CN107828951A - A kind of method and device for manufacturing cold rolling high-strength steel - Google Patents

A kind of method and device for manufacturing cold rolling high-strength steel Download PDF

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Publication number
CN107828951A
CN107828951A CN201710957654.7A CN201710957654A CN107828951A CN 107828951 A CN107828951 A CN 107828951A CN 201710957654 A CN201710957654 A CN 201710957654A CN 107828951 A CN107828951 A CN 107828951A
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China
Prior art keywords
control
cooling
finish rolling
plate slab
band plate
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CN201710957654.7A
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CN107828951B (en
Inventor
徐芳
夏银锋
秦红波
李恺
李东宁
谢光远
胡亮
刘鸿明
王智锋
文杰
林海海
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Shougang Group Co Ltd
Shougang Jingtang United Iron and Steel Co Ltd
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Shougang Group Co Ltd
Shougang Jingtang United Iron and Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

The embodiments of the invention provide a kind of method and device for manufacturing cold rolling high-strength steel, method includes：Band plate slab is heated, it is 1180~1200 DEG C to control heating tapping temperature, and it is 180~200min to control the heat time；Roughing is carried out to the band plate slab after heating, it is 980~1000 DEG C to control roughing temperature；Finish rolling is carried out to the band plate slab after roughing, it is 860~880 DEG C to control finish rolling finishing temperature；Section cooling is carried out to the band plate slab after finish rolling, in laminar cooling process, it is opening to control main cold-zone domain cooling manifold, and it is closed mode to control feedback areas cooling manifold；So, it is opening that main cold-zone domain cooling manifold is controlled in laminar cooling process, feedback areas cooling manifold is closed mode, it can avoid because of abnormal feedback regulation caused by temperature fluctuation, and then improve the control accuracy of Strip Steel Coiling Temperature, avoid coiling temperature big ups and downs, it is ensured that the stability of subsequent handling cold rolling.

Description

A kind of method and device for manufacturing cold rolling high-strength steel
Technical field
The invention belongs to technical field of steel production, more particularly to a kind of method and device for manufacturing cold rolling high-strength steel.
Background technology
In technical field of steel production, silicon is the common element for improving hardenability of steel, improving product intensity, cold at present Roll to design based on dual phase steel, TRIP steel in high-strength steel and contain high level silicon composition, but the addition of silicon composition causes strip Surface red rust defect is serious, final to influence client's use.Require to perform what low temperature batched to solve the problems, such as surface red rust, in production Process system, but the elongated strip shape quality of water cooled rear strip is poor, and coiling temperature fluctuation is violent, and temperature error is batched with target It is too big, influence the stability of subsequent handling cold rolling.
The content of the invention
The problem of existing for prior art, the embodiments of the invention provide a kind of method and dress for manufacturing cold rolling high-strength steel Put, for solving in the prior art when producing cold rolling high-strength steel, the fluctuation of low temperature coiling temperature is violent, causes subsequent handling cold rolling The technical problem that the stability of rolling cannot be guaranteed.
The embodiment of the present invention provides a kind of method for manufacturing cold rolling high-strength steel, and methods described includes：
To band plate slab heat, control heating tapping temperature be 1180~1200 DEG C, control the heat time be 180~ 200min；
Roughing is carried out to the band plate slab after heating, it is 980~1000 DEG C to control roughing temperature；
Finish rolling is carried out to the band plate slab after roughing, it is 860~880 DEG C to control finish rolling finishing temperature to roll temperature；
Section cooling is carried out to the band plate slab after finish rolling, in laminar cooling process, controls the main cold-zone domain cooling manifold to be Opening, it is closed mode to control feedback areas cooling manifold.
In such scheme, the band plate slab to after roughing carries out finish rolling, including：Each machine of finish rolling is controlled in finishing stands Default cooling water flow is 40~60% between frame；Control strip speed is more than 8m/s.
In such scheme, controlled in the operation of rolling after default cooling water flow is 40~60% between finishing stand, Also include：
On the basis of the finish rolling finishing temperature, adjusted according to default water-carrying capacity adjusting range dynamic between each frame Default cooling water flow.
