CN102549173A - Method and device for producing a microalloyed steel, in particular a pipe steel - Google Patents
Method and device for producing a microalloyed steel, in particular a pipe steel Download PDFInfo
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- CN102549173A CN102549173A CN2010800456122A CN201080045612A CN102549173A CN 102549173 A CN102549173 A CN 102549173A CN 2010800456122 A CN2010800456122 A CN 2010800456122A CN 201080045612 A CN201080045612 A CN 201080045612A CN 102549173 A CN102549173 A CN 102549173A
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 229910000742 Microalloyed steel Inorganic materials 0.000 title claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 62
- 238000005266 casting Methods 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 10
- 238000003723 Smelting Methods 0.000 claims description 72
- 238000005096 rolling process Methods 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 20
- 239000000446 fuel Substances 0.000 claims description 8
- 238000009825 accumulation Methods 0.000 claims description 6
- 239000012141 concentrate Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
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- 239000007788 liquid Substances 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 238000005496 tempering Methods 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 10
- 230000006698 induction Effects 0.000 description 7
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
-
- 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
- C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
-
- 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
- C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
- C21D8/0215—Rapid solidification; Thin strip casting
-
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
-
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
Abstract
The invention relates to a method for producing a microalloyed steel, in particular a pipe steel, wherein a cast slab (1) runs through an apparatus (2), comprising in the conveying direction (F) of the slab (1) in the following order: a casting machine (3), a first furnace (4), at least one roughing stand (5), a second furnace (6), at least one finishing stand (7) and one cooling path (8). The method comprises: a) defining a desired temperature profile for the slab (1) for the path thereof through the apparatus (2); b) positioning at least one temperature influencing element (9, 10) for tempering the slab (1) according to the defined temperature profile in the process line (L) of the apparatus (2), wherein the temperature influencing element (9, 10) is inserted between the first furnace (4) and the at least one roughing stand (5) and/or between the second furnace (6) and the at least one finishing stand (7); c) producing the slab (1) in the apparatus (2) configured in said manner, wherein the at least one temperature influencing element (9, 10) is operated in such a way that the defined temperature profile is maintained to a great extent. Furthermore, the invention relates to an apparatus for producing a microalloyed steel.
Description
Technical field
The present invention relates to a kind of be used to make micro-alloyed steel, the method for tubulation steel
especially; Wherein, The slab of being cast (Bramme) is through an equipment, and it has casting machine, first smelting furnace, at least one rougher (Vorwalzger ü st), second smelting furnace, at least one planishing stand and cooling section (Kuehlstrecke) with this in proper order on the throughput direction of slab.In addition, the present invention relates to a kind of equipment that is used to make micro-alloyed steel.
Background technology
Different possibilities has been described in manufacturing for band in the prior art, and it is according to such method work.For example reference paper US 2005/0115649A1, file WO 2009/012963A1, file WO 2007/073841A1, file WO 2009/027045A1, file EP 0 611 610B1 and file EP 1 860 204A1.
The method of being set up is the rolling of hot machine.Recently, micro-alloyed steel is more and more important.At this, tubulation steel (according to API specification 5L) is in the most important subgroup (Untergruppe) of micro-alloyed steel.Demand to these steel increases all the time.
The largest portion of tubulation steel is gone up at plate mill (Grobblechwalzwerk) and is produced.Yet, especially for not excessive final thickness and final width, the tubulation steel equally also can be in hot broadband unit (Warmbreitbandstra β e), so-called GSP equipment and other device of being used for hot rolling system go up and make.
When making micro-alloyed steel usually and especially making the tubulation steel, should be specifically noted that the temperature variation (Temperaturverlauf) of function (or function of the position of conduct in processing units) as the time.This variation and decrease distribute (Abnahmeverteilung) combined with the development of conclusive degree affect microstructure and determine the machinery or the technical characteristic of steel thus.For this reason, use for example high-power refrigerating unit, can adjust desired temperature variation by means of it in finishing train (Fertigstra β e) back.
Disadvantageously be; Known in advance processing unit (plant) and method be not best-fit at the processing micro-alloyed steel, especially neatly corresponding starting condition and requirement are reacted during the tubulation steel, so that to process these steel types about the time or about the temperature profile (Temperaturprofil) that landline
can freely be selected to a great extent.Can not control and influence the tissue growth in the steel best thus.Therefore, the mentioned flexible manufacturing of steel aspect its chemical ingredients and size (Abmessung) is restricted.
Summary of the invention
Therefore the object of the invention is to provide a kind of method and affiliated device, utilizes this method or use device possibly overcome mentioned shortcoming.Correspondingly, should be possible about the time or about the improved control according to the temperature variation of desired profile of delivery conduit, so that can control and regulate tissue growth better thus.In addition, micro-alloyed steel, the possibility that should become of processing more flexibly of tubulation steel especially thus.
This purpose is the order of following steps according to method feature through solution of the present invention:
A) be defined in it through desired temperature profile on the process of equipment for slab;
B) at least one is used for the production line (Prozesslinie) of the equipment that navigates to according to the element that influences temperature of defined temperature profile temperature adjustment (Temperierung) slab; Wherein, the element that influences temperature is introduced between first smelting furnace and this at least one rougher and/or between second smelting furnace and this at least one planishing stand;
C) producing slab or band in the device designed like this, wherein, this at least one element that influences temperature is made and keeps defined temperature profile at least to a great extent by operation like this.
