CN108220566A - Compact fine grain high-strength plate output strip line flexible manufacturing method - Google Patents
Compact fine grain high-strength plate output strip line flexible manufacturing method Download PDFInfo
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- CN108220566A CN108220566A CN201611187911.5A CN201611187911A CN108220566A CN 108220566 A CN108220566 A CN 108220566A CN 201611187911 A CN201611187911 A CN 201611187911A CN 108220566 A CN108220566 A CN 108220566A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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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
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- 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 compact fine grain high-strength plate output strip line flexible manufacturing method, including：Uncoiling pretreatment section, cleaning section, straight fiery bringing-up section, section is batched in magnetic composite sensing bringing-up section, quick soaking zone, rapid chilling section, smooth section of tensioning aligning and post processing in length and breadth；Straight fire bringing-up section is running plate band from initial temperature to the heating in section 600 ~ 700 DEG C maximum；Magnetic composite sensing bringing-up section forms fast heating at high temperature section for the composite sensing of the magnetic in length and breadth heating furnace that longitudinal magnetic flux sensing heating and transverse magnetic flux sensing heating are combined in length and breadth, the heating of 600 700 DEG C of temperature ranges of strip is responsible in wherein vertical magnetic heating, and the heating of 600 1200 DEG C of temperature ranges is responsible in horizontal magnetic heating；The initial temperature that the two is begun to warm up is according to steel grade and production heating efficiency flexible combination, and to meet the quick heating in the recrystallization high temperature section section of Strip, the rate of heat addition is in 50 1000 DEG C/s；The soaking time of quick soaking zone is in 0 40s, and rapid chilling section is quickly cooled down strip, 50 1000 DEG C/s of average cooling rate.
Description
Technical field
The present invention relates to Plate Production field more particularly to a kind of compact fine grain high-strength plate output strip line flexible manufacturings
Method.
Background technology
Currently, the strip steel product in steel industry is varied, can substantially be divided into structural steel, deep punching steel, face by purposes
Several major class such as slab.Strip structural steel product is applied to all conglomeraties such as engineering machinery, container and automobile, this kind of steel more
Surrender and tensile strength requirement to material is high, and with being continuously increased for vehicle loss of weight demand, this kind of steel is constantly to high-strength or super
High-strength direction is developed, while requirement keeps higher plasticity again, that is, obtains high strength and ductility, typical steel grade have DP steel, TRIP steel,
Complex phase CP steel, TWIP steel, Q＆P steel, boron steel etc.；Strip deep punching steel is applied to household electrical appliances, stamping parts of automobile etc. more, this kind of steel it is strong
Spend of less demanding but more demanding to the plastically deformed performance of material, typical steel grade has SPCC steel, DC steel etc.；Third major class
Strip steel is panel steel, stresses the surface quality of product in particular, mostly applied to home appliance panel, car panel etc., the production of these steel
Product ingredient has no too many difference with first two, is concentrated in Coating processing.
The type of more than three categories strip steel product is substantially jointly true by the heat treatment process after the ingredient of steel grade and rolling
It is fixed.For example, deep-draw template strip is generally ordinary low-carbon steel or low-carbon alloy steel, manufacturing method is obtained by steel-making and continuous casting
The slab of neccessary composition is obtained, hot rolled or cold rolling obtains certain thickness Strip, is heat-treated using bell-type or continuous annealing
Tissue and mechanical performance needed for obtaining；And to the high-strength steel kind such as DP steel, in addition to adjusting suitable carbon in steel making working procedure
Outside ingredient, generally also need to add the alloying components such as necessary Cr, Mo, Nb, then quench by being quickly cooled down for continuous annealing
Burning hot processing is so as to obtain higher mechanical strength and corresponding high-strength steel structure.Such as the existing production stream that Fig. 1 is Strip steel
Journey, after smelting iron, making steel refining, continuous casting, hot rolling, section cooling, pickling, cold rolling, bell-type or continuous annealing heat treatment, coating
The basic working procedures such as processing, wherein ironmaking, steel-making refining and continuous casting working procedure by adjust carbon content and alloy obtain needed for into
Point, process is according to different heat treatment modes thereafter（Section cooling, bell-type and continuous annealing）A variety of microcosmic groups can be produced respectively
Knit the strip steel product with mechanical performance.Fig. 1 can be seen that heat treatment procedure is that strip steel product can determine before finished product manufacture is completed
Determine the key process of product type, for example hot rolled plate can direct hot-rolled finished product coiled sheet after section cooling heat treatment（It is commonly called as black
Dermatotome is rolled up）Or hot rolled plate forms hot rolling acid-cleaning finished product coiled sheet after section cooling heat treatment through pickling（It is commonly called as graywall volume）；To cold
For rolling coiled sheet, after bell-type or continuous annealing heat treatment procedure, thousand changes can be formed using appropriate smooth or painting plating posttreatment
The ten thousand cold rolled sheet steel product changed.It is well known that metal material heat treatment process includes 3 critical process, it is material respectively
Heating, heat preservation and cooling procedure, in existing strip steel product heat treatment process, cooling procedure to the performance of material capability
It is very abundant, such as air-cooled, furnace cooling, jet cooling, oil quenching water quenching cooling etc., have and reach as high as the cold of 1000 DEG C/s
But speed, and accurately control；But to the heating process of material heat treatment, development in existing strip steel product heat treatment process
Lag, faces many defects and deficiency, specific manifestation is as follows.
