CN101755058A - Be used for method that the steel band that is formed from steel is carried out hot rolling and heat-treats - Google Patents
Be used for method that the steel band that is formed from steel is carried out hot rolling and heat-treats Download PDFInfo
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- CN101755058A CN101755058A CN200880021446A CN200880021446A CN101755058A CN 101755058 A CN101755058 A CN 101755058A CN 200880021446 A CN200880021446 A CN 200880021446A CN 200880021446 A CN200880021446 A CN 200880021446A CN 101755058 A CN101755058 A CN 101755058A
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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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- 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
- C21D8/0252—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with application of tension
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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
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
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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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0426—Hot rolling
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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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
- C21D8/0452—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment with application of tension
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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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
- C21D8/0463—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment following hot rolling
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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
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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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
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
- C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
Abstract
The present invention relates to a kind of method that the steel band (1) that is formed from steel is carried out hot rolling and heat-treats of being used for.In order be in steel band equipment to make the steel band of the high-intensity and very high strength with enough toughness comparatively economically, this method has been stipulated following steps: a) heat remaining rolling slab; B) slab rolling is arrived desired thickness of strips; C) steel band (1) is cooled off, wherein steel band (1) has the envrionment temperature of being higher than (T after cooling
0) temperature; D) steel band (1) is wound into winding (2); E) make steel band (1) go up uncoiling from described winding (2); F) steel band (1) is heated; G) steel band (1) is cooled off; And h) transport steel band (1), wherein steel band (1) is at f set by step) heating before have the envrionment temperature of being higher than (T
0) temperature.
Description
Technical field
The present invention relates to a kind of method that the steel band that is formed from steel is carried out hot rolling and heat-treats of being used for.
Background technology
The quenching of steel member and tempering subsequently are the popular ways.Reach this point thus, promptly can regulate the desired combination of the intensity and the toughness of material targetedly.Use when also in sheet material equipment, making the steel plate of higher-strength on this technological principle.This technology obtains explanation in EP 1764423A1.Here slab is heated and in the plate mill frame, divide the roughing of a plurality of reversing passage after the final thickness with sheet material with very high velocity ratio as cool to room temperature always, that is to say and finish quenching process.Be drawing process following closely, that is to say steel band is heated to once more such as 600 ℃, cool off once again subsequently.Thus can be in the plate mill frame make sheet material with very little batch neatly with different performances.
As the same in the field that sheet material is made, in the steel band manufacturing, the demand of steel grade with very high intensity be that is to say that demand to the steel of so-called high-intensity and very high strength is also in continuous increase.Wherein, these materials are applied on automobile, lifting machine, container and the pipe.
Summary of the invention
Therefore, task of the present invention provides a kind of method, utilizes this method can make the steel band of the high-intensity and very high strength with enough toughness comparatively economically in steel band equipment.Especially thus should be able to advantageously make QT (Q: quenching; T: tempered)-steel.
The solution of this task of the present invention is characterised in that described method has following steps:
A) heat remaining rolling slab;
B) slab rolling is arrived desired thickness of strips;
C) steel band is cooled off, wherein steel band has the temperature that is higher than envrionment temperature substantially after cooling;
D) with steel coil strip coiled winding;
E) make steel band uncoiling from the described winding;
F) steel band is heated;
G) steel band is cooled off; And
H) transport steel band,
Wherein, described steel band is at f set by step) heating before have the temperature that is higher than envrionment temperature.
Described winding in a kind of preferred design of the present invention at implementation step d) time is on the station of reeling, wherein said winding is at implementation step e) time preferably be in one spatially away from the uncoiling station at described coiling station and wherein said winding at step d) and e) between with the station adiabatic situation of reeling under may flow to the uncoiling station by an adiabatic winding storer.
Step e) can follow closely after step d) immediately carries out.
Described steel band is at c set by step) and/or cooling period of step g) or cooling after stand the aligning process.This steel band is at e set by step) uncoiling and f set by step) heating between also can stand the aligning process.This steel band can be at f set by step in addition) heating and h set by step) transport between stand the aligning process.Can turn to the aligning process mentioned of carrying out by making steel band center on sinking roller, deflector roll, pinch roll or other roller.
Described aligning process is carried out on so-called skin-pass frame (Skin-Pass-Ger ü st) through the steel band deflector roll of adjustment or according to a kind of special embodiment of the present invention in other words with roller leveler usually.
Described steel band also can stand the aligning process in the process by the heating of top step f).
The c set by step of steel band) cooling can comprise stratiform cooling and rearmounted reinforcement cooling.The g set by step of steel band) cooling also can comprise stratiform cooling or scheme or additional project comprise air cooling as an alternative.
At least several parts of refrigerating unit can be configured to district's band refrigerating unit, and described district band refrigerating unit works in the width of steel band scope by band ground, district.
The cooling of steel band also can be carried out with high-pressure section (Hochdruckbalken), can clean de-scaling in other words to steel band simultaneously thus.
