CN114798737A - Plate shape control method for producing ultra-thin checkered plate by thin slab continuous casting and rolling - Google Patents
Plate shape control method for producing ultra-thin checkered plate by thin slab continuous casting and rolling Download PDFInfo
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- 238000005096 rolling process Methods 0.000 title claims abstract description 101
- 238000009749 continuous casting Methods 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 37
- 239000010959 steel Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 29
- 241000282326 Felis catus Species 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 22
- 238000005266 casting Methods 0.000 claims description 19
- 229910000997 High-speed steel Inorganic materials 0.000 claims description 12
- 238000003723 Smelting Methods 0.000 claims description 9
- 229910018487 Ni—Cr Inorganic materials 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000010923 batch production Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 2
- 244000046052 Phaseolus vulgaris Species 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
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- 238000012360 testing method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
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- 238000005336 cracking Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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- 238000007668 thin rolling process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- B21B1/46—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 metal immediately subsequent to continuous casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
-
- 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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0057—Coiling the rolled product
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Abstract
The invention discloses a plate shape control method for producing an ultrathin checkered plate by continuous casting and rolling of a thin slab, belonging to the technical field of checkered plate production, wherein the method comprises the following steps: c in the smelted molten steel: 0.01-0.06% and Mn is more than or equal to 0.06%; continuous casting: controlling the temperature of the cat ear at 45-55 ℃; continuous rolling: the rough rolling inlet temperature is not lower than 960 ℃, and the finish rolling outlet temperature is not lower than 820 ℃; in the finish rolling, an F5 working roll is in a single-cone section pattern roll shape, a roll shape with a convexity of 0-100 um is adopted, and a lower working roll has a convexity of-100-300 um; f3, F4 and F5 are thrown into a roll shifting mode; the rolling force of the stand is set by adopting a control method of gradually increasing F1 and F2; the trend that the loads of F3 and F4 are gradually reduced; f5 rolling force is 0.9-1.1 MN when the F5 is rolled to the specification of 1.2mm and below; the coiling temperature was 530 ℃ and 630 ℃. Compared with the prior art, the probability of occurrence of poor plate shape is effectively reduced.
Description
Technical Field
The invention relates to a steel production technology, in particular to a plate shape control method for producing a thin checkered plate based on a thin slab continuous casting and rolling production line.
Background
The checkered plate is widely applied to an anti-skid steel plate used in construction, transportation and public places, and in recent years, the requirements of customers on the reduction of the thickness of strip steel and the quality of the plate shape are improved. In order to meet the market demand, the applicant develops a method for producing a thin-specification pattern steel plate based on an ESP thin slab continuous casting and rolling process (CN201610402699.3), and raw materials are smelted in a converter and an LF furnace; molten steel formed by smelting in an LF furnace is processed by an ESP production line, a patterned roller and a concave roller to form patterned strip steel with different thickness specifications of 1.2-1.5 mm.
However, the technical scheme can be used for producing the checkered plates with the thin specifications of 1.2-1.5 mm in batches, and meanwhile, as the checkered rollers use the concave rollers, the local stress concentration of the rollers is easy to cause along with the extension of the rolling kilometers, the abrasion of the rollers forms severe box-shaped holes, so that the plate shape is not controlled in the later rolling period, and the rolling kilometers are limited (less than 50 km). When an extremely thin specification (1.0-1.2 mm) is produced, obvious edge waves exist in the later rolling stage, the requirement of a customer can be met only by leveling for multiple times, the secondary leveling rate reaches 19.8%, and meanwhile, the condition that the shape of a steel coil cannot meet the requirement of the customer after being leveled for multiple times due to a small amount of waves is serious, so that the production cost of an enterprise is greatly increased.
In order to meet the thinning requirement of customers on the checkered plate and meet the plate shape quality of the checkered plate with an extremely thin specification (1.0-1.2 mm), a production method for producing the checkered plate with the extreme thin specification and good plate shape precision in a large batch mode is urgently needed, and higher added value is created for enterprises while the customer requirement is met.
Disclosure of Invention
The technical task of the invention is to provide a method for controlling the shape of an extremely thin checkered plate produced by continuous casting and rolling of a thin slab, aiming at the defects of the prior art.
