CN109652639A - A kind of annealing furnace of stainless steel band - Google Patents
A kind of annealing furnace of stainless steel band Download PDFInfo
- Publication number
- CN109652639A CN109652639A CN201811639855.3A CN201811639855A CN109652639A CN 109652639 A CN109652639 A CN 109652639A CN 201811639855 A CN201811639855 A CN 201811639855A CN 109652639 A CN109652639 A CN 109652639A
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- air
- stainless steel
- steel band
- cooled
- cooled unit
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 111
- 239000010935 stainless steel Substances 0.000 title claims abstract description 110
- 238000000137 annealing Methods 0.000 title claims abstract description 83
- 238000010438 heat treatment Methods 0.000 claims abstract description 122
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 238000001816 cooling Methods 0.000 claims abstract description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003546 flue gas Substances 0.000 claims abstract description 18
- 230000005389 magnetism Effects 0.000 claims abstract description 11
- 230000005855 radiation Effects 0.000 claims abstract description 8
- 239000002918 waste heat Substances 0.000 claims abstract description 4
- 239000000779 smoke Substances 0.000 claims description 49
- 238000005507 spraying Methods 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 9
- 238000005097 cold rolling Methods 0.000 description 25
- 239000000047 product Substances 0.000 description 14
- 230000006872 improvement Effects 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 7
- 229910001566 austenite Inorganic materials 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000006748 scratching Methods 0.000 description 3
- 230000002393 scratching effect Effects 0.000 description 3
- 239000011265 semifinished product Substances 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 206010070834 Sensitisation Diseases 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- 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
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses a kind of annealing furnaces of stainless steel band, including heating mechanism, air-cooled mechanism, magnetism servo-electric motor water-cooling and drier, wherein, the heating mechanism includes inlet seal section, preheating zone, heating zone and exit seal section, preheating zone, heating zone are encapsulated as a closing means by the inlet seal section and exit seal section, the heating zone is equipped with heated nozzle, and the heated nozzle, which jets out flames, heats stainless steel band, and generates flue gas；The preheating zone carries out the pre-heat treatment to stainless steel band by the convection current and radiation of flue gas；The drier includes air-heater, and the heat source of the air-heater is flue gas and waste heat that the heating mechanism generates.Using the present invention, structure is simple, simplifies traditional annealing process, and stainless steel band finished product mechanical property obtained is good.Moreover, consumption thermal energy is smaller, energy-saving effect is significant.
Description
Technical field
The present invention relates to stainless steel technical field more particularly to a kind of annealing furnaces of stainless steel band.
Background technique
Stainless steel band is the extension of ultra-thin stainless steel plate, mainly meets different each eka-golds of industrial department industrialized production
Belong to or the needs of engineering goods and the narrow and long steel plate of one kind that produces, be widely used in high-tech industry, IT industry and
Aeronautics and Astronautics industry, added value is high, but rolling mill practice is difficult to grasp, because can generate inside stainless steel band after first rolling
Internal stress thus affects the effect that finish rolling comes out, also has larger impact to the forming of finished product, different finished products is to hardness
It is required that it is different, rolling mill practice difficulty is increased again in this way, production efficiency is low, and lumber recovery is not high.
In order to remove the stress generated after rolling, majority uses annealing process, however, the annealing temperature of existing annealing process
It spends and holds time longer, this causes production efficiency to drastically reduce.Moreover, be easy to happen in annealing process disconnected band, bad material,
The problems such as hardness is unevenly distributed, surface quality is poor, surface scratching.In addition, the annealing temperature of existing annealing process is high, consumption
Thermal energy it is larger, be unfavorable for energy conservation and environmental protection.
The Chinese patent of 106244783 B of Publication No. CN discloses " a kind of stainless steel strip continuous producing method ",
Including cold rolling, annealing, derusting, smooth and etc., wherein the strip after cold rolling carries out continuous annealing treatment, altogether four-stage: pre-
The hot stage: strip rises to 380 DEG C from natural temperature, preheating time 20s；Temperature rise period: strip is warming up to 1130 DEG C from 380 DEG C,
Heating-up time 40s；Holding stage: belt steel temperature maintains 1130 DEG C, soaking time 8s；Temperature-fall period: it is cold that strip enters air
But section, cooling time 7s, temperature is down to 400 DEG C, subsequently enter water mist cooling section, cooling time 10s, temperature is down to 200 DEG C, most
Enter cooling by water section afterwards, cooling time 3.5s, temperature is down to 80 DEG C or less.
Above-mentioned annealing process needs to control precisely, and production difficulty is higher, can remove stainless steel by above-mentioned annealing process
The residual stress of band is still preheating to 380 DEG C and only needs 20s, strip is warming up to 1130 DEG C from 380 DEG C, and the heating-up time also only needs
40s, preheating and heating are all to need individual heat source, moreover, temperature-fall period is also to be quickly cooled down, cooling down, it is uneven to be easy, this
Sample causes the mechanical property of stainless steel band ideal not enough, and elongation percentage is only 46-55%, in addition, surface smoothness is
Ra0.6-0.8, appearance are also not bright enough.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of annealing furnace of stainless steel band, can simplify traditional
Annealing process, stainless steel band finished product mechanical property obtained is good, and flatness is good, and hardness is uniform, and roughness is small, and bright in appearance is high
Shelves.
The technical problems to be solved by the invention also reside in, and provide a kind of annealing furnace of stainless steel band, and consumption thermal energy is smaller,
Energy-saving effect is significant.