The f set by step of steel band) heating can comprise induction heating.In this scheme as an alternative, also can carry out directly loading flame to steel band.Preferred regulation under latter event has preferably almost by having at least 75% oxygen that the gas-jet of pure oxygen directly loads flame to steel band, has mixed gasiform or liquid fuel in this gas-jet.
A kind of improvement project regulation is carried out induction heating to steel band under rare gas element (shielding gas).
The h set by step of steel band) the process of transporting can comprise the coiling of steel band.The h set by step of steel band) the process of transporting also can comprise separates this process with the part of the tabular cutting of steel band.
Described steel band is preferably at c set by step) cooling before have at least 750 ℃ temperature.
Described steel band is preferably at c set by step) cooling after and at d set by step) coiling before have at least 25 ℃ and the highest 400 ℃ of preferred temperature between 100 ℃ and 300 ℃.
In addition, a kind of improvement project regulation, described steel band is at f set by step) heating after have at least 400 ℃ of preferably temperature between 400 ℃ and 700 ℃.But, described steel band is preferably at g set by step) cooling after and at h set by step) the process of transporting before have the highest 200 ℃ of preferred temperature between 25 ℃ and 200 ℃.
The heating of steel band can be carried out with different degree in the width of steel band scope.
Can stipulate that at last step e) is to g) implement in the operation in reversing, use to be in g set by step for this reason) the coiling station of process of cooling back.
Can stipulate in addition, at least two positions of described steel band treatment facility, measure the planeness of steel band and/or the temperature of steel band (latter preferably measures by means of the temperature scanning instrument) for the quality of steel band is monitored.
The speed of passing of passing the steel band treatment facility of steel band, especially have the steel band heating of pass, the adjustment degree of straightening roll and/or especially relevant steel band cooling and can control adjusting in other words by process model with district's band with the district.
Last steel band can remain on by means of clamping and conveying device under the specified steel band tension force by section through the steel band treatment facility time at least.This especially is suitable in the zone of strengthening cooling section.
In order to enter clamping and conveying device, roll straightening unit with guaranteeing steel band centering or to strengthen in the refrigerating unit, preferably before these devices, arranged the steel band combination of side guides.
The embodiment that is used for the steel band that is formed from steel is carried out a kind of scheme as an alternative of hot rolling and heat-treating methods has following steps:
A) heat remaining rolling slab;
B) slab rolling is arrived desired thickness of strips;
C) steel band is cooled off, wherein steel band has the temperature that is higher than envrionment temperature after cooling;
D) steel band is wound up on one first reeling machine;
E) steel band is reversed between described first reeling machine and one second reeling machine, wherein steel band stands heating between described reeling machine, is used to implement drawing process,
Wherein steel band is at e set by step) heating before have the temperature that is higher than envrionment temperature.
This method also can be combined with the top design of mentioning.
For some materials, do not need to carry out tempering and that is to say that intensity and toughness performance just meet the requirements, also can only use step a) to arrive d after step d) for these materials).
In addition, following improvement project is verified:
Before and after the cooling of steel band, can form steel band tension force by means of clamping and conveying device.
Steel band can be guided transverse to its longitudinal center line by means of combination of side guides.Described combination of side guides especially is arranged in the stratiform cooled zones of steel band in the cooled zones of this preferred arrangements at steel band.
In addition, the combination of side guides of described steel band can be arranged in before the clamping and conveying device and after steel band head process and open and close once more for oriented tasks on the steel band afterbody.
The measurement of temperature of steel strips can be carried out by means of the low-temp radiating thermometer.The measurement of temperature of steel strips can be preferably before the refrigerating unit and/or heating unit that change temperature, within and/or carry out afterwards.
The production diversity of wide strip hot rolling unit obviously is different from the production diversity of plate mill frame.Therefore exist the high strength newly developed in a large amount of ten years in the past and the steel grade of very high strength, its performance can be by rolling strategy and/or cooling strategy are regulated targetedly.A kind of suitable method that is used for this purposes is with very high speed of cooling steel band to be quenched after rolling, next is heated to the temperature that is lower than the phase transition temperature once more.
Traditional QT steel (Q: quenching that can make by this method; T: tempered) on the plate mill frame, produces already.But, described traditional QT steel can be made in more economic mode on wide strip hot rolling unit.
In addition, on the Band by Hot-rolling unit, also can produce the steel band of thinner very high strength more reliably with littler temperature and thickness deviation and steel band planeness.Therefore, meaningful and advantageously, the production share is transferred on the strip mill unit from the plate mill frame.
What exist varied novelty in addition is not the steel grade of making on the plate mill frame.Method described here is suitable for the classification of heterogeneous steel on high degree.By means of the diversity of the temperature-time-change curve that obviously enlarges and especially by means of the structure that almost makes up arbitrarily with phase place integral part of interrupting process of cooling and the temporary transient scheme that improves temperature once more, can produce to produce at present.Exist the possibility that allows precipitation process go on and introduce second phase place like this targetedly in addition, described second phase place is being represented the feature of modern steel grade.