1st, existing batch annealing, annealing time are long（General tens hours or several days）, efficiency it is low, strip surface matter
Measure bad, large iron and steel enterprise starts significantly to substitute cover annealing using continuous annealing process at present, but still has many people
Steel mill or small business are sought, because the limitation for facing scale of investment and product batch continues using bell-type annealing technique.At present, though
Bell-type annealing technique still has some special steel grades certain applicability, but being constantly progressive and steel industry collection with technology
The continuous promotion of moderate, no matter bell-type annealing technique has not had from steel grade, investment, small lot processing and product quality etc.
There is too many advantage that can say.
2nd, existing Strip continuous annealing process, originates from the Japan of the seventies in last century, and production efficiency compares bell-type
Annealing can be increased substantially more than nearly a hundred times, and product surface quality is good, after decades of development, modern continuous annealing technology development
Maturation is used by more and more iron and steel enterprises.But there is also larger deficiencies for modern continuous annealing process：（One）Modern continuous annealing process is
Establish in traditional heating mode, such as gas directly heats, gas fired radiant tubes heating, resistance wire radiant tube heating etc. basis
On.These mode of heatings are in low-temperature zone（<500℃）The efficiency of heating surface it is higher, the rate of heat addition can reach 30-50 at the soonest
DEG C/s, and heated in high temperature section, especially in material recrystallization temperature section（600-850 DEG C or so）, the rate of heat addition generally exists
10 DEG C/s hereinafter, thus cause modern continuous annealing unit very long, few then several PASS at most tens PASS could meet heating
The requirement of technique.The longer continuous annealing unit the more complicated, and the easy wooden dipper song of strip long-time high-speed cruising in stove, even sideslip, broken belt are given
Production and Operation and Maintenance cause larger difficulty；Meanwhile equipment is various in stove, takes up an area and invests larger, how easy contact is in strip steel furnace
In cause surface quality scratch etc. problems, it is relatively low for the steel plate of great surface quality, such as the lumber recovery of O plates；（Two）It is existing
Big for the heating furnace thermal inertia of continuous annealing process, accuracy of temperature control is poor, the product high to technological requirement（Such as Q＆P steel）Production is difficult,
Specification kind transition is difficult, and stove volume is big, heat dissipation is big, high energy consumption, discharge are more, limits Business Economic Benefit and society
The raising of benefit；Meanwhile modern annealing furnace is generally suitable for mass production condition, and with the development of social demand, to small
The requirement of batch flexible production is also higher and higher, and large-scale annealing furnace thermal inertia is big, maintenance cost is high, to novel process, product
There are larger deficiencies for the adaptability of organization of production.
3rd, in existing strip steel heat treatment process, whether bell-type annealing or continuous annealing, heating process therein
It is traditional straight fire heating or radiant heating pattern, greatly limits the promotion of the material rate of heat addition, while also limit new
The change of type product, technique and equipment technology.According to newest achievement in research（Referring to bibliography）, strip steel product tying again
Brilliant temperature section quickly heats, and coordinates soaking in short-term and be quickly cooled down（Referred to as rapid thermal treatment, english abbreviation RTA）, it can be achieved that
The intervention of material structure and mechanical performance is improved.For example, to deep-draw type SPCC steel, DC steel or IF steel etc., in quickly heating 50-
100 DEG C/more than s, you can realize that the crystal grain of material substantially refines, so as to improve material toughness, greatly improve deep drawability；To DP
High-strength steel are waited, in the case where quickly heating and coordinating soaking in short-term and condition of fast cooling, it is higher more existing annealing process to be obtained
Strength and ductility product performance, that is, improve the mechanical strength of material, while does not reduce material toughness.
For the deficiency of heat treatment process in the existing production procedure of strip steel product, domestic and international researcher has been carried out largely
Rapid thermal processing technique is studied, and the horizontal magnetic rapid heating technology being directed to is when previous research hotspot.The sense of famous foreign
Inductotherm Corp. of heating equipment manufacturer, Ajax companies of the U.S., ABP companies of Germany, FIVES companies of France etc. is answered to be dedicated to researching and developing
It can apply to the horizontal magnetic induction heating equipment of strip continuous annealing.French FIVES companies apply for a patent CN01117018.2 public affairs in China
A kind of variable horizontal Metal-magnetic needle of magnetic path width quickly heated suitable for Strip has been opened, has been applied for a patent simultaneously
CN02118444.5 discloses corresponding mating Muffle structure so that horizontal magnetic induction heating be applied to Strip quickly heating more into
One step.Chinese patent CN201410011053.3 and CN201410011044.4 application disclose a kind of for carbon steel thin plate steel company
The composite sensing of the magnetic in length and breadth heating moved back and corresponding Muffle structure, which has taken into account vertical magnetic induction heating simultaneously and horizontal magnetic induction adds
The advantages of heat is respective has more economical uniform heating effect, has good adaptation to existing most continuous annealing process
Property.But Yi Shang patent is for specific quick heating process and equipment, does not have producing line function.Patent US6608290 is then
Producing line is heated, and the simple unit operation such as batch comprising necessary uncoiling and set for the horizontal magnetic for disclosing a kind of bright annealing
It is standby, but the patent does not fully consider the matching relationship between universal gas heating and sensing heating, is lacked in the producing line of reality
Weary economy, while the producing line is it is not disclosed how produce different strip steel product.
