CN106734317A - A kind of production method of control normalizing type thin specification steel plate template - Google Patents
A kind of production method of control normalizing type thin specification steel plate template Download PDFInfo
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- CN106734317A CN106734317A CN201611096096.1A CN201611096096A CN106734317A CN 106734317 A CN106734317 A CN 106734317A CN 201611096096 A CN201611096096 A CN 201611096096A CN 106734317 A CN106734317 A CN 106734317A
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- steel plate
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/04—Thickness, gauge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/10—Compression, e.g. longitudinal compression
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
Abstract
The invention discloses a kind of production method of control normalizing type thin specification steel plate template, including heating of plate blank, rolling, roller repairing, aligning, heat treatment step, the rolling process, using I-stage high temperature rolling technique, start rolling temperature is 1050~1100 DEG C, finishing temperature is 850~900 DEG C.The present invention effectively solves the problems, such as existing steel plate factory production 6~15mm thickness Thin Specs heat-treated steel plate templates by the scientifically and rationally technological parameter such as distribution heating steel billet, rolling, cooling, aligning, heat treatment.
Description
Technical field
The present invention relates to hot rolled plate technology field, more particularly, to one kind control normalizing type thin specification steel plate template
Production method.
Background technology
In recent years, with the development that engineering is manufactured, thickness is increasing in the demand of 6~15mm thin specification steel plates.But
This kind of thin specification steel plate is raw due to there is the features such as raw material base is small, rolling temperature drop is fast, more sensitive to temperature change, hardness is high
During product in addition to performance easily causes fluctuation, also easily there are the plate shape problems such as discount, camber, side wave, production control is difficult
Degree is big, low production efficiency, and outside the plan to change high with rate, properties percent of pass is relatively low, causes and not can manufacture, has had a strong impact on the country
The production of thin plate and the market demand.
In addition, domestic majority steel plate factory is when this kind of thin specification steel plate is produced, by capacity of equipment, technology and operation water
Plate shape after flat limitation, steel plate rolling or heat treatment is difficult to stability contorting.I.e. thin specification steel plate is to the slab during production
Heating-up temperature, rolling procedure, equipment control ability and process operation level etc. propose requirement higher, therefore this kind of steel plate
The research of Strip Shape Control technology seems most important and urgent.
The content of the invention
It is of the invention that a kind of process of control normalizing type thin specification steel plate template is provided, by reasonably heating, rolling,
Cooling, aligning and heat-treatment technology method, effectively solve existing steel plate factory production 6~15mm thickness Thin Specs heat-treated steel plates
Instability problem, it is ensured that steel plate has good surface quality, stabilizes performance, reaches the ability that can be mass.
The purpose of the present invention, a kind of technique of control normalizing type thin specification steel plate template can be realized by following technical proposals
Method, a kind of process of control normalizing type thin specification steel plate template, including heating of plate blank, rolling, roller repairing, aligning,
Heat treatment step, the rolling process strengthens high temperature section rolling, and using I-stage high temperature rolling technique, start rolling temperature is 1050~
1100 DEG C, finishing temperature be 850~900 DEG C, using high temperature dynamic recrystallization, reach the purpose that crystal grain thinning ensures performance.
Heating of plate blank operation of the present invention, slab is heated in continuous oven, and heating-up temperature is 1230~1250 DEG C, total to add
The hot time >=10min/cm × h, soaking time >=2min/cm × h, h is thickness of strand, and unit is cm, it is ensured that heating steel billet
Uniformly.
Rolling process of the present invention, uses single pass heavy reduction, preceding several passage overall reductions to reach in high temperature section
85~92%, last 2 passages are as planishing pass controlling plate shape.
