CN107828951B - A kind of method and device manufacturing cold rolling high-strength steel - Google Patents

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

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Publication number
CN107828951B
CN107828951B CN201710957654.7A CN201710957654A CN107828951B CN 107828951 B CN107828951 B CN 107828951B CN 201710957654 A CN201710957654 A CN 201710957654A CN 107828951 B CN107828951 B CN 107828951B
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control
cooling
temperature
plate slab
band plate
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CN107828951A (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 embodiment of the invention provides a kind of method and device for manufacturing cold rolling high-strength steel, method includes: to heat to band plate slab, and control heating tapping temperature is 1180~1200 DEG C, and control heating time is 180~200min；Roughing is carried out to the band plate slab after heating, control roughing temperature is 980~1000 DEG C；Finish rolling is carried out to the band plate slab after roughing, control finish rolling finishing temperature is 860~880 DEG C；Section cooling is carried out to the band plate slab after finish rolling, in laminar cooling process, controlling main cold-zone domain cooling manifold is open state, and control feedback areas cooling manifold is in off state；So, it is open state that main cold-zone domain cooling manifold is controlled in laminar cooling process, feedback areas cooling manifold is in off state, it can be to avoid the abnormal feedback regulation generated by temperature fluctuation, and then improve the control precision 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 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 devices for manufacturing cold rolling high-strength steel.
Background technique
In technical field of steel production, silicon is the common element for improving hardenability of steel, improving product intensity, cold at present It rolls in high-strength steel and is designed based on dual phase steel, TRIP steel containing high level silicon ingredient, but the addition of silicon ingredient leads to strip Surface red rust defect is serious, final to influence client's use.To solve the problems, such as surface red rust, require to execute what low temperature batched in production Process system, but the elongated strip shape quality of water cooled rear strip is poor, and coiling temperature fluctuation is acutely, batches temperature error with target It is too big, influence the stability of subsequent handling cold rolling.
Summary of the invention
In view of the problems of the existing technology, the embodiment of the invention provides a kind of methods and dress for manufacturing cold rolling high-strength steel It sets, for solving in the prior art when producing cold rolling high-strength steel, the fluctuation of low temperature coiling temperature acutely, leads to subsequent handling cold rolling The technical issues of stability of rolling cannot be guaranteed.
The embodiment of the present invention provides a kind of method for manufacturing cold rolling high-strength steel, which comprises
To band plate slab heat, control heating tapping temperature be 1180~1200 DEG C, control heating time be 180~ 200min；
Roughing is carried out to the band plate slab after heating, control roughing temperature is 980~1000 DEG C；
Finish rolling is carried out to the band plate slab after roughing, control finish rolling finishing temperature is 860~880 DEG C to roll temperature；
Section cooling is carried out to the band plate slab after finish rolling, in laminar cooling process, controlling main cold-zone domain cooling manifold is Open state, control feedback areas cooling manifold are in off state.
In above scheme, the band plate slab to after roughing carries out finish rolling, comprising: each machine of finish rolling is controlled in finishing stands Preset cooling water flow is 40~60% between frame；It controls strip speed and is greater than 8m/s.
In above scheme, after preset cooling water flow is 40~60% between control finishing rolling mill in the operation of rolling, Further include:
On the basis of the finish rolling finishing temperature, adjusted between each rack according to preset water flow adjusting range dynamic Preset cooling water flow.
In above scheme, the preset water flow adjusting range are as follows: 20~80%.
In above scheme, in the laminar cooling process, controlling main cold-zone domain collector is open state, comprising:
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 above scheme, the mass percent with each ingredient 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 heating to band plate slab, control heating tapping temperature to be 1180~1200 DEG C, control heating time is 180~200min；
Second control unit, for carrying out roughing to the band plate slab after heating, control roughing temperature is 980~1000 ℃；
Third control unit, for after roughing band plate slab carry out finish rolling, control finish rolling finishing temperature be 860~ 880℃；
4th control unit, for controlling main cold-zone during carrying out section cooling to the band plate slab after finish rolling Domain cooling manifold is open state, and control feedback areas cooling manifold is in off state.
In above scheme, the third control unit is specifically used for: control finishing rolling mill between cooling water flow be 40~ 60%；It controls strip speed and is greater than 8m/s.
