CN116748296A - Temperature-control rolling method for medium-thickness steel plate - Google Patents
Temperature-control rolling method for medium-thickness steel plate Download PDFInfo
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- CN116748296A CN116748296A CN202310778321.3A CN202310778321A CN116748296A CN 116748296 A CN116748296 A CN 116748296A CN 202310778321 A CN202310778321 A CN 202310778321A CN 116748296 A CN116748296 A CN 116748296A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 283
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- 238000001816 cooling Methods 0.000 claims description 22
- 230000008569 process Effects 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000010079 rubber tapping Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000001953 recrystallisation Methods 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000033764 rhythmic process Effects 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
- B21B1/22—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
- B21B1/24—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 in a continuous or semi-continuous process
- B21B1/26—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 in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/002—Piling, unpiling, unscrambling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The application discloses a temperature control rolling method of a medium-thickness steel plate, which comprises the steps of enabling an N-2 plate blank subjected to first-stage rolling to pass through a rolling mill from a near-point track before a rolling mill to a far-point roller way after the rolling mill continuously to be warmed, enabling an N-1 plate blank subjected to first-stage rolling to pass through the rolling mill from a far-point track before the rolling mill to a near-point roller way after the rolling mill continuously to be warmed, carrying out first-stage rolling on the N plate blank, transferring the N plate blank to the far-point track before the rolling mill to be warmed after the first-stage rolling of the N plate blank is finished, enabling the N-1 plate blank to pass through the rolling mill to a near-point roller way before the rolling mill continuously to be warmed, returning the N-2 plate blank to the rolling mill to be subjected to second-stage rolling, and leaving a rolling procedure from the roller way after the rolling mill is finished. In the embodiment, on the premise that a side roller way is not required to be arranged, two chain type circulating rolling can be realized, and the production efficiency is improved while the waiting time of the medium steel plate is kept.
Description
Technical Field
The application relates to the technical field of medium steel plate rolling, in particular to a medium steel plate temperature control rolling method.
Background
In order to improve the microstructure of the medium steel plate and the comprehensive mechanical property of the medium steel plate, the application of the controlled rolling technology in the production of the medium steel plate is quite wide, and the medium steel plate is widely applied to various fields such as shipbuilding, construction, containers, bridges and the like. The control rolling technology needs to perform intermediate blank temperature waiting to control the rolling temperature, and is mainly divided into two stages at present, wherein the first stage is rough rolling high-temperature austenite recrystallization zone rolling, then the intermediate blank is subjected to temperature control, and the second stage is finish rolling austenite non-recrystallization zone temperature rolling, so that fine grain structure is obtained, mixed grain structure is prevented from occurring in the partial recrystallization zone temperature range, and the comprehensive mechanical property of the steel plate is improved.
At present, when the temperature control steel plate is produced in the plate working procedure, single block controlled rolling and more two blocks controlled rolling are generally adopted. Wherein the single block rolling control mode is that after the rolling of the first stage of the slab is finished, stopping the rolling for waiting for temperature, and then starting the rolling of the second stage; the two rolling control modes are that the first plate blank is heated after the first stage is rolled, then the second plate blank is heated before the first stage is rolled, then the second stage rolling of the first plate blank is carried out until the second stage rolling of the first plate blank is finished, and then the second stage rolling of the second plate blank is continued until the second stage rolling of the second plate blank is finished. However, the rolling efficiency of this rolling method is relatively low, and the rolling efficiency of the steel sheet is limited.
In view of this, the present application has been made.
Disclosure of Invention
The application aims to provide a temperature control rolling method for a medium steel plate, which improves the rolling efficiency of the medium steel plate.
The application is realized in the following way:
in a first aspect, the present application provides a temperature-controlled rolling method for a medium steel plate, comprising:
two chain type circulating rolling, namely, the N-2 plate blanks which finish the first-stage rolling pass through a rolling mill from a near-point track in front of the rolling mill to a far-point roller way behind the rolling mill continuously to be warmed, the N-1 plate blanks which finish the first-stage rolling pass through the rolling mill from a far-point track in front of the rolling mill to a near-point roller way behind the rolling mill continuously to be warmed, if the N plate blanks finish the previous working procedure at the moment, the N plate blanks are subjected to the first-stage rolling, the N plate blanks are transferred to the far-point track in front of the rolling mill to be warmed after the first-stage rolling of the N plate blanks is finished, the N-1 plate blanks pass through the rolling mill to the near-point roller way in front of the rolling mill continuously to be warmed, the N-2 plate blanks are returned to the rolling mill to be subjected to the second-stage rolling, and the N-2 plate blanks leave the rolling working procedure from the roller way behind the rolling mill after the second-stage rolling of the rolling mill is finished;
wherein N is more than or equal to 3, N is a positive integer, the distance between the rear far point track and the rolling mill is larger than the distance between the rear near point track and the rolling mill, and the distance between the front far point track and the rolling mill is larger than the distance between the front near point track and the rolling mill.