To solve the above-mentioned problems, the annealing furnace of a kind of stainless steel band provided by the invention, including heating mechanism, air cooler
Structure, magnetism servo-electric motor water-cooling and drier, wherein the heating mechanism includes inlet seal section, preheating zone, heating zone and exit seal
Preheating zone, heating zone are encapsulated as a closing means by section, the inlet seal section and exit seal section, and the heating zone, which is equipped with, to be added
Hot nozzle, the heated nozzle, which jets out flames, heats stainless steel band, and generates flue gas, so that stainless steel band is from T1
1160 DEG C are heated to, and stainless steel band was at temperature at least 15 seconds of 1080 DEG C or more；The convection current that the preheating zone passes through flue gas
The pre-heat treatment is carried out to stainless steel band with radiation, so that stainless steel band is heated to T from 30 DEG C1, T1=250-300 DEG C；
The air-cooled mechanism successively carries out cooling treatment by air to stainless steel band；
The magnetism servo-electric motor water-cooling includes spraying box, and the spraying box is passed through cooling water and compressed air；
The drier includes air-heater, and the heat source of the air-heater is the flue gas that the heating mechanism generates and remaining
Heat；
Wherein, the annealing furnace is equipped at least 7 cage plate temperature meters, and at least 3 cage plate temperature meters are mounted in heating mechanism, and at least 2
The inlet that cage plate temperature meter is mounted in air-cooled mechanism, at least 1 cage plate temperature meter is mounted on magnetism servo-electric motor water-cooling, at least 1 cage plate Wen Jian
In drier.
As an improvement of the above scheme, the length of the annealing furnace is 200-240m, and the transmission speed of stainless steel band is
160-220m/min, the annealing furnace are equipped at least 7 cage plate temperature meters, including the first plate temperature meter, the second plate temperature meter, third plate temperature
Meter, the 4th plate temperature meter, the 5th plate temperature meter, the 6th plate temperature meter and the 7th plate temperature meter；
The first plate temperature meter is set at the 90-100m apart from annealing furnace entrance, for controlling temperature in 580-620
℃；
The second plate temperature meter is set at the 115-125m apart from annealing furnace entrance, for controlling temperature at 1080 DEG C；
The third plate temperature meter is set at the 135-145m apart from annealing furnace entrance, for controlling temperature in 1100-
1160℃；
The 4th plate temperature meter is set at the 150-155m apart from annealing furnace entrance, for controlling temperature in 950-980
℃；
The 5th plate temperature meter is set at the 180-188m apart from annealing furnace entrance, for controlling temperature in 400-460
℃；
The 6th plate temperature meter is set at the 200-210m apart from annealing furnace entrance, for controlling temperature in room temperature -180
℃；
The 7th plate temperature meter is set at the 210-220m apart from annealing furnace entrance, for controlling temperature in room temperature -70
℃。
As an improvement of the above scheme, the 5th plate temperature meter of the 4th plate Wen Jiyu is each provided at the air-cooled of the annealing furnace
Section, air-cooled section between the 5th plate temperature meter of the 4th plate Wen Jiyu, the 50 DEG C/s of cooling rate > of stainless steel band；
The second plate temperature meter and third plate temperature meter are each provided at the bringing-up section of the annealing furnace, the 4th plate Wen Jiyu
Bringing-up section between five plate temperature meters, the rate of heat addition of stainless steel band maintain 8-12 DEG C/s.
As an improvement of the above scheme, the heating zone includes the first heating zone, the second heating zone, third heating point
Area, the 4th heating zone, the 5th heating zone, the 6th heating zone, the 7th heating zone, the 8th heating zone, the 9th heating
Subregion, the tenth heating zone；
The burner quantity of first heating zone is 10-16, and burner power is 6500-7000kw；
The burner quantity of second heating zone is 10-16, and burner power is 6300-6800kw；
The burner quantity of the third heating zone is 10-16, and burner power is 5400-6000kw；
The burner quantity of 4th heating zone is 10-16, and burner power is 4800-5300kw；
The burner quantity of 5th heating zone is 10-16, and burner power is 4000-4300kw；
The burner quantity of 6th heating zone is 10-16, and burner power is 3500-4000kw；
The burner quantity of 7th heating zone is 10-16, and burner power is 2500-3200kw；
The burner quantity of 8th heating zone is 10-16, and burner power is 1400-2000kw；
The burner quantity of 9th heating zone is 10-16, and burner power is 1200-1800kw；
The burner quantity of tenth heating zone is 10-16, and burner power is 1200-1800kw.
As an improvement of the above scheme, the heating zone is additionally provided with combustion fan and air exhauster, the combustion fan
Flow is 60000-68000m3/ h, pressure 12-18KPa, inlet air temperature are 20-30 DEG C；
The flow of the air exhauster is 180000-210000m3/ h, pressure 2-3KPa, leaving air temp 150-250
℃。
As an improvement of the above scheme, the furnace roof of the heating zone is equipped with ceramic fiber module, porosity rate 93-
98%, with a thickness of 200-500mm.
