CN106350645B - A kind of press quenching of water power Wide and Thick Slab and Strip Shape Control technique - Google Patents
A kind of press quenching of water power Wide and Thick Slab and Strip Shape Control technique Download PDFInfo
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- CN106350645B CN106350645B CN201610700495.8A CN201610700495A CN106350645B CN 106350645 B CN106350645 B CN 106350645B CN 201610700495 A CN201610700495 A CN 201610700495A CN 106350645 B CN106350645 B CN 106350645B
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- 238000010791 quenching Methods 0.000 title claims abstract description 63
- 230000000171 quenching Effects 0.000 title claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000001816 cooling Methods 0.000 claims abstract description 95
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 79
- 239000010959 steel Substances 0.000 claims abstract description 79
- 238000002347 injection Methods 0.000 claims abstract description 51
- 239000007924 injection Substances 0.000 claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims description 17
- 238000003801 milling Methods 0.000 claims description 13
- 238000002791 soaking Methods 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 230000000903 blocking Effects 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 abstract description 6
- 238000005496 tempering Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000001360 synchronised Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000000051 modifying Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000001519 tissues Anatomy 0.000 description 1
- 230000001131 transforming Effects 0.000 description 1
Classifications
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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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
-
- 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
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for cooling
-
- 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
-
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- 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
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
Abstract
The present invention is a kind of press quenching of water power Wide and Thick Slab and Strip Shape Control technique, the technique carries out jet stream for unit with " positive injection+forward direction injection+contra-injection " and cools down press quenching, while jet impulse region cooling water and surface of steel plate exchange heat, most cooling waters are limited in the jet impulse region that " positive injection+forward direction injection+contra-injection " is unit.Thickness specification according to water power (width) slab is classified, and is selected and is cooled down press quenching by formula cooling or swing type, realizes cooling water and the heat exchange efficiency of steel plate maximum, and obtain good coldplate shape.The present invention ensures that press quenching steel plate leads to the temperature uniformity of plate, and water power is transplanted to online production with (width) slab out-line quenching, while production procedure is simplified, production cost reduces, saves heat-treatment production line resource, shortens delivery cycle.
Description
Technical field
It is specifically a kind of based on inclination spray the present invention relates to a kind of press quenching of Wide and Thick Slab and Strip Shape Control technique
The press quenching of fluidics water power Wide and Thick Slab and Strip Shape Control technique.
Background technology
Cut deal roller repairing technology provides process window for steel grade tissue modulation, is played in product development process huge
Big effect.With the active demand of advanced steel product exploitation and the development trend of short route process production steel grade, jet stream
The cooling technology of impingement heat transfer highlights advantage.But in current country's single chassis or Stand Mill/Heavy Plate Rolling Line arrangement inclination spray
Jet stream cooling device is less, mostly tilts DQ sections+laminar flow of injection stream with Areoponics culture, section cooling, encryption section cooling, single frame
Based on cooling device.
Rely on Areoponics culture, cooling facility for laminar flow, it is domestic it is a plurality of in/Heavy Plate Rolling Line carried out press quenching steel plate
Production.The Chinese patent application (application No. is 200810013604.4) of 2008 discloses " a kind of high toughness thick steel plate
Press quenching manufacturing technique method ", the invention use steam fog and the water curtain two benches type of cooling, and production finished product thickness is 20-
The high-strength and high ductility steel plate of 50mm, cooling zone average cooling rate are 25-45 DEG C/s, and cooling termination temperature is 150-300 DEG C.2009
The Chinese patent application (application No. is 200810196040.2) in year discloses " the high-strength quenched and tempered steel of steekle mill press quenching production
Technique ", for the invention using the columnar laminar flow cooling device of U-shaped upper header and straight tube lower collector pipe, production thickness is 12-35mm's
High-strength quenched and tempered steel, minimum cooldown rate be 15 DEG C/s, 150-300 DEG C of cooling termination temperature；Temperature correction and cold strong guarantor are used after cooling
It is wide that steel plate unevenness before the offline tempering of card reaches the full plates of 8-10mm/, increases process cost；For more than 35mm thickness steel
Press quenching cooling is not implemented in plate.The Chinese patent application (application No. is 200910091825.8) of 2010 discloses " a kind of
It is suitble to the direct quenching technique of different-thickness high strength steel plate ", the invention realizes that steel plate is quenched online using high density section cooling
Fire, section cooling are made of the cooling zone that upper stream collector and lower spray header form, and press quenching steel plate thickness is 1-50mm；
Different-thickness steel plate is being 25-45 DEG C/s by cooling zone average cooling rate, and cooling termination temperature is down to less than 450 DEG C.On
The section cooling or Water Curtain Cooling Device of Chinese patent use are stated, does not refer to water temperature, under different water temperature conditions, cooling water
It is different from the exchange capability of heat of steel plate, realize the cooling technique parameter (cooling manifold flow, roller speed, water ratio etc.) of steel plate press quenching
There is larger difference, the control of press quenching steel-plate shape has great difficulty；And for whether use passes through formula cooling, above-mentioned patent
It does not illustrate.When being cooled down using above-mentioned Curtain laminar cooling device and columnar laminar flow cooling device, steam film is broken up
Range is only limitted to the regional area immediately below solid stream of water, cold since steam film exists between other region steel plates and cooling water
Less efficient, the flowing space of old cooling water is big, flow direction is more, is unfavorable for cooling Strip Shape Control, is existed using above-mentioned cooling device
Water temperature and the type of cooling when line quenches also do not refer to.