With generally raising of the deep development and market demand end of steel industry to the enhancing requirement of product loss of weight, steel
The exploitation of new product removes the adjustment by steel grades（Add alloying element）Except, also increasingly rely on for counsel in heat treatment process pair
The contribution of new product development.But existing Steel Production Flow Chart, process is various, and unit equipment is huge more particularly to is heat-treated work
The process of skill, such as the inefficiency of bell type annealing furnace, surface quality are bad, although and the continuous annealing process of mainstream is efficient,
Surface quality is good, but there is also machine group leader, the operation Pass of strip（Pass is by a complete uplink section and downlink section group
Into）It is more, a series of problems, such as thermal inertia of heating furnace is big, specific manifestation：（1）Existing all kinds of unit long flow paths, it is interrelated
Degree is big, each production process and link may cause significant impact, machine to the quality and production and operation cost for producing product
The flexibility of group is poor.For example, the control of steel grades window is bad, to will result in rear road quality of heat treatment product not up to standard；（2）
The heating furnace of belt steel product is very long in existing heat treatment process, strip long operational time in stove, and a series of wooden dipper songs is caused to break
The production problem such as scuffing and mass defect in band, stove, meanwhile, the long heating rate of stove is slow, and the recrystal grain of product is easy to long
Greatly, the microstructure and mechanical performance of product can not further be promoted.
Invention content
The purpose of the present invention is to provide a kind of compact fine grain high-strength plate output strip line flexible manufacturing method, the flexibilities
Manufacturing method flexibly uses a variety of heating process groups using magnetic composite sensing bringing-up section in length and breadth according to different steel grades and production capacity
It closes, improves product surface quality and comprehensive mechanical performance；And production line is compact flexibly, convenient operation and control.
In order to realize above-mentioned technical purpose, the present invention adopts the following technical scheme that：
A kind of compact fine grain high-strength plate output strip line flexible manufacturing method, including：Uncoiling pretreatment section, cleaning section, straight fire
Bringing-up section, in length and breadth magnetic composite sensing bringing-up section, quick soaking zone, rapid chilling section, smooth section of tensioning aligning and post processing volume
Take section；
The uncoiling pretreatment section includes uncoiler, pinch roller, end shear and welding machine, and supplied materials strip is pre-processed；
The cleaning equipment of the cleaning section includes hot water wash, alkali cleaning or necessary pickler, is set to the stove of the entire production line
Before sub- bringing-up section, surface degreasing grease removal is carried out to strip；
It is described tensioning aligning smooth section be to strip after cooling carry out aligning and it is smooth, include an inlet and an outlet tension S rollers and
Planishing mill, to obtain the good strip of plate shape；
The post processing batches section and includes strip oiler and coiling machine, completes the strip finished product production of production post processing section；
The straight fiery bringing-up section includes straight fiery heating furnace, by combustion gas by burner spray combustion, to running plate band from initial temperature
It is heated to section 600 ~ 700 DEG C maximum；
The composite sensing bringing-up section of magnetic in length and breadth is longitudinal magnetic flux sensing heating（Referred to as vertical magnetic）With transverse magnetic flux sensing heating
（Referred to as horizontal magnetic）The composite sensing of the magnetic in length and breadth heating furnace being combined forms fast heating at high temperature section, wherein vertical magnetic heating is to negative
The heating of 600-700 DEG C of temperature range of strip is blamed, 600-1200 DEG C of temperature range heating is responsible in horizontal magnetic heating；The two is begun to warm up
Initial temperature according to steel grade and production heating efficiency flexible combination, to meet the fast of the recrystallization high temperature section section of Strip
Speed heating, the rate of heat addition is between 50-1000 DEG C/s；
The quick soaking zone includes radiant tube heating or the heating of resistance wire band and jet heating equipment, realizes efficiently quick
Soaking strip, the time of quick soaking is 0-40s；
The rapid chilling section includes jet cooling equipment and/or aerosol or water quenching cooling equipment, and strip is quickly cooled down,
50-1000 DEG C of average cooling rate/s.
The rate of heat addition of the composite sensing heating furnace of magnetic in length and breadth is 100-350 DEG C/s.
The cooling velocity of the rapid chilling section is 100-500 DEG C/s.
The composite sensing bringing-up section of magnetic in length and breadth, to carbon steel Strip, the section that vertical magnetic induction is made to be heated to be 600-700 DEG C
Quick heating, horizontal magnetic induction are heated to be 700-900 DEG C of quick heating.
The composite sensing bringing-up section of magnetic in length and breadth, to stainless steel plate strip, is all heated to be 600-1200 by horizontal magnetic induction
The quick heating in DEG C section, vertical magnetic induction heating unit at this time are closed.
