CN115591948A - Method for improving ESP strip steel section size control precision - Google Patents
Method for improving ESP strip steel section size control precision Download PDFInfo
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- CN115591948A CN115591948A CN202211254566.8A CN202211254566A CN115591948A CN 115591948 A CN115591948 A CN 115591948A CN 202211254566 A CN202211254566 A CN 202211254566A CN 115591948 A CN115591948 A CN 115591948A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 30
- 239000010959 steel Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005096 rolling process Methods 0.000 claims abstract description 47
- 238000005299 abrasion Methods 0.000 claims abstract description 38
- 238000005266 casting Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims description 19
- 230000006698 induction Effects 0.000 claims description 16
- 238000009749 continuous casting Methods 0.000 claims description 7
- 230000006872 improvement Effects 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 5
- 230000000630 rising effect Effects 0.000 abstract description 2
- 230000037303 wrinkles Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 241000282326 Felis catus Species 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000013000 roll bending Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/40—Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/12—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll camber
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
A method for improving the control precision of the section size of ESP strip steel comprises a frame body and is characterized in that: the frame body is provided with an upper roller A and a lower roller B which are used for setting rough rolling or finish rolling casting blanks in pairs, and the method comprises the following control steps: (1) Setting the initial taper section height of an initial upper roller A and an initial taper section height of a lower roller B as A, and setting the taper section length as L; the initial upper roller A and the lower roller B have the same value of the height A of the conical sections; (2) measuring the abrasion loss of the upper roll and the lower roll: measuring the abrasion loss of the two components as delta r1 and delta r2 respectively; the roll shifting amount is = the abrasion amount delta r/the height A of the conical section, and delta r = delta r1= delta r2; the taper height A2 is guaranteed to be of a size that satisfies the formula A2= A1 × Δ r2/Δ r1. The method solves the problems of strip shape defects such as wave shape, rib rising, wrinkle and the like of the strip steel in the middle and later stages of the rolling process, prolongs the kilometers of the single-pouring rolling process, and has obvious cost reduction and efficiency improvement effects.
Description
Technical Field
The invention discloses a method for improving the control precision of the section size of ESP strip steel.
Background
The ESP endless rolling production line finish rolling working roll is designed as a conical roll, the middle part of the roll surface of the roll is inwards sunken, and one end of the roll is of a frustum structure with a thick inside and a thin outside; the other end of the roller is cylindrical; the upper roller and the lower roller have the same roller shape and opposite directions.
In the rolling process, the abrasion of the rollers is compensated through the roller shifting, and the roller shifting step length of the upper roller and the lower roller is the same. Roll-over = wear/cone height. See figure 1. But the upper and lower rollers are inevitably worn inconsistently due to the temperature difference of the upper and lower surfaces of the strip steel and the influence of the loop on the wrap angle of the upper working roller during rolling. Therefore, along with the extension of the number of kilometers rolled in a single casting time, the upper roller and the lower roller can not simultaneously meet the requirements of roller shifting and abrasion matching, the control precision of the section size of the strip steel in the middle and later periods can be gradually reduced along with the extension of the number of kilometers rolled, and the problems of strip shape defects such as wave shape, rib rising, folding and the like can easily occur.
The method is characterized in that according to a formula H = A-B, the length of a supporting roller-C, and the coefficient of the roller-C, wherein H represents a local high point of the section of the strip steel, and A is a coefficient 158; b is coefficient, 0.13; c is coefficient, 0.5; then presetting local high points of the section of the strip steel, calculating the length of the supporting roll and the roll shifting coefficient reversely, and adjusting the length and the roll shifting coefficient, thereby realizing the control of the section size of the thin-specification strip steel. The problem of inconsistent abrasion of the upper roller and the lower roller is not considered by the formula, the plate shape control in the middle and later periods is not facilitated, and the plate shape defect is easy to occur.
The patent number CN201620572000.3 discloses a long kilometer number rolling roller for an ESP production line, wherein the middle part of the roller surface of the roller is inwards concave, and one end of the roller is of a frustum structure with a thick inner part and a thin outer part, so that the roller surface forms a compensation slope; the other end of the roller is cylindrical; the upper roller and the lower roller have the same roller shape and opposite directions. The roller shape design also does not consider the problem of inconsistent abrasion of the upper roller and the lower roller caused by working conditions.