Invention content
The technical problems to be solved by the invention are, how by press quenching and Strip Shape Control technique, to make water power wide
After slab carries out press quenching, steel plate unevenness hereinafter, later process need not carry out cold leveling or pressing, meets back in 8mm/m
Stove requires the plate shape for entering stove steel plate.
The present invention solve more than technical problem technical solution be：
A kind of press quenching of water power Wide and Thick Slab and Strip Shape Control technique, the cloth successively on single chassis Heavy Plate Rolling Line
It puts heating furnace, De-scaling box, milling train, pre-straightening machine, tilt jet flow cooling system；The inclination jet flow cooling system is equipped with 24
Group cooling manifold, 24 groups of cooling manifolds are set by steel plate traffic direction time interval, and every group of cooling manifold all includes upper collection
Pipe and lower collector pipe；
Blank cold charge sets 3 heating zones, and preheating zone is followed successively by from heating furnace steel loading side to tapping side, 1st area of heating, is added
(its length is respectively 20.65m, 8.85m, 8.85m, 8.85m, 11.8m, from preheating zone always for hot 2nd area, 3rd area of heating, soaking zone
To soaking zone, by Combustion System, furnace gas temperature is stepped up, and is finally reached the requirement of blank tapping temperature.), heat 1 area's furnace gas
700-1000 DEG C of temperature heats 2 1050-1170 DEG C of area's furnace gas temperatures, heats 3 1180-1230 DEG C of area's furnace gas temperatures, soaking zone stove
1180-1220 DEG C of temperature degree, soaking time >=45min, time inside furnace 240-300min, 1160-1200 DEG C of mean temperature of coming out of the stove；
Using two-phase control rolling, workpiece thickness is 2-2.5 times of finished product thickness, 820-860 DEG C of finish rolling finishing temperature.
After rolling, steel plate enters pre-straightening machine aligning, and in the inclination injection stream cooling for including 24 groups of cooling manifolds
The jet stream that " positive injection+forward direction injection+contra-injection " is carried out in system as unit cools down press quenching；Cooled region roller-way speed
Spend 0.4-0.65m/s, roll table accelerating 0.002-0.005m/s2, enter 765-810 DEG C of coolant-temperature gage, 150-280 DEG C of final cooling temperature,
17-25 DEG C of cooling zone average cooling rate/s；
The 4th group of 1- for tilting jet flow cooling system is set as gap nozzle collector, the lumen of every group of upper header and side
Chamber is disposed as an individual flow controlling unit, and the lumen and side chamber of every group of lower collector pipe are disposed as an individual flow
Control unit；The 24th group of 5- is set as highly dense spray header, and the lumen of every two groups of upper headers is set as an individual flow
Control unit, every two groups of upper header sides chamber are set as an individual flow controlling unit, and every group of lower collector pipe is set as a list
Only flow controlling unit；Upper header lumen amounts to 14 flow controlling units, and upper header side chamber amounts to 14 flow control lists
Member, upper header amount to 28 flow controlling units, are 14 groups, carry out flow control to lumen and side chamber respectively；Under gap nozzle
Collector lumen amounts to 4 flow controlling units, and gap nozzle next part tube edge chamber amounts to 4 flow controlling units, under highly dense nozzle
Collector amounts to 20 flow controlling units, and lower collector pipe amounts to 28 flow controlling units, 14 groups is defined as, respectively to gap nozzle
Lower collector pipe lumen and side chamber and the full cavity of highly dense nozzle lower collector pipe carry out flow control；Gap collector is all provided on the 4th group of 1-
Be set to positive injection, the 5th group of highly dense upper header is set as contra-injection, the 6th, the 7th, the 9th, the 10th, the 12nd, the 13rd group it is highly dense on
Collector is disposed as positive injection, and the 8th, the 11st, the 14th group of highly dense upper header is disposed as contra-injection.