In above scheme, the third control unit is specifically used for:
On the basis of the finish rolling finishing temperature, adjusted between each rack according to preset water flow adjusting range dynamic Preset cooling water flow.
In above 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 embodiment of the invention provides a kind of method and devices for manufacturing cold rolling high-strength steel, which comprises to strip Slab is heated, and control heating tapping temperature is 1180~1200 DEG C, and control heating time is 180~200min；To heating Band plate slab afterwards carries out roughing, and control roughing temperature is 980~1000 DEG C；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 open state, and control feedback areas cooling manifold is in off state；In this way, furnace temperature is heated out in control Degree is 1180~1200 DEG C, and control heating time is that 180~200min can effectively reduce olivine phase Fe2SiO4In heating furnace Interior generation steel strip thickness；By controlling roughing outlet temperature, main cold-zone domain cooling manifold is controlled in laminar cooling process is Open state, control feedback areas cooling manifold be in off state, can to avoid the abnormal feedback regulation generated by temperature fluctuation, And then improve Strip Steel Coiling Temperature control precision, avoid coiling temperature big ups and downs, it is ensured that subsequent handling cold rolling it is steady It is qualitative.
Detailed description of the invention
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 of manufacture cold rolling high-strength steel provided by Embodiment 2 of the present invention.
Specific embodiment
In order to solve in the prior art when producing cold rolling high-strength steel, the fluctuation of low temperature coiling temperature acutely, leads to subsequent work The technical issues of stability of sequence cold rolling cannot be guaranteed, the present invention provides it is a kind of manufacture cold rolling high-strength steel method and Device, which comprises band plate slab is heated, control heating tapping temperature is 1180~1200 DEG C, control heating Time is 180~200min；Roughing is carried out to the band plate slab after heating, control roughing temperature is 980~1000 DEG C；To roughing Band plate slab afterwards carries out finish rolling, and control finish rolling finishing temperature is 860~880 DEG C；Laminar flow is carried out to the band plate slab after finish rolling Cooling, in laminar cooling process, controlling main cold-zone domain cooling manifold is open state, and control feedback areas cooling manifold is to close State.
Technical solution of the present invention is described in further detail below by drawings and the specific embodiments.
Embodiment one
The present embodiment provides a kind of methods for manufacturing cold rolling high-strength steel, as shown in Figure 1, which comprises
S101, to band plate slab heat, control heating tapping temperature be 1180~1200 DEG C, control heating time be 180~200min；
In this step, band plate slab is heated with the technique of cold melt using fast burn, in order to comprehensively consider iron olive Olive stone phase Fe2SiO4Generation and generate thickness, control heating tapping temperature be 1180~1200 DEG C, it is therefore preferable to: 1190~ 1200℃；Control heating time is 180~200min, it is therefore preferable to 185~195min.Wherein, each ingredient 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 carries out roughing to the band plate slab after heating, and control roughing temperature is 980~1000 DEG C；
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 guarantee finish rolling threading speed, and control roughing temperature is 980~1000 DEG C, it is therefore preferable to: 985~995 DEG C.
S103 carries out finish rolling to the band plate slab after roughing, and control finish rolling finishing temperature is 860~880 DEG C；
Then finish rolling is carried out to the band plate slab after roughing using finishing rolling mill, control finish rolling finishing temperature is 860~880 DEG C, it is therefore preferable to 865~875 DEG C；Specifically, in finishing stands control each rack of finish rolling between preset cooling water flow be 40~ 60%；It controls strip speed and is greater than 8m/s, Lai Gaishan strip water-cooling plate and its even phenomenon of inhomogeneous cooling.
The speed of service includes: threading speed and mill speed, and the threading speed and mill speed are all larger than 8m/s.
It during the rolling process, need to also be dynamic according to preset water flow adjusting range on the basis of the finish rolling finishing temperature State adjusts preset cooling water flow between each rack, so that finish rolling finishing temperature finally can be controlled to 860~880 DEG C；Its In, the preset water flow adjusting range are as follows: 20~80%, that is to say, that during the rolling process, the cooling water between each rack The adjusting range of valve group open degree is 20~80%.