In an alternative embodiment, the thickness of the medium steel plate is greater than 40mm.
In an alternative embodiment, the method further comprises the following steps before rolling the nth slab:
performing first-stage rolling on the first slab, and if the second slab has completed the previous process when the first-stage rolling of the first slab is completed, transferring the first slab to a far-point track behind a machine for waiting for temperature;
performing first-stage rolling on the second slab, and if the first-stage rolling of the second slab is completed and the previous working procedure of the third slab is completed, transferring the second slab to a near-point track behind the machine for waiting for temperature;
the two-block chain circulation rolling step is then repeated.
In an alternative embodiment, if the N-2 th slab is passed through the rolling mill from the near-point track before the machine to the far-point roller way after the machine continues to be warmed, the N-1 th slab is passed through the rolling mill from the far-point track before the machine to the near-point roller way after the machine continues to be warmed, the N-1 th slab is passed through the rolling mill from the near-point roller way before the machine continues to be warmed, the N-2 th slab is returned to the rolling mill for second-stage rolling, and the rolling procedure is left from the rolling mill after the second-stage rolling of the N-2 th slab is completed.
In an alternative embodiment, if the N-th slab has completed the previous process after the second stage rolling of the N-2 th slab is completed, the N-th slab is subjected to the first stage rolling, the N-th slab is transferred to the far point track in front of the machine for waiting for temperature after the first stage rolling of the N-th slab is completed, the N-1 th slab is emptied from the rolling mill to the near point roller way in front of the machine for continuing waiting for temperature, and then the two chain type circulating rolling steps are repeated.
In an alternative embodiment, if the second stage rolling of the N-2 th slab is completed and the N-1 th slab has not completed the previous process, the N-1 th slab is returned to the rolling mill for the second stage rolling, and the second stage rolling of the N-1 th slab is completed and leaves the rolling process from the post rolling table of the rolling mill.
In an alternative embodiment, air cooling or natural cooling is adopted in the temperature control process.
In an alternative embodiment, the rolling mill is free of side-to-temperature roller ways both in front and back.
The application has the following beneficial effects:
in the rolling process of the medium steel plate, the temperature required by the first-stage rolling, namely rough rolling, is higher, the temperature required by the finish rolling of the second-stage rolling machine is lower, in addition, the thickness of the medium steel plate is larger, the cooling speed is low, so that the time to be warmed is relatively longer, the rolling efficiency is lower, a side roller way used for being warmed is arranged in the prior art so as to realize simultaneous rolling of a plurality of steel plates, but the side roller way is arranged to adjust equipment, the production cost and the occupied area are improved, the compact production environment of some equipment is not provided with the condition of the side roller way, in the embodiment, two chain type circulating rolling can be realized on the premise that the side roller way is not required to be arranged, and the production efficiency is improved while the time to be warmed of the medium steel plate is kept.
In the rolling process of the medium steel plate, the intermediate billet needs to be subjected to temperature waiting for a plurality of times after or before the rolling mill, the first-stage rolling of other steel plates is performed during the temperature waiting period of the intermediate billet is effectively utilized, the rolling efficiency control step is changed from the temperature waiting time to the rolling time, the utilization efficiency of the rolling mill is improved, and the rolling efficiency of the plate blank is improved.
In addition, the rolling of the thick steel plate can carry out tapping according to the tapping sequence on the basis of improving the rolling efficiency, and the tapping sequence is consistent with the tapping sequence, so that the marking or tracking of the plate blank is facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of temperature-controlled rolling tracking of a medium steel plate in the application;
FIG. 2 is a flow chart of a medium steel plate temperature control rolling queue in the application;
FIG. 3 is a graph showing the temperature of an intermediate blank in an embodiment of the present application;
FIG. 4 shows the temperature of the intermediate blank in the comparative example of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The features and capabilities of the present application are described in further detail below in connection with the examples.