In such scheme, the default water-carrying capacity adjusting range is：20~80%.
In such scheme, in the laminar cooling process, it is opening to control main cold-zone domain collector, including：
In each group cooling manifold in the main cold-zone domain, the unlatching ratio for controlling lower collector pipe on each group cooling manifold is 3: 4；The each group collector includes：Upper header and lower collector pipe.
In such scheme, the mass percent with each composition of plate slab includes：C：0.08~0.13%；Si：1.1~ 1.4%；Mn：1.4~2.0%；Al：0.02~0.065%；P≤0.020%.
The embodiment of the present invention also provides a kind of device for manufacturing cold rolling high-strength steel, and described device includes：
First control unit, for when being heated to band plate slab, it to be 1180~1200 to control heating tapping temperature DEG C, it is 180~200min to control the heat time；
Second control unit, for carrying out roughing to the band plate slab after heating, it is 980~1000 to control roughing temperature ℃；
3rd control unit, for after to roughing band plate slab carry out finish rolling, control finish rolling finishing temperature be 860~ 880℃；
4th control unit, during carrying out section cooling for the band plate slab after to finish rolling, control main cold-zone Domain cooling manifold is opening, and it is closed mode to control feedback areas cooling manifold.
In such scheme, the 3rd control unit is specifically used for：Control between finishing stand cooling water flow be 40~ 60%；Control strip speed is more than 8m/s.
In such scheme, the 3rd control unit is specifically used for：
On the basis of the finish rolling finishing temperature, adjusted according to default water-carrying capacity adjusting range dynamic between each frame Default cooling water flow.
In such scheme, the 4th control unit is specifically used for：
In each group cooling manifold in the main cold-zone domain, the unlatching ratio for controlling lower collector pipe on each group cooling manifold is 3: 4；The each group collector includes：Upper header and lower collector pipe.
The embodiments of the invention provide a kind of method and device for manufacturing cold rolling high-strength steel, methods described includes：To strip Slab is heated, and it is 1180~1200 DEG C to control heating tapping temperature, and it is 180~200min to control the heat time；To heating Band plate slab afterwards carries out roughing, and it is 980~1000 DEG C to control roughing temperature；Finish rolling, control are carried out to the band plate slab after roughing Finish rolling finishing temperature processed is 860~880 DEG C；Section cooling is carried out to the band plate slab after finish rolling, in laminar cooling process, control Main cold-zone domain cooling manifold is opening, and it is closed mode to control feedback areas cooling manifold；In this way, furnace temperature is heated out in control Spend for 1180~1200 DEG C, control the heat time effectively to reduce olivine phase Fe for 180~200min2SiO4In heating furnace Interior generation belt steel thickness；By controlling roughing outlet temperature, the main cold-zone domain cooling manifold is controlled to be in laminar cooling process Opening, it is closed mode to control feedback areas cooling manifold, can be avoided because of abnormal feedback regulation caused by temperature fluctuation, And then improve Strip Steel Coiling Temperature control accuracy, avoid coiling temperature big ups and downs, it is ensured that subsequent handling cold rolling it is steady It is qualitative.
Brief description of the drawings
Fig. 1 is the method flow schematic diagram for the manufacture cold rolling high-strength steel that the embodiment of the present invention one provides；
Fig. 2 is the apparatus structure schematic diagram for the manufacture cold rolling high-strength steel that the embodiment of the present invention two provides.
Embodiment
In order to solve in the prior art when producing cold rolling high-strength steel, the fluctuation of low temperature coiling temperature is violent, causes follow-up work The technical problem that the stability of sequence cold rolling cannot be guaranteed, the invention provides it is a kind of manufacture cold rolling high-strength steel method and Device, methods described include：Band plate slab is heated, it is 1180~1200 DEG C to control heating tapping temperature, control heating Time is 180~200min；Roughing is carried out to the band plate slab after heating, it is 980~1000 DEG C to control roughing temperature；To roughing Band plate slab afterwards carries out finish rolling, and it is 860~880 DEG C to control finish rolling finishing temperature；Laminar flow is carried out to the band plate slab after finish rolling Cool down, in laminar cooling process, it is opening to control main cold-zone domain cooling manifold, controls feedback areas cooling manifold to close State.