Patent No. CN109772897A discloses a setting control method for improving the full-length convexity and wedge precision of hot continuous rolling strip steel, the setting upper limit of a PC angle when the wedge is good is determined through statistics of the setting range of the PC angle when the convexity and the wedge of historical production strip steel are both good, according to the statistical result, when subsequent rolling strip steel is set, the control range of the PC angle and the bending roll force is reasonably distributed, the upper limit of the PC angle which is counted is used as the setting upper limit of the PC angle, after the PC angle is set to be limited, the part with insufficient convexity control capacity is compensated by the bending roll force, the convexity control precision is met, and meanwhile, the precision of finish rolling outlet wedge control is guaranteed. The roll shape design of the scheme is inconsistent with ESP, and the process flow is different without a conventional hot continuous rolling production line.
In addition, in the thin material rolling production process of an ESP production line, the problem of the reverse tilting of the edge of the intermediate blank and the edge of the cross section of a finished product often occurs, see attached figures 3 and 4, namely the condition that the upper roller and the lower roller are not abraded uniformly occurs at the frame selection part. By adopting measures of correcting the roll shapes of the supporting roll and the working roll, continuously optimizing roll shifting compensation, adjusting load distribution and roll bending force and the like, the obvious improvement effect is not obtained all the time, the root of the problem is not to find the direction all the time, and the problem of edge reverse warping also influences the size control precision of the section of the strip steel.
Therefore, the research on how to improve the control precision of the section size of the ESP hot-rolled strip steel, solve the problem of strip shape defects in the middle and later stages of the rolling process and prolong the kilometer number of the casting times is a key core problem to be solved urgently for cost reduction and efficiency improvement of the ESP.
Disclosure of Invention
In order to solve the problems, the invention discloses a method for improving the control precision of the section size of ESP strip steel, which comprises the steps of forming a condition of stable working condition by controlling technological parameters such as continuous casting pulling speed, rough rolling inlet temperature, induction heating outlet temperature and the like, and further providing a precondition for forming a stable abrasion rule and a solidifying roll shape design; the method comprises the steps of controlling the high points of the edge of an intermediate blank and the edge of a finished product by using a heater of the edge before rough rolling and increasing the temperature of the edge of an induction heating outlet; the method comprises the steps of configuring the heights of the conical sections with different sizes by pressing the abrasion proportion of the upper roller and the lower roller to the conical roller, ensuring that the roll profiles of the concave sections and the conical sections of the roller bodies of the upper roller and the lower roller can always keep ideal roll profile curves.
The technical scheme of the invention is as follows:
a method for improving the control precision of the section size of ESP strip steel comprises a frame body and is characterized in that: the machine frame body is provided with rollers which are used for the paired arrangement of rough rolling or finish rolling areas, the rollers comprise rollers which are arranged in pairs and each roller comprises an upper roller A and a lower roller B, and the method comprises the following control steps:
(1) Setting the initial taper section height of an initial upper roller A and an initial taper section height of a lower roller B as A, and setting the taper section length as L;
the initial upper roller A and the lower roller B have the same value of the height A of the conical sections;
(2) Measuring the abrasion loss of the upper roller and the lower roller:
measuring the wear loss of the upper roller A and the lower roller B as delta r1 and delta r2 respectively, and comparing the wear loss of the upper roller A and the lower roller B;
when delta r1= delta r2, compensating the abrasion of the roller according to the adjustment of the roll shifting amount;
the roll shifting amount is = abrasion amount Δ r/cone section height a, Δ r = Δ r1= Δ r2;
when delta r1 is not equal to delta r2, keeping the position of the roller with more uniform axial wear loss unchanged, and adjusting the height of the radial conical section of the roller with larger wear loss:
setting the height of a roller conical section with a constant position as A1; the height of the adjusted conical section of the corresponding roller is A2;
ensuring that the height A2 of the conical section meets the formula A2= A1 × Δ r2/Δ r1, wherein Δ r2 is the abrasion of the roller with the height of the conical section needing to be adjusted, and Δ r1 is the abrasion of the roller without the height of the conical section needing to be adjusted.
Specifically, the height A of the conical section is 0.5-1.8mm, the roll shifting amount is inversely proportional to the height of the conical section, and the properly increased height of the conical section can reduce the roll shifting amount of a single piece of steel, so that the capability of casting for long kilometers in rolling is improved.