Involved in the present invention to gap nozzle collector and highly dense spray header be the common knowledge of this field, wherein stitching
Gap spray header refers to the collector equipped with opening degree, adjustable angle narrow slit type nozzle of spraying water, and highly dense spray header refers to nozzle plate
The upper collector equipped with the small nozzle of stainless steel.
Positive injection refers to that cooling flow injection direction is consistent with steel plate traffic direction, and inclines with steel plate into one in the present invention
Oblique angle, contra-injection refer to cool down flow injection direction and steel plate traffic direction on the contrary, and with steel plate into an inclination angle.
The technical solution that further limits of the present invention is：
The press quenching of aforementioned water power Wide and Thick Slab and Strip Shape Control technique use the water power of 34mm-40mm thickness
Wide and Thick Slab uses " positive injection+forward direction injection+contra-injection " online for the jet stream cooling of unit and by the formula type of cooling
Quenching；For the water power Wide and Thick Slab of more than 40mm thickness, " positive injection+forward direction injection+contra-injection " is used as unit
Jet stream cools down and swing type type of cooling press quenching.
The press quenching of aforementioned water power Wide and Thick Slab and Strip Shape Control technique, the 1st group of collector center line is in milling train
Heart line 79000mm, the 14th group of collector center line swing left limit 80000mm, swing right limit apart from milling train center line 97000mm
Position 96000mm；When water power is cooled down with Wide and Thick Slab using swing type, when steel plate head, which reaches, swings right limit, roller-way reversion, steel
Plate is run to milling train direction, and when steel plate tail, which reaches, swings left limit, roller-way rotates forward, and steel plate is run to far from milling train direction；
According to press quenching steel plate thickness and length, number of oscillations is set as 3 times, 5 times or 7 times.
The press quenching of aforementioned water power Wide and Thick Slab and Strip Shape Control technique, for being carried out using by the formula type of cooling
Press quenching, all collectors are opened, and the 4th group of gap upper header lumen flow control of 1- is 200-260m3/ h is the 5th group high
Close upper header lumen flow control is 500-600m3/ h, in subsequent jet impulse region, forward direction injection upper header lumen flow
Reduce 50-100m with contra-injection upper header lumen flow3/h；6th, the 7th group of highly dense upper header lumen flow control be
400-450m3/ h, the 8th group of highly dense upper header lumen flow control are 470-530m3Between/h, the 9th, the 10th group of highly dense upper header
Lumen flow control is 300-400m3/ h, the 11st group of highly dense upper header lumen flow control are 370-480m3/ h, the 12nd, the 13rd
The highly dense upper header lumen flow control of group is 300-400m3/ h, the 14th group of highly dense upper header lumen flow control are 370-480m3/
h；Ensure to keep slide plate shape while final cooling temperature.
The press quenching of aforementioned water power Wide and Thick Slab and Strip Shape Control technique, for being carried out using the swing type type of cooling
Press quenching, all collectors are opened, and the 4th group of gap upper header lumen flow control of 1- is 240-260m3/ h is the 5th group high
Close upper header lumen flow control is 550-600m3/ h, in subsequent jet impulse region, forward direction injection upper header lumen flow
It is equal, contra-injection upper header lumen flow is equal；6th, the 7th group of highly dense upper header lumen flow control is 300-
350m3/ h, the 8th group of highly dense upper header lumen flow control are 370-470m3/ h, the 9th, the 10th group of highly dense upper header lumen flow
It controls as 300-350m3/ h, the 11st group of highly dense upper header lumen flow control are 370-470m3/ h, the 12nd, the 13rd group it is highly dense on
The flow control of collector lumen is 300-350m3/ h, the 14th group of highly dense upper header lumen flow control are 370-470m3/h；Ensure eventually
Slide plate shape is kept while cold temperature.