Technical scheme is described in further detail below by drawings and the specific embodiments.
Embodiment one
The present embodiment provides a kind of method for manufacturing cold rolling high-strength steel, as shown in figure 1, methods described includes：
S101, band plate slab is heated, control heating tapping temperature as 1180~1200 DEG C, control the heat time to be 180~200min；
In this step, band plate slab is heated with the technique of cold melt using fast burn, in order to consider iron olive Olive stone phase Fe2SiO4Generation and generation thickness, control heating tapping temperature as 1180~1200 DEG C, it is therefore preferable to：1190~ 1200℃；It is 180~200min to control the heat time, it is therefore preferable to 185~195min.Wherein, each composition of band plate slab Mass percent include：C：0.08~0.13%；Si：1.1~1.4%；Mn：1.4~2.0%；Al：0.02~0.065%； P≤0.020%.
S102, roughing is carried out to the band plate slab after heating, it is 980~1000 DEG C to control roughing temperature；
Then semi continuous roughing is carried out to the band plate slab after heating, in order to reduce the generation of red rust in the operation of rolling, And ensure finish rolling threading speed, it is 980~1000 DEG C to control roughing temperature, it is therefore preferable to：985~995 DEG C.
S103, finish rolling is carried out to the band plate slab after roughing, it is 860~880 DEG C to control finish rolling finishing temperature；
Then finish rolling is carried out to the band plate slab after roughing using finishing stand, it is 860~880 to control finish rolling finishing temperature DEG C, it is therefore preferable to 865~875 DEG C；Specifically, controlled in finishing stands between each frame of finish rolling default cooling water flow be 40~ 60%；Control strip speed is more than 8m/s, to improve strip water-cooling plate and its even phenomenon of inhomogeneous cooling.
The speed of service includes：Threading speed and mill speed, the threading speed and mill speed are all higher than 8m/s.
In the operation of rolling, it need to also be moved on the basis of the finish rolling finishing temperature according to default water-carrying capacity adjusting range State adjusts default cooling water flow between each frame so that finish rolling finishing temperature finally can be controlled to 860~880 DEG C；Its In, the default water-carrying capacity adjusting range is：20~80%, that is to say, that in the operation of rolling, the cooling water between each frame The adjusting range of valve group open degree is 20~80%.
It should be noted that include six interstand cooling water valve groups in the present embodiment altogether, but the present embodiment is typically opened 4~5 interstand cooling water valve groups are opened, it is opening to control 2 interstand cooling water valve groups close to finishing stand outlet, 2~3 interstand cooling water valve groups for controlling close finishing stand entrance are opening.
S104, section cooling is carried out to the band plate slab after finish rolling, in laminar cooling process, control main cold-zone domain cooling collection Manage as opening, it is closed mode to control feedback areas cooling manifold.
, it is necessary to carry out section cooling to the band plate slab after finish rolling in this step, in laminar cooling process, main cold-zone is controlled Domain cooling manifold is opening, and it is closed mode to control feedback areas cooling manifold.
Specifically, section cooling includes 20 cooling manifold groups in the present embodiment, and main cold-zone domain cooling manifold is 1~18 Group；Feedback areas cooling manifold is 19~20 groups；Every group includes：Upper header and lower collector pipe.The upper header is located on strip Surface, the lower collector pipe are located at below strip lower surface.
Here, in each group cooling manifold in the main cold-zone domain, the unlatching ratio of lower collector pipe on each group cooling manifold is controlled Example is 3:4；Such as in each group cooling manifold when upper lower collector pipe is all 4, then upper header opens 3, and lower collector pipe opens 4.
It should be noted that each group cooling manifold in main cold-zone domain is not to open simultaneously, it is that order is opened successively. Water is than 3 above and below so using:4 concentration refrigerating mode, reducing strip upper surface cooldown rate improves two side portion warping phenomenons, And then strip ponding is avoided, cause temperature fluctuation.And it is closed mode to control feedback areas cooling manifold, can avoid Yin Wen Abnormal feedback regulation caused by degree fluctuation, and then the control accuracy of Strip Steel Coiling Temperature is improved, coiling temperature big ups and downs are avoided, Ensure the stability of subsequent handling cold rolling.
