CN106734317B - A kind of production method for controlling normalizing type thin specification steel plate template - Google Patents
A kind of production method for controlling normalizing type thin specification steel plate template Download PDFInfo
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- CN106734317B CN106734317B CN201611096096.1A CN201611096096A CN106734317B CN 106734317 B CN106734317 B CN 106734317B CN 201611096096 A CN201611096096 A CN 201611096096A CN 106734317 B CN106734317 B CN 106734317B
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- 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
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- 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
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
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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
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- 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 for controlling 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 scientifically and rationally distributing the technological parameters such as heating steel billet, rolling, cooling, aligning, heat treatment.
Description
Technical field
The present invention relates to hot rolled plate technology field, and normalizing type thin specification steel plate template is controlled more particularly, to one kind
Production method.
Background technology
In recent years, as the development that engineering manufactures, thickness are increasing in the demand of 6~15mm thin specification steel plates.But
This kind of thin specification steel plate is raw due to the features such as raw material base is small, rolling temperature drop is fast, more sensitive, hardness is high to temperature change be present
During production 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 with rate height, properties percent of pass is relatively low, causes not can manufacture, has had a strong impact on the country
The production of thin plate and the market demand.
In addition, domestic most steel plate factories when producing this kind of thin specification steel plate, by capacity of equipment, technology and operate 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 in production process
Heating-up temperature, rolling procedure, equipment control ability and process operation level etc. propose higher requirement, therefore this kind of steel plate
The research of Strip Shape Control technology seems most important and urgent.
The content of the invention
The present invention provides a kind of process for controlling normalizing type thin specification steel plate template, 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 ensure that steel plate has good surface quality, stabilize performance, reach the ability that can be mass.
It is a kind of control normalizing type thin specification steel plate template production method, including heating of plate blank, rolling, roller repairing, rectify
Directly, 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, the roller repairing process, as H ＜ 8mm, cool down without ACC, that is, closed after rolling
Rapid cooling 1,3 systems are closed, steel plate passes through ACC cooling systems with 2.5m/s roller speed；When H is 8~15mm, ACC coolings are carried out, i.e.,
ACC opens rapid cooling 1,3 systems in advance, using 1.8~2.0m/s roller speed, it is ensured that steel plate is quickly through water cooling ACC system；It is described
H is steel plate finished product mm of thickness.
The process of above-mentioned control normalizing type thin specification steel plate template, the heating of plate blank process, slab is in continuous oven
Interior heating, heating-up temperature are 1230~1250 DEG C, total heat time >=10min/cm × h, soaking time >=2min/cm × h, h
For thickness of strand, unit cm, ensure that heating steel billet is uniform.
The process of above-mentioned control normalizing type thin specification steel plate template, the rolling process, under preceding several passage stagnation pressures
Amount reaches 85~92%, and last 2 passages are as planishing pass to control plate shape.
The process of above-mentioned control normalizing type thin specification steel plate template, the Technology for Heating Processing are complete by normalized treatment
Into, normalizing temperature is 850~870 DEG C, and total heat time is 40~60min, ensures that N gas shieldeds play respective action in stove, with
The generation of surface of steel plate iron scale is reduced, that is, is not required to the processing such as ball blast with regard to delivery requirements can be met.
The process of above-mentioned control normalizing type thin specification steel plate template, the rolling process, using finishing mill single chassis
Rolling, using plain-barreled roll of the roll neck between 1020~1120mm, set road number 7~9.
It is a kind of control normalizing type thin specification steel plate template production method, including heating of plate blank, rolling, roller repairing, rectify
Directly, 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, the aligning process, at least two are carried out all over small one and large one two kinds of straightening forces according to every
All over aligning.
The process of above-mentioned control normalizing type thin specification steel plate template, the rolling process, using finishing mill single chassis
Rolling, using plain-barreled roll of the roll neck between 1020~1120mm, set road number 7~9.