The press quenching of aforementioned water power Wide and Thick Slab and Strip Shape Control technique pass through formula cooling or swing type for using
Cooling carries out the steel plate of press quenching, when width is more than 2730mm, carries out water Crown control, adjusts the side chamber of cooling upper header
Flow is the 30%-50% of lumen flow, ensures that steel plate width direction temperature is uniform.
The press quenching of aforementioned water power Wide and Thick Slab and Strip Shape Control technique, two segment frames are according to steel plate thickness into action
State adjusts, and 1# frame water blocking roll spacings are from upper surface of steel plate 10-50mm, and 2# frame upper header jet ports are apart from upper surface of steel plate
350mm makes steel plate upper and lower surface symmetrical cooling, is conducive to cool down Strip Shape Control.
The press quenching of aforementioned water power Wide and Thick Slab and Strip Shape Control technique, N610CF (N represents enterprise name code name,
610 represent tensile strength minimum values, and CF represents energy grade as low-welding crack-sensitive) the chemical composition weight of water power slab
Measuring percentage is：C：0.055-0.075%, Si：0.15-0.3%, Mn：1.35-1.46%, P：0-0.013%, S：0-0.003%,
Mo：0.07-0.12%, V：0.04-0.054%, Ti：0.007-0.03%, Ni：0.15-0.25%, Alt：0.01-0.04%, remaining
For Fe and inevitable impurity.
The press quenching of aforementioned water power Wide and Thick Slab and Strip Shape Control technique, N800CF (N represents enterprise name code name,
800 represent tensile strength minimum values, and CF represents energy grade as low-welding crack-sensitive) the chemical composition weight of water power slab
Measuring percentage is：C：0.075-0.094%, Si：0.25-0.35%, Mn：1.32-1.42%, P：0-0.013%, S：0-0.002%,
Cr：0.25-0.35%, Mo：0.35-0.45%, V：0.04-0.05%, Ti：0.012-0.02%, Ni：0.43-0.53%, Alt：
0.04-0.07%, remaining is Fe and inevitable impurity.
The press quenching of aforementioned water power Wide and Thick Slab and Strip Shape Control technique, it is raw using the blank of 260mm-265mm thickness
Finished product thickness is the water power Wide and Thick Slab of 34-56mm.
The beneficial effects of the invention are as follows：(1) the ability for tilting injection stream press quenching water power (width) slab is given full play to,
Out-line quenching is transplanted to online production, while production procedure is simplified, production cost reduces, saves heat-treatment production line
Resource shortens delivery cycle；(2) compared with offline production, the coolant-temperature gage that enters of press quenching water power (width) slab than goes out offline
Furnace temperature is lower, and roller speed during press quenching is faster than the roller speed of out-line quenching, eliminates ball blast process, reheating operation, reduces
Water consume；(3) the unevenness of press quenching water power (width) slab is less than 8mm/m, eliminates cold leveling or flattens process, meets
Tempering furnace requires the plate shape for entering stove steel plate；(4) the press quenching of water power (width) slab is realized on rolling line, extends to it
His offline quenched steel grade shortens the development cycle of other offline quenched steel grades, the quenched new product of fast responding market demand.
Description of the drawings
Fig. 1 is the arrangement schematic diagram of single chassis Wide and Thick Slab rolling line in the present invention.
In figure, 1-heating furnace, 2-De-scaling box, 3-5000mm, tetra- roll reversing rollers, 4-pre-straightening machine, 5-tilt and spray
Jet stream cooling system.
Specific embodiment
Embodiment 1
263 mm of the N610CF billet sizes × 1880mm × 3360mm of the present embodiment, rolled plate size 34.5mm ×
2715mm × 17662mm, the specific processing step of steel billet are as follows：
(1) the chemical component weight percentage of N610CF steel plates is：C：0.072, Si：0.2072, Mn：1.419 P：
0.0122, S：0.0012, Mo：0.0897, V：0.0451, Ti：0.0112, Ni：0.1673, Alt：0.033, remaining for Fe and
Inevitable impurity.
(2) blank cold charge, 331-424 DEG C of the preheating zone furnace gas temperature of heating furnace 1 heat 1 880-900 DEG C of area's furnace gas temperature,
2 1140-1160 DEG C of area's furnace gas temperatures are heated, heat 3 1215-1228 DEG C of area's furnace gas temperatures, soaking zone furnace gas temperature 1196-1203
DEG C, preheating zone time 76min heats 1 area time 42min, heats 2 area time 43min, heats 3 area time 53min, soaking zone
Time 72min, 1199 DEG C of mean temperature of coming out of the stove.