Roller repairing operation of the present invention, as H ＜ 8mm, does not carry out ACC coolings, that is, rapid cooling 1,3 systems are closed after rolling,
Steel plate passes through ACC cooling systems with the roller speed of 2.5m/s；When H is 8~15mm, carries out ACC coolings, i.e. ACC and open in advance soon
Cold 1,3 systems, using the roller speed of 1.8~2.0m/s, it is ensured that steel plate is quickly through water-cooled ACC system；The H be steel plate finished product in the least
Meter Hou Du.
Aligning operation of the present invention, increases aligning passage, improves straightening force, according to every all over small one and large one two kinds of straightening forces
Carry out at least twice aligning, cold bed steel plate flatness in raising.
In Technology for Heating Processing of the present invention, completed by normalized treatment, normalizing degree is reduced, using 850~870 DEG C
Low Temperature Heat Treatment, shortens time inside furnace, and total heat time is 40~60min, it is ensured that N gas shieldeds play respective action in stove, with
The generation of surface of steel plate iron scale is reduced, that is, being not required to the treatment such as ball blast can just meet delivery requirements.
Rolling process of the present invention, is rolled, using roll neck between 1020~1120mm using finishing mill single chassis
Plain-barreled roll, setting road number of times 7~9 road.
Roller repairing operation of the present invention, during roller repairing, water-cooled water ratio is refined according to steel plate width, is subtracted
Light width 3000mm above steel plate head wooden dippers Qu Xianxiang.I.e. for finished product thickness in the range of 8~15mm steel plate, as D ＜
3000mm, upper and lower water-cooled water ratio is 1：（1.3~1.4）；As D >=3000mm, upper and lower water-cooled water ratio is 1：（1.1~1.2）；It is described
D is steel plate finished product mm in width.
Aligning operation of the present invention, straightening temperature be 400~750 DEG C, straightener inlet roll gap be steel plate thickness-（4~
5）Mm, straightening force is between 200~300t.
Rolling process of the present invention, selection is in the non-phase rolling of roll, the 3rd class's rolling after roll change.
The heat treatment thin plate unevenness measured using the inventive method can reach within 5mm/m, within 6mm/2m, i.e. steel plate
Within 5mm, every 2 meters of unevenness are within 6mm for every meter of unevenness of any direction.
The present invention suitable for the thin specification steel plate of plate shape requirement heat treatment class higher production, steel plate thickness 6~
In the range of 15mm.
It is using the beneficial effect produced by above-mentioned technical proposal：1st, by control method of the present invention prepare heat at
The thin specification steel plate for managing class not only meets corresponding performance requirement, also preferably ensure that steel plate template, improves steel plate table
Face quality；2nd, using steel plate factory existing equipment ability and production capacity, only control to be achieved by the method in production technology
Extras cost of investment need not be increased in this target, i.e. production process, current most of steel plate factories are all easily realized；
3rd, every process system of steel plate is more relaxed, can on generous printed line steady production；4th, present invention is especially suited for thickness 6~
The batch production of 15mm steel plates；5th, low production cost, the market competitiveness is strong, meets the growing market demand.
Specific embodiment
The present invention is described in further details with reference to embodiment.
Embodiment 1
Thickness is 6mm, the control process of the normalizing type 09MnNiDR steel plate templates that width is 2600mm, by following quality hundred
The base that the component melting of point ratio forms 200mm thickness is produced.
C：0.07%, Si：0.20%, Mn：1.35%, P：0.018%, S：0.005%, Alt：0.020%, Ni：0.30%, Nb：
0.016%, balance of Fe and micro inevitable impurity.
Concretely comprise the following steps：
（1）Obtained continuous casting billet is heated in continuous oven, heating-up temperature is 1230 DEG C, total heat time is 200min, soaking
Time is 40min, it is ensured that heating steel billet is uniform.
（2）In rolling process, using I-stage high temperature rolling, carried out using finishing mill single chassis, roll neck 1020mm, open rolling
Temperature is 1050 DEG C, finishing temperature is 850 DEG C, and preceding 5 passage overall reductions reach 88%, and last 2 passages are used as planishing pass
To control plate shape.