The process of above-mentioned control normalizing type thin specification steel plate template, the aligning process, straightening temperature be 400~
750 DEG C, straightener inlet roll gap be steel plate thickness-（4~5）Mm, straightening force is between 200~300t.
It is a kind of control normalizing type thin specification steel plate template production method, including heating of plate blank, rolling, roller repairing, rectify
Directly, 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, described roller repairing process, for finished product thickness in the range of 8~15mm steel
Plate, as D ＜ 3000mm, upper and lower water cooling water ratio is 1：（1.3~1.4）；As D >=3000mm, upper and lower water cooling water ratio is 1：（1.1~
1.2）；The D is steel plate finished product mm in width.
The process of above-mentioned control normalizing type thin specification steel plate template, the aligning process, 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, select 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
Every meter of unevenness of any direction is within 5mm, and every 2 meters of unevenness are within 6mm.
The present invention is applied to the production that plate shape requires the thin specification steel plate of higher heat treatment class, steel plate thickness 6~
In the range of 15mm.
It is using beneficial effect caused by above-mentioned technical proposal：1st, by control method of the present invention prepare heat at
The thin specification steel plate of reason 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 it is achieved by the method control 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, production cost is low, and the market competitiveness is strong, meets the growing market demand.
Embodiment
The present invention is described in further details with reference to embodiment：
Embodiment 1
The control process for the normalizing type 09MnNiDR steel plate templates that thickness is 6mm, width is 2600mm, by following matter
The component melting of amount percentage is produced into the base of 200mm thickness.
C：0.07%, Si：0.20%, Mn：1.35%, P：0.018%, S：0.005%, Alt：0.020%, Ni：0.30%, Nb：
0.016%, surplus is 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, and total heat time is 200min,
Soaking time is 40min, ensures 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 as planishing pass
To control plate shape.
（3）During steel plate roller repairing, cooled down without ACC, steel plate passes through ACC cooling systems with 2.5m/s roller speed
System.
（4）In process is aligned, straightening temperature is 400 DEG C, and straightener inlet roll gap is 2mm, and small one and large one straightening force is divided
Wei not 300t and 200t.
（5）Heat treatment step, normalizing temperature are 870 DEG C, and total heat time is 40min.
1 is see the table below using the mechanical property and unevenness of normalizing type 09MnNiDR steel plates obtained by this method.
Embodiment 2
The control process for the normalizing type Q345R steel plate templates that thickness is 9mm, width is 2900mm, by following quality
The component melting of percentage is produced into the base of 200mm thickness.
C：0.16%, Si：0.34%, Mn：1.38%, P：0.015%, S：0.006%, Alt：0.046%, surplus is 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, and total heat time is 200min,
Soaking time is 45min, ensures 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 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 cooling water ratio in advance
For 1：1.3, steel plate is with 2.0m/s roller speed quickly through water cooling ACC system.
（4）In process 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 are 850 DEG C, and total heat time is 45min.
1 is see the table below using the mechanical property and unevenness of normalizing type Q345R steel plates obtained by this method.
Embodiment 3
The control process for the normalizing type SA516Gr70 steel plate templates that thickness is 12mm, width is 3100mm, by following
The component melting of mass percent is produced into the base of 200mm thickness.
C：0.18%, Si：0.32%, Mn：1.28%, P：0.010%, S：0.009%, Alt：0.050%, surplus is 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, and total heat time is 220min,
Soaking time is 50min, ensures 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
Roll temperature be 1100 DEG C, finishing temperature be 885 DEG C, preceding 6 passage overall reductions reach 85%, and last 2 passages are as smooth road
It is secondary 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 cooling water ratio in advance
For 1：1.1, steel plate is with 2.0m/s roller speed quickly through water cooling ACC system.
（4）In process 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 are 870 DEG C, and total heat time is 50min.
1 is see the table below using the mechanical property and unevenness of normalizing type SA516Gr70 steel plates obtained by this method.
Embodiment 4
The control process for the normalizing type Q345D steel plate templates that thickness is 15mm, width is 2850mm, by following quality
The component melting of percentage is produced into the base of 210mm thickness.
C：0.17%, Si：0.40%, Mn：1.50%, P：0.018%, S：0.011%, Alt：0.046%, surplus is 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, and total heat time is 250min,
Soaking time is 65min, ensures 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
Roll temperature be 1080 DEG C, finishing temperature be 900 DEG C, preceding 7 passage overall reductions reach 92%, and last 2 passages are as smooth road
It is secondary to control plate shape.