Embodiment two
Corresponding to embodiment one, the present embodiment provides a kind of device for manufacturing cold rolling high-strength steel, as shown in Fig. 2 the dress Put including：First control unit 21, the second control unit 22, the 3rd control unit 23 and the 4th control unit 24；Wherein,
Band plate slab is heated with the technique of cold melt using fast burn, in order to consider fayalite phase Fe2SiO4Generation and generation thickness, the first control unit 21 be used for band plate slab heat when, control heating come out of the stove Temperature is 1180~1200 DEG C, it is therefore preferable to：1190~1100 DEG C；It is 180~200min to control the heat time, it is therefore preferable to 185~195min.
Wherein, the mass percent with each composition of plate slab includes：C：0.08~0.13%；Si：1.1~1.4%； Mn：1.4~2.0%；Al：0.02~0.065%；P≤0.020%.
In order to reduce the generation of red rust in the operation of rolling, and ensure finish rolling threading speed, the second control unit 22 is used for pair Band plate slab after heating carries out roughing, and it is 980~1000 DEG C to control roughing temperature, it is therefore preferable to：985~995 DEG C.
Then finish rolling is carried out to the band plate slab after roughing using finishing stand, the 3rd control unit 23 is used for roughing Band plate slab afterwards carries out finish rolling, and it is 860~880 DEG C to control finish rolling finishing temperature；Specifically, control finish rolling each in finishing stands Default cooling water flow is 40~60% between frame；Control strip speed is more than 8m/s, to improve strip water-cooling plate And its even phenomenon of inhomogeneous cooling.
The speed of service includes：Threading speed and mill speed, the threading speed and mill speed are all higher than 8m/s.
In the operation of rolling, the 3rd control unit 23 need to also be on the basis of the finish rolling finishing temperature, according to default Water-carrying capacity adjusting range dynamic adjust default cooling water flow between each frame so that finish rolling finishing temperature can finally be controlled It is made as 860~880 DEG C；Wherein, the default water-carrying capacity adjusting range is：20~80%, that is to say, that in the operation of rolling In, the adjusting range of the cooling water valve group open degree between each frame is 20~80%.
It should be noted that include six interstand cooling water valve groups in the present embodiment altogether, but the present embodiment is typically opened 4~5 interstand cooling water valve groups are opened, it is opening to control 2 interstand cooling water valve groups close to finishing stand outlet, 2~3 interstand cooling water valve groups for controlling close finishing stand entrance are opening.
4th control unit 24 is used to during the band plate slab after to finish rolling carries out section cooling, control main cold-zone Domain cooling manifold is opening, and it is closed mode to control feedback areas cooling manifold.
Specifically, section cooling includes 20 cooling manifold groups in the present embodiment, and main cold-zone domain cooling manifold is 1~18 Group；Feedback areas cooling manifold is 19~20 groups；Every group includes：Upper header and lower collector pipe.The upper header is located on strip Surface, the lower collector pipe are located at below strip lower surface.
Here, in each group cooling manifold in the main cold-zone domain, on the 4th control unit 24 control each group cooling manifold The unlatching ratio of lower collector pipe is 3:4；Such as in each group cooling manifold when upper lower collector pipe is all 4, then upper header opens 3, Lower collector pipe opens 4.
It should be noted that each group cooling manifold in main cold-zone domain is not to open simultaneously, it is that order is opened successively. Water is than 3 above and below so using:4 concentration refrigerating mode, reducing strip upper surface cooldown rate improves two side portion warping phenomenons, And then strip ponding is avoided, cause temperature fluctuation.And it is closed mode to control feedback areas cooling manifold, can avoid Yin Wen Abnormal feedback regulation caused by degree fluctuation, and then the control accuracy of Strip Steel Coiling Temperature is improved, coiling temperature big ups and downs are avoided, Ensure the stability of subsequent handling cold rolling.