（3）During steel plate roller repairing, ACC coolings are not carried out, steel plate passes through ACC cooling systems with the roller speed of 2.5m/s
System.
（4）In operation is aligned, straightening temperature is 400 DEG C, and straightener inlet roll gap is 2mm, small one and large one straightening force point
Wei not 300t and 200t.
（5）Heat treatment step, normalizing temperature is 870 DEG C, and total heat time is 40min.
1 is see the table below using the mechanical property and unevenness of this method gained normalizing type 09MnNiDR steel plates.
Embodiment 2
Thickness is 9mm, the control process of the normalizing type Q345R steel plate templates that width is 2900mm, by following quality percentage
The base that the component melting of ratio forms 200mm thickness is produced.
C：0.16%, Si：0.34%, Mn：1.38%, P：0.015%, S：0.006%, Alt：0.046%, balance of Fe and micro
Inevitable impurity.
Concretely comprise the following steps：
（1）Obtained continuous casting billet is heated in continuous oven, heating-up temperature is 1241 DEG C, total heat time is 200min, soaking
Time is 45min, it is ensured that heating steel billet is uniform.
（2）In rolling process, using I-stage high temperature rolling, carried out using finishing mill single chassis, roll neck 1120mm, open rolling
Temperature is 1095 DEG C, finishing temperature is 890 DEG C, and preceding 5 passage overall reductions reach 90%, and last 2 passages are used as planishing pass
To control plate shape.
（3）During steel plate roller repairing, ACC coolings are carried out, ACC opens rapid cooling 1,3 systems, upper and lower water-cooled water ratio in advance
It is 1：1.3, steel plate is with the roller speed of 2.0m/s quickly through water-cooled ACC system.
（4）In operation is aligned, straightening temperature is 580 DEG C, and actual roll gap is 4mm, and small one and large one straightening force is respectively
300t and 210t.
（5）Heat treatment step, normalizing temperature is 850 DEG C, and total heat time is 45min.
1 is see the table below using the mechanical property and unevenness of this method gained normalizing type Q345R steel plates.
Embodiment 3
Thickness is 12mm, the control process of the normalizing type SA516Gr70 steel plate templates that width is 3100mm, by following quality
The base that the component melting of percentage forms 200mm thickness is produced.
C：0.18%, Si：0.32%, Mn：1.28%, P：0.010%, S：0.009%, Alt：0.050%, balance of Fe and micro
Inevitable impurity.
Concretely comprise the following steps：
（1）Obtained continuous casting billet is heated in continuous oven, heating-up temperature is 1250 DEG C, total heat time is 220min, soaking
Time is 50min, it is ensured that heating steel billet is uniform.
（2）In rolling process, using I-stage high temperature rolling, carried out using finishing mill single chassis, roll neck is opened in 1100mm
Temperature is rolled for 1100 DEG C, finishing temperature are 885 DEG C, and preceding 6 passage overall reductions reach 85%, and last 2 passages are used as smooth road
It is secondary controlling plate shape.
（3）During steel plate roller repairing, ACC coolings are carried out, ACC opens rapid cooling 1,3 systems, upper and lower water-cooled water ratio in advance
It is 1：1.1, steel plate is with the roller speed of 2.0m/s quickly through water-cooled ACC system.
（4）In operation is aligned, straightening temperature is 650 DEG C, and actual roll gap is 8mm, and small one and large one straightening force is respectively
300t and 240t.
（5）Heat treatment step, normalizing temperature is 870 DEG C, and total heat time is 50min.
1 is see the table below using the mechanical property and unevenness of this method gained normalizing type SA516Gr70 steel plates.
Embodiment 4
Thickness is 15mm, the control process of the normalizing type Q345D steel plate templates that width is 2850mm, by following quality percentage
The base that the component melting of ratio forms 210mm thickness is produced.
C：0.17%, Si：0.40%, Mn：1.50%, P：0.018%, S：0.011%, Alt：0.046%, balance of Fe and micro
Inevitable impurity.