It should be noted that include altogether six interstand cooling water valve groups in the present embodiment, but the present embodiment is generally opened 4~5 interstand cooling water valve groups are opened, controlling 2 interstand cooling water valve groups close to finishing rolling mill outlet is open state, 2~3 interstand cooling water valve groups for controlling close finishing rolling mill entrance are open state.
S104 carries out section cooling to the band plate slab after finish rolling, in laminar cooling process, controls the cooling collection in main cold-zone domain Pipe is open state, and control feedback areas cooling manifold is in off state.
In this step, needs to carry out section cooling to the band plate slab after finish rolling, in laminar cooling process, control main cold-zone Domain cooling manifold is open state, and control feedback areas cooling manifold is in off state.
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；For example, then upper header opens 3, lower collector pipe opens 4 when upper lower collector pipe is all 4 in each group cooling manifold.
It should be noted that each group cooling manifold in main cold-zone domain is not to open simultaneously, it is that successively sequence is opened. In this way using the concentration refrigerating mode being above lauched than 3:4, reducing strip upper surface cooling rate improves two sides edge warping phenomenon, And then strip ponding is avoided, lead to temperature fluctuation.And feedback areas cooling manifold is controlled to be in off state, it can be to avoid because of temperature The abnormal feedback regulation that degree fluctuation generates, and then the control precision 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 devices for manufacturing cold rolling high-strength steel, as shown in Fig. 2, the dress Set includes: first control unit 21, the second control unit 22, third 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 comprehensively consider fayalite phase Fe2SiO4Generation and generate thickness, 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；Control heating time is 180~200min, it is therefore preferable to 185~195min.
Wherein, the mass percent with each ingredient 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 guarantee finish rolling threading speed, the second control unit 22 for pair Band plate slab after heating carries out roughing, and control roughing temperature is 980~1000 DEG C, it is therefore preferable to: 985~995 DEG C.
Then finish rolling is carried out to the band plate slab after roughing using finishing rolling mill, third control unit 23 is used for roughing Band plate slab afterwards carries out finish rolling, and control finish rolling finishing temperature is 860~880 DEG C；Specifically, it is each that finish rolling is controlled in finishing stands Preset cooling water flow is 40~60% between rack；It controls strip speed and is greater than 8m/s, Lai Gaishan strip water-cooling plate And its even phenomenon of inhomogeneous cooling.
The speed of service includes: threading speed and mill speed, and the threading speed and mill speed are all larger than 8m/s.
During the rolling process, the third control unit 23 need to also be on the basis of the finish rolling finishing temperature, according to default Water flow adjusting range dynamic adjust preset cooling water flow between each rack so that finish rolling finishing temperature can finally be controlled It is made as 860~880 DEG C；Wherein, the preset water flow adjusting range are as follows: 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 rack is 20~80%.
It should be noted that include altogether six interstand cooling water valve groups in the present embodiment, but the present embodiment is generally opened 4~5 interstand cooling water valve groups are opened, controlling 2 interstand cooling water valve groups close to finishing rolling mill outlet is open state, 2~3 interstand cooling water valve groups for controlling close finishing rolling mill entrance are open state.
4th control unit 24 is used to control main cold-zone during carrying out section cooling to the band plate slab after finish rolling Domain cooling manifold is open state, and control feedback areas cooling manifold is in off state.
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 4th control unit 24 is controlled on each group cooling manifold The unlatching ratio of lower collector pipe is 3:4；For example, when upper lower collector pipe is all 4 in each group cooling manifold, 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 successively sequence is opened. In this way using the concentration refrigerating mode being above lauched than 3:4, reducing strip upper surface cooling rate improves two sides edge warping phenomenon, And then strip ponding is avoided, lead to temperature fluctuation.And feedback areas cooling manifold is controlled to be in off state, it can be to avoid because of temperature The abnormal feedback regulation that degree fluctuation generates, and then the control precision 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 manufacturing cold rolling high-strength steel of method and embodiment two offer provided according to embodiment one When CR420/780DP, it is implemented as follows:
Here, the mass percent with each ingredient 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 comprehensively consider fayalite phase Fe2SiO4Generation and generate thickness, control heating tapping temperature be 1198 DEG C；Control heating time is 192min.
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 guaranteeing finish rolling threading speed, control roughing outlet temperature is 986 DEG C.