The technical scheme for solving the technical problem is as follows: a method for controlling the shape of an extremely-thin checkered plate produced by thin slab continuous casting and rolling comprises smelting, continuous casting, continuous rolling and cooling coiling, wherein the continuous rolling comprises rough rolling, induction heating and finish rolling; the method is characterized in that:
s1, smelting: c in the molten steel: 0.01-0.06% and Mn is more than or equal to 0.06%;
s2, continuous casting: controlling the temperature of the cat ear at 45-55 ℃;
s3, continuous rolling: the rough rolling inlet temperature is not lower than 960 ℃, and the finish rolling outlet temperature is not lower than 820 ℃; in the finish rolling, high-speed steel rollers are adopted for F1, F2 and F3, high-speed steel rollers or high-nickel-chromium rollers are adopted for F4, and high-nickel-chromium rollers are adopted for F5; the F5 working roll is a single-cone section pattern roll, adopts a roll shape with a convexity of 0-100 um, and the convexity of the lower working roll is-100-300 um; f3, F4 and F5 are thrown into a roll shifting mode; the rolling force of the frame is set by adopting a control method of gradually increasing F1 and F2, and the range of the rolling force is between 1.4MN and 2.3 MN; the loads of F3 and F4 gradually decrease, and the rolling force is controlled between 1.2MN and 1.9 MN; f5 rolling force is 0.9-1.1 MN when the F5 is rolled to the specification of 1.2mm and below;
s4, cooling and coiling: the coiling temperature was 530 ℃ and 630 ℃.
In the continuous casting, the continuous casting drawing speed is improved to 4.8m/min from 3.8m/min within 200t before casting, and the transverse section temperature difference of a casting blank is less than 30 ℃.
In the continuous casting, the drawing speed is more than or equal to 4.8m/min after 200t of steel passing, and the temperature difference of the transverse section of the casting blank is less than 25 ℃.
In the continuous rolling, the inlet temperature of rough rolling is not lower than 960 ℃, the induction heating temperature is not higher than 1170 ℃, the outlet temperature of finish rolling is not lower than 820 ℃ within 200t before the casting, and the production thickness specification is kept to be larger than or equal to 1.5 mm.
In the finish rolling, the material of the roller is selected according to the kilometer number of F4, the kilometer number of the rolling process is more than or equal to 80KM, a high-speed steel roller is adopted, and a high-speed steel roller or a high nickel-chromium roller is adopted when the kilometer number is less than 80 KM.
In the finish rolling, the kilometers of single casting are more than 100KM, and the modes of F1 and F2 are used for roll shifting.
In the finish rolling, the roller profile crown of the backup roller is 200 um.
In the cooling coiling, the laminar cooling mode is front-stage cooling.
And the front-section cooling header is subjected to side blowing.
In the cooling winding, the openings of the high-speed flying shear and the side guide plate of the winding machine are controlled in a sparkless manner.
Compared with the prior art, the invention has the following outstanding beneficial effects:
1. the invention is adjusted in many aspects through the continuous casting process, the roller shape design and the automatic control model, the main rolling is carried out on the pattern steel plate with the thin specification of less than or equal to 1.2mm, the number of kilometers produced by the pattern steel plate with the single rolling process is more than 80km, the limit thin specification proportion of less than or equal to 1.2mm accounts for more than 63 percent, the reject ratio of one-time leveling is reduced from the initial 19.8 percent to 0.05 percent, and the annual leveling cost is reduced by hundreds of thousands of yuan;
2. the method improves the plate shape of the checkered plate with the ultrathin specification (1.0-1.2 mm), effectively reduces the probability of bad plate shape occurrence, greatly improves the quality of the real plate shape, and reduces the customer quality complaints while maintaining the enterprise brand.
Detailed Description
The present invention will be further described with reference to the following embodiments.
For the purposes of the following detailed description, it is to be understood that the invention may assume various alternative variations and step sequences, except where expressly specified to the contrary. Moreover, other than in any operating examples, or where otherwise indicated, all numbers expressing, for example, quantities of ingredients used in the specification and claims are to be understood as being modified in all instances by the term "about". At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.
Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
It should also be understood that any numerical range recited herein is intended to include all sub-ranges subsumed therein. For example, a range of "1 to 10" is intended to include all sub-ranges between (and including) the recited minimum value of 1 and the recited maximum value of 10, that is, having a minimum value equal to or greater than 1 and a maximum value of equal to or less than 10.
In this application, the use of the singular includes the plural and plural encompasses singular, unless specifically stated otherwise. In addition, in this application, the use of "or" means "and/or" unless explicitly stated otherwise, even though "and/or" may be explicitly used in some cases. Further, in this application, the use of "a" or "an" means "at least one" unless specifically stated otherwise. For example, "a" first material, "a" coating composition, and the like refer to one or more of any of these items.
The invention provides a method for controlling the shape of an ultrathin checkered plate produced by thin slab continuous casting and rolling, wherein the technological process is based on a thin slab continuous casting and rolling production line and comprises smelting, continuous casting, continuous rolling and cooling coiling.