Passing through the method introduced in addition can adjusting function, needs higher alloy content concerning described performance in traditional course of processing.
Advantageously, when arranging rolling and process of cooling and drawing process separately, described method has handiness (not needing mixed rolling), can regulate the temperature-time-change curve of steel band neatly, and can process the winding of self or the winding of miscellaneous equipment.Also can depend on the application target of steel band or coiling property cuts winding and steel plate.The cutting of steel plate preferably that is to say when temperature is higher especially in temperature at this to be carried out during for tempering temperature.
Advantageously, when coupled arrangement described rolling and process of cooling and drawing process, can save huge especially energy, have the special-purpose reeling machine of direct transmitting function to avoid so-called clock spring problem for using the winding that is difficult to batch with bundling.In addition, can continue processing to steel band soon man-hour described steel band is provided in other words directly continuing to add.Should be mentioned that at last for mentioned decoration form has bigger possibility to influence the microstructure of steel band.
Description of drawings
Implementation column of the present invention shown in the drawings.Wherein:
Fig. 1 is the synoptic diagram of Band by Hot-rolling unit that is used to make steel band by a kind of first embodiment of the present invention,
The design of a kind of replacement scheme as Fig. 1 that Fig. 2 illustrates described Band by Hot-rolling unit,
Fig. 3 illustrates the exemplary temperature profile about the throughput direction of Band by Hot-rolling unit of steel band,
Fig. 4 illustrates intercepting theory structure part, that have the straightener of integrated reinforcement refrigerating unit of conduct by the Band by Hot-rolling unit of Fig. 1 or 2,
Fig. 5 illustrates intercepting theory structure part, that have the straightener of integrated heating unit of conduct by the Band by Hot-rolling unit of Fig. 1 or 2, and
Fig. 6 is the synoptic diagram that the Band by Hot-rolling unit connects a kind of scheme of design for scheme as an alternative of same first operation.
Embodiment
Fig. 1 shows a Band by Hot-rolling unit, at first in one second operation (representing with II.) steel band 1 is processed in one first operation (representing with I.) and subsequently in this Band by Hot-rolling unit.
In first operation, that is to say in rolling and process of cooling, at first in the steel rolling unit of multimachine frame, slab is rolled.Only show last three finishing stands 7 in this steel rolling unit, described finishing stand 7 has rolled out the steel band with interior thickness.Can measure the temperature distribution situation planeness in other words in the steel band subsequently.Then steel band 1 arrives in the cooling device for steel strip 8 along throughput direction F, and this cooling device for steel strip 8 is divided into a lamellated cooling device for steel strip 9 and a lamellated cooling device for steel strip 10 with reinforcement of so-called edge dam (Edge-Masking) here.Transfer rate is such as being 6m/s.Then obtain refrigerative steel band 1 and enter and strengthen in the refrigerating unit 11, according to a kind of preferred design of the present invention integrated straightener and clamping and conveying device (Fig. 4 shows the details of this respect) in this reinforcement refrigerating unit 11.Before described reinforcement refrigerating unit 11 and afterwards gripping unit can be set.
Be right after and strengthening temperature distribution situation and the planeness that refrigerating unit 11 back can be measured steel band once again.Preferably use the low-temp radiating thermometer for these lower temperature.Also can imagination between two squeezing rollers or pinch roll, carry out temperature survey in described reinforcement refrigerating unit inside for the temperature refrigerant regulates.
Steel band 1 is batched by reeling machine 12 or 13 in the station 3 of reeling then.
Then winding 2 enters in second operation, that is to say to enter in the drawing process.
Here at first uncoiling and then be fed to straightener 14 (this straightener 14 can be arranged in the front and/or the back of the process furnace that follows hard on) in uncoiling station 4 of winding 2.The district had carried out temperature equilibrium in 15 in the length of steel band and width range after, steel band 1 entered in the process furnace 16.May and advantageously, similar straightener is integrated into (Fig. 5 shows the details of this respect) in the process furnace 16 with cooling.Here working continuously or reversing and steel band 1 is heated in the operation.Preferred oxygen Fuel Furnace or the induction furnace of using, wherein heat-up time is between 10 and 600 seconds.
Next be bead cutter 17 and shears 18.Subsequently steel band 1 enter in the lamellated cooling device for steel strip or as an alternative scheme enter in the air cooling apparatus 19.And then can arrange a straightener 20.In Fig. 1, also further show steel plate separating unit 21 reeling machine 22 of station in 5 of reeling in other words then.
Here also can replace straightener 14 or 20 and arrange a skin-pass frame.
On the position at uncoiling station 4, also can send into from the winding in other the Band by Hot-rolling unit.