Specifically, an edge heater is arranged in front of the rough rolling area, the power of the edge heater is set to be 200-800KW, and the width of the edge of the casting blank covered by the edge heater is 1.6% -12%.
Specifically, an induction heating furnace is arranged in front of the finish rolling area, the induction heating furnace is a transverse magnetic induction heating furnace, the outlet temperature is set to be 1080-1180 ℃, and the width of the edge part of the edge blank covered by the heating furnace module is 0.4-3.2%.
Specifically, the thickness of the casting blank is 90-110mm, the edge heater is used in a continuous casting step, a drawing speed value is set in the continuous casting step, and the continuous casting drawing speed value is set to be 4.8-5.5m/min.
Specifically, the temperature of the rough rolling inlet is 980-1080 ℃, and the temperature of the induction heating furnace outlet is 1080-1180 ℃.
Compared with the prior art, the invention has the following beneficial effects:
(1) Compared with the prior art, the invention discloses a method for improving the control precision of the section size of an ESP hot-rolled strip steel, which improves the control precision of the section size of an ESP finished product, solves the problems of strip shape defects such as wave shape, ribbing, wrinkling and the like of the strip steel in the middle and later stages of a rolling process, prolongs the kilometer number of single-casting rolling, and has obvious cost reduction and efficiency improvement effects.
(2) In the invention, the increased height of the conical section can reduce the roll shifting compensation amount of a single steel block, thereby improving the capability of rolling for a long kilometer and casting times.
Drawings
FIG. 1 is a schematic structural view of an ESP hot rolling roll;
FIG. 2 is a schematic view of roll wear;
FIG. 3 is a schematic view of the edge portion of the finished product cross section being turned up;
FIG. 4 is a schematic view showing the edge of the intermediate slab and the edge of the cross section of the finished product being turned up;
FIG. 5 is a diagram showing the case where Δ r1 > Δ r2 is used in the embodiment;
FIG. 6 is a diagram showing the case where Δ r1 < Δ r2 in the embodiment;
FIG. 7 is a schematic view showing that the upper and lower rollers are uniformly worn after adjustment;
FIG. 8 is a schematic view of an edge heater covering a cast slab in accordance with the present invention;
FIG. 9 is a schematic view of a transverse magnetic induction heating furnace according to the present invention covering the edge of a casting blank;
in the figure: 10-upper roller A,20-0 lower roller B, 30-edge heater and 40-strip steel.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 and 8, a method for improving the accuracy of controlling the section size of an ESP strip comprises the following steps of qualified molten steel → continuous casting → an edge heater 30 → rough rolling → transverse magnetic induction heating → finish rolling → layer cooling → high speed flying shear → coiling.
The concrete structure includes the frame body, the frame body is equipped with and is used for rolling the regional slab of rough rolling or finish rolling and sets up the roll in pairs, the roll is including the last roller A10 and the lower roll B20 that set up in pairs, including following control step:
(1) Setting the initial height of the conical sections of the initial upper roller A and the lower roller B as M, the length of the conical sections as L, and the height of the conical sections A = M/L;
the initial upper roller A and the lower roller B have the same value of the height A of the conical sections;
(2) Measuring the abrasion loss of the upper roller and the lower roller:
measuring the wear loss of the upper roller A and the lower roller B as delta r1 and delta r2 respectively, and comparing the wear loss of the upper roller A and the lower roller B;
when delta r1= delta r2, compensating the roller abrasion according to the adjustment of the roller shifting amount;
the roll shifting amount is = the abrasion amount delta r/the height A of the conical section, and delta r = delta r1= delta r2;
when delta r1 is not equal to delta r2, keeping the position of the roller with more uniform axial wear loss unchanged, and adjusting the height of the radial conical section of the roller with larger wear loss:
setting the height of a roller conical section with a constant position as A1; the height of the adjusted conical section of the corresponding adjusted roller is A2;
ensuring that the height A2 of the conical section meets the formula A2= A1 ×. Delta.r 2/ delta.r 1,1, wherein delta.r 2 is the abrasion of the roller with the height of the conical section needing to be adjusted, and delta.r 1 is the abrasion of the roller without the height of the conical section needing to be adjusted.
The magnitude of wear was measured as: (diameter of front working roll on machine) -diameter of rear working roll on machine. The size of the roll diameter is measured by a measuring arm of a grinding machine, and the central dimension of the roll-shaped concave section of the roll is taken as the standard.