As an improvement of the above scheme, the air-cooled mechanism is air-cooled including the first air-cooled unit, the second air-cooled unit, third
Unit, the 4th air-cooled unit, the 5th air-cooled unit, the 6th air-cooled unit, the 7th air-cooled unit and the 8th air-cooled unit；Described
The smoke evacuation flow of one air-cooled unit and the second air-cooled unit is 180000-220000m3/ h, the exhaust temperature of smoke evacuation are 180-200
DEG C, pressure 140-160daPa；
The smoke evacuation flow of the air-cooled unit of the third and the 4th air-cooled unit is 250000-280000m3/ h, the row of smoke evacuation
Putting temperature is 110-140 DEG C, pressure 140-160daPa；
The smoke evacuation flow of the 5th air-cooled unit and the 6th air-cooled unit is 240000-260000m3/ h, the row of smoke evacuation
Putting temperature is 80-100 DEG C, pressure 140-160daPa；
The smoke evacuation flow of the 7th air-cooled unit and the 8th air-cooled unit is 230000-250000m3/ h, the row of smoke evacuation
Putting temperature is 60-85 DEG C, pressure 140-160daPa.
As an improvement of the above scheme, the smoke evacuation flow of the described first air-cooled unit and the second air-cooled unit, smoke evacuation row
It is identical to put temperature, pressure；
The air-cooled unit of the third and the smoke evacuation flow of the 4th air-cooled unit, the exhaust temperature of smoke evacuation, pressure are identical；
The 5th air-cooled unit and the smoke evacuation flow of the 6th air-cooled unit, the exhaust temperature of smoke evacuation, pressure are identical；
The 7th air-cooled unit and the smoke evacuation flow of the 8th air-cooled unit, the exhaust temperature of smoke evacuation, pressure are identical.
As an improvement of the above scheme, the described first air-cooled unit, the second air-cooled unit, the air-cooled unit of third, the 4th sky
Cold unit, the 5th air-cooled unit, the 6th air-cooled unit, the 7th air-cooled unit and the 8th air-cooled unit are equipped with pressure regulator；
The exit of the air-cooled mechanism is equipped with infrared pyrometer, and the infrared pyrometer is connected with pressure regulator,
Temperature for the stainless steel band detected according to infrared pyrometer corrects the first air-cooled list by pressure regulator automatically
It is member, the second air-cooled unit, the air-cooled unit of third, the 4th air-cooled unit, the 5th air-cooled unit, the 6th air-cooled unit, the 7th air-cooled
The pressure of unit and the 8th air-cooled unit.
As an improvement of the above scheme, it is 15-25m that the spraying box, which is passed through the flow of cooling water,3/ h, is passed through compressed air
Flow be 1200-1800Nm3/h.The flow of the air-heater is 20000-60000m3/ h, pressure 800-1200daPa.
The invention has the following beneficial effects:
(1) annealing furnace of a kind of stainless steel band provided by the invention, including heating mechanism, air-cooled mechanism, magnetism servo-electric motor water-cooling and
Drier, structure is simple, passes through the uniform of the preheating of heating mechanism, heat treatment and air-cooled mechanism and magnetism servo-electric motor water-cooling
It is cooling, the crystal phase tissue that the plastic deformation that strip generates in rolling is destroyed effectively is repaired, lattice tissue is refined, substantially improves
Machining property after cold rolling, stainless steel band finished product mechanical property obtained is good, and flatness is good, and hardness is uniform, and roughness is small,
Bright in appearance is high-grade, effectively avoids the problems such as poor disconnected band, bad material, hardness unevenness, surface quality, surface scratching occurs, mentions
The high lumber recovery of product.The stainless steel band finished product mechanical property is good, yield strength 300-350MPa, and tensile strength is
700-750MPa, extensibility 60-70%, hardness 170-190HV.
(2) heating mechanism of the present invention includes inlet seal section, preheating zone, heating zone and exit seal section, wherein preheating zone
Heat source used is the smoke convection and radiation that the flame that burner sprays generates, and realizes recycling for furnace area high-temp waste gas,
By fume afterheat using and the combustion air of preheating applied to combustion-supporting, energy-saving effect is significant.Moreover, is produced from the heating zone
Stainless steel band can also be dried in raw flue gas and waste heat, carry out secondary use to flue gas.
(3) stainless steel band of the present invention is heated slowly to 250-300 DEG C from 30 DEG C using the convection current and radiation of flue gas, then from
250-300 DEG C is rapidly heated to 1160 DEG C, and stainless steel band was rationally controlled at temperature at least 15 seconds of 1080 DEG C or more
Heating-up time simplifies annealing process, shortens the high annealing time, improves production efficiency.
(4) for the present invention by the position of setting plate temperature meter arrangement, it can accurately measure the actual temperature of steel band, and according to
Furnace temperature setting and speed setting are adjusted according to the actual temperature of steel band, guarantee the correct execution of heat treatment process, it is ensured that steel band power
Performance is learned to stablize.
(5) the air-cooled mechanism includes the first air-cooled unit, the second air-cooled unit, the air-cooled unit of third, the 4th air-cooled list
Member, the 5th air-cooled unit, the 6th air-cooled unit, the 7th air-cooled unit and the 8th air-cooled unit, the air-cooled processing of stainless steel is by 8
Control unit is realized, is guaranteed the flatness of strip by smoothly cooling down and is avoided carbide precipitation, makes strip plasticity
Increase, for elongation percentage up to 60-70%, stainless steel finished surface roughness is small, bright straight.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the annealing furnace of stainless steel band of the present invention.
Fig. 2 is the structural schematic diagram of heating mechanism shown in Fig. 1.
Fig. 3 is the structural schematic diagram of air-cooled mechanism shown in Fig. 1.
Fig. 4 is the structural schematic diagram of magnetism servo-electric motor water-cooling and drier shown in Fig. 1.