Relative therewith, described as can be seen two operation I. directly are connected (shown equipment is not intactly equipped) with II. in Fig. 2.Similarly, show last frame, cooling device for steel strip 8 and reeling machine 12 and 13 of a wide strip hot rolling unit (finishing train 7) of first operation here.Last reeling machine 23 is provided for the more high-intensity steel band of reeling.The special-purpose reeling machine that advantageously is used for the high-intensity steel of single coiling at this this reeling machine 23.This reeling machine 23 is so-called transmission reeling machine in this case.Winding does not need bundling there.Can when rotating, steel band be remained under the tension force by rotating pressure roller towards the uncoiling position.Thereby just after reeling, in tempering line (second operation), proceed to process.With in by the solution of Fig. 1, proceed to carry similarly.
Particularly advantageous here is to save energy and apace winding is continued to flow to second operation from first operation on the steel band with higher coiling temperature equally.That is to say regulation, just had the envrionment temperature of being higher than T before steel band 1 heats in process furnace 16
0Temperature.
In addition, steel band is reversed between two reeling machines 23 and 22, so that the desired temperature profile that can realize steel band treatment effect in other words.
Preferably short and/or member spacing when having sufficient size at steel band, also directly steel band 1 is flowed to second operation from first operation, and batch steel band 1 not and/or steel band 1 is made on the reeling machine 23 from reeling machine 22.Therefore do not use reeling machine 23 here, but after the steel band afterbody comes out from milling train with very low or at first very high and very low subsequently speed, directly implement drawing process.
Scheme can be used this processing mode that is used for steel band under the situation that does not rely on thickness and speed as an alternative.So, at first do not use reeling machine 23 and process furnace to stop using.Steel band is winding on the reeling machine 22.The ground of drawing process reversing is subsequently implemented between reeling machine 22 and 23.
Corresponding to Fig. 2, figure 3 illustrates the preferred temperature profile that is used for steel band 1 along strip mill.Preferably water cooling or the air cooling of carrying out at the end of tempering line of cooling.
But also can cool off with high-pressure section (Hochdruckbalken).At the same time steel strip surface is cleaned de-scaling in other words.
The turnout of rolling equipment is usually than the turnout height in the drawing process, because the roll speed of steel band is greater than tempering speed.Therefore also can carry out so-called mixed rolling operation, be used for utilizing best milling train.This means, the steel band of some amount is wound up on reeling machine 12 and 13, then continue more high-intensity steel band is processed on the tempering line.
Therefore, mainly be divided into two operations, exemplarily described operation described below with other optional step by the manufacturing of steel band of the present invention:
First operation:
-in the wide strip hot rolling unit of multimachine frame, slab (heavy slab or thin slab) is heated and be rolled subsequently;
-on the discharging roller-way, steel band is strengthened cooling;
-from straightener, pass;
-with steel coil strip coiled winding.
In order to improve the planeness of high-intensity steel band, advantageously, before traditional finishing train, carry out the heating of steel band seamed edge, use the edge dam that is located in the first cooling section unit and use straightener.
When the coiling temperature was higher, it was favourable that winding is flowed to ensuing second operation apace, so that save heat energy when tempering.Under heat screen, carry described winding then, so that reduce temperature loss and guarantee uniform material behavior.
Second operation:
-when being arranged, unflatness in straightener, steel band is aligned arbitrarily;
-optional cooling or heating by district's band carried out any balance to temperature of steel strips before real temper, so that make temperature of steel strips become even in steel band length and width range;
-make the steel band tempering, that is to say with induction heating or aspect the energy advantageously in the continuous furnace in gas heating (such as oxygen fuel process furnace) with so-called DFI technology carry out the successive reheat;
-cut edge to steel band;
-steel band is cooled off;
-once again steel band is aligned;
-once again with steel coil strip coiled winding.
Scheme as an alternative can be before the process furnace, after process furnace and/or directly before the steel plate separating unit steel band is cut into steel plate.This cutting of steel plate is for the steel band particularly advantageous that is difficult to batch.It is favourable cutting during for tempering temperature in temperature, because steel band has lower intensity in this case.
For thicker steel band and/or the high-intensity steel that again can't cut, torch-cutting machine, laser cutting machine or heat-cutting machine are provided for cutting.
In the oxygen fuel process furnace of being mentioned, implement so-called DFI-oxygen fuel process (directly flame loads) and carry out tempering, described oxygen fuel process furnace is special process furnace, replaces air and will (almost) pure oxygen mix mutually with the fuel of gasiform or liquid state and consequent flame is directly aimed at steel band in this process furnace.This has not only optimized the fuel process, and has reduced nitrogen oxides emission.The delamination performance is the growth very little in this case (moving under the situation of lack of air) of favourable iron scale in other words equally.The very high velocity of flow of gas even steel strip surface played cleaning action.About the steel strip surface quality, this type of heating particularly advantageous.Utilize this method under the situation that obtains good efficient, to obtain and very high hot strength similar in induction heating.
