CN112620357A - Rolling control method of 4-time length pipeline steel - Google Patents
Rolling control method of 4-time length pipeline steel Download PDFInfo
- Publication number
- CN112620357A CN112620357A CN202011396166.1A CN202011396166A CN112620357A CN 112620357 A CN112620357 A CN 112620357A CN 202011396166 A CN202011396166 A CN 202011396166A CN 112620357 A CN112620357 A CN 112620357A
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- Prior art keywords
- speed
- rolling
- steel
- acc
- steel plate
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Classifications
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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
- B21B37/74—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
- 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
- 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
- B21B15/0007—Cutting or shearing the product
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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
- B21B37/46—Roll speed or drive motor control
-
- 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
-
- 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
- B21B45/02—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 for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
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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
- B21B2015/0071—Levelling the rolled product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a rolling control method of 4-time length pipeline steel, relating to the field of pipeline steel rolling, and the invention (1) adjusts the plate combination mode to realize 4-time length plate combination, and the technological process is as follows: heating → TMCP rolling → cooling → straightening with warm straightening → shearing for finishing; (2) the signal is rectified to the amendment heat, and the speed is not slowed down when the steel sheet comes, and the speed is rectified with steel sheet and ACC roll table speed to heat, and the steel sheet normally passes through, and the ACC export is rectified to heat and is shortened length and be less than steel sheet length, and the steel sheet slows down before the heat is rectified, and the steel sheet afterbody can stop at the ACC, and the type number shielding is rectified to the heat, changes the roll table into and passes through. (3) Modifying the speed of the roller way after the thermal correction, and synchronizing the speeds of the steel plate and the ACC roller way; (4) the speed of the rolling and ACC cooling roller ways is increased, and the problem of large performance difference caused by overlong steel plates and large head-tail temperature difference in the rolling process and the cooling process is solved. 4-time-length rolling is adopted for tapping and closing, after tapping and closing are successful, 4-time-length rolling can be realized in subsequent pipeline steel production, and the yield of the pipeline steel can be expected to be improved by 33%.
Description
Technical Field
The invention relates to the field of pipeline steel rolling, in particular to a rolling control method of 4-time length pipeline steel.
Background
The pipeline steel is the most economical transportation mode for long-distance petroleum transportation, the safety requirements such as the strength of the pipeline steel developing to high strength and large caliber are more outstanding, and the pipeline steel has the performances such as high strength, high toughness, brittle fracture resistance and the like.
Due to strict process requirements, the rolling control temperature is low, the rolling control time is long, the rolling yield is low all the time, the difficulty in improving the yield of other plates is high, and at present, due to technical reasons, the pipeline steel produced in a wide and thick plate workshop passes through a clearance, and 3-time plate rolling is realized at most.
Disclosure of Invention
The invention aims to: in order to solve various technical problems of 4-time pipeline steel, the rolling control method of the 4-time pipeline steel is provided.
In order to achieve the purpose, the invention provides the following technical scheme: a rolling control method of 4-time length pipeline steel adopts the following scheme:
step (1): the plate combination mode is adjusted to realize 4-time plate combination, and the process flow is as follows: heating → TMCP rolling → cooling → straightening with warm straightening → shearing for finishing;
step (2): modifying a thermal correction signal, wherein the speed of the steel plate is not reduced when the steel plate comes, the thermal correction speed is the same as the speed of the steel plate and an ACC roller way, the steel plate normally passes through, the length of the steel plate from the exit of the ACC to the thermal correction is smaller than the length of the steel plate, the steel plate is decelerated before the thermal correction, the tail of the steel plate stops at the ACC, the thermal correction type number is shielded, and the roller way is changed;
and (3): modifying the speed of the roller way after the thermal correction, and synchronizing the speeds of the steel plate and the ACC roller way;
and (4): the speed of the rolling and ACC cooling roller ways is increased, and the problem of large performance difference caused by overlong steel plates and large head-tail temperature difference in the rolling process and the cooling process is solved.
Preferably, the roller speed in the step (4) is increased to 2.2-2.5 m/s.