Fig. 5 is the schematic view of the mounting position of plate temperature meter of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention will be made below further detailed
Description.
As shown in Figure 1, a kind of annealing furnace of stainless steel band provided by the invention, including heating mechanism 1, air-cooled mechanism 2, water
Cold structure 3 and drier 4, wherein the heating mechanism 1 includes inlet seal section 11, preheating zone 12, heating zone 13 and outlet
Preheating zone 12, heating zone 13 are encapsulated as a closing means, institute by seal section 14, the inlet seal section 11 and 14 sections of exit seal
Heating zone 13 is stated equipped with heated nozzle, the heated nozzle, which jets out flames, heats stainless steel band, and generates flue gas,
So that stainless steel band is from T11160 DEG C are heated to, and stainless steel band was at temperature at least 15 seconds of 1080 DEG C or more；The preheating
Area carries out the pre-heat treatment to stainless steel band by the convection current and radiation of flue gas, so that stainless steel band is heated to T from 30 DEG C1, T1=
250-300℃。
Preferably, the length of inlet seal section 11 is 1-3m, the length of preheating zone 12 is 25-35m, 13 length of heating zone
Length for 55-80m, exit seal section 14 is 2-5m.Inlet seal section 11 is inlet seal equipment, and inlet seal section 11 is equipped with
Scheme for exhaust gas circulation system, for, to herein, the heat in flue gas to be preheated section by convection current and radiation by the flue gas emission of heating zone
Recycling a part.The exit seal section 14 is exit seal equipment.
Stainless steel band of the present invention is heated slowly to 250-300 DEG C from 30 DEG C using the convection current and radiation of flue gas, then from 250-
300 DEG C are rapidly heated to 1160 DEG C, and stainless steel band, at temperature at least 15 seconds of 1080 DEG C or more, the present invention passes through conjunction
The reason control heating-up time effectively repairs the crystal phase tissue that the plastic deformation that strip generates in rolling is destroyed, refines lattice tissue,
Machining property after substantially improving cold rolling, stainless steel band finished product mechanical property obtained is good, and flatness is good, and hardness is equal
Even, roughness is small, and bright in appearance is high-grade, effectively avoids occurring that disconnected band, bad material, hardness is uneven, surface quality is poor, surface stroke
The problems such as hurting improves the lumber recovery of product.And annealing process is simplified, the high annealing time is shortened, improves production effect
Rate.
Specifically, as shown in Fig. 2, the heating zone 13 includes the first heating zone 131, the second heating zone 132, third
Heating zone 133, the 4th heating zone 134, the 5th heating zone 135, the 6th heating zone 136, the 7th heating zone 137,
8th heating zone 138, the 9th heating zone 139, the tenth heating zone 140；Each heating zone is mounted on burner, described
Burner jets out flames, and heats to stainless steel band.
The burner quantity of first heating zone 131 is 10-16, and burner power is 6500-7000kw, top temperature
It is 1200-1280 DEG C；
The burner quantity of second heating zone 132 is 10-16, and burner power is 6300-6800kw, top temperature
It is 1200-1280 DEG C；
The burner quantity of the third heating zone 133 is 10-16, and burner power is 5400-6000kw, top temperature
It is 1200-1280 DEG C；
The burner quantity of 4th heating zone 134 is 10-16, and burner power is 4800-5300kw, top temperature
It is 1200-1280 DEG C；
The burner quantity of 5th heating zone 135 is 10-16, and burner power is 4000-4300kw, top temperature
It is 1200-1280 DEG C；
The burner quantity of 6th heating zone 136 is 10-16, and burner power is 3500-4000kw, top temperature
It is 1200-1280 DEG C；
The burner quantity of 7th heating zone 137 is 10-16, and burner power is 2500-3200kw, top temperature
It is 1190-1260 DEG C；
The burner quantity of 8th heating zone 138 is 10-16, and burner power is 1400-2000kw, top temperature
It is 1150-1220 DEG C；
The burner quantity of 9th heating zone 139 is 10-16, and burner power is 1200-1800kw, top temperature
It is 1150-1220 DEG C；
The burner quantity of tenth heating zone 140 is 10-16, and burner power is 1200-1800kw, top temperature
It is 1150-1220 DEG C.
The present invention realizes that the computer heating control to stainless steel band, computer heating control are accurate by 10 heating zones.Moreover, 10
The burner power of a heating zone is all the performance setting according to stainless steel band, and burner power gradually decreases, and is smoothly heated
It can guarantee the mechanical property of stainless steel band.
Preferably, in order to guarantee heating effect, the heating zone is additionally provided with combustion fan and air exhauster, the combustion air
The flow of machine is 60000-68000m3/ h, pressure 12-18KPa, inlet air temperature are 20-30 DEG C；The flow of the air exhauster
For 180000-210000m3/ h, pressure 2-3KPa, leaving air temp are 150-250 DEG C.
The furnace roof of the heating zone is equipped with ceramic fiber module, porosity rate 93-98%, with a thickness of 200-500mm.Pottery
Porcelain fiber is a kind of fibrous light refractory material, have light-weight, high temperature resistant, thermal stability is good, thermal conductivity is low, specific heat is small and
The advantages that mechanical resistant shakes.Furnace roof is added ceramic fiber module by the present invention, can improve the heat insulation effect of heating zone and heat-resisting
Effect, and its thermal insulation is good, advantageously ensures that the safety of production, improves the environment of workshop.