In a first aspect, the present application provides a temperature-controlled rolling method for a medium steel plate, wherein a tracking flow chart and a queue flow chart are shown in fig. 1 and 2, and the method comprises:
two chain type circulating rolling, namely, the N-2 plate blanks which finish the first-stage rolling pass through a rolling mill from a near-point track in front of the rolling mill to a far-point roller way behind the rolling mill continuously to be warmed, the N-1 plate blanks which finish the first-stage rolling pass through the rolling mill from a far-point track in front of the rolling mill to a near-point roller way behind the rolling mill continuously to be warmed, if the N plate blanks finish the previous working procedure at the moment, the N plate blanks are subjected to the first-stage rolling, the N plate blanks are transferred to the far-point track in front of the rolling mill to be warmed after the first-stage rolling of the N plate blanks is finished, the N-1 plate blanks pass through the rolling mill to the near-point roller way in front of the rolling mill continuously to be warmed, the N-2 plate blanks are returned to the rolling mill to be subjected to the second-stage rolling, and the N-2 plate blanks leave the rolling working procedure from the roller way behind the rolling mill after the second-stage rolling of the rolling mill is finished;
wherein N is more than or equal to 3, N is a positive integer, the distance between the rear far point track and the rolling mill is larger than the distance between the rear near point track and the rolling mill, and the distance between the front far point track and the rolling mill is larger than the distance between the front near point track and the rolling mill.
In the rolling process of the medium steel plate, the temperature required by the first-stage rolling, namely rough rolling, is higher, the temperature required by the finish rolling of the second-stage rolling machine is lower, in addition, the thickness of the medium steel plate is larger, the cooling speed is low, so that the time to be warmed is relatively longer, the rolling efficiency is lower, a side roller way used for being warmed is arranged in the prior art so as to realize simultaneous rolling of a plurality of steel plates, but the side roller way is arranged to adjust equipment, the production cost and the occupied area are improved, the compact production environment of some equipment is not provided with the condition of the side roller way, in the embodiment, two chain type circulating rolling can be realized on the premise that the side roller way is not required to be arranged, and the production efficiency is improved while the time to be warmed of the medium steel plate is kept.
In this embodiment, the steps may be performed sequentially in the order described above, and if the steps described later do not hinder the steps described earlier, the steps may be performed simultaneously, for example: the method comprises the steps of carrying out two steps of carrying out continuous temperature waiting on an N-2 plate blank which completes rolling in the first stage from a near-point track in front of a rolling mill to a far-point roller way behind the rolling mill, carrying out continuous temperature waiting on an N-1 plate blank which completes rolling in the first stage from a far-point track in front of the rolling mill to a near-point roller way behind the rolling mill, and carrying out continuous temperature waiting on the N-1 plate blank by carrying out the rolling mill to the near-point roller way in front of the rolling mill after the first stage is completed, wherein three plate blanks in the N-2 plate blank returning to the rolling mill for carrying out rolling in the second stage can be simultaneously moved, and can be sequentially moved under the condition that objective conditions are met.
In the rolling process of the medium steel plate, the intermediate billet needs to be subjected to temperature waiting for a plurality of times after or before the rolling mill, the first-stage rolling of other steel plates is performed during the temperature waiting period of the intermediate billet is effectively utilized, the rolling efficiency control step is changed from the temperature waiting time to the rolling time, the utilization efficiency of the rolling mill is improved, and the rolling efficiency of the plate blank is improved.
In addition, the rolling of the thick steel plate can carry out tapping according to the tapping sequence on the basis of improving the rolling efficiency, and the tapping sequence is consistent with the tapping sequence, so that the marking or tracking of the plate blank is facilitated.
According to the application, the intermediate blank can be naturally cooled, a cooling system is not required to cool down, the problems of uneven water cooling temperature of the intermediate blank and low air cooling temperature control efficiency of the intermediate blank are effectively solved, the phenomenon that the intermediate blank is severely tilted up or buckled down or even rolled piece waste is caused in the subsequent steel plate rolling process due to large head-tail temperature difference after water cooling is avoided, the stability of the rolling process of the temperature control plate in the finish rolling stage is improved, and the rolling rhythm and rolling efficiency are further improved.
In an alternative embodiment, the thickness of the medium steel plate is greater than 40mm, and when the thickness of the steel plate is greater than 40mm, the improvement of the rolling efficiency is more obvious.
In an alternative embodiment, the method further comprises the following steps before rolling the nth slab:
performing first-stage rolling on the first slab, and if the second slab has completed the previous process when the first-stage rolling of the first slab is completed, transferring the first slab to a far-point track behind a machine for waiting for temperature;
performing first-stage rolling on the second slab, and if the first-stage rolling of the second slab is completed and the previous working procedure of the third slab is completed, transferring the second slab to a near-point track behind the machine for waiting for temperature;
the two-block chain circulation rolling step is then repeated.