Can replace cooling section and on-line straightening machine that the priority in first or second operation is arranged, also straightener and cooling device for steel strip are placed in the unit in combination.Straightening roll then is used as the water squeezing roller simultaneously and therefore is used for producing cooling effect as far as possible uniformly in the width range of steel band, because possible steel band transverse bend and unflatness are directly just eliminated when producing.Under the situation that depends on temperature of steel strips and quality of materials, individually adjust straightening roll, thereby avoid the overplumping of steel strip surface by means of the straightener model.Even when not forming frame tension force or reeling machine tension force, the clamping and conveying device after reaching before the cooling section unit also is used for producing as far as possible for a long time steel band tension force.The part of cooling device for steel strip can be configured to the form of steel band district band refrigerating unit, and being used for to influence temperature distribution energetically.Described cooling aligning unit is shown in Fig. 1 and 2.Details about this respect can be as seen from Figure 4.In this accompanying drawing, be used to the possible combination arbitrarily of aligning, cooling off and extracting as can be seen.For the reliable crossing process of steel band head, especially when running into thin steel band, described cooling is aligned unit structure for can promote and rotating structure, this (referring to double-headed arrow) also shown in Figure 4.Described straightening roll can individually be regulated.
Before the common device that constitutes by straightener and refrigerating unit that can in Fig. 4, find out and/or a temperature scanning instrument that is used for steel band can be set afterwards.A steel band head shape detector (in order to survey Skis and ripple) can be positioned at before the shown equipment.
In Fig. 4, can at length find out clamping and conveying device 24, pure cooling unit 25, straightening roll 26 and the squeezing roller/clamping and conveying device 27 that makes up.Strengthen the nozzle of refrigerating unit 28 in addition as can be seen.
Can alternately arrange cooling, aligning and pinch roll unit at this.Under the situation of material that depends on steel band and temperature, individually regulate the aligning amount.Described aligning cooling unit can promote and turn round.
As can be finding out among Fig. 5, the aligning of second operation and heat-processed 14,16 also can with shown equipment combined running.Similarly, the aligning amount can be complementary with the temperature of steel strips and the strip material that exist.At this, the skin effect of described induction heating device (higher surface temperature) (perhaps directly flame loading in DFI oxygen fuel process) has a positive effect.Simultaneously, described straightening roll keeps steel band to put in place and avoid unflatness, thereby can carry out as far as possible effectively (induced) heating in the very long sliced section (Filetteil) of steel band.Clamping and conveying device 29 after reaching before the described heating-straightening unit remains on steel band under the tension stress 30.For penetrating the steel band head reliably, ruhmkorff coil 32 and straightening roll and guide roller 31 are configured to the structure that can vertically adjust.
Unit (Fig. 4) use of heating-straightening unit (Fig. 5) in other words of described cooling aligning is not limited to steel band equipment, but also can be arranged in the slab equipment.
Before the common device that constitutes by straightener and heating unit that can in Fig. 5, find out and/or a temperature scanning instrument that is used for steel band can be set afterwards.
In order be in second operation to influence the temperature distribution in the width of steel band scope when the induction heating, use the transverse magnetic field inductor block in addition, described transverse magnetic field inductor block can transverse to the steel band traffic direction in other words throughput direction F move.This-if necessary-such as heating greatly or the heating of littler degree to steel band edge.
Can be selected in steel band is heated to tempering temperature before by too hot or too cold steel band section being cooled off targetedly (district's band cooling) or being heated this mode and can carry out balance to the length and the temperature of steel strips in the width range of steel band.If should handle the winding that not exclusively is cooled to envrionment temperature, then especially this way should be set.Can shorten winding thus and pass passing the time of winding bearing (Coillager).Winding tracking system (model) and when the winding uncoiling measured temperature distribution be used for controlling ideally the heating or the cooling unit.
For straightening roll, use the roll material of the high abrasion of built-up welding, be used to guarantee very long life-span and good steel band quality.
Production line temperature inside scanner and planeness metering facility are monitored the quality of steel band and indirectly with acting on the signal of regulating and adjusting element, described adjusting and adjust element and pass through speed, heating power, straightening roll adjustment amount and cooling such as being used for by what process model was controlled.
Fig. 6 shows the situation of first operation in a kind of embodiment of doing slightly to change.Similar with Fig. 1, Fig. 6 shows aft section, the lamellated steel band cooling unit 9,10 of finishing train 7 and strengthens refrigerating unit 11 and the station 3 of reeling.In this embodiment, described reinforcement refrigerating unit 11 is arranged on the different positions with a steel band aligning unit 36.1,36.2.Clamping and conveying device 34 and 35 is positioned at the front and back of described reinforcement refrigerating unit 11.Can be almost whole steel band length thus in the inside of described reinforcement refrigerating unit 11 and keep a kind of steel band tension force, and not have this steel band is clamped in frame or the winding apparatus.The steel band wave wrinkle that may occur can be pulled out and obtain like this cooling performance as far as possible uniformly thus.
