CN111112346A - Control method for pipeline steel finish rolling tapping warped head - Google Patents
Control method for pipeline steel finish rolling tapping warped head Download PDFInfo
- Publication number
- CN111112346A CN111112346A CN201911382787.1A CN201911382787A CN111112346A CN 111112346 A CN111112346 A CN 111112346A CN 201911382787 A CN201911382787 A CN 201911382787A CN 111112346 A CN111112346 A CN 111112346A
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- CN
- China
- Prior art keywords
- pipeline steel
- tapping
- temperature
- controlling
- rolling
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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
- B21B37/72—Rear end control; Front end control
-
- 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
-
- 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
- B21B37/58—Roll-force control; Roll-gap control
-
- 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
- B21B37/68—Camber or steering control for strip, sheets or plates, e.g. preventing meandering
-
- 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
Abstract
The invention provides a method for controlling a tapping and warping head of a pipeline steel in a finish rolling process, which comprises a heating control process of controlling the temperature of a first side of a pipeline steel slab in the tapping and warping direction to be higher than the temperature of a second side opposite to the first side when the pipeline steel is tapped and warped in the finish rolling process; and a rolling control step of adjusting the relative reduction rate of the pipeline steel slab to control the reverse deformation of the pipeline steel slab in the buckling and warping direction. When the pipeline steel plate blank is rolled to generate the knocking and tilting head, the first side and the second side of the surface of the pipeline steel plate blank are controlled to form rolling temperature difference, so that the temperature of the first side in the knocking and tilting direction is higher than that of the second side, and the pipeline steel plate blank forms deformation resistance pressure difference on the upper surface side and the lower surface side due to inconsistent temperature difference on the upper surface side and the lower surface side, so that the knocking and tilting condition is adjusted. Meanwhile, the relative reduction rate of the pipeline steel plate blank is controlled, so that the roller provides rolling pressure for the reverse deformation in the direction of the tapping and tilting of the roller, the generation of the tapping and tilting is reduced, and the preparation quality of the pipeline steel is ensured.
Description
Technical Field
The invention relates to the technical field of pipeline steel, in particular to a control method for fine rolling, tapping and warping of pipeline steel.
Background
The pipeline steel is a steel plate for pipelines, is mainly used for processing and manufacturing oil and gas pipelines, and in the using process, in addition to high pressure resistance, the pipeline steel also needs high low-temperature toughness and excellent welding performance.
The pipeline steel mainly plays a role in bearing the transportation of petroleum and natural gas after being changed into a steel pipe through spiral submerged arc welding or longitudinal submerged arc welding, and with the promotion of national key projects such as western gas east transportation and chuanqi east transportation, the demand for the pipeline steel is increasing day by day, particularly high-grade pipeline steel represented by X80, X80 is the American type classification of high-strength pipeline steel, and the minimum yield value (MPa) of the pipeline steel is 551. The X80 pipeline steel has extremely high requirements on comprehensive properties such as strength, hardness, impact toughness and the like, and particularly, the development of the extremely thick pipeline steel X80 puts higher requirements on a hot rolling process. Due to various external factors, the buckling of the head of the pipeline steel is not easy to control in the finish rolling process, accidents such as steel piling and steel clamping are easily caused, long-time shutdown, equipment damage and the like are caused, and various indexes such as the operation rate and the production cost are seriously influenced.
Therefore, how to control the buckling of the steel head of the pipeline is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of this, the invention provides a method for controlling a tapping and tilting head in finish rolling of pipeline steel, so as to control the tapping and tilting of the head of the pipeline steel.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for controlling a tapping and warping head in the finish rolling of pipeline steel comprises a heating control procedure of controlling the temperature of a first side of a pipeline steel slab in the tapping and warping direction to be higher than the temperature of a second side opposite to the first side when the tapping and warping head appears on the pipeline steel slab in the finish rolling procedure of the pipeline steel slab;
and adjusting the relative reduction rate of the pipeline steel plate blank to control the reverse deformation of the pipeline steel plate blank towards the buckling direction.
Preferably, in the method for controlling the line steel finish rolling and cocking head, the heating control step includes adjusting the temperature of the first side of the line steel slab in the plate surface cocking direction to be higher than the temperature of the second side by 8 to 18 ℃.