Embodiment three
In practical application, the device of method and embodiment two offer provided according to embodiment one manufactures cold rolling high-strength steel During CR420/780DP, it is implemented as follows：
Here, the mass percent with each composition of plate slab includes：C：0.08~0.10%；Si：1.1~1.2%；Mn： 1.9~2.0%；Al：0.02~0.06%；P≤0.020%.
Band plate slab is heated with the technique of cold melt using fast burn, in order to consider fayalite phase Fe2SiO4Generation and generation thickness, control heating tapping temperature as 1198 DEG C；It is 192min to control the heat time.
Then semi continuous roughing is carried out to the band plate slab after heating, in order to reduce the generation of red rust in the operation of rolling, And ensure finish rolling threading speed, it is 986 DEG C to control roughing outlet temperature.
Finishing stand is recycled to carry out finish rolling to the band plate slab after roughing, it is 870 DEG C to control finish rolling finishing temperature；Specifically Ground, default cooling water flow is 50% between each frame of finish rolling is controlled in finishing stands；It is 9~11m/ to control strip speed S, to improve strip water-cooling plate and its even phenomenon of inhomogeneous cooling.
The speed of service includes：Threading speed and mill speed, the threading speed are 9m/s, and mill speed is 9~11m/s.
In the operation of rolling, it need to also be moved on the basis of the finish rolling finishing temperature according to default water-carrying capacity adjusting range State adjusts default cooling water flow between each frame so that finish rolling finishing temperature finally can be controlled to 870 DEG C；Wherein, institute Stating default water-carrying capacity adjusting range is：20~80%, that is to say, that in the operation of rolling, the cooling water valve group between each frame The adjusting range of open degree is 20~80%.
It should be noted that include six interstand cooling water valve groups in the present embodiment altogether, but the present embodiment is typically opened 4~5 interstand cooling water valve groups are opened, it is opening to control 2 interstand cooling water valve groups close to finishing stand outlet, 3 interstand cooling water valve groups for controlling close finishing stand entrance are opening.
Finally need to carry out the band plate slab after finish rolling section cooling, in laminar cooling process, control main cold-zone domain cold But collector is opening, and it is closed mode to control feedback areas cooling manifold.
Specifically, section cooling includes 20 cooling manifold groups in the present embodiment, and main cold-zone domain cooling manifold is 1~18 Group；Feedback areas cooling manifold is 19~20 groups；Every group includes：Upper header and lower collector pipe.The upper header is located on strip Surface, the lower collector pipe are located at below strip lower surface.
Here, in each group cooling manifold in the main cold-zone domain, the unlatching ratio of lower collector pipe on each group cooling manifold is controlled Example is 3:4；Such as in each group cooling manifold when upper lower collector pipe is all 4, then upper header opens 3, and lower collector pipe opens 4. Presetting unlatching upper header 27, lower collector pipe 34 altogether.
It should be noted that each group cooling manifold in main cold-zone domain is not to open simultaneously, it is that order is opened successively. Water is than 3 above and below so using:4 concentration refrigerating mode, reducing strip upper surface cooldown rate improves two side portion warping phenomenons, And then strip ponding is avoided, cause temperature fluctuation.And it is closed mode to control feedback areas cooling manifold, can avoid Yin Wen Abnormal feedback regulation caused by degree fluctuation, and then the control accuracy of Strip Steel Coiling Temperature is improved, coiling temperature big ups and downs are avoided, It is final to ensure that coiling temperature is 540 DEG C, it is ensured that the stability of subsequent handling cold rolling.
Example IV
In practical application, the device of method and embodiment two offer provided according to embodiment one manufactures cold rolling high-strength steel During TRIP590P, it is implemented as follows：
Here, the mass percent with each composition of plate slab includes：C：0.11~0.13%；Si：1.1~1.3%；Mn： 1.4~1.6%；Al：0.035~0.065%；P≤0.020%.
Band plate slab is heated with the technique of cold melt using fast burn, in order to consider fayalite phase Fe2SiO4Generation and generation thickness, control heating tapping temperature as 1200 DEG C；It is 198min to control the heat time.
Then semi continuous roughing is carried out to the band plate slab after heating, in order to reduce the generation of red rust in the operation of rolling, And ensure finish rolling threading speed, it is 1000 DEG C to control roughing temperature.
