickness of the strip at the entrance.

4. The method for rolling special steel according to claim 2, characterized in that, The deformation resistance obtained by means of deformation speed, deformation degree and rolling temperature includes: The deformation resistance is obtained by the deformation rate, the degree of deformation, and the rolling temperature, wherein the deformation resistance is: Where σ is the deformation resistance and T is the rolling temperature. Let e ​​be the strain rate and e be the strain.

5. The method for rolling special steel according to claim 1, characterized in that, The process of obtaining the rolling speed of each rolling mill based on rolling parameter information and mill speed correction coefficient includes: The original rolling speed of each rolling mill is obtained based on the rolling parameter information; The rolling speed of each rolling mill is obtained by correcting the original rolling speed using the rolling mill speed correction coefficient, wherein the rolling speed is: v casting / 60.h casting =v Ri .h Ri / α Ri =v Fi .h Fi / α Fi , Among them, v casting h is the billet drawing speed of the continuous casting machine. casting v represents the thickness of the continuously cast billet. Ri h is the rolling speed of the i-th roughing mill. Ri Let v be the exit thickness of the i-th roughing mill. Fi h is the rolling speed of the i-th finishing mill. Fi Let α be the exit thickness of the i-th finishing mill. Ri α is the speed correction factor for the i-th roughing mill. Fi is the speed correction coefficient for the i-th finishing mill.

6. The method for rolling special steel according to claim 1, characterized in that, The process of obtaining the rolling torque and rolling power based on the rolling force includes: The rolling torque is obtained from the rolling force, wherein the rolling torque is: Where M is the rolling torque and P is the rolling force. l is the lever arm coefficient. c The contact arc length; The rolling power is obtained based on the rolling force and the rolling torque, wherein the rolling power is: N = Mn / 971, Wherein, N is the rolling power, M is the rolling torque, and n is the rotational speed of the neutral roll.

7. The method for rolling special steel according to claim 1, characterized in that, Also includes: The rolling time is obtained using the rolling parameter information and the rolling speed, wherein the rolling time is: t j =H×L / h out / v, Among them, t j The rolling time is given, where H is the thickness of the continuously cast billet, L is the length of the continuously cast billet, and h is the rolling time. out Where ν is the strip exit thickness and ν is the rolling speed; The gap time is obtained by using the rolling parameter information and the rolling speed, wherein the gap time is: t jx =L m / v, Among them, t jx L is the interval time. m ν is the stand spacing, and ν is the rolling speed.

8. A special steel rolling apparatus, characterized in that, include: The rolling speed acquisition module is used to obtain the rolling speed of each rolling mill based on rolling parameter information and rolling mill speed correction coefficient, wherein the rolling mill speed correction coefficient includes the speed correction coefficient of each roughing mill and the speed correction coefficient of each finishing mill. The rolling force acquisition module obtains the rolling force through the rolling parameter information, wherein the rolling force is used to represent the pressure applied to the steel by each rolling mill; A rolling torque and rolling power acquisition module is used to obtain rolling torque and rolling power based on the rolling force, wherein the rolling torque is used to represent the torque required for each rolling mill to complete the rolling process; The special steel rolled product acquisition module is used to control each rolling mill to obtain special steel rolled products based on the rolling speed, the rolling force, the rolling torque and the rolling power.

9. An electronic device, characterized in that, Including memory and processor; The memory is used to store computer programs; The processor is configured to implement the special steel rolling method as described in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, implements the special steel rolling method as described in any one of claims 1 to 7.

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