In an alternative embodiment, if the N-2 th slab is passed through the rolling mill from the near-point track before the machine to the far-point roller way after the machine continues to be warmed, the N-1 th slab is passed through the rolling mill from the far-point track before the machine to the near-point roller way after the machine continues to be warmed, the N-1 th slab is passed through the rolling mill from the near-point roller way before the machine continues to be warmed, the N-2 th slab is returned to the rolling mill for second-stage rolling, and the rolling procedure is left from the rolling mill after the second-stage rolling of the N-2 th slab is completed.
In an alternative embodiment, if the N-th slab has completed the previous process after the second stage rolling of the N-2 th slab is completed, the N-th slab is subjected to the first stage rolling, the N-th slab is transferred to the far point track in front of the machine for waiting for temperature after the first stage rolling of the N-th slab is completed, the N-1 th slab is emptied from the rolling mill to the near point roller way in front of the machine for continuing waiting for temperature, and then the two chain type circulating rolling steps are repeated.
In an alternative embodiment, if the second stage rolling of the N-2 th slab is completed and the N-1 th slab has not completed the previous process, the N-1 th slab is returned to the rolling mill for the second stage rolling, and the second stage rolling of the N-1 th slab is completed and leaves the rolling process from the post rolling table of the rolling mill.
In the rolling process of the medium steel plate, when the prior slab is to be warmed and the subsequent slab is not to be warmed, the prior slab can be rolled for the second time, and the adjustment can be flexibly performed according to the condition of the incoming steel slab.
In an alternative embodiment, air cooling or natural cooling is adopted to control the temperature in the temperature waiting process, the temperature of each position of the intermediate billet before the intermediate billet is rolled in the second stage in the embodiment is shown in fig. 3, according to fig. 3, a curve in an inverted U shape shows the temperature of the intermediate billet from left to right, the temperature difference of the head and the tail of the intermediate billet is within 20 ℃ as seen in the figure, and the temperature difference is relatively small.
In an alternative embodiment, the rolling mill is free of side-to-temperature roller ways both in front and back.
Comparative example:
the comparative example provides a medium steel plate temperature control rolling method, comprising the following steps: the first plate blank is heated after finishing the first-stage rolling, then the second plate blank is heated before finishing the first-stage rolling, then the second-stage rolling of the first plate is carried out, the first plate blank leaves the roller way after finishing the second-stage rolling, then the second plate blank is conveyed to the machine through the rolling mill to continue heating, at this time, the first-stage rolling of the third plate blank is carried out, the first-stage heating of the third plate blank is carried out after finishing the first-stage rolling, the second-stage rolling of the second plate blank is carried out until the second plate blank leaves the roller way after finishing, the rolling plate is controlled to pass back, and the like, so as to form a chain rolling mode.
Compared with the single-block controlled rolling and the two-block controlled rolling, the rolling efficiency of the medium steel plate temperature control rolling method provided by the comparative example is obviously improved when rolling the controlled rolling plate with the thickness smaller than 40mm, but the temperature waiting time of the intermediate blank of the steel plate with the thickness larger than 40mm is long, and the temperature waiting time is a control step of the rolling efficiency, so that the efficiency is not improved.
In this comparative example, in order to shorten the waiting time, the intermediate billet can be cooled by a cooling system to improve the rolling efficiency, but the following problems exist in using the cooling system for cooling:
1. when the intermediate billet adopts air cooling, the air cooling temperature drop speed is small, the time for waiting for the intermediate billet to be heated is shortened obviously, and the rolling efficiency is improved obviously.
2. The intermediate billet is rapidly cooled by a pre-machine intermediate cooling system or a post-machine ultra-fast cooling system so as to achieve the purpose of controlling the rolling temperature of the second stage, namely finish rolling, but is limited by a system model, the intermediate billet cooling procedure is mainly carried out by an operator according to experience to randomly water-cool the intermediate billet, most of the intermediate billet after water cooling has uneven temperature, and part of the intermediate billet also has the conditions of head-tail buckling, thereby affecting the rolling in the finish rolling stage, even causing the rolling waste of a steel plate when serious, and leading to low use proportion.
In the comparative example, the temperatures at the positions before the intermediate billet is subjected to the second stage rolling by adopting water cooling are shown in fig. 4, the temperature of the intermediate billet from the beginning to the end is shown in an inverted U-shaped curve from left to right according to fig. 4, and the temperature difference between the beginning and the end of the intermediate billet is about 50 ℃ and is relatively large compared with the embodiment.