As shown in figure 3, the air-cooled mechanism 2 includes the first air-cooled unit 21, the second air-cooled unit 22, the air-cooled unit of third
23, the 4th air-cooled unit 24, the 5th air-cooled unit 25, the 6th air-cooled unit 26, the 7th air-cooled unit 27 and the 8th air-cooled unit
28, the first air-cooled unit 21, the second air-cooled unit 22, the air-cooled unit 23 of third, the 4th air-cooled unit 24, the 5th air-cooled list
First 25, the 6th air-cooled unit 26, the 7th air-cooled unit 27 and the 8th air-cooled unit 28 are successively carried out stainless steel band by air
Cooling treatment.The air-cooled mechanism 2 of the present invention is realized that length is 8* (6m-9m)=48m-72m, preferably 8* by 8 control units
7m=56m guarantees the flatness of strip by smoothly cooling down and avoids carbide precipitation, ensure that stainless steel finished product
Quality.
Preferably, the smoke evacuation flow of the described first air-cooled unit 21 and the second air-cooled unit 22 is 180000-220000m3/
H, the exhaust temperature of smoke evacuation are 180-200 DEG C, pressure 140-160daPa；
The smoke evacuation flow of the air-cooled unit 23 of the third and the 4th air-cooled unit 24 is 250000-280000m3/ h, smoke evacuation
Exhaust temperature be 110-140 DEG C, pressure 140-160daPa；
The smoke evacuation flow of the 5th air-cooled unit 25 and the 6th air-cooled unit 26 is 240000-260000m3/ h, smoke evacuation
Exhaust temperature be 80-100 DEG C, pressure 140-160daPa；
The smoke evacuation flow of the 7th air-cooled unit 27 and the 8th air-cooled unit 28 is 230000-250000m3/ h, smoke evacuation
Exhaust temperature be 60-85 DEG C, pressure 140-160daPa.
More preferably, the described first air-cooled unit 21 and the smoke evacuation flow of the second air-cooled unit 22, the exhaust temperature of smoke evacuation, pressure
Power is identical；The air-cooled unit 23 of third is identical with the smoke evacuation flow of the 4th air-cooled unit 24, the exhaust temperature of smoke evacuation, pressure；
The 5th air-cooled unit 25 is identical with the smoke evacuation flow of the 6th air-cooled unit 26, the exhaust temperature of smoke evacuation, pressure；Described 7th
Air-cooled unit 27 is identical with the smoke evacuation flow of the 8th air-cooled unit 28, the exhaust temperature of smoke evacuation, pressure.
Air-cooled section of the invention is realized by 8 control units, and innovatively by the cooling of two neighbouring air-cooled units
Condition is set as identical, guarantees the flatness of strip by smoothly cooling down and avoids carbide precipitation, increases strip plasticity
Greatly, for elongation percentage up to 60-70%, stainless steel finished surface roughness is small, bright straight.
Moreover, the present invention can adjust the cooling of stainless steel band according to heat demand, to adjust the pressure of blower input terminal
Power prevents stainless steel band from deforming.And the setting value of pressure can be according to the stainless steel band temperature that infrared pyrometer measures come automatic
Amendment, infrared pyrometer are located at air-cooled section of outlet, and specific structure setting is as follows:
The first air-cooled unit 21, the second air-cooled unit 22, the air-cooled unit 23 of third, the 4th air-cooled unit the 24, the 5th
Air-cooled unit 25, the 6th air-cooled unit 26, the 7th air-cooled unit 27 and the 8th air-cooled unit 28 are equipped with pressure regulator；
The exit of the air-cooled mechanism is equipped with infrared pyrometer, and the infrared pyrometer is connected with pressure regulator,
Temperature for the stainless steel band detected according to infrared pyrometer corrects the first air-cooled unit by pressure regulator automatically
21, the air-cooled unit 23 of the second air-cooled unit 22, third, the 4th air-cooled unit 24, the 5th air-cooled unit 25, the 6th air-cooled unit
26, the pressure of the 7th air-cooled unit 27 and the 8th air-cooled unit 28.
As shown in figure 4, the length of the magnetism servo-electric motor water-cooling 3 is 6-7m comprising spraying box 31, the length of spraying box are 2-
3m, the spraying box 31 are passed through cooling water and compressed air, and the flow of the cooling water is 15-25m3/ h, the compressed air
Flow be 1200-1800Nm3/h.Stainless steel band is cooled to 80 DEG C by the spraying box 31, realizes secondary cooling treatment.
The drier 4 includes squeeze roller (not shown) and air-heater 42, and the heat source of the air-heater 42 is institute
State the flue gas and waste heat of the generation of heating mechanism 1.
The squeeze roller is used to remove stainless steel band surface from water quenching bring moisture.Squeeze roller generally comprises upper roller under
Roller, upper roller and lower roll are driven by cylinder respectively, and can manually or electrically adjust.
The flow of the air-heater 42 is 20000-60000m3/ h, pressure 800-1200daPa.The length of heated-air drying section
Degree is 6-10m, but not limited to this.
As the present invention more preferably embodiment, as shown in figure 5, the annealing furnace is equipped at least 7 cage plate temperature meters, at least 3 sets
Plate temperature meter is mounted in heating mechanism, and at least 2 cage plate temperature meters are mounted in air-cooled mechanism, at least 1 cage plate temperature meter is mounted on water cooling
The inlet of mechanism, at least 1 cage plate temperature meter are mounted in drier.