Finishing rolling mill is recycled to carry out finish rolling to the band plate slab after roughing, control finish rolling finishing temperature is 870 DEG C；Specifically Ground, preset cooling water flow is 50% between each rack of finish rolling is controlled in finishing stands；Control strip speed is 9~11m/ S, Lai Gaishan strip water-cooling plate and its even phenomenon of inhomogeneous cooling.
The speed of service includes: threading speed and mill speed, and the threading speed is 9m/s and mill speed is 9~11m/s.
It during the rolling process, need to also be dynamic according to preset water flow adjusting range on the basis of the finish rolling finishing temperature State adjusts preset cooling water flow between each rack, so that finish rolling finishing temperature finally can be controlled to 870 DEG C；Wherein, institute State preset water flow adjusting range are as follows: 20~80%, that is to say, that during the rolling process, the cooling water valve group between each rack The adjusting range of open degree is 20~80%.
It should be noted that include altogether six interstand cooling water valve groups in the present embodiment, but the present embodiment is generally opened 4~5 interstand cooling water valve groups are opened, controlling 2 interstand cooling water valve groups close to finishing rolling mill outlet is open state, 3 interstand cooling water valve groups for controlling close finishing rolling mill entrance are open state.
It finally needs to carry out section cooling to the band plate slab after finish rolling, in laminar cooling process, it is cold to control main cold-zone domain But collector is open state, and control feedback areas cooling manifold is in off state.
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；For example, then upper header opens 3, lower collector pipe opens 4 when upper lower collector pipe is all 4 in each group cooling manifold. Presetting unlatching upper header 27, lower collector pipe 34 in total.
It should be noted that each group cooling manifold in main cold-zone domain is not to open simultaneously, it is that successively sequence is opened. In this way using the concentration refrigerating mode being above lauched than 3:4, reducing strip upper surface cooling rate improves two sides edge warping phenomenon, And then strip ponding is avoided, lead to temperature fluctuation.And feedback areas cooling manifold is controlled to be in off state, it can be to avoid because of temperature The abnormal feedback regulation that degree fluctuation generates, and then the control precision of Strip Steel Coiling Temperature is improved, coiling temperature big ups and downs are avoided, Finally 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 manufacturing cold rolling high-strength steel of method and embodiment two offer provided according to embodiment one When TRIP590P, it is implemented as follows:
Here, the mass percent with each ingredient 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 comprehensively consider fayalite phase Fe2SiO4Generation and generate thickness, control heating tapping temperature be 1200 DEG C；Control heating time is 198min.
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 guaranteeing finish rolling threading speed, control roughing temperature is 1000 DEG C.
Finishing rolling mill is recycled to carry out finish rolling to the band plate slab after roughing, control finish rolling finishing temperature is 875 DEG C；Specifically Ground, preset cooling water flow is 50% between each rack of finish rolling is controlled in finishing stands；Control strip speed be 8.5~ 10.8m/s, Lai Gaishan strip water-cooling plate and its even phenomenon of inhomogeneous cooling.
The speed of service includes: threading speed and mill speed, and the threading speed is that 8.5m/s and mill speed are equal For 8.5~10.8m/s.
It during the rolling process, need to also be dynamic according to preset water flow adjusting range on the basis of the finish rolling finishing temperature State adjusts preset cooling water flow between each rack, so that finish rolling finishing temperature finally can be controlled to 875 DEG C；Wherein, institute State preset water flow adjusting range are as follows: 20~80%, that is to say, that during the rolling process, the cooling water valve group between each rack The adjusting range of open degree is 20~80%.
It should be noted that include altogether six interstand cooling water valve groups in the present embodiment, but the present embodiment is generally opened 4~5 interstand cooling water valve groups are opened, controlling 2 interstand cooling water valve groups close to finishing rolling mill outlet is open state, 3 interstand cooling water valve groups for controlling close finishing rolling mill entrance are open state.
It needs to carry out section cooling to the band plate slab after finish rolling, in laminar cooling process, controls the cooling collection in main cold-zone domain Pipe is open state, and control feedback areas cooling manifold is in off state.