Preferably, in the step (4), the plate body is cooled to 450-550 ℃ at a cooling rate of 30-80 ℃/s.
Compared with the prior art, the invention has the beneficial effects that: : according to the invention, the pipeline steel is divided into 4-time plates, because the length from the ACC outlet to the hot straightening is smaller than that of the steel plate, the steel plate is decelerated before the hot straightening, the tail part of the steel plate stops at the ACC, the hot straightening model is shielded, and the roller way is changed into a roller way passing through; the method has the advantages that the speed of the roller way after thermal correction is changed to be synchronous with the speed of the roller way before thermal correction, the ACC cooling speed is increased to 2.2-2.5m/s in the process, the performance difference caused by 4-time plate combination, overlong steel plate length and head-tail temperature difference is reduced, and the normal rolling of 4-time plate combination pipeline steel can be realized.
Detailed Description
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The following describes an embodiment of the present invention based on its overall structure.
The first embodiment is as follows:
a rolling control method of 4-time length pipeline steel adopts the following scheme:
step (1): the plate combination mode is adjusted to realize 4-time plate combination, and the process flow is as follows: heating → TMCP rolling → cooling → straightening with warm straightening → shearing for finishing;
step (2): modifying a thermal correction signal, wherein the speed of the steel plate is not reduced when the steel plate comes, the thermal correction speed is the same as the speed of the steel plate and an ACC roller way, the steel plate normally passes through, the length of the steel plate from the exit of the ACC to the thermal correction is smaller than the length of the steel plate, the steel plate is decelerated before the thermal correction, the tail of the steel plate stops at the ACC, the thermal correction type number is shielded, and the roller way is changed;
and (3): modifying the speed of the roller way after the thermal correction, and synchronizing the speeds of the steel plate and the ACC roller way;
and (4): the speed of the rolling and ACC cooling roller ways is increased, and the problem of large performance difference caused by overlong steel plates and large head-tail temperature difference in the rolling process and the cooling process is solved.
The speed of the roller way in the step (4) is increased to 2.2-2.5 m/s.
According to the invention, performance differences caused by overlong steel plate length and head-tail temperature difference due to 4-time plate assembly are reduced through the steps.
And (4) cooling the plate body to 450-550 ℃ at a cooling speed of 30-80 ℃/s.
According to the invention, if the cooling temperature of the pipeline steel is higher than 550 ℃, part of proeutectoid ferrite and pearlite structures exist in the structure, and uniform ferrite and local dispersion distribution martensite-austenite structures cannot be finally obtained, so that the pipeline steel is low in strength; if the temperature at which the line steel is cooled is below 450 c, it does not provide sufficient time for the subsequent air cooling and final laminar cooling steps, does not result in uniform ferrite and localized dispersion martensite-austenite structures, and is not conducive to final strip coiling.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (3)
1. A rolling control method of 4-time length pipeline steel adopts the following scheme:
step (1): the plate combination mode is adjusted to realize 4-time plate combination, and the process flow is as follows: heating → TMCP rolling → cooling → straightening with warm straightening → shearing for finishing;
step (2): modifying a thermal correction signal, wherein the speed of the steel plate is not reduced when the steel plate comes, the thermal correction speed is the same as the speed of the steel plate and an ACC roller way, the steel plate normally passes through, the length of the steel plate from the exit of the ACC to the thermal correction is smaller than the length of the steel plate, the steel plate is decelerated before the thermal correction, the tail of the steel plate stops at the ACC, the thermal correction type number is shielded, and the roller way is changed;
and (3): modifying the speed of the roller way after the thermal correction, and synchronizing the speeds of the steel plate and the ACC roller way;
and (4): the speed of the rolling and ACC cooling roller ways is increased, and the problem of large performance difference caused by overlong steel plates and large head-tail temperature difference in the rolling process and the cooling process is solved.
2. The rolling control method of 4 times length pipeline steel according to claim 1, characterized in that: the speed of the roller way in the step (4) is increased to 2.2-2.5 m/s.