Concretely comprise the following steps：
（1）Obtained continuous casting billet is heated in continuous oven, heating-up temperature is 1233 DEG C, total heat time is 250min, soaking
Time is 65min, it is ensured that heating steel billet is uniform.
（2）In rolling process, using I-stage high temperature rolling, carried out using finishing mill single chassis, roll neck is opened in 1080mm
Temperature is rolled for 1080 DEG C, finishing temperature are 900 DEG C, and preceding 7 passage overall reductions reach 92%, and last 2 passages are used as smooth road
It is secondary controlling plate shape.
（3）During steel plate roller repairing, ACC coolings are carried out, ACC closes rapid cooling 1,3 systems, upper and lower water-cooled water ratio in advance
It is 1：1.4, steel plate is with the roller speed of 1.8m/s quickly through water-cooled ACC system.
（4）In operation is aligned, straightening temperature is 750 DEG C, and actual roll gap is 10mm, and small one and large one straightening force is respectively
300t and 250t.
（5）Heat treatment step, normalizing temperature is 870 DEG C, and total heat time is 60min.
1 is see the table below using the mechanical property and unevenness of this method gained normalizing type Q345D steel plates.
The mechanical property of table 1 and unevenness
Above example is only used to illustrative and not limiting technical scheme, although entering to the present invention with reference to above-described embodiment
Go detailed description, it will be understood by those within the art that：The present invention can still be modified or equally replaced
Change, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover will in right of the invention
Ask in the middle of scope.
Claims (9)
1. it is a kind of control normalizing type thin specification steel plate template production method, including heating of plate blank, rolling, roller repairing, aligning,
Heat treatment step, it is characterised in that the rolling process, using I-stage high temperature rolling technique, start rolling temperature is 1050~1100
DEG C, finishing temperature be 850~900 DEG C.
2. it is according to claim 1 it is a kind of control normalizing type thin specification steel plate template process, it is characterised in that institute
Heating of plate blank operation is stated, slab is heated in continuous oven, heating-up temperature is 1230~1250 DEG C, total heat time >=10min/cm
× h, soaking time >=2min/cm × h, h is thickness of strand, and unit is cm.
3. it is according to claim 1 it is a kind of control normalizing type thin specification steel plate template process, it is characterised in that institute
State rolling process, preceding several passage overall reductions reach 85~92%, last 2 passages are as planishing pass controlling plate shape.
4. it is according to claim 1 it is a kind of control normalizing type thin specification steel plate template process, it is characterised in that institute
Roller repairing operation is stated, as H ＜ 8mm, ACC coolings is not carried out, that is, rapid cooling 1,3 systems are closed after rolling, steel plate is with the roller of 2.5m/s
Speed passes through ACC cooling systems；When H is 8~15mm, carries out ACC coolings, i.e. ACC and open rapid cooling 1,3 systems in advance, using 1.8
The roller speed of~2.0m/s, it is ensured that steel plate is quickly through water-cooled ACC system；The H is steel plate finished product mm of thickness.
5. it is according to claim 1 it is a kind of control normalizing type thin specification steel plate template process, it is characterised in that institute
Aligning operation is stated, at least twice aligning is carried out all over small one and large one two kinds of straightening forces according to every.
6. it is according to claim 1 it is a kind of control normalizing type thin specification steel plate template process, it is characterised in that institute
Technology for Heating Processing is stated, is completed by normalized treatment, normalizing temperature is 850~870 DEG C, total heat time is 40~60min.
7. the process of a kind of control normalizing type thin specification steel plate template according to claim 1-6 any one, its
It is characterised by, the rolling process, is rolled using finishing mill single chassis, the plain-barreled roll using roll neck between 1020~1120mm,
Setting road number of times 7~9 road.