Specifically, the length of the annealing furnace is 200-240m, the transmission speed of stainless steel band is 160-220m/min, institute
Annealing furnace is stated equipped at least 7 cage plate temperature meters, including the first plate temperature meter, the second plate temperature meter, third plate temperature meter, the 4th plate temperature meter, the
Five plate temperature meters, the 6th plate temperature meter and the 7th plate temperature meter；
The first plate temperature meter is set at the 90-100m apart from annealing furnace entrance, and installation site is region A shown in Fig. 3,
For controlling temperature at 580-620 DEG C, the computer heating control of first stage is realized；
The second plate temperature meter is set at the 115-125m apart from annealing furnace entrance, and installation site is region shown in Fig. 3
B realizes the computer heating control of second stage for controlling temperature at 1080 DEG C；
The third plate temperature meter is set at the 135-145m apart from annealing furnace entrance, and installation site is region shown in Fig. 3
C realizes the computer heating control of phase III for controlling temperature at 1100-1160 DEG C；
The 4th plate temperature meter is set at the 150-155m apart from annealing furnace entrance, and installation site is region shown in Fig. 3
D realizes the air-cooled control of first stage for controlling temperature at 950-980 DEG C；
The 5th plate temperature meter is set at the 180-188m apart from annealing furnace entrance, and installation site is region shown in Fig. 3
E realizes the air-cooled control of second stage for controlling temperature at 400-460 DEG C；
The 6th plate temperature meter is set at the 200-210m apart from annealing furnace entrance, and installation site is region shown in Fig. 3
F realizes water-cool control for controlling temperature at -180 DEG C of room temperature；
The 7th plate temperature meter is set at the 210-220m apart from annealing furnace entrance, and installation site is region shown in Fig. 3
G realizes drying control for controlling temperature at -70 DEG C of room temperature.
For the present invention by the position of setting plate temperature meter arrangement, it can accurately measure the actual temperature of steel band, and foundation
The actual temperature of steel band sets to adjust furnace temperature setting and speed, guarantees the correct execution of heat treatment process, it is ensured that steel band mechanics
Performance is stablized.
The 5th plate temperature meter of 4th plate Wen Jiyu is each provided at air-cooled section of the annealing furnace, the 4th plate Wen Jiyu
Air-cooled section between five plate temperature meters, intergranular sensitization can occur to avoid stainless steel band in the 50 DEG C/s of cooling rate > of stainless steel band
The phenomenon that.
The second plate temperature meter and third plate temperature meter are each provided at the bringing-up section of the annealing furnace, the 4th plate Wen Jiyu
Bringing-up section between five plate temperature meters, the rate of heat addition of stainless steel band maintain 8-12 DEG C/s, guarantee that crystal phase tissue all has occurred
Dynamic recrystallization, stress have reached stationary value.
To sum up, the annealing of annealing furnace through the invention, the composition by weight percent of stainless steel band finished product obtained are as follows:
C 0.01~0.05%, Ni 6.0~9.5%, Cr 16.5~20.0%, Mn 0.1~3.0%, Cu 0.01~
0.2%, Si 0.15~1.0%, P 0.01~0.2%, S 0.01-0.1%, N 0.02~0.15%, remaining is Fe and can not
Avoid impurity.
Specifically, C 0.01~0.05% and Si 0.15~1.0%, can promote austenite to be formed, and stable austenite
Tissue, while the intensity of stainless steel can be improved, and obtain good forming property, it is suitble to cold-rolling process to carry out.Arrange in pairs or groups Mn again
0.1~3.0% and Ni 6.0~9.5% can improve the mechanical property of stainless steel band with stable austenite, furthermore, it is possible to improve
The forming property of stainless steel band is suitble to cold-rolling process to carry out, and lays the foundation for the subsequent good version type of acquisition.Contain Cr 16.5
~20.0%, so that the stainless steel band is obtained good corrosion resistance.Containing N 0.02~0.15%, can with stable austenite,
Be conducive to improve the intensity and corrosion resistance of stainless steel band simultaneously.Cu 0.01~0.2% can reduce austenite phase fault
Can, improve the plasticity and forming property of stainless steel band.
Preferably, the composition by weight percent of the stainless steel band finished product as made from above-mentioned cold rolling process are as follows:
C 0.03~0.04%, Ni 7.0~9.0%, Cr 17.5~19.0%, Mn 0.5~2.0%, Cu 0.02~
0.08%, Si 0.40~0.80%, P 0.02~0.05%, S 0.01-0.05%, N 0.02~0.06%, remaining for Fe and
Inevitable impurity.