S1 smelting
The design range of the molten steel components is as follows: c: 0.01-0.06%, Si: 0.04-0.1%, Mn: 0.06-0.2%, S: less than or equal to 0.006 percent, P: less than or equal to 0.035%, N: less than or equal to 0.006 percent, and the balance of Fe and inevitable impurities. The component design is based on the purposes of effectively controlling the rolling force of thin rolling and simultaneously reducing cost and improving efficiency, wherein the content of C in molten steel is gradually reduced from thick to thin according to the condition of thinnest thickness of casting times, and the minimum content of C is 0.01 percent. Meanwhile, the Mn content does not relate to a high-strength checkered plate for a moment, and the components can be controlled to be below 0.1 percent so as to achieve the purposes of cost reduction and efficiency improvement.
And smelting the molten steel in an LF furnace and an RH furnace according to the components.
S2, continuous casting
Molten steel obtained by smelting enters a continuous casting machine to obtain a casting blank;
within 200t before casting, the continuous casting drawing speed is increased from 3.8m/min to 4.8m/min, and the transverse section temperature difference of a casting blank is less than 30 ℃; after 200t of steel, the drawing speed is more than or equal to 4.8m/min, and the temperature difference of the transverse section of the casting blank is less than 25 ℃. The key point is that the temperature of the casting blank corner is controlled, the temperature of the cat ear is controlled at 45-55 ℃, and the phenomenon that the local uneven abrasion at the two ends of the steel passing area of the roller is caused due to the over-low temperature of the corner is prevented, so that the rib wave shape is generated at the later rolling stage.
S3 continuous rolling
The method specifically comprises the following steps: rough rolling → induction heating → finish rolling.
And in the first 200t of the casting time, the rough rolling inlet temperature is not lower than 960 ℃, the rough rolling intermediate billet is gradually transited from 17mm to 10mm, then the rough rolling intermediate billet passes through an induction heating furnace, the induction heating temperature is not higher than 1170 ℃, the finish rolling outlet temperature is not lower than 820 ℃, and the production thickness specification is kept to be larger than or equal to 1.5 mm. After 200t of steel passing, the rough rolling inlet temperature is not lower than 980 ℃, the intermediate billet is transited to 8.5-10mm, the temperature of the induction heating furnace is not lower than 1090 ℃, the finish rolling outlet temperature is 830-860 ℃, and the main rolled material with the batch production specification of being less than or equal to 1.2mm is produced.
Controlling the material and the roll shape of the finish rolling roll:
1、F1、F2
all the high-speed steel rolls are threaded, and the roll shape adopts a cosine concave section roll shape; if the kilometer number of single casting time is more than 100KM, the roll shifting mode is used for F1 and F2, so that the conditions of later-stage convexity reduction and edge warping caused by large kilometer number and thin specification quantity are prevented.
2、F3、F4
F3 is a high-speed steel roller; f4 selecting roller material according to kilometer number, rolling process kilometer number is more than or equal to 80KM, high speed steel roller is adopted, and high speed steel roller or high nickel chromium roller is adopted when rolling process kilometer number is less than 80 KM. The roll shape is a single-cone roll shape capable of continuously shifting the roll; can effectively avoid watering time later stage cross section after the kilometer number extension and stick up the limit wave shape that the limit leads to.
3、F5
(1) Selecting the material of the working roll: and (4) adopting a high nickel-chromium roller to form a roller.
(2) Roll forming:
in the prior art, the pattern rollers are flat rollers, and the lower rollers are concave rollers, so that the good rate of plate shapes with the specification of rolling less than 1.2mm (the rolling quantity is more than 600t) in large batches cannot be effectively ensured.
The F5 working roll is a single-cone section pattern roll, adopts a roll with a convexity of 0-100 um, and the convexity of the lower working roll is-100-300 um, so as to ensure that the convexity of the finished product is controlled to be 10-20 um.
The initial roll crown is based on the main embossed panel thickness and is specified in the following table.
| Main rolling thickness | Convexity of patterned roller | Crown of lower roll |
| 1.5mm | -100um | -300um |
| 1.2mm | -50um | -200um |
| ≤1.0mm | 0 | -100um |
Pattern roller supporting roller shape: because the checkered plate production F5 adopts special roll-shaped working roll, and the special checkered roll supporting roll is correspondingly designed, the convexity of the supporting roll is adjusted to 200um, so that the phenomena of roll meat falling and edge narrow wave caused by stress concentration caused by abnormal abrasion of the edge of the supporting roll are prevented.