Referring to fig. 1, in the concrete working process, the thickness of a casting blank is 90-110mm, the drawing speed is 4.8-5.5m/min, the rough rolling inlet temperature is 980-1080 ℃, and the outlet temperature of the induction heating furnace is 1080-1180 ℃. The method provides a precondition for forming a stable working condition and further forming a stable abrasion rule and a curing roll shape design.
The heights of the tapered sections of an upper roller A10 and a lower roller B20 which are subjected to finish rolling are respectively A1 and A2, A1= A2 in an initial state, the roll shifting directions of the upper roller and the lower roller are opposite, and the roll shifting amounts of single steel are the same and are S0. The abrasion of the upper roller of the finish rolling working roller is delta r1, and the abrasion of the lower roller of the finish rolling working roller is delta r2.
Ideally, if Δ r1= Δ r2, the upper and lower rolls of the same cone height, according to the logic of roll-shifting compensation: and (3) roll shifting quantity S = abrasion quantity delta r/cone section height A. The roll shifting amount can be adjusted, the abrasion of the roll can be effectively compensated, and the good matching of the roll shifting and the upper and lower abrasion can be realized.
The abrasion of the roller is compensated by transversely moving the working roller for a certain distance (shifting the roller), so that the roller shape at the center of the roller body is always kept in an even abrasion state and a roller shape close to the initial roller shape.
Roll shifting adjustment amount: and (3) roll shifting quantity delta S = wear quantity delta r/cone section height A.
In actual production, however, only one of the upper and lower rollers is worn and matched with the shifting roller because the upper and lower rollers are worn and abraded inconsistently.
Here, the roll shifting S0 and the wear Δ r1 are illustrated as good in matching (the surface wear after wear is uniform in a form close to the original state wear is uniform), and analyzed.
(1)Δr1＞Δr2
The lower roll will have the connection part of the concave section and the conical section worn in advance, when the connection part moves to the rolling central line continuously, the wear of the section is larger than that of the adjacent position, which causes the condition of uneven transverse wear of the roller, see the attached figure 5 (the left side of the figure 5 is the upper roll, the right side is the lower roll, and the frame selection part, namely the lower roll is worn in advance to cause the condition of uneven wear)
(2)Δr1＜Δr2
The lower roller has deeper abrasion of the concave section, the contact arc of the cone angle and the concave section is a box-shaped hole, and the lower roller is in a cat ear shape in serious cases, as shown in the attached figure 6. (in the figure 6, the left side is an upper roller, the right side is a lower roller, and the frame selection part, namely the lower roller is worn deeply and is in the shape of a cat ear.)
Therefore, in order to compensate for the difference in wear between the upper and lower rolls, the height of the tapered section of the roll must be adjusted.
When the delta r1 is larger than the delta r2 or the delta r1 is smaller than the delta r2, the true conical section height of the lower roller is adjusted by taking the upper roller with good matching between roll shifting and abrasion as a reference, keeping the true conical section height of the upper roller A1 unchanged, and adjusting the true conical section height A2= A1 x delta r 2/delta r1.
If the lower roll shifting is well matched with abrasion, and the upper roll is poor in matching, the method is opposite to the upper method.
After the adjustment, the upper roller and the lower roller are uniformly worn. See fig. 7.
Referring to fig. 7, during a specific operation, a temperature of an edge of a cast slab may be low, and under the action of a concave section roll shape of a roll body, a deformation reduction amount of the edge is large, so that a rolling force is increased, and a flattening deformation of the roll is increased, so that the edge is warped. When the rolling is carried out under the condition for a long time, the edge abrasion is aggravated, and the edge warping of the section is further aggravated;
the edge heater 30 can be used, the power of the edge heater 30 is set to be 200-500KW, the width of the covered edge is 1.6-12%, the purpose is to increase the temperature of the edge, the temperature of the edge after the edge heater is used is obviously increased by 100-150 ℃, the metal deformation resistance and the roller flattening deformation of the edge are reduced, the longitudinal fluidity of metal is enhanced, the edge profile of the intermediate billet is smooth, and the improvement effect is obvious.