(3) blank, through 2 de-scaling of De-scaling box, carries out two-phase control rolling into milling train 3, rolls 11 altogether after heating furnace 1 goes out
It is secondary.Workpiece thickness 68mm, 1035 DEG C of roughing start rolling temperature, two open 873 DEG C of temperature, 836 DEG C of finishing temperature.After rolling,
Steel plate enters pre-straightening machine 4 and aligns, and is run to jet flow cooling system 5 is tilted.
(4) 1# mobility framework roll gap 85mm, 2# the mobility framework roll gap 385mm of jet flow cooling system are tilted, above and below steel plate
Surface is symmetrical, synchronous cooling.
(5) the 1st, the 2nd, the 3rd, the 4th group of gap upper header lumen flow is 240m3/ h, the 5th group of highly dense upper header lumen
Flow is 600m3/ h, the 6th, the 7th group of highly dense upper header lumen flow are 400m3/ h, the 8th group of highly dense upper header lumen flow are
470m3/ h, the 9th, the 10th group of highly dense upper header lumen flow are 300m3/ h, the 11st group of highly dense upper header lumen flow are 370m3/
H, the 12nd, the 13rd group of highly dense upper header lumen flow are 300m3/ h, the 14th group of highly dense upper header lumen flow are 370m3/ h, respectively
The water ratio of group collector is 1.8, roller speed 0.65m/s, 0.004 m/s of acceleration2, 20.84 DEG C of water temperature cools down using by formula.
(6) 796-773 DEG C of coolant-temperature gage, 249-263 DEG C of final cooling temperature entered, and cooling zone is averaged 22 DEG C/s of cooling rate.
(7) after press quenching, steel plate unevenness 8mm/m meets tempering furnace and the plate shape for entering stove steel plate is required.
Embodiment 2
The N610CF billet sizes 263mm × 1880mm × 3328mm of the present embodiment, rolled plate size 46.4mm ×
3002mm × 11520mm, the specific processing step of steel billet are as follows：
(1) the chemical component weight percentage of N610CF steel plates is：C：0.0747, Si：0.2123, Mn：1.356 P：
0.0122, S：0.0012, Mo：0.1094, V：0.0458, Ti：0.013, Ni：0.1881, Alt：0.03, remaining is Fe and can not
The impurity avoided.
(2) blank cold charge, 391-487 DEG C of the preheating zone furnace gas temperature of heating furnace 1 heat 1 880-900 DEG C of area's furnace gas temperature,
2 1130-1140 DEG C of area's furnace gas temperatures are heated, heat 3 1210-1220 DEG C of area's furnace gas temperatures, soaking zone furnace gas temperature 1190-1206
DEG C, preheating zone time 83min heats 1 area time 40min, heats 2 area time 44min, heats 3 area time 44min, soaking zone
Time 67min, 1197 DEG C of mean temperature of coming out of the stove.
(3) blank, through 2 de-scaling of De-scaling box, carries out two-phase control rolling into milling train 3, rolls 11 altogether after heating furnace 1 goes out
It is secondary.Workpiece thickness 92mm, 1021 DEG C of roughing start rolling temperature, two open 855 DEG C of temperature, 830 DEG C of finishing temperature.After rolling,
Steel plate enters pre-straightening machine 4 and aligns, and is run to jet flow cooling system 5 is tilted.
(4) 1# mobility framework roll gap 97mm, 2# the mobility framework roll gap 397mm of jet flow cooling system 5 are tilted, on steel plate
Lower surface is symmetrical, synchronous cooling.
(5) the 1st, the 2nd, the 3rd, the 4th group of gap upper header lumen flow is 260m3/ h, side chamber flow is 78m3/ h, the
5 groups of highly dense upper header lumen flows are 600m3/ h, side chamber flow are 180m3/ h, the 6th, the 7th group of highly dense upper header lumen flow are
400m3/ h, side chamber flow is 120m3/ h, the 8th group of highly dense upper header lumen flow are 470m3/ h, side chamber flow are 141m3/
H, the 9th, the 10th group of highly dense upper header lumen flow are 300m3/ h, side chamber flow is 90m3/ h, in the 11st group of highly dense upper header
Chamber flow is 370m3/ h, side chamber flow are 111m3/ h, the 12nd, the 13rd group of highly dense upper header lumen flow are 300m3/ h, side chamber
Flow is 90m3/ h, the 14th group of highly dense upper header lumen flow are 370m3/ h, side chamber flow are 111m3/ h, each group collector
Water ratio is 1.8, roller speed 0.5m/s, 20.84 DEG C of water temperature, is cooled down 3 times using swing type.