The overlapped flexible selection of temperature range of the composite sensing of the magnetic in length and breadth bringing-up section and the straight fiery bringing-up section, i.e.,
Straight fire section is responsible for less than 600 or 700 DEG C of temperature range heating, and magnetic composite sensing bringing-up section is responsible for 600 or more than 700 in length and breadth
The heating of temperature range is flexibly selected according to different unit speeds and production capacity, forms three kinds of flexible heating process：
（1）Plus vertical 600-700 DEG C of magnetic plus horizontal 700 DEG C of magnetic or more below straight 600 DEG C of section of fire；
（2）Plus horizontal 700 DEG C of magnetic or more below straight 700 DEG C of section of fire；
（3）Plus horizontal 600 DEG C of magnetic or more below straight 600 DEG C of section of fire.
The straight fiery bringing-up section and in length and breadth magnetic composite heating section composition vertical heater, and be installed on vertical heater uplink section or
Straight fire bringing-up section and in length and breadth magnetic composite heating section are respectively arranged in the uplink section of vertical heater and downlink section, and complete one of composition is complete
Uplink section and downlink section.
The quick soaking zone is respectively arranged in the furnace roof of vertical heater and downlink section, and with the rapid chilling section of downlink section
It matches；Or quick soaking zone collectively forms a complete uplink section and downlink section with rapid chilling section.
The cleaning equipment uses flame cleaning equipment, directly carries out degreasing degreasing to strip surface, while have both preheating
Strip acts on.
The soaking time of the quick soaking zone is within 20s.
The output strip line flexible manufacturing method further includes hot dip section, and the hot dip section includes hot-dip galvanized pan, sinking
Roll assembly and alloying furnace, hot dip section is between soaking zone and rapid chilling section.
The output strip line flexible manufacturing method further includes straightening equipment, and it is smooth with aligning that straightening equipment is located at cooling section
Between section；The straight fiery bringing-up section and magnetic induction bringing-up section use horizontal chamber furnace (oven) form.
The core of compact fine grain high-strength plate output strip line flexible manufacturing method of the present invention is：Add using magnetic in length and breadth is compound
The high temperature section that hot arc is responsible for Strip quickly heats, and according to steel grade difference, high temperature section section selects between 600-1200 DEG C, area
Between the rate of heat addition between 50-1000 DEG C/s, the preferred rate of heat addition be 100-350 DEG C/s sections.Because material is in above-mentioned temperature
The quick heating in degree section can have an impact the recrystallization temperature of material and phase transformation, and it is 100- to be embodied in the rate of heat addition
350 DEG C/s sections, the recrystallization temperature of material increase substantially, and time of the material in recrystallization zone is big caused by quickly heating
Amplitude shortens, so as to hinder growing up for material crystal grain.And then by soaking zone in short-term, into jet or aerosol or water quenching
But section so that recrystallization material is quickly cooled down, and for cooling velocity between 50-1000 DEG C/s, preferred cooling velocity is 100-
Between 500 DEG C/s so that material obtains the tissues such as the martensite of high-strength performance under condition of fast cooling, and due to material crystal grain
Have little time under the conditions of growing up, organize crystal grain refinement so that material keeps good toughness and extension property, i.e., material obtain compared with
High strength and ductility.
Compared with prior art, the present invention advantage is：
（1）One fine grain high-strength plate output strip line is by necessary uncoiling and batches and waits unit operations equipment, by straight fire heating and
Magnetic composite sensing heating in length and breadth forms the uplink section of vertical heater, then forms downlink section by jet or aerosol or water quenching cooling section, so
Afterwards strip finished product can be produced using aligning is smooth.Compared to existing continuous annealing unit, production line of the invention is only by one
Pass or 2 Pass realizes the rapid thermal treatment of heating and the cooling of strip, and entire unit flexible compact takes up little area, investment
It is small, and the thermal inertia of entire unit is small, the thermal efficiency is high, and unit roller row are greatly reduced, and reduces maintenance cost and effectively reduces band
Steel scratches, and improves product surface quality.
（2）The output strip line flexible manufacturing method of the present invention is because quick heating is to the shadow of material recrystallized structure performance
It rings so that the tissue crystal grain refinement of product increases substantially the deep drawability of material；To high-strength steel, mechanical strength can improved
While, it does not reduce material plasticity substantially, that is, obtains high strength and ductility product.Kinds of processes combination point can be used in the production line unit
The a variety of strip finished products of the flexible manufacturings such as hard material are rolled in other places reason hot-rolled black-skin volume, hot rolling acid-cleaning volume and cold rolling.General carbon is rolled up in reality
While the raising of existing material mechanical strength, the grain size number of material is increased substantially, improves the deep drawability of material.To low
The high-strength steel of the trade mark realizes being substantially improved for product mechanical performance under conditions of steel grades are constant, realizes product up-gradation.
（3）For the output strip line flexible manufacturing method of the present invention compared to existing production procedure, which can
The window of steel grades is widened, is advantageously implemented the stability of the consistent production of entire steel flow, and then improves product warp
Ji benefit.
Description of the drawings
Fig. 1 is existing Strip production procedure schematic diagram；
Fig. 2 is compact fine grain high-strength plate output strip line schematic diagram of the present invention（Embodiment one）；
Fig. 3 is the heat treatment cycle curve of compact fine grain high-strength plate output strip line flexible manufacturing method of the present invention；Fig. 4 is this
Invention compact fine grain high-strength plate output strip line schematic diagram（Embodiment two）；
Fig. 5 is compact fine grain high-strength plate output strip line schematic diagram of the present invention（Embodiment three）.