The mechanical property of the stainless steel band finished product is as follows:
| Project | Numerical value |
| Thickness | 0.3-3mm |
| Yield strength | 300-350MPa |
| Tensile strength | 700-750MPa |
| Extensibility | 60-70% |
| Hardness | 170-190HV |
| Surface roughness | 0.15-0.25μm |
With specific embodiment, the present invention is further explained below
(1) preparation method of stainless steel:
1, thickness stainless steel band blank is selected；
2, upper volume is carried out to stainless steel band blank；
3, the stainless steel band blank after upper volume is transmitted on laser-beam welding machine by entry loop, to different volume stainless steels
Band blank carries out laser welding；
4, the stainless steel band blank after laser welding is subjected to the first passage cold rolling by the first cold-rolling mill；
5, the stainless steel band blank after the first passage cold rolling is subjected to the second passage cold rolling by the second cold-rolling mill；
6, the stainless steel band blank after the second passage cold rolling is subjected to the cold rolling of third passage by third cold-rolling mill；
7, the stainless steel band blank after third passage cold rolling is subjected to four-pass cold rolling by the 4th cold-rolling mill；
8, the stainless steel band blank after four-pass cold rolling is subjected to the 5th passage cold rolling by the 5th cold-rolling mill；
9, the stainless steel band blank after the 5th passage cold rolling is subjected to the 6th passage cold rolling by the 6th cold-rolling mill；
10, the stainless steel band blank after the 6th passage cold rolling is cleaned；
11, the stainless steel band blank after cleaning is transmitted to subsequent processing by outlet looping, is dried, cleaned, is obtained
To stainless steel band semi-finished product；
12, the stainless steel band semi-finished product after drying are made annealing treatment in annealing furnace, wherein the parameter of annealing furnace is set
It sets as shown in Table 1:
13, the stainless steel band semi-finished product after annealing are electrolysed, after pickling, straightening are smooth, obtain stainless steel band
Finished product.
(2) parameter setting of table one, annealing furnace are as follows:
(3) it is as follows that stainless steel band end properties is made:
(4) the annealing furnace consumption energy is as follows:
| Project | The prior art | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Consume natural gas | 35-45J/m3 | 26J/m3 | 28J/m3 | 29J/m3 |
In conclusion annealing furnace of the present invention, structure is simple, simplifies annealing process, stainless steel band finished product mechanical property obtained
Can be good, flatness is good, and hardness is uniform, and roughness is small, and bright in appearance is high-grade, effectively avoids that disconnected band, bad material, hardness occurs not
, the problems such as surface quality is poor, surface scratching.Moreover, the annealing furnace consumption thermal energy is smaller, energy-saving effect is significant.
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, therefore equivalent changes made in accordance with the claims of the present invention, are still within the scope of the present invention.
Claims (10)
1. a kind of annealing furnace of stainless steel band, which is characterized in that including heating mechanism, air-cooled mechanism, magnetism servo-electric motor water-cooling and drying machine
Structure, wherein the heating mechanism includes inlet seal section, preheating zone, heating zone and exit seal section, the inlet seal section and
Preheating zone, heating zone are encapsulated as a closing means by exit seal section, and the heating zone is equipped with heated nozzle, the heated nozzle
It jets out flames and stainless steel band is heated, and generate flue gas, so that stainless steel band is from T11160 DEG C are heated to, and stainless
Steel band was temperature at least 15 seconds of 1080 DEG C or more；The preheating zone carries out stainless steel band by the convection current and radiation of flue gas
The pre-heat treatment, so that stainless steel band is heated to T from 30 DEG C1, T1=250-300 DEG C；
The air-cooled mechanism successively carries out cooling treatment by air to stainless steel band；
The magnetism servo-electric motor water-cooling includes spraying box, and the spraying box is passed through cooling water and compressed air；
The drier includes air-heater, and the heat source of the air-heater is flue gas and waste heat that the heating mechanism generates；
Wherein, the annealing furnace is equipped at least 7 cage plate temperature meters, and at least 3 cage plate temperature meters are mounted in heating mechanism, at least 2 cage plates
Temperature meter is mounted in air-cooled mechanism, the inlet that at least 1 cage plate temperature meter is mounted on magnetism servo-electric motor water-cooling, and at least 1 cage plate temperature meter is mounted on
In drier.
2. the annealing furnace of stainless steel band as described in claim 1, which is characterized in that the length of the annealing furnace is 200-
240m, the transmission speed of stainless steel band are 160-220m/min, and the annealing furnace is equipped at least 7 cage plate temperature meters, including the first plate
Warm meter, the second plate temperature meter, third plate temperature meter, the 4th plate temperature meter, the 5th plate temperature meter, the 6th plate temperature meter and the 7th plate temperature meter；
The first plate temperature meter is set at the 90-100m apart from annealing furnace entrance, for controlling temperature at 580-620 DEG C；
The second plate temperature meter is set at the 115-125m apart from annealing furnace entrance, for controlling temperature at 1080 DEG C；
The third plate temperature meter is set at the 135-145m apart from annealing furnace entrance, for controlling temperature at 1100-1160 DEG C；
The 4th plate temperature meter is set at the 150-155m apart from annealing furnace entrance, for controlling temperature at 950-980 DEG C；
The 5th plate temperature meter is set at the 180-188m apart from annealing furnace entrance, for controlling temperature at 400-460 DEG C；
The 6th plate temperature meter is set at the 200-210m apart from annealing furnace entrance, for controlling temperature at -180 DEG C of room temperature；
The 7th plate temperature meter is set at the 210-220m apart from annealing furnace entrance, for controlling temperature at -70 DEG C of room temperature.
3. the annealing furnace of stainless steel band as described in claim 1, which is characterized in that the 5th plate temperature meter of the 4th plate Wen Jiyu
Be each provided at air-cooled section of the annealing furnace, air-cooled section between the 5th plate temperature meter of the 4th plate Wen Jiyu, stainless steel band it is cold
But 50 DEG C/s of rate >；
The second plate temperature meter and third plate temperature meter are each provided at the bringing-up section of the annealing furnace, the 5th plate of the 4th plate Wen Jiyu
Bringing-up section between temperature meter, the rate of heat addition of stainless steel band maintain 8-12 DEG C/s.