(6) 795-770 DEG C of coolant-temperature gage, 183-192 DEG C of final cooling temperature entered, and cooling zone is averaged 20 DEG C/s of cooling rate.
(7) after press quenching, steel plate unevenness 6mm/m meets tempering furnace and the plate shape for entering stove steel plate is required.
Embodiment 3
The N800CF billet sizes 260mm × 2370mm × 2757mm of the present embodiment, rolled plate size 55.2mm ×
3120mm × 9828mm, the specific processing step of steel billet are as follows：
(1) the chemical component weight percentage of N800CF steel plates is：C：0.0812, Si：0.2769, Mn：1.4029 P：
0.0116, S：0.0019, Cr：0.254, Mo：0.2708, V：0.0416, Ti：0.0149, Ni：0.4301, Alt：0.05, remaining
For Fe and inevitable impurity.
(2) blank cold charge, 400-456 DEG C of the preheating zone furnace gas temperature of heating furnace 1 heat 1 724-750 DEG C of area's furnace gas temperature,
2 1083-1120 DEG C of area's furnace gas temperatures are heated, heat 3 1190-1201 DEG C of area's furnace gas temperatures, soaking zone furnace gas temperature 1186-1203
DEG C, preheating zone time 81min heats 1 area time 31min, heats 2 area time 41min, heats 3 area time 42min, soaking zone
Time 52min, 1188 DEG C of mean temperature of coming out of the stove.
(3) blank, through 2 de-scaling of De-scaling box, carries out two-phase control rolling into milling train 3, rolls 11 altogether after heating furnace 1 goes out
It is secondary.Workpiece thickness 120mm, 1020 DEG C of roughing start rolling temperature, two open 850 DEG C of temperature, 838 DEG C of finishing temperature.After rolling,
Steel plate enters pre-straightening machine 4 and aligns, and is run to jet flow cooling system 5 is tilted.
(4) 1# mobility framework roll gap 105mm, 2# the mobility framework roll gap 405mm of jet flow cooling system 5 are tilted, on steel plate
Lower surface is symmetrical, synchronous cooling.
(5) the 1st, the 2nd, the 3rd, the 4th group of gap upper header lumen flow is 250m3/ h, side chamber flow is 87.5m3/ h,
5th group of highly dense upper header lumen flow is 560m3/ h, side chamber flow are 196m3/ h, the 6th, the 7th group of highly dense upper header lumen flow
For 330m3/ h, side chamber flow is 115.5m3/ h, the 8th group of highly dense upper header lumen flow are 450m3/ h, side chamber flow are
157.5m3/ h, the 9th, the 10th group of highly dense upper header lumen flow are 330m3/ h, side chamber flow is 115.5m3/ h is the 11st group high
Close upper header lumen flow is 450m3/ h, side chamber flow are 157.5m3/ h, the 12nd, the 13rd group of highly dense upper header lumen flow are
330m3/ h, side chamber flow is 115.5m3/ h, the 14th group of highly dense upper header lumen flow are 450m3/ h, side chamber flow are
157.5m3/ h, the water ratio of each group collector is 1.72, roller speed 0.5m/s, 17.97 DEG C of water temperature, is cooled down 5 times using swing type.
(6) 801-810 DEG C of coolant-temperature gage, 130-150 DEG C of final cooling temperature entered, and cooling zone is averaged 18 DEG C/s of cooling rate.
(7) after press quenching, steel plate unevenness 7mm/m meets tempering furnace and the plate shape for entering stove steel plate is required.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into technical solution, all fall within the present invention claims protection domain.