Finishing stand is recycled to carry out finish rolling to the band plate slab after roughing, it is 875 DEG C to control finish rolling finishing temperature；Specifically Ground, default cooling water flow is 50% between each frame of finish rolling is controlled in finishing stands；Control strip speed for 8.5~ 10.8m/s, to improve strip water-cooling plate and its even phenomenon of inhomogeneous cooling.
The speed of service includes：Threading speed and mill speed, the threading speed are that 8.5m/s and mill speed are equal For 8.5~10.8m/s.
In the operation of rolling, it need to also be moved on the basis of the finish rolling finishing temperature according to default water-carrying capacity adjusting range State adjusts default cooling water flow between each frame so that finish rolling finishing temperature finally can be controlled to 875 DEG C；Wherein, institute Stating default water-carrying capacity adjusting range is：20~80%, that is to say, that in the operation of rolling, the cooling water valve group between each frame The adjusting range of open degree is 20~80%.
It should be noted that include six interstand cooling water valve groups in the present embodiment altogether, but the present embodiment is typically opened 4~5 interstand cooling water valve groups are opened, it is opening to control 2 interstand cooling water valve groups close to finishing stand outlet, 3 interstand cooling water valve groups for controlling close finishing stand entrance are opening.
Need to carry out the band plate slab after finish rolling section cooling, in laminar cooling process, control main cold-zone domain cooling collection Manage as opening, it is closed mode to control feedback areas cooling manifold.
Specifically, section cooling includes 20 cooling manifold groups in the present embodiment, and main cold-zone domain cooling manifold is 1~18 Group；Feedback areas cooling manifold is 19~20 groups；Every group includes：Upper header and lower collector pipe.The upper header is located on strip Surface, the lower collector pipe are located at below strip lower surface.
Here, in each group cooling manifold in the main cold-zone domain, the unlatching ratio of lower collector pipe on each group cooling manifold is controlled Example is 3:4；Such as in each group cooling manifold when upper lower collector pipe is all 4, then upper header opens 3, and lower collector pipe opens 4. Total presetting unlatching upper header 12, lower collector pipe 16 in the present embodiment
It should be noted that each group cooling manifold in main cold-zone domain is not to open simultaneously, it is that order is opened successively. Water is than 3 above and below so using:4 concentration refrigerating mode, reducing strip upper surface cooldown rate improves two side portion warping phenomenons, And then strip ponding is avoided, cause temperature fluctuation.And it is closed mode to control feedback areas cooling manifold, can avoid Yin Wen Abnormal feedback regulation caused by degree fluctuation, and then the control accuracy of Strip Steel Coiling Temperature is improved, coiling temperature big ups and downs are avoided, It is final to ensure that coiling temperature is 550 DEG C, it is ensured that the stability of subsequent handling cold rolling.
The beneficial effect that the method and device of manufacture cold rolling high-strength steel provided in an embodiment of the present invention can be brought is at least：
The embodiments of the invention provide a kind of method and device for manufacturing cold rolling high-strength steel, methods described includes：To strip Slab is heated, and it is 1180~1200 DEG C to control heating tapping temperature, and it is 180~200min to control the heat time；To heating Band plate slab afterwards carries out roughing, and it is 980~1000 DEG C to control roughing temperature, to reduce the generation of red rust in the operation of rolling；It is right Band plate slab after roughing carries out finish rolling, and it is 860~880 DEG C to control finish rolling finishing temperature,；Band plate slab after finish rolling is carried out Section cooling, in laminar cooling process, it is opening to control main cold-zone domain cooling manifold, controls the feedback areas cooling manifold to be Closed mode；In this way, it is 1180~1200 DEG C to control heating tapping temperature, the heat time is controlled to have for 180~200min Effect reduces olivine phase Fe2SiO4Generation belt steel thickness in heating furnace；By controlling roughing outlet temperature, in section cooling During control the main cold-zone domain cooling manifold to be opening, it is closed mode to control feedback areas cooling manifold, reduces strip Upper surface cooldown rate improves two side portion warping phenomenons, can avoid strip ponding, and then avoid because different caused by temperature fluctuation Normal feedback regulation, and then the control accuracy of Strip Steel Coiling Temperature is improved, avoid coiling temperature big ups and downs, it is ensured that subsequent handling is cold The stability of rolling.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention, it is all All any modification, equivalent and improvement made within the spirit and principles in the present invention etc., it should be included in the protection of the present invention Within the scope of.