4. the annealing furnace of stainless steel band as described in claim 1, which is characterized in that the heating zone includes the first heating point
Area, the second heating zone, third heating zone, the 4th heating zone, the 5th heating zone, the 6th heating zone, the 7th heating
Subregion, the 8th heating zone, the 9th heating zone, the tenth heating zone；
The burner quantity of first heating zone is 10-16, and burner power is 6500-7000kw；
The burner quantity of second heating zone is 10-16, and burner power is 6300-6800kw；
The burner quantity of the third heating zone is 10-16, and burner power is 5400-6000kw；
The burner quantity of 4th heating zone is 10-16, and burner power is 4800-5300kw；
The burner quantity of 5th heating zone is 10-16, and burner power is 4000-4300kw；
The burner quantity of 6th heating zone is 10-16, and burner power is 3500-4000kw；
The burner quantity of 7th heating zone is 10-16, and burner power is 2500-3200kw；
The burner quantity of 8th heating zone is 10-16, and burner power is 1400-2000kw；
The burner quantity of 9th heating zone is 10-16, and burner power is 1200-1800kw；
The burner quantity of tenth heating zone is 10-16, and burner power is 1200-1800kw.
5. the annealing furnace of stainless steel band as claimed in claim 4, which is characterized in that the heating zone be additionally provided with combustion fan and
Air exhauster, the flow of the combustion fan are 60000-68000m3/ h, pressure 12-18KPa, inlet air temperature 20-30
℃；
The flow of the air exhauster is 180000-210000m3/ h, pressure 2-3KPa, leaving air temp are 150-250 DEG C.
6. the annealing furnace of stainless steel band as claimed in claim 5, which is characterized in that it is fine that the furnace roof of the heating zone is equipped with ceramics
Tie up module, porosity rate 93-98%, with a thickness of 200-500mm.
7. the annealing furnace of stainless steel band as described in claim 1, which is characterized in that the air-cooled mechanism includes the first air-cooled list
It is member, the second air-cooled unit, the air-cooled unit of third, the 4th air-cooled unit, the 5th air-cooled unit, the 6th air-cooled unit, the 7th air-cooled
Unit and the 8th air-cooled unit；
The smoke evacuation flow of the first air-cooled unit and the second air-cooled unit is 180000-220000m3/ h, the exhaust temperature of smoke evacuation
It is 180-200 DEG C, pressure 140-160daPa；
The smoke evacuation flow of the air-cooled unit of the third and the 4th air-cooled unit is 250000-280000m3/ h, the exhaust temperature of smoke evacuation
It is 110-140 DEG C, pressure 140-160daPa；
The smoke evacuation flow of the 5th air-cooled unit and the 6th air-cooled unit is 240000-260000m3/ h, the exhaust temperature of smoke evacuation
It is 80-100 DEG C, pressure 140-160daPa；
The smoke evacuation flow of the 7th air-cooled unit and the 8th air-cooled unit is 230000-250000m3/ h, the exhaust temperature of smoke evacuation
It is 60-85 DEG C, pressure 140-160daPa.
8. the annealing furnace of stainless steel band as claimed in claim 7, which is characterized in that the first air-cooled unit and second air-cooled
The smoke evacuation flow of unit, the exhaust temperature of smoke evacuation, pressure are identical；
The air-cooled unit of the third and the smoke evacuation flow of the 4th air-cooled unit, the exhaust temperature of smoke evacuation, pressure are identical；
The 5th air-cooled unit and the smoke evacuation flow of the 6th air-cooled unit, the exhaust temperature of smoke evacuation, pressure are identical；
The 7th air-cooled unit and the smoke evacuation flow of the 8th air-cooled unit, the exhaust temperature of smoke evacuation, pressure are identical.
9. the annealing furnace of stainless steel band as described in claim 1, which is characterized in that the first air-cooled unit, second air-cooled
The air-cooled unit of unit, third, the 4th air-cooled unit, the 5th air-cooled unit, the 6th air-cooled unit, the 7th air-cooled unit and the 8th are empty
Cold unit is equipped with pressure regulator；
The exit of the air-cooled mechanism is equipped with infrared pyrometer, and the infrared pyrometer is connected with pressure regulator, is used for
According to the temperature for the stainless steel band that infrared pyrometer detects, the first air-cooled unit, the are corrected automatically by pressure regulator
Two air-cooled units, the air-cooled unit of third, the 4th air-cooled unit, the 5th air-cooled unit, the 6th air-cooled unit, the 7th air-cooled unit and
The pressure of 8th air-cooled unit.
10. the annealing furnace of stainless steel band as described in claim 1, which is characterized in that the spraying box is passed through the stream of cooling water
Amount is 15-25m3/ h, the flow for being passed through compressed air is 1200-1800Nm3/h；
The flow of the air-heater is 20000-60000m3/ h, pressure 800-1200daPa.
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| CN109628944A (en) * | 2018-12-29 | 2019-04-16 | 佛山市诚德新材料有限公司 | A kind of annealing and pickling system of stainless steel band |
| CN110358907A (en) * | 2019-07-19 | 2019-10-22 | 武汉山力板带技术工程有限公司 | A kind of strip cooling device, system and method |
| CN112609059A (en) * | 2020-12-10 | 2021-04-06 | 浙江海亮股份有限公司 | Chain type annealing furnace and pipe conveying control method |
| CN115058582A (en) * | 2022-07-14 | 2022-09-16 | 上海曙佳科技发展有限公司 | Method for visualization and workpiece temperature management in continuous annealing furnace |
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