Strengthen in the refrigerating unit 11 in order to guarantee that steel band centering ground enters in the clamping and conveying device 34,35 and/or enters, especially advantageously, before described clamping and conveying device and/or reinforcement refrigerating unit, arranged steel band combination of side guides 33.1.Through described clamping and conveying device 33.1 and after strengthening refrigerating unit 11, described combination of side guides 33.1 is opened once more at the steel band head, so that can not stop the water in the lamellated cooling device for steel strip 10 to be discharged.Liner 33.2 is born oriented tasks for remaining steel band then.Similarly, for the steel band afterbody, after finishing train has been left in this end, adjust described liner 33.1 once more momently, be used to react on the skew of steel band afterbody.For cooling section length is reduced to bottom line, described combination of side guides 33.1 so preferred arrangements are in the inside of layered steel band cooling unit 10.
Corresponding coiling stands that the straightening roll 36.1,36.2 of 3 fronts sinks in the steel band plane after forming steel band tension force and the curling round the roll by sink roller, deflector roll or pinch roll is used to produce the steel band leveling effect.If in the internal layout of described reinforcement cooling section 11 deflector roll 26 (referring to Fig. 4), so similarly processing mode just obtains practical application.
Reference numerals list:
1 steel band (having final thickness in the mm finishing mill unit back)
2 windings
3 reel stands
4 uncoiling stations
5 reel stands
6 steel bands (inside in mm finishing mill unit has interior thickness)
7 mm finishing mill unit
8 cooling device for steel strip
The 9 lamellated cooling device for steel strip of strengthening
10 lamellated cooling device for steel strip
11 strengthen refrigerating unit
12 reeling machines
13 reeling machines
14 straighteners
15 districts band
16 process furnace
17 bead cutters
18 shearss
19 air cooling apparatuses or lamellated cooling device for steel strip
20 straighteners
21 steel plate separating units
22 reeling machines
23 reeling machines
24 clamping and conveying devices
25 pure cooling units
26 straightening rolls
27 squeezing rollers/clamping and conveying device
28 strengthen the nozzle of refrigerating unit
29 clamping and conveying devices
30 tension stresss
31 guide rollers
32 ruhmkorff coils
33.1 before first clamping and conveying device/combination of side guides before strengthening refrigerating unit
33.2 the combination of side guides before the coiling clamping and conveying device
34 clamping and conveying devices before strengthening refrigerating unit
35 clamping and conveying devices after strengthening refrigerating unit
36.1 at the straightening roll of the first roll before the station
36.2 at second straightening roll of reeling before standing
I. first operation
II. second operation
The F throughput direction
T
0Envrionment temperature
Claims (38)
1. be used for the steel band (1) that is formed from steel is carried out hot rolling and heat-treating methods, this method has following steps:
A) heat remaining rolling slab;
B) this slab is heated to desired thickness of strips;
C) steel band (1) is cooled off, wherein steel band (1) has the envrionment temperature of being higher than (T after cooling
0) temperature;
D) steel band (1) is wound into winding (2);
E) make steel band go up uncoiling from described winding (2);
F) steel band (1) is heated;
G) steel band (1) is cooled off; And
H) transport steel band (1),
Wherein, described steel band (1) is at f set by step) heating before have the envrionment temperature of being higher than (T
0) temperature.
2. press the described method of claim 1,
It is characterized in that,
Described winding (2) is on the station (3) of reeling when the step d) of implementing by claim 1, and described winding (2) is in one spatially on the uncoiling station (4) away from described coiling station (3) when the step e) of implementing by claim 1, wherein said winding (2) is at step d) and e) between with station (3) the adiabatic situation of reeling under flow to uncoiling station (4).
3. press claim 1 or 2 described methods,
It is characterized in that,
Follow closely immediately after by the step e) of claim 1 and to carry out by the step d) of claim 1.
4. press each described method in the claim 1 to 3,
It is characterized in that,
Described steel band (1) is standing the aligning process after by cooling period of the step c) of claim 1 and/or step g) or cooling.
5. press each described method in the claim 1 to 4,
It is characterized in that,
Described steel band (1) is standing the aligning process according to the uncoiling of being undertaken by the step e) of claim 1 and according between the heating of being undertaken by the step f) of claim 1.
6. press each described method in the claim 1 to 5,
It is characterized in that,
Described steel band (1) is according to the heating undertaken by the step f) of claim 1 and the step h of basis by claim 1) transport between stand the aligning process.
7. press each described method in the claim 4 to 6,
It is characterized in that,
By making steel band (1) turn to the described aligning process of carrying out around sinking roller, deflector roll, pinch roll or other roller.
8. press each described method in the claim 5 to 7,
It is characterized in that,
Described aligning process is implemented with the skin-pass frame.
9. press each described method in the claim 1 to 8,
It is characterized in that,
Described steel band (1) carries out standing between heating period the aligning process in basis by the step f) of claim 1.