（3）During steel plate roller repairing, ACC coolings are carried out, ACC closes rapid cooling 1,3 systems, upper and lower water cooling water ratio in advance
For 1：1.4, steel plate is with 1.8m/s roller speed quickly through water cooling ACC system.
（4）In process 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 are 870 DEG C, and total heat time is 60min.
1 is see the table below using the mechanical property and unevenness of normalizing type Q345D steel plates obtained by this method.
The mechanical property of table 1 and unevenness
Above example is only to illustrative and not limiting technical scheme, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that：Still the present invention can be modified or be waited
With replacing, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover the power in the present invention
Among sharp claimed range.
Claims (10)
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, the roller repairing process, as H ＜ 8mm, cool down, that is, closed after rolling fast without ACC
Cold 1,3 systems, steel plate pass through ACC cooling systems with 2.5m/s roller speed；When H is 8~15mm, ACC coolings, i.e. ACC are carried out
Rapid cooling 1,3 systems are opened in advance, using 1.8~2.0m/s roller speed, it is ensured that steel plate is quickly through water cooling ACC system；The H is
Steel plate finished product mm of thickness.
A kind of 2. process for controlling normalizing type thin specification steel plate template according to claim 1, it is characterised in that institute
Heating of plate blank process is stated, slab heats in continuous oven, and heating-up temperature is 1230~1250 DEG C, total heat time >=10min/cm
× h, soaking time >=2min/cm × h, h are thickness of strand, unit cm.
A kind of 3. process for controlling normalizing type thin specification steel plate template according to claim 1, it is characterised in that institute
State rolling process, preceding several passage overall reductions reach 85~92%, and last 2 passages are as planishing pass to control plate shape.
A kind of 4. process for controlling normalizing type thin specification steel plate template according to claim 1, it is characterised in that institute
Technology for Heating Processing is stated, is completed by normalized treatment, normalizing temperature is 850~870 DEG C, and total heat time is 40~60min.
5. a kind of process of control normalizing type thin specification steel plate template according to claim 1-4 any one, its
It is characterised by, the rolling process, is rolled using finishing mill single chassis, using plain-barreled roll of the roll neck between 1020~1120mm,
Set road number 7~9.
6. 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, the aligning process, carry out at least twice according to every all over small one and large one two kinds of straightening forces and rectify
Directly.
A kind of 7. process for controlling normalizing type thin specification steel plate template according to claim 6, it is characterised in that institute
Rolling process is stated, is rolled using finishing mill single chassis, using plain-barreled roll of the roll neck between 1020~1120mm, sets road number 7
~9.
8. a kind of process of control normalizing type thin specification steel plate template according to claim 6 or 7, its feature exist
In, the aligning process, straightening temperature is 400~750 DEG C, straightener inlet roll gap be steel plate thickness-（4~5）Mm, straightening force
Between 200~300t.
9. 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, described roller repairing process, for finished product thickness in the range of 8~15mm steel plate, when
D ＜ 3000mm, upper and lower water cooling water ratio are 1：（1.3~1.4）；As D >=3000mm, upper and lower water cooling water ratio is 1：（1.1~1.2）；
The D is steel plate finished product mm in width.
A kind of 10. process for controlling normalizing type thin specification steel plate template according to claim 9, it is characterised in that
The aligning process, straightening temperature be 400~750 DEG C, straightener inlet roll gap be steel plate thickness-（4~5）Mm, straightening force exist
Between 200~300t.
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| 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 |
| CN108273854B (en) * | 2017-12-25 | 2020-04-21 | 南京钢铁股份有限公司 | Method for controlling head warping of single-stand heavy and medium plate mill |
| CN112226596B (en) * | 2020-09-15 | 2022-04-05 | 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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| JP3275783B2 (en) * | 1997-06-25 | 2002-04-22 | 住友金属工業株式会社 | Method for producing Ti-added hot-rolled high-strength steel sheet excellent in 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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| CN103627868B (en) * | 2013-11-29 | 2016-01-13 | 内蒙古包钢钢联股份有限公司 | Improve the production method of yield strength 345MPa level 10 ~ 12mm Plate Steel toughness |
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