According to the method, the medium plate is rolled by the method, the number of the hour blocks of the thick standard plate is increased from 7.5 blocks/hour to 10 blocks/hour in the comparative example, the transverse rolling efficiency is increased by more than 30%, the barrier with low temperature waiting efficiency of the medium blank of the thick standard transverse rolling plate is broken, the new breakthrough of the rolling efficiency is realized, the production cost is further reduced, and the market competitiveness of the plate product is enhanced.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. The medium steel plate temperature control rolling method is characterized by comprising the following steps of:
two chain type circulating rolling, namely, the N-2 plate blanks which finish the first-stage rolling pass through a rolling mill from a near-point track in front of the rolling mill to a far-point roller way behind the rolling mill continuously to be warmed, the N-1 plate blanks which finish the first-stage rolling pass through the rolling mill from a far-point track in front of the rolling mill to a near-point roller way behind the rolling mill continuously to be warmed, if the N plate blanks finish the previous working procedure at the moment, the N plate blanks are subjected to the first-stage rolling, the N plate blanks are transferred to the far-point track in front of the rolling mill to be warmed after the first-stage rolling of the N plate blanks is finished, the N-1 plate blanks pass through the rolling mill to the near-point roller way in front of the rolling mill continuously to be warmed, the N-2 plate blanks are returned to the rolling mill to be subjected to the second-stage rolling, and the N-2 plate blanks leave the rolling working procedure from the roller way behind the rolling mill after the second-stage rolling of the rolling mill is finished;
wherein N is more than or equal to 3, N is a positive integer, the distance between the rear far point track and the rolling mill is larger than the distance between the rear near point track and the rolling mill, and the distance between the front far point track and the rolling mill is larger than the distance between the front near point track and the rolling mill.
2. The method for temperature-controlled rolling of medium steel sheet according to claim 1, wherein the thickness of the medium steel sheet is greater than 40mm.
3. The method for temperature-controlled rolling of a medium steel sheet according to claim 1, further comprising the steps of, before rolling the nth slab:
performing first-stage rolling on the first slab, and if the second slab has completed the previous process when the first-stage rolling of the first slab is completed, transferring the first slab to a far-point track behind a machine for waiting for temperature;
performing first-stage rolling on the second slab, and if the first-stage rolling of the second slab is completed and the previous working procedure of the third slab is completed, transferring the second slab to a near-point track behind the machine for waiting for temperature;
the two-block chain circulation rolling step is then repeated.
4. The method according to claim 1, wherein if the N-2 th slab is continuously warmed from the front near point rail to the rear far point rail, the N-1 th slab is continuously warmed from the front far point rail to the rear near point rail, the N-1 th slab is continuously warmed from the rear roller to the front near point rail, the N-1 th slab is continuously warmed from the front near point rail, the N-2 th slab is returned to the rolling mill for the second stage rolling, and the N-2 th slab leaves the rolling process from the rear roller after the second stage rolling is completed.
5. The method according to claim 4, wherein if the N-th slab has completed the previous process after the second-stage rolling of the N-2 th slab is completed, the N-th slab is subjected to the first-stage rolling, the N-th slab is transferred to the upstream-point rail for temperature after the first-stage rolling of the N-th slab is completed, the N-1-th slab is emptied through the rolling mill to the upstream-point roller for continuous temperature, and then the two chain-type circulating rolling steps are repeated.
6. The method according to claim 4, wherein if the N-1 th slab has not completed the previous step after the second-stage rolling of the N-2 th slab is completed, the N-1 th slab is returned to the rolling mill to perform the second-stage rolling, and the N-1 th slab leaves the rolling step from the post-rolling mill roll table after the second-stage rolling of the N-1 th slab is completed.
7. The method for temperature-controlled rolling of medium steel plates according to claim 1, wherein air cooling or natural cooling is adopted for temperature control in the temperature-waiting process.
8. The method for temperature-controlled rolling of a medium steel plate according to claim 1, wherein the rolling mill has no side roller tables for temperature treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310778321.3A CN116748296A (en) | 2023-06-28 | 2023-06-28 | Temperature-control rolling method for medium-thickness steel plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310778321.3A CN116748296A (en) | 2023-06-28 | 2023-06-28 | Temperature-control rolling method for medium-thickness steel plate |
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| Publication Number | Publication Date |
|---|---|
| CN116748296A true CN116748296A (en) | 2023-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310778321.3A Pending CN116748296A (en) | 2023-06-28 | 2023-06-28 | Temperature-control rolling method for medium-thickness steel plate |
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- 2023-06-28 CN CN202310778321.3A patent/CN116748296A/en active Pending
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