Preferably, in the method for controlling the line steel finish rolling and cocking, the temperature difference between the first side temperature and the second side temperature of the line steel slab is controlled to be 10 ℃ to 15 ℃.
Preferably, in the above method for controlling the tapping nose for finish rolling of the linepipe steel, the heating control process includes adjusting the temperature of the first side of the linepipe steel slab to be increased by 5 ℃ to 8 ℃, and adjusting the temperature of the second side of the linepipe steel slab to be decreased by 5 ℃ to 8 ℃.
Preferably, in the above method for controlling a tapping nose for finish rolling of a linepipe steel, the manner of raising the temperature of the first side of the linepipe steel slab includes turning off a strip fall prevention water of the rolling mill on the first side when the linepipe steel slab is produced.
Preferably, in the above method for controlling tapping heads in finish rolling of linepipe steel, the rolling control step includes adjusting a relative reduction ratio of a tapping stand that rolls the linepipe steel slab.
Preferably, in the method for controlling the line steel finish rolling cocking, the relative reduction rate is adjusted to be ± 1% to 2% of the relative reduction rate of the cocking frame in which the line steel slab cocking occurs.
Preferably, in the above method for controlling tapping and raising of finish rolling of linepipe steel, the rolling control step includes adjusting a roll bending force during rolling of the linepipe steel slab.
Preferably, in the method for controlling the fine rolling and tapping nose of the pipeline steel, the rolling control process includes adjusting roll shifting parameters of the pipeline steel slab to control the shape of the pipeline steel slab to be in a straight state and a slightly double-wave state.
The invention provides a method for controlling a pipeline steel finish rolling and cocking head, which comprises a heating control procedure of controlling the temperature of a first side of a pipeline steel slab in a plate surface cocking direction to be higher than the temperature of a second side opposite to the first side when the pipeline steel slab generates the cocking head in a pipeline steel slab finish rolling procedure; and a rolling control step of adjusting the relative reduction rate of the pipeline steel slab to control the reverse deformation of the pipeline steel slab in the direction of the tapping and warping head. When the pipeline steel plate blank is rolled to generate the buckling head, the first side and the second side of the plate surface of the pipeline steel plate blank are controlled to form rolling temperature difference, so that the pipeline steel plate blank is in the buckling direction, namely the deformation direction of the head of the pipeline steel plate blank, the temperature of the first side is higher than that of the second side, the pipeline steel plate blank is inconsistent in temperature difference between the upper surface side and the lower surface side, deformation resistance pressure difference between the upper surface side and the lower surface side is formed, and the buckling head buckling condition is adjusted. Meanwhile, the relative reduction rate of the pipeline steel plate blank is controlled, so that the roller provides rolling pressure for the reverse deformation in the direction of the tapping and tilting of the roller, the generation of the tapping and tilting is reduced, and the preparation quality of the pipeline steel is ensured.
Detailed Description
The invention discloses a control method for a pipeline steel finish rolling and cocking head, which realizes the control of the tapping and cocking of the pipeline steel head.
The technical solutions in the embodiments of the present invention are described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment provides a method for controlling a tapping and warping head in a pipeline steel finish rolling process, which comprises a heating control process of controlling the temperature of a first side of a pipeline steel slab surface in the tapping and warping direction to be higher than the temperature of a second side opposite to the first side when the tapping and warping head appears on the pipeline steel slab in the pipeline steel slab finish rolling process; and a rolling control step of adjusting the relative reduction rate of the pipeline steel slab to control the reverse deformation of the pipeline steel slab in the direction of the tapping and warping head. When the pipeline steel plate blank is rolled to produce and kowtows the wane head, the first side and the second side of control pipeline steel plate blank face form rolling temperature difference, make its first side temperature of kowtowing the direction of upwarping be higher than its second side temperature, specifically, kowtowing the direction of upwarping be the direction that pipeline steel plate blank head warp, when pipeline steel plate blank head perk, kowtowing the uping direction upwards, the upper surface temperature that needs to adjust the pipeline steel plate blank is higher than lower surface temperature, when the head of pipeline steel plate blank is kowtowing downwards, kowtowing the direction of upwarping downwards, the lower surface temperature that needs to adjust the pipeline steel plate blank is higher than upper surface temperature, thereby make the pipeline steel plate blank because the difference in temperature of upper and lower surface is inconsistent, form the upper and lower surface side deformation pressure difference, adjust the kowt. Meanwhile, the relative reduction rate of the pipeline steel plate blank is controlled, so that the roller provides rolling pressure for the reverse deformation in the direction of the tapping and tilting of the roller, the generation of the tapping and tilting is reduced, and the preparation quality of the pipeline steel is ensured.