In figure：1 uncoiler, 2 strips（Strip）, 3 pinch rollers, 4 end shears, 5 welding machines, 6 cleaning equipments, 7 correction slewing rollers,
8 sealed rollers, 9 straight fiery heating furnaces, 10 magnetic composite sensing heating furnace, 10 scanning thermometers, 12 slewing rollers, 13 resistance wire bands add in length and breadth
Heat（Resistance soaking zone）, 14 jet heating equipments（Jet soaking equipment）, 15 jets cooling equipment, 16 aerosols or water quenching cooling are set
It is standby, 17 air knives, 18 entrance tension S rollers, a 19 survey rollers, the 20 anti-anti-crease rollers that quiver, 21 planishing mills, 22 oilers, 23 coiling machines,
24 furnace bodies；25 hot-dip galvanized pans, 26 sinking roll assemblies, 27 alloying furnaces.
Specific embodiment
The invention will be further described in the following with reference to the drawings and specific embodiments.
Embodiment one
Referring to Fig. 2, a kind of compact fine grain high-strength plate output strip line flexible manufacturing method, including：Uncoiling pretreatment section, cleaning
Section, straight fiery bringing-up section, in length and breadth magnetic composite sensing bringing-up section, quick soaking zone, rapid chilling section, smooth section of tensioning aligning and after
Section is batched in processing.
The uncoiling pretreatment section includes uncoiler 1, pinch roller 2, end shear 4 and welding machine 5, and pre- place is rolled up to supplied materials strip
Reason so that production line can continuous and steady operation；In the present embodiment, strip refers mainly to strip 2.
The cleaning equipment 6 of the cleaning section includes hot water wash, alkali cleaning or necessary pickler, is set to the entire production line
Stove bringing-up section before, to strip carry out surface degreasing grease removal；Cleaning equipment 6 can be clear by traditional alkali cleaning, hot water wash or flame
The cleaning section for forming production line, the 6 preferred flame cleaning equipment of cleaning equipment, i.e., using flame combustion oil removing mode such as wash, you can
Meet cleaning belt steel surface requirement, and strip low temperature can be preheated.
The straight fiery bringing-up section includes straight fiery heating furnace 9, by combustion gas（Coal gas or natural gas）By burner spray combustion, bear
It blames and section 600 ~ 700 DEG C maximum is heated to from initial temperature to running plate band 2；
The composite sensing bringing-up section of magnetic in length and breadth is longitudinal magnetic flux sensing heating（Referred to as vertical magnetic）With transverse magnetic flux sensing heating
（Referred to as horizontal magnetic）The composite sensing of the magnetic in length and breadth heating furnace 10 that is combined forms fast heating at high temperature section, wherein vertical magnetic heating to
It is responsible for the heating of 600-700 DEG C of temperature range of strip, 600-1200 DEG C of temperature range heating is responsible in horizontal magnetic heating；The two starts to add
The initial temperature of heat is according to steel grade and production heating efficiency flexible combination, to meet the recrystallization high temperature section section of Strip
Quick heating, the rate of heat addition is between 50-1000 DEG C/s.For carbon steel Strip, the recrystallization device temperature of heating is generally 9
00 DEG C hereinafter, i.e. the heating interval of magnetic composite sensing bringing-up section is in length and breadth：The section that vertical magnetic induction is heated to be 600-700 DEG C is quick
Heating, the section that horizontal magnetic induction is heated to be 700-900 DEG C are quickly heated, and the rate of heat addition during which is 50-500 DEG C/s, preferably
Rate of heat addition section is between 100-350 DEG C/s；For stainless steel plate strip, the temperature range of heating for 600 or 700 DEG C with
Between 1000-1200 DEG C, the quick heating in 600-1200 DEG C of section is all heated to be by horizontal magnetic induction, the rate of heat addition is
100-350 DEG C/s, vertical magnetic induction heating unit at this time is closed.
Meanwhile according to steel grade and production capacity, the temperature of the composite sensing of the magnetic in length and breadth bringing-up section and the straight fiery bringing-up section
Degree section is overlapped flexibly to select different technique, i.e., straight fiery section is responsible for less than 600 or 700 DEG C of temperature range heating, and
Magnetic composite sensing bringing-up section is responsible for the heating in 600 or 700 temperatures above sections in length and breadth, according to different unit speeds and production capacity
Flexibly selection forms three kinds of flexible heating process：（1）600-700 DEG C is heated below straight 600 DEG C of section of fire plus vertical magnetic induction to add
Horizontal magnetic induction heats 700 DEG C or more；（2）700 DEG C or more are heated plus horizontal magnetic induction below straight 700 DEG C of section of fire, indulges magnetic strength at this time
It should heat and not work；（3）Below straight 600 DEG C of section of fire 600 DEG C or more are heated plus horizontal magnetic induction.
The straight fiery bringing-up section and magnetic composite heating section composition vertical heater, and be installed on vertical heater in length and breadth（Furnace body 24）It is upper
Row section or directly fire bringing-up section and in length and breadth magnetic composite heating section are respectively arranged in the uplink section of vertical heater and downlink section, composition one
Complete uplink section and downlink section（Pass）.