10. press each described method in the claim 1 to 9,
It is characterized in that,
Comprise the stratiform cooling and strengthen cooling according to the cooling of described steel band (1) being carried out by the step c) of claim 1.
11. by each described method in the claim 1 to 10,
It is characterized in that,
Comprise the stratiform cooling according to the cooling of described steel band (1) being carried out by the step g) of claim 1.
12. by each described method in the claim 1 to 11,
It is characterized in that,
According to step c) and/or step g) the cooling that described steel band (1) carries out is implemented in the width range of steel band by band ground, district by claim 1.
13. by each described method in the claim 1 to 10,
It is characterized in that,
According to step g) the cooling that described steel band (1) carries out is comprised air cooling by claim 1.
14. by each described method in the claim 1 to 13,
It is characterized in that,
According to step g) the cooling that described steel band (1) carries out is implemented with high-pressure section, thereby simultaneously steel band is cleaned and/or de-scaling by claim 1.
15. by each described method in the claim 1 to 14,
It is characterized in that,
According to step f) the heating that described steel band (1) carries out is comprised induction heating by claim 1.
16. by the described method of claim 15,
It is characterized in that,
The induction heating of described steel band (1) carries out under inert gas environment.
17. by each described method in the claim 1 to 14,
It is characterized in that,
According to step f) the heating that described steel band (1) carries out is implemented by direct mode to steel band loading flame by claim 1.
18. by the described method of claim 17,
It is characterized in that,
The direct flame of described steel band (1) loads by the gas-jet with oxygen of at least 75% and is undertaken, and has mixed gasiform or liquid fuel in described gas-jet.
19. by the described method of claim 18,
It is characterized in that,
Directly flame loads and is undertaken by the gas-jet with pure oxygen.
20. by each described method in the claim 1 to 19,
It is characterized in that,
According to step h by claim 1) process that described steel band (1) is transported comprises the coiling of steel band (1).
21. by each described method in the claim 1 to 19,
It is characterized in that,
According to step h by claim 1) process that described steel band (1) is transported comprises the separation of part of the tabular cutting of this steel band (1).
22. by each described method in the claim 1 to 21,
It is characterized in that,
Described steel band (1) had at least 750 ℃ temperature before cooling off by the step c) of claim 1.
23. by each described method in the claim 1 to 22,
It is characterized in that,
Described steel band (1) has at least 25 ℃ and the highest 400 ℃ of preferred temperature between 100 ℃ and 300 ℃ after basis is cooled off by the step c) of claim 1 and before basis is reeled by the step d) of claim 1.
24. by each described method in the claim 1 to 23,
It is characterized in that,
Described steel band (1) has at least 400 ℃ of preferred temperature between 400 ℃ and 700 ℃ after heating according to the step f) by claim 1.
25. by each described method in the claim 1 to 24,
It is characterized in that,
So described steel band (1) is heated according to step f), make this steel band (1) in its width range, have different temperature by claim 1.
26. by each described method in the claim 1 to 25,
It is characterized in that,
Described steel band (1) is according to after cooling off by the step g) of claim 1 and according to the step h by claim 1) have the highest 200 ℃ of preferred temperature between 25 ℃ and 200 ℃ before transporting.
27. by each described method in the claim 1 to 26,
It is characterized in that,
By the step e) of claim 1 to g) in the reversing operation, implement, use the coiling station (5) that is in according to after the cooling of being undertaken by the step g) of claim 1 for this reason.
28. by each described method in the claim 1 to 27,
It is characterized in that,
On at least two positions of steel band treatment facility,, the quality of steel band (1) measures the planeness of this steel band (1) and/or the temperature of this steel band (1) for being monitored.
29. by each described method in the claim 1 to 28,
It is characterized in that,
The speed of passing of passing the steel band treatment facility of steel band, especially have the steel band heating of pass, the adjustment degree of straightening roll and/or especially relevant steel band cooling and control adjusting in other words by process model with district's band with the district.
30. by each described method in the claim 1 to 29,
It is characterized in that,
Described steel band (1) can remain on by means of clamping and conveying device under the specified steel band tension force by section through the steel band treatment facility time at least.
31. be used for the steel band (1) that is formed from steel is carried out hot rolling and heat-treating methods, have following steps:
A) heat remaining rolling slab;
B) slab rolling is arrived desired thickness of strips;
C) steel band (1) is cooled off, wherein steel band (1) has the envrionment temperature of being higher than (T after cooling
0) temperature;
D) steel band (1) is wound up on one first reeling machine (22);
E) steel band (1) is reversed between described first reeling machine (22) and one second reeling machine (23), wherein steel band stands heating between described reeling machine (22,23),
Wherein steel band (1) is at e set by step) heating before have the envrionment temperature of being higher than (T
0) temperature.
32. by each described method in the claim 1 to 31,
It is characterized in that,
Before the cooling of steel band (1) and form steel band tension force by means of clamping and conveying device (34,35) afterwards.