(3) F5 roll-over strategy: in order to ensure the smoothness of the rolled section with the specification of less than or equal to 1.2mm at the later stage and avoid the poor plate shape and the steel strip ribbing caused by local high points due to the uneven wear during the long kilometer number rolling of the steel strip, F5 is put into an on-machine continuous dynamic roll shifting mode to avoid the box-shaped holes caused by the uneven wear and the non-roll shifting.
Setting the rolling force of the five finish rolling stands: in order to ensure the plate shape stability in the later rolling stage, a control method of gradually increasing the rolling force of the stand by F1 and F2 is adopted, and the range of the rolling force is between 1.4 and 2.3 MN; the loads of F3 and F4 gradually decrease, and the rolling force is controlled between 1.2MN and 1.9 MN; f5 needs to take account of both easy formability of patterned beans and roll protection, and F5 has a rolling force of 0.9-1.1 MN when the F5 is rolled to the specification of 1.2mm or below. Furthermore, for the rolling program with load correction, a special code is established in the second level, so that the phenomenon that the rolling force of other steel grades genetically affects the thin specification load correction of the checkered plate is prevented.
S4, cooling and coiling
The laminar cooling mode is front-section cooling, the coiling temperature is adjusted to 530-630 ℃ according to the thickness of the strip steel, and the coiling temperature with the same specification is high, so that the occurrence of cooling edge waves is favorably prevented.
The front section cooling collecting pipe is blown from the rear side, so that no water is accumulated in the layer cooling strip steel, and the wave shape caused by uneven cooling of the strip steel can be avoided.
The openings of the high-speed flying shears and the side guide plate of the coiling machine are controlled in a sparkless mode in the coiling process, and the defect of poor plate shape caused by edge scraping of the edge due to the fact that strip steel is not in continuous contact with the side guide plate is avoided.
To better compare the formulations of the present application with the prior art, comparative tests were performed.
Examples 1 to 4 are the molten steel composition and production process of the present application.
The control groups 1 and 2 adopt the molten steel components and the process scheme in a method for producing thin pattern steel plates based on an ESP thin slab continuous casting and rolling process (CN 201610402699.3). In the continuous casting process, the temperature of the casting blank corner is not controlled, and the temperature of the cat ear fluctuates between 10 and 30 ℃; the pattern roller of finish rolling F5 is the plain-barreled roll, and the lower roll is the concave roll, and the backing roll convexity is 100 um.
1. Designing each component:
| element(s) | C | Si | Mn | P | S | N |
| Example 1 | 0.05 | 0.048 | 0.15 | 0.01 | 0.006 | 0.002 |
| Example 2 | 0.04 | 0.06 | 0.12 | 0.012 | 0.005 | 0.004 |
| Example 3 | 0.018 | 0.06 | 0.08 | 0.01 | 0.004 | 0.003 |
| Example 4 | 0.015 | 0.045 | 0.1 | 0.01 | 0.004 | 0.002 |
| Control group 1 | 0.05 | 0.048 | 0.15 | 0.01 | 0.006 | 0.002 |
| Control group 2 | 0.02 | 0.046 | 0.1 | 0.011 | 0.004 | 0.002 |
See table below for various sets of production parameter control:
2. see table below for various sets of stand rolling force settings:
the comparison results are shown in the following table:
from the above results, it can be seen that a patterned steel sheet having a thickness of 0.8 to 1.5mm can be produced using the respective example sets of the present invention. The method mainly rolls the pattern steel plate with the thin specification of less than or equal to 1.2mm, the kilometer number of the single-rolling-process pattern steel plate is more than 80km, the percentage of the single-rolling-process pattern steel plate in the production process accounts for more than 63 percent, the percentage of defective products of one-time flattening is reduced from 19.8 percent to 0.05 percent, the thickness of the pattern steel plate with the thickness of 1.0mm is actually measured, the thickness of the base plate is 1.005mm, the height of a bean is 0.188mm, the effects in the aspects of batch production and plate shape retention capacity are obvious, and the market customer requirements of the pattern steel plate with the thin specification are met. When the comparison group 1 produces the pattern plate with the specification of 1.2mm, due to poor matching performance of the roll shape, the roll shifting strategy, the load setting, the automatic control model and the like with the production of the thin-specification pattern plate, the probability of double-edge waves is increased sharply, and the higher primary flattening reject ratio is generated; the control group 2 had a phenomenon of roller cracking and could not satisfy the continuous batch production of thin gauge.