In one embodiment of the present disclosure, the heating control process includes adjusting the temperature of the first side of the pipeline steel slab in the buckling direction to be higher than the temperature of the second side by 8-18 ℃. Preferably, the temperature difference between the temperature of the first side and the temperature of the second side is controlled to be 10-15 ℃.
In the specific control process, the heating control procedure comprises the steps of adjusting the temperature of the first side of the pipeline steel plate blank to be increased by 5-8 ℃, and adjusting the temperature of the second side of the pipeline steel plate blank to be decreased by 5-8 ℃. Therefore, the temperature difference is generated between the first side and the second side of the pipeline steel plate blank, the temperature difference is controlled to be 10-15 ℃, the deformation resistance of the first side is lower than that of the second side, the reverse deformation is carried out in the direction of the knocking and tilting, the active control on the knocking and tilting head is realized, and the quality of the pipeline steel plate blank is improved.
In one embodiment of the present disclosure, the raising the temperature of the first side of the pipeline steel slab comprises turning off the strip-fall prevention device located on the first side of the rolling mill during rolling of the pipeline steel slab. The anti-stripping falling water is sprayed on the surface of the pipeline steel plate blank, high-temperature bonding between the pipeline steel plate blank and the roller is avoided, when the pipeline steel plate blank is knocked to tilt, the anti-stripping water on the first side in the knocking and tilting direction can be actively controlled to be closed, the temperature of the first side of the pipeline steel plate blank is actively improved, and the surface temperature of the pipeline steel plate blank is actively controlled.
In one embodiment of the present disclosure, the rolling control process includes adjusting the relative reduction of the cocking stand of the rolled pipeline steel slab. In the process of rolling the pipeline steel plate blank, the rolling state of the pipeline steel plate blank is observed, when the head is knocked, the relative rolling reduction rate of the knocking and tilting rack is finely adjusted, and the strip steel is knocked and tilted by utilizing rolling load.
Preferably, the relative reduction rate is adjusted to correct the relative reduction rate of the rapping frame, at which the pipe line steel slab is rapped and warped, by 1% to 2%.
In one embodiment of the present disclosure, the rolling control process includes adjusting a roll bending force during rolling of the pipeline steel slab. And adjusting the roll shifting parameter of the pipeline steel plate blank to control the plate shape of the pipeline steel plate blank to be in a straight state and a slightly double-wave state. The middle wave is an important factor causing the knocking and warping, the middle wave is that the middle part of the pipeline steel plate blank generates a wave-shaped structure when the pipeline steel plate blank is rolled, the middle wave of the strip steel is calculated and observed in the process of rolling the pipeline steel plate blank, and the bending roll force is reduced through a rolling model to avoid the strip steel from generating the middle wave. Meanwhile, the parameter of the roller shifting amount is controlled, so that the plate shape of the pipeline steel plate blank is in a straight and slightly double-wave state, and the condition of head knocking and tilting caused by large fluctuation of the roller shifting is avoided.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The method for controlling the tapping and warping head in the pipeline steel finish rolling is characterized by comprising a heating control procedure of controlling the temperature of a first side of the pipeline steel slab in the tapping and warping direction to be higher than the temperature of a second side opposite to the first side when the pipeline steel slab is tapped and warped in the finish rolling procedure;
and adjusting the relative reduction rate of the pipeline steel plate blank to control the reverse deformation of the pipeline steel plate blank towards the buckling direction.
2. The method for controlling a tapping head for finish rolling of a line steel according to claim 1, wherein the heating control step comprises adjusting the temperature of the first side of the slab of the line steel in the tapping direction to be higher than the temperature of the second side by 8 ℃ to 18 ℃.