The quick soaking zone includes radiant tube heating or resistance wire band heating 13 and jet heating equipment 14, realizes high
Imitate quick soaking strip；Resistance wire band heating 13（Soaking）It is responsible for the heat preservation of furnace roof, jet heating equipment 14 is responsible for material
Quick soaking in short-term, within soaking time 0-40s, preferably 20s；The quick soaking zone is respectively arranged in vertical heater
Furnace roof and downlink section, and matched with the rapid chilling section of downlink section；If because unit speed is higher, soaking zone can be by unit
Downlink section is further added by a uplink section, then again with rapid chilling section arrange in pairs or groups connect, collectively form a complete uplink section with
Downlink section.
The rapid chilling section includes jet cooling equipment 15 and/or aerosol or water quenching cooling equipment 16, and strip is carried out
It is quickly cooled down, 50-1000 DEG C of average cooling rate/s, preferably 100-500 DEG C/s.
It is described tensioning aligning smooth section be to strip after cooling carry out aligning and it is smooth, include an inlet and an outlet tension S
Roller 18 and planishing mill 21 and necessary survey open roller 19 and a vibration-resistant roller 20, are collectively responsible for strip surface and plate shape etc. and are put down
Whole processing, to obtain the good strip of plate shape；
The post processing batches section and includes strip oiler 22 and coiling machine 23, completes the strip finished product life of production post processing section
Production.
More than production line is removed comprising necessary slewing rollers 7 and 12, sealed roller 8, air knife 17 and the external furnace body knot in Fig. 2
Structure 24 etc., production line also may include other necessary equipment such as such as kink according to different working conditions and requirement.
The core of the production line flexible manufacturing method of the present invention be comprising magnetic composite sensing bringing-up section in length and breadth, can make strip from
600 DEG C or 700 DEG C or more quickly heat up to recrystallization temperature section, and the rate of heat addition is preferred to heat between 50-1000 DEG C/s
Rate is between 100-350 DEG C/s, then by soaking zone and rapid chilling section in short-term.Quick heating with steel material high temperature section
There are two big advantages：（1）Quick heating can improve the recrystallization temperature of material, quick to heat compared to traditional annealing heating process
So that recrystallization device just occurs at a higher temperature for material, since higher recrystallization device temperature accelerates the ingredients such as carbide
Diffusion, material recrystallization are easy to complete simultaneously；（2）Due to quickly heating, the time that material is in recrystallization temperature section is very short
（Generally less than several seconds）, in conjunction with soaking in short-term and it is quickly cooled down, material crystal grain, which has little time to grow up just to be cooled, to be fixed up, from
And can significantly crystal grain thinning, the grain size number of material is improved, so as to improve the deep drawability of strip.Meanwhile because of material
Rapid quenching effect, material be easy to generate the high-strength tissue such as martensite, thus is provided with while improves Material Strength and toughness
Effect, i.e. material strength and ductility product improve, so as to which comprehensive mechanical performance improves.
Compact fine grain high-strength plate output strip line flexible manufacturing method of the present invention is exactly to contain magnetic composite sensing in length and breadth
Bringing-up section has the ability of quick heating, so that the length of production line is compared to traditional annealing process and unit substantially
Degree shortens, and the complexity of unit significantly declines.The bringing-up section of production line of the present invention can be in the upper of a Pass of vertical heater
Row section is completed, meanwhile, soaking zone can be completed in the downlink section of vertical heater in short-term, i.e. the entire quick heating and soaking of production line
Journey only only takes up a Pass stroke（Uplink section+downlink section）, meanwhile, the rapid cooling section of production line also only only takes up a downlink
Section, so that entire unit is short and small compact.It is well known that traditional annealing furnace bringing-up section and soaking zone have tens Pass rows
Journey, unit very bulky complex, strip long operational time in stove, it is prone to which broken belt wooden dipper Qu Wenti, furnace rolls row are various, increase
Add production and maintenance cost, and contacted with the strip and be prone to surface tear mass defect, and the production line of the present invention is short and small
It is compact, compared to traditional annealing furnace, investment and occupation of land are saved, while reduce production cost and maintenance cost, and belt steel surface
Quality is good；Meanwhile the production line is compared to traditional bell type annealing furnace, production efficiency is significantly and excellent surface quality.
In addition, the thermal inertia very little of the production line, can shut down at any time, and it is equally applicable to thin hot rolled coil and cold rolling coil, it is non-
Often suitable small lot flexible manufacturing.
Fig. 3 is the heat treatment cycle curve of compact fine grain high-strength plate output strip line flexible manufacturing method of the present invention.I pairs
Ying Yuzhi fire bringing-up sections, the temperature spot T1 of heating is 600 DEG C or 700 DEG C；II and II ＇ are heated corresponding to magnetic composite sensing in length and breadth
Section, the temperature spot T2 and T3 of heating are respectively 800-900 DEG C or 1000-1200 DEG C, and wherein carbon steel material corresponds to T2 temperature
Point, stainless steel correspond to T3 temperature spots；III corresponds to soaking zone in short-term, the time of time of soaking between t2~t3
Interval, generally<40s, preferably soaking time is in short-term<20s；IV corresponds to rapid cooling section, and cooldown rate is according to steel grade and cooling
Mode difference is between 50-1000 DEG C/s, preferably between 100-500 DEG C/s.The selection of different heating section temperature spot can root
It is determined jointly according to factors such as steel grade and production capacity, corresponding to three kinds of different technological parameters.