It should be noted that while the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various obvious changes can be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A method for controlling the shape of an extremely-thin checkered plate produced by thin slab continuous casting and rolling comprises smelting, continuous casting, continuous rolling and cooling coiling, wherein the continuous rolling comprises rough rolling, induction heating and finish rolling; the method is characterized in that:
s1, smelting: c in the molten steel: 0.01-0.06% and Mn is more than or equal to 0.06%;
s2, continuous casting: controlling the temperature of the cat ear at 45-55 ℃;
s3, continuous rolling: the rough rolling inlet temperature is not lower than 960 ℃, and the finish rolling outlet temperature is not lower than 820 ℃; in the finish rolling, high-speed steel rollers are adopted for F1, F2 and F3, high-speed steel rollers or high-nickel-chromium rollers are adopted for F4, and high-nickel-chromium rollers are adopted for F5; the F5 working roll is a single-cone section pattern roll, adopts a roll shape with a convexity of 0-100 um, and the convexity of the lower working roll is-100-300 um; f3, F4 and F5 are in a roll shifting mode; the rolling force of the frame is set by adopting a control method of gradually increasing F1 and F2, and the range of the rolling force is between 1.4MN and 2.3 MN; the loads of F3 and F4 gradually decrease, and the rolling force is controlled between 1.2MN and 1.9 MN; f5 rolling force is 0.9-1.1 MN when the F5 is rolled to the specification of 1.2mm and below;
s4, cooling and coiling: the coiling temperature was 530 ℃ and 630 ℃.
2. The method for controlling the shape of a very thin checkered plate produced by continuous casting and rolling of a thin slab as claimed in claim 1, wherein: in the continuous casting, the continuous casting pulling speed is increased to 4.8m/min from 3.8m/min within 200t before casting, and the transverse section temperature difference of a casting blank is less than 30 ℃.
3. The method for controlling the shape of the ultra-thin checkered plate produced by continuous casting and rolling of the thin slab as claimed in claim 2, wherein: in the continuous casting, the drawing speed is more than or equal to 4.8m/min after 200t of steel passing, and the temperature difference of the transverse section of a casting blank is less than 25 ℃.
4. The method for controlling the shape of the ultra-thin checkered plate produced by continuous casting and rolling of the thin slab as claimed in claim 2, wherein: in the continuous rolling, the inlet temperature of rough rolling is not lower than 960 ℃, the induction heating temperature is not higher than 1170 ℃, the outlet temperature of finish rolling is not lower than 820 ℃ within 200t before the casting, and the production thickness specification is kept to be larger than or equal to 1.5 mm.
5. The method for controlling the shape of a very thin checkered plate produced by continuous casting and rolling of a thin slab as claimed in claim 1, wherein: in the finish rolling, the material of the roller is selected according to the kilometer number of F4, the kilometer number of the rolling process is more than or equal to 80KM, a high-speed steel roller is adopted, and a high-speed steel roller or a high nickel-chromium roller is adopted when the kilometer number is less than 80 KM.
6. The method for controlling the shape of a very thin checkered plate produced by continuous casting and rolling of a thin slab as claimed in claim 1, wherein: in the finish rolling, the kilometers of single casting time is more than 100KM, and roll shifting modes are adopted for F1 and F2.
7. The method for controlling the shape of a very thin checkered plate produced by continuous casting and rolling of a thin slab as claimed in claim 1, wherein: in the finish rolling, the roller shape convexity of the supporting roller is 200 um.
8. The method for controlling the shape of the thin-slab continuous casting and rolling ultrathin-specification checkered plate as claimed in claim 1, characterized by comprising the following steps of: in the cooling coiling, the laminar cooling mode is front-stage cooling.
9. The method for controlling the shape of the ultra-thin checkered plate produced by continuous casting and rolling of the thin slab as claimed in claim 8, wherein: the front section cooling header is back-blown with side-blown.
10. The method for controlling the shape of a very thin checkered plate produced by continuous casting and rolling of a thin slab as claimed in claim 1, wherein: in the cooling coiling, the openings of the high-speed flying shear and the side guide plate of the coiling machine are controlled in a sparkless mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210453729.9A CN114798737B (en) | 2022-04-27 | Plate shape control method for producing ultra-thin pattern plate by continuous casting and rolling of thin plate blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210453729.9A CN114798737B (en) | 2022-04-27 | Plate shape control method for producing ultra-thin pattern plate by continuous casting and rolling of thin plate blank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114798737A true CN114798737A (en) | 2022-07-29 |
| CN114798737B CN114798737B (en) | 2024-04-30 |
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| JP2002346710A (en) * | 2001-05-29 | 2002-12-04 | Katsuhiko Yamada | Continuous casting and rolling method |
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