Claims (10)
1. a kind of press quenching of water power Wide and Thick Slab and Strip Shape Control technique, are sequentially arranged on single chassis Heavy Plate Rolling Line
Heating furnace, milling train, pre-straightening machine, tilts jet flow cooling system at De-scaling box, and the inclination jet flow cooling system is equipped with 24 groups
Cooling manifold, 24 groups of cooling manifolds are set by steel plate traffic direction time interval, and every group of cooling manifold all includes upper header
And lower collector pipe；
Blank cold charge sets 3 heating zones, and preheating zone, 1st area of heating, heating 2 are followed successively by from heating furnace steel loading side to tapping side
Area, 3rd area of heating, soaking zone, heat 1 700-1000 DEG C of area's furnace gas temperature, heat 2 1050-1170 DEG C of area's furnace gas temperatures, heating 3
1180-1230 DEG C of area's furnace gas temperature, 1180-1220 DEG C of soaking zone furnace gas temperature, soaking time >=45min, time inside furnace 240-
300min, 1160-1200 DEG C of mean temperature of coming out of the stove；
Using two-phase control rolling, workpiece thickness is 2-2.5 times of finished product thickness, 820-860 DEG C of finish rolling finishing temperature；
After rolling, steel plate enters pre-straightening machine aligning, and in the inclination jet flow cooling system for including 24 groups of cooling manifolds
The interior jet stream cooling press quenching for carrying out " positive injection+forward direction injection+contra-injection " as unit；Cooled region roller table speed
0.4-0.65m/s, roll table accelerating 0.002-0.005m/s2, enter 765-810 DEG C of coolant-temperature gage, 150-280 DEG C of final cooling temperature is cold
But 17-25 DEG C of area's average cooling rate/s；The positive injection refers to that cooling flow injection direction is consistent with steel plate traffic direction,
And with steel plate into an inclination angle, the contra-injection refers to cool down flow injection direction and steel plate traffic direction on the contrary, simultaneously and steel
Plate is into an inclination angle；
It is characterized in that：
The 4th group of the 1- for tilting jet flow cooling system is set as gap nozzle collector, the lumen of every group of upper header and side
Chamber is disposed as an individual flow controlling unit, and the lumen and side chamber of every group of lower collector pipe are disposed as an individual flow
Control unit；The 24th group of 5- is set as highly dense spray header, and the lumen of every two groups of upper headers is set as an individual flow
Control unit, every two groups of upper header sides chamber are set as an individual flow controlling unit, and every group of lower collector pipe is set as a list
Only flow controlling unit；Upper header lumen amounts to 14 flow controlling units, and upper header side chamber amounts to 14 flow control lists
Member, upper header amount to 28 flow controlling units, are 14 groups, carry out flow control to lumen and side chamber respectively；Under gap nozzle
Collector lumen amounts to 4 flow controlling units, and gap nozzle next part tube edge chamber amounts to 4 flow controlling units, under highly dense nozzle
Collector amounts to 20 flow controlling units, and lower collector pipe amounts to 28 flow controlling units, 14 groups is defined as, respectively to gap nozzle
Lower collector pipe lumen and side chamber and the full cavity of highly dense nozzle lower collector pipe carry out flow control；Gap collector is all provided on the 4th group of 1-
Be set to positive injection, the 5th group of highly dense upper header is set as contra-injection, the 6th, the 7th, the 9th, the 10th, the 12nd, the 13rd group it is highly dense on
Collector is disposed as positive injection, and the 8th, the 11st, the 14th group of highly dense upper header is disposed as contra-injection.
2. the press quenching of water power Wide and Thick Slab according to claim 1 and Strip Shape Control technique, spy are：For
The water power Wide and Thick Slab of 34mm-40mm thickness uses " positive injection+forward direction injection+contra-injection " to be cooled down for the jet stream of unit
And pass through formula type of cooling press quenching；For the water power Wide and Thick Slab of more than 40mm thickness, using " positive injection+forward direction
Jet stream cooling and swing type type of cooling press quenching of the injection+contra-injection " for unit.
3. the press quenching of water power Wide and Thick Slab as claimed in claim 2 and Strip Shape Control technique, spy are：1st group of collection
Tube hub linear distance milling train center line 79000mm, the 14th group of collector center line swing left limit apart from milling train center line 97000mm
Position 80000mm, swings right limit 96000mm；When water power is cooled down with Wide and Thick Slab using swing type, the right side is swung when steel plate head reaches
During limiting, roller-way reversion, steel plate to milling train direction run, when steel plate tail reach swing left limit when, roller-way rotate forward, steel plate to
It is run far from milling train direction；According to press quenching steel plate thickness and length, number of oscillations is set as 3 times, 5 times or 7 times.