3. The method for controlling line steel finish rolling tapping heads according to claim 2, wherein the temperature difference between the first side temperature and the second side temperature of the line steel slab is controlled to be 10 ℃ to 15 ℃.
4. The method for controlling fine rolling tapping heads of pipeline steel according to claim 3, wherein the heating control process comprises adjusting the temperature of the first side of the pipeline steel slab to be increased by 5 ℃ to 8 ℃ and adjusting the temperature of the second side of the pipeline steel slab to be decreased by 5 ℃ to 8 ℃.
5. The method for controlling a line steel finish rolling rapping head as recited in claim 4, wherein the manner of raising the temperature of the first side of the line steel slab comprises shutting down a mill to strip-proof water falling on the first side when producing the line steel slab.
6. The method for controlling tapping heads in finish rolling of linepipe steel according to claim 1, wherein the rolling control process comprises adjusting a relative reduction ratio of a tapping stand that rolls the linepipe steel slab.
7. The method for controlling a tapping head for finish rolling of a linepipe steel according to claim 6, wherein the relative reduction ratio is adjusted to correct ± 1% to 2% of the relative reduction ratio of the tapping frame where the tapping head of the linepipe steel slab occurs.
8. The method for controlling tapping and raising of finish rolling of linepipe steel according to claim 1, wherein the rolling control process comprises adjusting a roll bending force during rolling of the linepipe steel slab.
9. The method for controlling the pipeline steel finish rolling tapping nose as claimed in claim 1, wherein the rolling control procedure comprises adjusting roll shifting parameters of the pipeline steel slab to control the shape of the pipeline steel slab to be in a straight state and a slightly double-wave state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911382787.1A CN111112346A (en) | 2019-12-27 | 2019-12-27 | Control method for pipeline steel finish rolling tapping warped head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911382787.1A CN111112346A (en) | 2019-12-27 | 2019-12-27 | Control method for pipeline steel finish rolling tapping warped head |
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| Publication Number | Publication Date |
|---|---|
| CN111112346A true CN111112346A (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911382787.1A Pending CN111112346A (en) | 2019-12-27 | 2019-12-27 | Control method for pipeline steel finish rolling tapping warped head |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643288A (en) * | 2022-03-25 | 2022-06-21 | 安阳钢铁股份有限公司 | Method for improving rolling warping of low-temperature non-oriented silicon steel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09234503A (en) * | 1996-02-29 | 1997-09-09 | Kawasaki Steel Corp | Method for rolling metallic strip |
| JP2008161883A (en) * | 2006-12-27 | 2008-07-17 | Jfe Steel Kk | Warp control method of thick steel plate |
| CN104998927A (en) * | 2015-07-10 | 2015-10-28 | 南京钢铁股份有限公司 | Thick standard hot rolling nose plate thermal straightening process |
| CN108838216A (en) * | 2018-06-29 | 2018-11-20 | 首钢京唐钢铁联合有限责任公司 | A kind of control method of slab nose |
| CN110538882A (en) * | 2019-09-05 | 2019-12-06 | 首钢京唐钢铁联合有限责任公司 | Method and device for restraining warping of strip steel and strip steel finish rolling equipment |
-
2019
- 2019-12-27 CN CN201911382787.1A patent/CN111112346A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09234503A (en) * | 1996-02-29 | 1997-09-09 | Kawasaki Steel Corp | Method for rolling metallic strip |
| JP2008161883A (en) * | 2006-12-27 | 2008-07-17 | Jfe Steel Kk | Warp control method of thick steel plate |
| CN104998927A (en) * | 2015-07-10 | 2015-10-28 | 南京钢铁股份有限公司 | Thick standard hot rolling nose plate thermal straightening process |
| CN108838216A (en) * | 2018-06-29 | 2018-11-20 | 首钢京唐钢铁联合有限责任公司 | A kind of control method of slab nose |
| CN110538882A (en) * | 2019-09-05 | 2019-12-06 | 首钢京唐钢铁联合有限责任公司 | Method and device for restraining warping of strip steel and strip steel finish rolling equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643288A (en) * | 2022-03-25 | 2022-06-21 | 安阳钢铁股份有限公司 | Method for improving rolling warping of low-temperature non-oriented silicon steel |
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Application publication date: 20200508 |