Specific embodiment 1：One general carbon cold-rolled steel rolls hard volume kind, such as SPCC, DC steel etc., selects straight fiery bringing-up section extremely
600 DEG C, add 600-700 DEG C of vertical magnetic induction heating, add 700-850 DEG C of horizontal magnetic induction heating；Or straight fiery bringing-up section adds to 600 DEG C
600-850 DEG C of horizontal magnetic induction heating.Soaking<20s, jet and aerosol cooling, can obtain intensity higher, crystal grain refinement up to 50%,
The deep drawability r values of material improve 50%.
Specific embodiment 2：One stainless-steel cold-rolling rolls hard volume kind, such as 304, and straight fiery section is selected to add 700- to 700 DEG C
1100 DEG C of horizontal magnetic induction heating.
Specific embodiment 3：General carbon or low alloy hot rolling casting skin volume or pickling volume, thickness<3mm, preferably<2mm passes through
The compound quick heating of magnetic and soaking in short-term are quickly cooled down in length and breadth, can obtain fine grain high-strength steel.Former general carbon component volume is not only carried
High Material Strength, while crystal grain thinning improves the punching performance of material；Former low-alloy can be obtained into bundling compared to traditional handicraft
The high-strength steel of higher intensity realizes properties of product upgrading.
Embodiment two
Fig. 4 is the another form of production line of the present invention, and bringing-up section uses horizontal chamber furnace (oven) form, and bringing-up section includes straight fiery bringing-up section
With magnetic induction bringing-up section, it is suitble to the flexible manufacturing of the hot-rolled sheet coil of thicker material.Compared to shown in Fig. 2, the production line of Fig. 4 increases
Straightening equipment, straightening equipment are located between cooling section and smooth section of aligning, facilitate the smooth of later process.
Embodiment three
Fig. 5 is the another form of production line of the present invention, and compared to production line shown in Fig. 2, which removes answers with magnetic in length and breadth
It closes outside sensing heating section, contains the hot dip section being made of hot-dip galvanized pan 25, sinking roll assembly 26 and alloying furnace 27 simultaneously,
For hot dip section between soaking zone and rapid chilling section, the flexible manufacturing of hot dip finished product rolled up firmly is rolled in suitable cold rolling, is equally had
The characteristics of flexible compact.
The core of compact fine grain high-strength plate output strip line flexible manufacturing method of the present invention is compound using magnetic in length and breadth
Sensing heating section, magnetic composite sensing bringing-up section has the rapid heating capability of 100-350 DEG C/s in length and breadth for this, short in conjunction with jet etc.
The rapid chilling sections such as Shi Junre and aerosol produce the high-strength Strip of fine grain.Meanwhile the present invention can be according to different steel grades and production energy
Power is flexibly combined using a variety of heating process, and while rolling up hot rolling and cold rolling carbon so that improving Material Strength, crystal grain is thin
Change, greatly improve the mechanical performance of material；To hot rolling or cold rolling low-alloy or alloy volume can simultaneously material strength and ductility product, improve material
Expect comprehensive mechanical performance, realize high-strength steel performance upgrade.The production line is compact, and flexibly thermal inertia is small, convenient operation and control, takes up an area
Scalp is few, and production and maintenance cost is greatly reduced compared to conventional anneal unit, can improve product surface quality and comprehensive mechanical
Performance.
The content of present invention and claim are not limited solely to embodiment range shown in figure, such as production line are added
The equipment such as necessary other such as kinks, double uncoilings and the change of other production line collocation modes etc. is added to be weighed in the present invention
Within sharp claimed range.
Claims (12)
1. a kind of compact fine grain high-strength plate output strip line flexible manufacturing method, including：It is uncoiling pretreatment section, cleaning section, straight
Fiery bringing-up section, in length and breadth magnetic composite sensing bringing-up section, quick soaking zone, rapid chilling section, smooth section of tensioning aligning and post processing
Batch section；
The uncoiling pretreatment section includes uncoiler, pinch roller, end shear and welding machine, and supplied materials strip is pre-processed；
The cleaning equipment of the cleaning section includes hot water wash, alkali cleaning or necessary pickler, is set to the stove of the entire production line
Before sub- bringing-up section, surface degreasing grease removal is carried out to strip；
It is described tensioning aligning smooth section be to strip after cooling carry out aligning and it is smooth, include an inlet and an outlet tension S rollers and
Planishing mill, to obtain the good strip of plate shape；
The post processing batches section and includes strip oiler and coiling machine, completes the strip finished product production of production post processing section；
It is characterized in that：
The straight fiery bringing-up section includes straight fiery heating furnace, by combustion gas by burner spray combustion, to running plate band from initial temperature
It is heated to section 600 ~ 700 DEG C maximum；
The composite sensing bringing-up section of magnetic in length and breadth is longitudinal magnetic flux sensing heating（Referred to as vertical magnetic）With transverse magnetic flux sensing heating
（Referred to as horizontal magnetic）The composite sensing of the magnetic in length and breadth heating furnace being combined forms fast heating at high temperature section, wherein vertical magnetic heating is to negative
The heating of 600-700 DEG C of temperature range of strip is blamed, 600-1200 DEG C of temperature range heating is responsible in horizontal magnetic heating；The two is begun to warm up
Initial temperature according to steel grade and production heating efficiency flexible combination, to meet the fast of the recrystallization high temperature section section of Strip
Speed heating, the rate of heat addition is between 50-1000 DEG C/s；
The quick soaking zone includes radiant tube heating or the heating of resistance wire band and jet heating equipment, realizes efficiently quick
Soaking strip, the time of quick soaking is in 0-40s；
The rapid chilling section includes jet cooling equipment and/or aerosol or water quenching cooling equipment, and strip is quickly cooled down,
50-1000 DEG C of average cooling rate/s.