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；For example, then upper header opens 3, lower collector pipe opens 4 when upper lower collector pipe is all 4 in each group cooling manifold. Total presetting upper header 12, lower collector pipe 16 of opening is it should be noted that the cooling collection of each group in main cold-zone domain in the present embodiment Pipe is not to open simultaneously, is that successively sequence is opened.In this way using the concentration refrigerating mode being above lauched than 3:4, band is reduced Steel upper surface cooling rate improves two sides edge warping phenomenon, and then avoids strip ponding, leads to temperature fluctuation.And it controls anti- Feedback region cooling manifold is in off state, can be to avoid the abnormal feedback regulation generated by temperature fluctuation, and then improves band coil of strip The control precision for taking temperature, avoids coiling temperature big ups and downs, finally ensures that coiling temperature is 550 DEG C, it is ensured that subsequent handling is cold The stability of rolling.
The method and device energy bring beneficial effect of manufacture cold rolling high-strength steel provided in an embodiment of the present invention is at least:
The embodiment of the invention provides a kind of method and devices for manufacturing cold rolling high-strength steel, which comprises to strip Slab is heated, and control heating tapping temperature is 1180~1200 DEG C, and control heating time is 180~200min；To heating Band plate slab afterwards carries out roughing, and control roughing temperature is 980~1000 DEG C, 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 control finish rolling finishing temperature is 860~880 DEG C,；Band plate slab after finish rolling is carried out Section cooling, in laminar cooling process, controlling main cold-zone domain cooling manifold is open state, and control feedback areas cooling manifold is Closed state；In this way, control heating tapping temperature is 1180~1200 DEG C, control heating time is that 180~200min can have Effect reduces olivine phase Fe2SiO4Generation steel strip thickness in heating furnace；By controlling roughing outlet temperature, in section cooling Controlling main cold-zone domain cooling manifold in the process is open state, and control feedback areas cooling manifold is in off state, and reduces strip Upper surface cooling rate improves two sides edge warping phenomenon, can avoid strip ponding, and then avoids generating because of temperature fluctuation different Normal feedback regulation, and then the control precision 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 Made any modifications, equivalent replacements, and improvements etc. within the spirit and principles in the present invention, should be included in protection of the invention Within the scope of.

Claims (3)

1. a kind of method for manufacturing cold rolling high-strength steel, which is characterized in that the described method includes:
To band plate slab heat, control heating tapping temperature be 1180~1200 DEG C, control heating time be 180~ 200min；
Roughing is carried out to the band plate slab after heating, control roughing temperature is 980~1000 DEG C；
Finish rolling is carried out to the band plate slab after roughing, control finish rolling finishing temperature is 860~880 DEG C；Essence is controlled in finishing stands Preset cooling water flow is 40~60% between rolling each rack；It controls strip speed and is greater than 8m/s；With the finish rolling finish to gauge On the basis of temperature, preset cooling water flow between each rack is dynamically adjusted according to preset water flow adjusting range；It is described Preset water flow adjusting range are as follows: 20~80%；
Section cooling is carried out to the band plate slab after finish rolling, in laminar cooling process, controlling main cold-zone domain each group cooling manifold is Open state, control feedback areas each group cooling manifold are in off state；The main cold-zone domain and feedback areas it is described each Group collector includes: upper header and lower collector pipe；In each group cooling manifold in the main cold-zone domain, each group cooling manifold or more is controlled The unlatching ratio of collector is 3:4.
2. the method as described in claim 1, which is characterized in that the mass percent with each ingredient 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%.
3. a kind of device for manufacturing cold rolling high-strength steel, which is characterized in that described device includes:
First control unit, for when heating to band plate slab, control heating tapping temperature to be 1180~1200 DEG C, control Heating time processed is 180~200min；
Second control unit, for carrying out roughing to the band plate slab after heating, control roughing temperature is 980~1000 DEG C；
Third control unit, for carrying out finish rolling to the band plate slab after roughing, control finish rolling finishing temperature is 860~880 ℃；
4th control unit, for it is cold to control main cold-zone domain during carrying out section cooling to the band plate slab after finish rolling But collector is open state, and control feedback areas cooling manifold is in off state；
The third control unit is specifically used for: cooling water flow is 40~60% between control finishing rolling mill；Control strip operation Speed is greater than 8m/s；On the basis of the finish rolling finishing temperature, adjusted according to preset water flow adjusting range dynamic described each Preset cooling water flow between rack；
The each group collector of main cold-zone domain and feedback areas includes: upper header and lower collector pipe；The 4th control unit tool Body is 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。
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