4. the press quenching of water power Wide and Thick Slab as claimed in claim 2 and Strip Shape Control technique, spy are：For using
Press quenching is carried out by the formula type of cooling, all collectors are opened, and the 4th group of gap upper header lumen flow control of 1- is
200-260m3/ h, the 5th group of highly dense upper header lumen flow control are 500-600m3/ h, it is positive in subsequent jet impulse region
Injection upper header lumen flow and contra-injection upper header lumen flow reduce 50-100m3/h；6th, the 7th group of highly dense upper collection
The flow control of pipe lumen is 400-450m3/ h, the 8th group of highly dense upper header lumen flow control are 470-530m3Between/h, the 9th,
10th group of highly dense upper header lumen flow control is 300-400m3/ h, the 11st group of highly dense upper header lumen flow control are 370-
480m3/ h, the 12nd, the 13rd group of highly dense upper header lumen flow control are 300-400m3/ h, the 14th group of highly dense upper header lumen stream
Amount control is 370-480m3/h；Ensure to keep slide plate shape while final cooling temperature.
5. the press quenching of water power Wide and Thick Slab as claimed in claim 2 and Strip Shape Control technique, it is characterised in that：For adopting
Press quenching is carried out with the swing type type of cooling, all collectors are opened, and the 4th group of gap upper header lumen flow control of 1- is
240-260m3/ h, the 5th group of highly dense upper header lumen flow control are 550-600m3/ h, it is positive in subsequent jet impulse region
Injection upper header lumen flow is equal, and contra-injection upper header lumen flow is equal；6th, the 7th group of highly dense upper header lumen
Flow control is 300-350m3/ h, the 8th group of highly dense upper header lumen flow control are 370-470m3/ h, the 9th, the 10th group highly dense
The flow control of upper header lumen is 300-350m3/ h, the 11st group of highly dense upper header lumen flow control are 370-470m3/ h, the
12nd, the 13rd group of highly dense upper header lumen flow control is 300-350m3/ h, the 14th group of highly dense upper header lumen flow control are
370-470m3/h；Ensure to keep slide plate shape while final cooling temperature.
6. the press quenching of water power Wide and Thick Slab and Strip Shape Control technique as described in claim 4 or 5, it is characterised in that：It is right
In using the steel plate that press quenching is carried out by formula cooling or swing type cooling, when width is more than 2730mm, water convexity is carried out
Control, the side chamber flow for adjusting cooling upper header is the 30%-50% of lumen flow, ensures that steel plate width direction temperature is uniform.
7. the press quenching of water power Wide and Thick Slab and Strip Shape Control technique as described in claim 4 or 5, it is characterised in that：Two
Segment frames are adjusted according to steel plate thickness into Mobile state, and 1# frame water blocking roll spacings are from upper surface of steel plate 10-50mm, 2# frame upper headers
Jet port makes steel plate upper and lower surface symmetrical cooling, is conducive to cool down Strip Shape Control apart from upper surface of steel plate 350mm.
8. the press quenching of water power Wide and Thick Slab according to any one of claims 1 to 5 and Strip Shape Control technique,
Its spy is：The chemical component weight percentage of water power slab is：C：0.055-0.075%, Si：0.15-0.3%, Mn：
1.35-1.46%, P：0-0.013%, S：0-0.003%, Mo：0.07-0.12%, V：0.04-0.054%, Ti：0.007-0.03%,
Ni：0.15-0.25%, Alt：0.01-0.04%, remaining is Fe and inevitable impurity.
9. the press quenching of water power Wide and Thick Slab according to any one of claims 1 to 5 and Strip Shape Control technique,
Its spy is：The chemical component weight percentage of water power slab is：C：0.075-0.094%, Si：0.25-0.35%, Mn：
1.32-1.42%, P：0-0.013%, S：0-0.002%, Cr：0.25-0.35%, Mo：0.35-0.45%, V：0.04-0.05%, Ti：
0.012-0.02%, Ni：0.43-0.53%, Alt：0.04-0.07%, remaining is Fe and inevitable impurity.
10. the press quenching of water power Wide and Thick Slab according to any one of claims 1 to 5 and Strip Shape Control technique,
Its spy is：Use the blank of 260mm-265mm thickness, water power Wide and Thick Slab of the production finished product thickness for 34-56mm.
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| CN109207690A (en) * | 2018-11-30 | 2019-01-15 | 湖南华菱湘潭钢铁有限公司 | Generous plate heat treatment quenching and tempering production line |
| CN112474801B (en) * | 2020-11-09 | 2022-05-17 | 江苏省沙钢钢铁研究院有限公司 | Wide and thick plate with small trimming loss and production method thereof |
| CN112877513B (en) * | 2021-01-13 | 2022-11-22 | 首钢京唐钢铁联合有限责任公司 | Online quenching method for medium plate |
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