2. compact fine grain high-strength plate output strip line flexible manufacturing method according to claim 1, it is characterized in that：It is described
The rate of heat addition of magnetic composite sensing heating furnace is 100-350 DEG C/s in length and breadth.
3. compact fine grain high-strength plate output strip line flexible manufacturing method according to claim 1 or 2, it is characterized in that：
The cooling velocity of the rapid chilling section is 100-500 DEG C/s.
4. compact fine grain high-strength plate output strip line flexible manufacturing method according to claim 2, it is characterized in that：It is described
Magnetic composite sensing bringing-up section in length and breadth to carbon steel Strip, makes the section that vertical magnetic induction is heated to be 600-700 DEG C quickly heat, horizontal
Magnetic induction is heated to be 700-900 DEG C of quick heating.
5. compact fine grain high-strength plate output strip line flexible manufacturing method according to claim 2, it is characterized in that：It is described
Magnetic composite sensing bringing-up section in length and breadth to stainless steel plate strip, is all heated to be the quick of 600-1200 DEG C of section by horizontal magnetic induction
Heating, vertical magnetic induction heating unit at this time are closed.
6. compact fine grain high-strength plate output strip line flexible manufacturing method according to claim 1, it is characterized in that：It is described
The overlapped flexible selection of temperature range of magnetic composite sensing bringing-up section and the straight fiery bringing-up section in length and breadth, i.e., straight fiery section are responsible for
Less than 600 or 700 DEG C of temperature range heating, and magnetic composite sensing bringing-up section is responsible for 600 or 700 temperatures above sections in length and breadth
Heating, flexibly selects according to different unit speeds and production capacity, forms three kinds of flexible heating process：
（1）Plus vertical 600-700 DEG C of magnetic plus horizontal 700 DEG C of magnetic or more below straight 600 DEG C of section of fire；
（2）Plus horizontal 700 DEG C of magnetic or more below straight 700 DEG C of section of fire；
（3）Plus horizontal 600 DEG C of magnetic or more below straight 600 DEG C of section of fire.
7. compact fine grain high-strength plate output strip line flexible manufacturing method according to claim 1, it is characterized in that：It is described
Straight fire bringing-up section and magnetic composite heating section forms vertical heater in length and breadth, and be installed on vertical heater uplink section or straight fiery bringing-up section with
Magnetic composite heating section is respectively arranged in the uplink section of vertical heater and downlink section in length and breadth, forms a complete complete uplink section under
Row section.
8. compact fine grain high-strength plate output strip line flexible manufacturing method according to claim 1, it is characterized in that：It is described
Quick soaking zone be respectively arranged in the furnace roof of vertical heater and downlink section, and match with the rapid chilling section of downlink section；Or
Quick soaking zone collectively forms a complete uplink section and downlink section with rapid chilling section.
9. compact fine grain high-strength plate output strip line flexible manufacturing method according to claim 1, it is characterized in that：It is described
Cleaning equipment uses flame cleaning equipment, directly carries out degreasing degreasing to strip surface, while has both the effect of preheating table band.
10. compact fine grain high-strength plate output strip line flexible manufacturing method according to claim 1, it is characterized in that：Institute
The soaking time for stating quick soaking zone is within 20s.
11. compact fine grain high-strength plate output strip line flexible manufacturing method according to claim 1, it is characterized in that：Institute
It states output strip line flexible manufacturing method and further includes hot dip section, the hot dip section includes hot-dip galvanized pan, sinking roll assembly and conjunction
Aurification stove, hot dip section is between soaking zone and rapid chilling section.
12. compact fine grain high-strength plate output strip line flexible manufacturing method according to claim 1, it is characterized in that：Institute
It states output strip line flexible manufacturing method and further includes straightening equipment, straightening equipment is located between cooling section and smooth section of aligning；Institute
It states straight fiery bringing-up section and magnetic induction bringing-up section uses horizontal chamber furnace (oven) form.
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| CN111705207A (en) * | 2020-06-28 | 2020-09-25 | 嘉兴吉森科技有限公司 | Heat treatment device and heat treatment leveling method for stainless steel belt for conveyor belt |
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| CN115181884A (en) * | 2021-04-02 | 2022-10-14 | 宝山钢铁股份有限公司 | 1280 MPa-grade low-carbon low-alloy hot-dip galvanized Q & P steel and rapid heat treatment hot-dip galvanizing manufacturing method |
| CN115181884B (en) * | 2021-04-02 | 2023-08-11 | 宝山钢铁股份有限公司 | 1280 MPa-level low-carbon low-alloy hot dip galvanized Q & P steel and rapid heat treatment hot dip galvanizing manufacturing method |
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Application publication date: 20180629 |