33. by each described method in the claim 1 to 32,
It is characterized in that,
Guide this steel band by means of combination of side guides (33.1,33.2) transverse to the longitudinal center line of steel band (1).
34. by the described method of claim 33,
It is characterized in that,
Described combination of side guides (33.1,33.2) is arranged in carries out in the cooled zones steel band (1).
35. by the described method of claim 34,
It is characterized in that,
Described combination of side guides (33.1,33.2) is arranged in carries out in the stratiform cooled zones steel band (1).
36. by each described method in claim 32 and the claim 33 to 35,
It is characterized in that,
The combination of side guides of described steel band (1) (33.1,33.2) is arranged in clamping and conveying device (34,35) and opens and close on the steel band afterbody before and after steel band head process.
37. by each described method in the claim 1 to 36,
It is characterized in that,
Measure temperature of steel strips by means of the low-temp radiating thermometer.
38. by each described method in the claim 1 to 37,
It is characterized in that,
Before refrigerating unit and/or the heating unit, within and/or afterwards temperature of steel strips is measured.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007029280.7 | 2007-06-22 | ||
| DE102007029280 | 2007-06-22 | ||
| DE102008010062A DE102008010062A1 (en) | 2007-06-22 | 2008-02-20 | Process for hot rolling and heat treatment of a strip of steel |
| DE102008010062.5 | 2008-02-20 | ||
| PCT/EP2008/004435 WO2009000387A1 (en) | 2007-06-22 | 2008-06-04 | Process for hot rolling and for heat treatment of a steel strip |
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| Publication Number | Publication Date |
|---|---|
| CN101755058A true CN101755058A (en) | 2010-06-23 |
| CN101755058B CN101755058B (en) | 2011-11-09 |
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| CN2008800214465A Active CN101755058B (en) | 2007-06-22 | 2008-06-04 | Process for hot rolling and for heat treatment of a steel strip |
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| US (1) | US20100175452A1 (en) |
| EP (1) | EP2162557B1 (en) |
| JP (1) | JP5485147B2 (en) |
| KR (1) | KR101153732B1 (en) |
| CN (1) | CN101755058B (en) |
| AR (1) | AR067091A1 (en) |
| AT (1) | ATE504665T1 (en) |
| AU (1) | AU2008267505B2 (en) |
| BR (1) | BRPI0812324A2 (en) |
| CA (1) | CA2686377C (en) |
| DE (2) | DE102008010062A1 (en) |
| DK (1) | DK2162557T3 (en) |
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- 2008-02-20 DE DE102008010062A patent/DE102008010062A1/en not_active Withdrawn
- 2008-06-04 CN CN2008800214465A patent/CN101755058B/en active Active
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- 2008-06-04 RU RU2010101900/02A patent/RU2429922C1/en active
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| CN103459619A (en) * | 2011-03-22 | 2013-12-18 | 日立金属株式会社 | Method for winding hot-rolled maraging steel strip |
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| US11231229B2 (en) | 2015-01-09 | 2022-01-25 | Illinois Tool Works Inc. | Inline resistive heating system and method for thermal treatment of continuous conductive products |
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| CN108136468B (en) * | 2015-10-07 | 2020-08-04 | 百德福钢带有限公司 | Method and device for producing a metal strip having substantially parallel strip edges |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200914157A (en) | 2009-04-01 |
| CA2686377A1 (en) | 2008-12-31 |
| PL2162557T3 (en) | 2011-09-30 |
| JP2010530807A (en) | 2010-09-16 |
| CA2686377C (en) | 2011-09-27 |
| EP2162557A1 (en) | 2010-03-17 |
| ATE504665T1 (en) | 2011-04-15 |
| WO2009000387A1 (en) | 2008-12-31 |
| RU2010101900A (en) | 2011-07-27 |
| SI2162557T1 (en) | 2011-08-31 |
| EG25307A (en) | 2011-12-07 |
| DK2162557T3 (en) | 2011-07-11 |
| ES2362052T3 (en) | 2011-06-27 |
| EP2162557B1 (en) | 2011-04-06 |
| JP5485147B2 (en) | 2014-05-07 |
| AU2008267505B2 (en) | 2010-11-25 |
| TWI412410B (en) | 2013-10-21 |
| BRPI0812324A2 (en) | 2014-11-25 |
| KR20100007940A (en) | 2010-01-22 |
| MY148425A (en) | 2013-04-30 |
| CN101755058B (en) | 2011-11-09 |
| AU2008267505A1 (en) | 2008-12-31 |
| ZA200907733B (en) | 2010-06-30 |
| MX2009013530A (en) | 2010-01-27 |
| DE102008010062A1 (en) | 2008-12-24 |
| UA98653C2 (en) | 2012-06-11 |
| DE502008003118D1 (en) | 2011-05-19 |
| US20100175452A1 (en) | 2010-07-15 |
| RU2429922C1 (en) | 2011-09-27 |
| AR067091A1 (en) | 2009-09-30 |
| KR101153732B1 (en) | 2012-06-14 |
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