Referring to fig. 8, during the specific operation, the problem of edge warping of the finished product may occur due to large heat loss at the edge and large deformation at the edge during the operation of the process channel and the finish rolling, and meanwhile, because the coverage of the edge is too small, the magnetic flux at the edge of the intermediate billet is reduced, the temperature rise of the corresponding edge is small, and the due temperature rise effect cannot be achieved. However, the excessive coverage of the edge part can cause the magnetic flux to be obviously increased, and further cause the problems of overhigh temperature of the edge part, iron sheet melting and incomplete scale removal and the press-in of the iron sheet oxide;
at the moment, compensation adjustment is carried out on the edge coverage, an induction heating furnace can be put into use, the induction heating furnace is a transverse magnetic induction heating furnace, the outlet temperature is set to be 1080-1180 ℃, the width of the edge of the intermediate billet covered by the heating furnace module is 0.4-3.2%, the precision of the section size is improved, the problems of plate defects such as 40 wave shapes, ribs, folds and the like of the strip steel in the middle and later stages of the rolling process are solved, the kilometers of single-pouring rolling are prolonged, and the cost reduction and efficiency improvement effects are remarkable.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. A method for improving the control precision of the section size of ESP strip steel comprises a frame body and is characterized in that: the frame body is provided with rollers which are used for rolling plate blanks in rough rolling or finish rolling areas and are arranged in pairs, the rollers comprise rollers A and rollers B which are arranged in pairs, and the frame body comprises the following control steps:
(1) Setting the initial taper section height of an initial upper roller A and an initial taper section height of a lower roller B as A, and setting the taper section length as L;
the initial upper roller A and the lower roller B have the same height A of the conical sections;
(2) Measuring the abrasion loss of the upper roller and the lower roller:
measuring the wear loss of the two rollers respectively to be delta r1 and delta r2, and comparing the wear loss of the upper roller A with the wear loss of the lower roller B;
when delta r1= delta r2, compensating the roller abrasion according to the adjustment of the roller shifting amount;
the roll shifting amount is = abrasion amount Δ r/cone section height a, Δ r = Δ r1= Δ r2;
when the delta r1 is not equal to the delta r2, keeping the position of the roller with more uniform axial abrasion loss unchanged, and adjusting the height of the radial conical section of the roller with larger abrasion loss:
setting the height of the roller conical section to be A1; the height of the adjusted conical section of the corresponding roller is A2;
ensuring that the height A2 of the conical section meets the formula A2= A1 × Δ r2/Δ r1, wherein Δ r2 is the abrasion of the roller with the height of the conical section needing to be adjusted, and Δ r1 is the abrasion of the roller without the height of the conical section needing to be adjusted.
2. The method for improving the control accuracy of the section size of the ESP strip steel according to claim 1, wherein the height A of the conical section is 0.5-1.8mm.
3. The method for improving the control accuracy of the section size of the ESP strip steel according to claim 1, wherein an edge heater is arranged in front of the rough rolling area, the power of the edge heater is set to be 200-800KW, and the edge heater covers the edge width of the casting blank by 1.6-12%.
4. The method for improving the control accuracy of the section size of the ESP strip steel according to claim 1, wherein an induction heating furnace is arranged in front of the area for finish rolling, the induction heating furnace is a transverse magnetic induction heating furnace, the outlet temperature is set to be 1080-1180 ℃, and the heating furnace module covers 0.4-3.2% of the edge width of an edge blank.
5. The method for improving the accuracy of controlling the section size of an ESP strip according to claim 1 or 3, wherein the thickness of the cast slab is 90-110mm, the edge heater is used in a continuous casting step, a casting speed value is set in the continuous casting step, and the casting speed value is set to be 4.8-5.5m/min.
6. The method for improving the control accuracy of the section size of the ESP strip steel according to claim 3, wherein the temperature at the rough rolling inlet is 980-1080 ℃, and the temperature at the outlet of the induction heating furnace is 1080-1180 ℃.
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| CN113263058A (en) * | 2021-04-23 | 2021-08-17 | 北京科技大学 | Roll shifting control method of hot continuous rolling finishing mill group considering hot roll shape |
| CN113316491A (en) * | 2019-01-28 | 2021-08-27 | 首要金属科技德国有限责任公司 | Changing the effective contour of the working surfaces of the working rolls during the hot rolling of a rolling stock in a rolling stand to a rolled strip |
| CN114769325A (en) * | 2022-04-26 | 2022-07-22 | 马鞍山钢铁股份有限公司 | Control method for roll shifting of hot continuous rolling CVC working roll |
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