8. the process of a kind of control normalizing type thin specification steel plate template according to claim 1-6 any one, its
Be characterised by, described roller repairing operation, for finished product thickness in the range of 8~15mm steel plate, as D ＜ 3000mm, up and down
Water-cooled water ratio is 1：（1.3~1.4）；As D >=3000mm, upper and lower water-cooled water ratio is 1：（1.1~1.2）；The D is steel plate finished product
Mm in width.
9. the process of a kind of control normalizing type thin specification steel plate template according to claim 1-6 any one, its
Be characterised by, the aligning operation, straightening temperature be 400~750 DEG C, straightener inlet roll gap be steel plate thickness-（4~5）Mm,
Straightening force is between 200~300t.
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| CN201611096096.1A CN106734317B (en) | 2016-12-02 | 2016-12-02 | A kind of production method for controlling normalizing type thin specification steel plate template |
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| CN201611096096.1A CN106734317B (en) | 2016-12-02 | 2016-12-02 | A kind of production method for controlling normalizing type thin specification steel plate template |
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| CN106734317B CN106734317B (en) | 2018-04-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108273854A (en) * | 2017-12-25 | 2018-07-13 | 南京钢铁股份有限公司 | A kind of single chassis heavy and medium plate mill nose control method |
| CN109550810A (en) * | 2017-09-27 | 2019-04-02 | 鞍钢股份有限公司 | Straightening method for improving shape of thin-specification cold-control steel plate |
| CN112226596A (en) * | 2020-09-15 | 2021-01-15 | 舞阳钢铁有限责任公司 | Method for reducing plate shape defects of steel ingot finished Cr-Mo steel plate |
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| JPH1112657A (en) * | 1997-06-25 | 1999-01-19 | Sumitomo Metal Ind Ltd | Manufacture of ti added hot rolled high tensile steel plate having excellent formability |
| JP2001288511A (en) * | 2000-03-31 | 2001-10-19 | Nippon Steel Corp | MANUFACTURING METHOD OF THICK STEEL PLATE WITH THICKNESS OF >=25 MM AND TENSILE STRENGTH OF 400 N/mm2 |
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| CN103540865A (en) * | 2013-11-12 | 2014-01-29 | 湖南华菱湘潭钢铁有限公司 | Production method of tempered high-strength Q620D super-thick steel plate |
| CN103627868A (en) * | 2013-11-29 | 2014-03-12 | 内蒙古包钢钢联股份有限公司 | Production method for improving toughness of 10-12mm thick steel plate with yield strength of 345MPa grade |
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|---|---|---|---|---|
| JPH1112657A (en) * | 1997-06-25 | 1999-01-19 | Sumitomo Metal Ind Ltd | Manufacture of ti added hot rolled high tensile steel plate having excellent formability |
| JP2001288511A (en) * | 2000-03-31 | 2001-10-19 | Nippon Steel Corp | MANUFACTURING METHOD OF THICK STEEL PLATE WITH THICKNESS OF >=25 MM AND TENSILE STRENGTH OF 400 N/mm2 |
| CN101845593A (en) * | 2010-05-19 | 2010-09-29 | 首钢总公司 | Steel for 20 control Cr nuclear power and production method thereof |
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| CN103540865A (en) * | 2013-11-12 | 2014-01-29 | 湖南华菱湘潭钢铁有限公司 | Production method of tempered high-strength Q620D super-thick steel plate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109550810A (en) * | 2017-09-27 | 2019-04-02 | 鞍钢股份有限公司 | Straightening method for improving shape of thin-specification cold-control steel plate |
| CN108273854A (en) * | 2017-12-25 | 2018-07-13 | 南京钢铁股份有限公司 | A kind of single chassis heavy and medium plate mill nose control method |
| CN112226596A (en) * | 2020-09-15 | 2021-01-15 | 舞阳钢铁有限责任公司 | Method for reducing plate shape defects of steel ingot finished Cr-Mo steel plate |
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| Publication number | Publication date |
|---|---|
| CN106734317B (en) | 2018-04-10 |
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