Claims (10)

  1. A kind of 1. method for manufacturing cold rolling high-strength steel, it is characterised in that methods described includes：
    To band plate slab heat, control heating tapping temperature be 1180~1200 DEG C, control the heat time be 180~ 200min；
    Roughing is carried out to the band plate slab after heating, it is 980~1000 DEG C to control roughing temperature；
    Finish rolling is carried out to the band plate slab after roughing, it is 860~880 DEG C to control finish rolling finishing temperature；
    Section cooling is carried out to the band plate slab after finish rolling, in laminar cooling process, controls main cold-zone domain cooling manifold to open State, it is closed mode to control feedback areas cooling manifold.
  2. 2. the method as described in claim 1, it is characterised in that the band plate slab to after roughing carries out finish rolling, including：Essence Default cooling water flow is 40~60% between each frame of finish rolling is controlled during rolling；Control strip speed is more than 8m/s.
  3. 3. method as claimed in claim 2, it is characterised in that default cooling between finishing stand is controlled in the operation of rolling After water-carrying capacity is 40~60%, in addition to：
    On the basis of the finish rolling finishing temperature, preset between adjusting each frame according to default water-carrying capacity adjusting range dynamic Cooling water flow.
  4. 4. method as claimed in claim 3, it is characterised in that the default water-carrying capacity adjusting range is：20~80%.
  5. 5. the method as described in claim 1, it is characterised in that in the laminar cooling process, control the main cold-zone domain collector to be Opening, including：
    In each group cooling manifold in the main cold-zone domain, the unlatching ratio for controlling lower collector pipe on each group cooling manifold is 3:4；Institute Stating each group collector includes：Upper header and lower collector pipe.
  6. 6. the method as described in claim 1, it is characterised in that the mass percent with each composition of plate slab includes：C： 0.08~0.13%；Si：1.1~1.4%；Mn：1.4~2.0%；Al：0.02~0.065%；P≤0.020%.
  7. 7. a kind of device for manufacturing cold rolling high-strength steel, it is characterised in that described device includes：
    First control unit, for when being heated to band plate slab, it to be 1180~1200 DEG C to control heating tapping temperature, control Heat time processed is 180~200min；
    Second control unit, for carrying out roughing to the band plate slab after heating, it is 980~1000 DEG C to control roughing temperature；
    3rd control unit, finish rolling is carried out for the band plate slab after to roughing, it is 860~880 to control finish rolling finishing temperature ℃；
    4th control unit, during carrying out section cooling for the band plate slab after to finish rolling, control main cold-zone domain cold But collector is opening, and it is closed mode to control feedback areas cooling manifold.
  8. 8. device as claimed in claim 7, it is characterised in that the 3rd control unit is specifically used for：Control finishing stand Between cooling water flow be 40~60%；Control strip speed is more than 8m/s.
  9. 9. device as claimed in claim 8, it is characterised in that the 3rd control unit is specifically used for：
    On the basis of the finish rolling finishing temperature, preset between adjusting each frame according to default water-carrying capacity adjusting range dynamic Cooling water flow.
  10. 10. device as claimed in claim 7, it is characterised in that the 4th control unit is specifically used for：
    In each group cooling manifold in the main cold-zone domain, the unlatching ratio for controlling lower collector pipe on each group cooling manifold is 3:4；Institute Stating each group collector includes：Upper header and lower collector pipe.
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CN112207138A (en) * 2020-09-25 2021-01-12 攀钢集团西昌钢钒有限公司 Method for stably controlling finish rolling temperature of high-grade pipeline steel
CN113059003A (en) * 2021-03-01 2021-07-02 首钢京唐钢铁联合有限责任公司 Method for controlling acid edge crack of cold-rolled high-strength steel

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