3. The rolling control method of 4 times length pipeline steel according to claim 1, characterized in that: and (4) cooling the plate body to 450-550 ℃ at a cooling speed of 30-80 ℃/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011396166.1A CN112620357A (en) | 2020-12-03 | 2020-12-03 | Rolling control method of 4-time length pipeline steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011396166.1A CN112620357A (en) | 2020-12-03 | 2020-12-03 | Rolling control method of 4-time length pipeline steel |
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| Publication Number | Publication Date |
|---|---|
| CN112620357A true CN112620357A (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011396166.1A Pending CN112620357A (en) | 2020-12-03 | 2020-12-03 | Rolling control method of 4-time length pipeline steel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113621763A (en) * | 2021-07-01 | 2021-11-09 | 张家港宏昌钢板有限公司 | Method for improving strength of pipeline steel through self tempering |
| CN114178414A (en) * | 2021-11-16 | 2022-03-15 | 山东钢铁集团日照有限公司 | Method for improving flatness of X70M pipeline steel plate through secondary straightening |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6216809A (en) * | 1985-07-12 | 1987-01-26 | Sumitomo Metal Ind Ltd | Outside diameter control method for seamless pipe |
| DE3725886A1 (en) * | 1987-03-13 | 1988-09-22 | Thaelmann Schwermaschbau Veb | Method for the continuous production of finished lengths of bar steel |
| CN103752626A (en) * | 2013-12-30 | 2014-04-30 | 秦皇岛首秦金属材料有限公司 | Producing method for improving steel plate surface quality by utilizing ACC semi-automatic water cooling |
| CN110284077A (en) * | 2019-07-24 | 2019-09-27 | 宝钢湛江钢铁有限公司 | A kind of manufacturing method of thin gauge high tenacity pipe line steel |
| CN111036703A (en) * | 2019-10-28 | 2020-04-21 | 鞍钢股份有限公司 | Method for producing TC4 titanium alloy wide and thick plate by adopting direct rolling process |
| CN111097800A (en) * | 2020-03-02 | 2020-05-05 | 辽宁天丰特殊工具制造股份有限公司 | Short-process MPM production system and method for small-caliber steel pipes |
| CN111842546A (en) * | 2020-07-10 | 2020-10-30 | 首钢集团有限公司 | Equipment and method for improving TMCP wide and thick plate secondary plate shape |
-
2020
- 2020-12-03 CN CN202011396166.1A patent/CN112620357A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6216809A (en) * | 1985-07-12 | 1987-01-26 | Sumitomo Metal Ind Ltd | Outside diameter control method for seamless pipe |
| DE3725886A1 (en) * | 1987-03-13 | 1988-09-22 | Thaelmann Schwermaschbau Veb | Method for the continuous production of finished lengths of bar steel |
| CN103752626A (en) * | 2013-12-30 | 2014-04-30 | 秦皇岛首秦金属材料有限公司 | Producing method for improving steel plate surface quality by utilizing ACC semi-automatic water cooling |
| CN110284077A (en) * | 2019-07-24 | 2019-09-27 | 宝钢湛江钢铁有限公司 | A kind of manufacturing method of thin gauge high tenacity pipe line steel |
| CN111036703A (en) * | 2019-10-28 | 2020-04-21 | 鞍钢股份有限公司 | Method for producing TC4 titanium alloy wide and thick plate by adopting direct rolling process |
| CN111097800A (en) * | 2020-03-02 | 2020-05-05 | 辽宁天丰特殊工具制造股份有限公司 | Short-process MPM production system and method for small-caliber steel pipes |
| CN111842546A (en) * | 2020-07-10 | 2020-10-30 | 首钢集团有限公司 | Equipment and method for improving TMCP wide and thick plate secondary plate shape |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113621763A (en) * | 2021-07-01 | 2021-11-09 | 张家港宏昌钢板有限公司 | Method for improving strength of pipeline steel through self tempering |
| CN114178414A (en) * | 2021-11-16 | 2022-03-15 | 山东钢铁集团日照有限公司 | Method for improving flatness of X70M pipeline steel plate through secondary straightening |
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Application publication date: 20210409 |
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