At this, use other smelting furnace according to plan of the present invention as the element that influences temperature.It can be sense melt furnace (Induktionsofen) or the smelting furnace that applies (Flammenbeaufschlagung) (DFI hydroxyl fuel (Oxyfuel) smelting furnace) heating slab through direct flame.In the latter's situation, preferably be arranged to, the gas-jet that the direct flame of slab applies through having 75% oxygen at least realizes that the fuel of gasiform or liquid state is by in the entrained gas jet.Also can use balance smelting furnace (Ausgleichsofen), roller hearth furnace (Rollenherdofen) or walking beam furnace (Hubbalkenofen) or pusher type furnace (Sto β ofen) as other smelting furnace.
Also can use other cooling section as the element that influences temperature.It for example can relate to concentrates cooling section or lamellated band cooling section.
Finally also can use
element (roller-way capsule (Rollgangskapselung)) that suppresses temperature as the element that influences temperature.
At this, preferably under the situation that with the organize models is the basis, confirm temperature profile.At this preferably, organize models confirms following parameter and/or monitors them: about the temperature profile of time or road number (Stichanzahl), about decrease distribution, maintenance or time of oscillation (Pendelzeit), roll speed and travelling speed and/or the heating and the cooling intensity of time or road number.
An improvement project is arranged to; Through using the element that influences temperature to be implemented to the like this low entering temperature in this at least one planishing stand with the form of cooling end; Make and do not take place to a great extent at this place's recrystallize and grain growing; Wherein, get into this at least one rougher and get into this of the form of cooling end and influence the temperature levels between the element of temperature
A), be lowered by means of the element that influences temperature, so that reduce the grain size when getting into finishing train, perhaps with the form of cooling end especially for the tubulation steel that has low microalloy element content and little slab thickness
B), be enhanced by means of the element that influences temperature, so that guarantee when roughing recrystallize completely, perhaps with the form of heating part especially for the tubulation steel that has high microalloy element content and big slab thickness
C) only be balanced and remain unchanged in addition.
In addition according to improvement project possible be, be implemented to the like this high input temp in this at least one planishing stand through using the element that influences temperature with the form of heating part, make this place's recrystallize finish fully and
A) because high temperature and decrease, during the first finish rolling road (Fertigstich), realized and the accumulation of in last finish rolling road, following distortion then perhaps
B), after the accumulation of distortion has before taken place, just during last finish rolling road, realize owing to suitable temperature and decrease.
Be used to make micro-alloyed steel, the equipment of tubulation steel especially; It has casting machine, first smelting furnace, at least one rougher, second smelting furnace, at least one planishing stand and cooling section with this in proper order on the throughput direction of slab; Be characterised in that according to the present invention; Can selectively the element that influences temperature that is used for the temperature adjustment slab introduced production line between first smelting furnace and this at least one rougher and/or between second smelting furnace and this at least one planishing stand; Wherein, this element that influences temperature can be selected from one of following element: the element of other smelting furnace, other cooling section, inhibition temperature.
An improvement project is arranged to; Other smelting furnace, other cooling section and suppress temperature element these influence in the element of temperature at least one can be laterally with respect to the throughput direction of slab layout so movably, make that in the element can be introduced in the production line selectively.
At this; Other smelting furnace, other cooling section and suppress in these elements of element of temperature at least one and can be centered around the rotation that points on the throughput direction and arrange so swingably make that in the element can be introduced in the production line selectively.
Utilize the solution proposed, micro-alloyed steel, tubulation steel (X52 for example especially ... X120) improved manufacturing is possible, and this causes favourable property combination.Autotelic control through temperature variation reaches intensity and and the optimum value of toughness (Zaehigkeit) and in handiness maximum aspect the size of employed chemical ingredients and the finished product.Utilization can eliminate to a great extent according to suggestion of the present invention because the restriction that general so far process control exists.In the manufacturing of steel, obtain advancing of desired temperature-time curve with very favorable mode, this allows to produce the tubulation steel that has extra best best.
According to the mode that is proposed, temperature is not only before the roughing unit but also between roughing unit and finishing train, can be enhanced, keep constant or reduce.Promptly in the handiness that reaches top aspect the temperature control, this has not only opened up and has made the basic possibility of tubulation steel, and makes the different methods approach that is used to make these steel types as requested become possibility with adjustment material different characteristic in addition.
In addition, many other steel types (temperature variation is played an important role therein) can be obviously no problem ground and in situation about confirming, making more with improved characteristic, be this situation for example like this for heterogeneous steel and all types of micro-alloyed steel.
At last, can use the decrease distribution of change and can carry out especially high decrease by means of the temperature variation that changes.Its also cause for the littler attainable final thickness of whole steel types and can be in equipment design additional freeboard.
In addition, effectively the application of the use of heating part (induction heating portion or according to the smelting furnace of DFI hydroxyl fuel process) and/or adjustable concentrated cooling end (for example at the position of roughing band in air place swing (the Pendel)) overall throughput or its that have increased equipment simplified production process.
Therefore, mode that is proposed or device make before the roughing temperature that on purpose influences slab according to material analysis, scantling and material behavior become possibility.Likewise, the temperature that on purpose influences the roughing band according to material analysis, scantling and material behavior before the finish rolling is possible.
Preferably, use or the application of temperature controlled autotelic control through organize models realizes during each process step.At this, organize models's (as mentioning) confirms the curve of following parameter and monitors them:
-about the temperature profile of time or road number (Stichanzahl),
-distribute about the decrease of time or road number
-keep or time of oscillation
-be used to influence the roll speed and the travelling speed of temperature profile,
-heating and cooling intensity.
In addition, can be implemented in the autotelic control of softening process (Entfestigungsvorgang) dissimilar during each process step and the control that is associated therewith of material behavior.
This method can be used for the processing of different hot machines.
The installation of slab cooling end can realize before the predeformation in rougher at slab.Likewise, the installation of induction heating portion or DFI hydroxyl fuel heating part can realize before predeformation in rougher.
Different coolings and heating installation can be through moving or swing replacing each other.
To improve that have the greatest impact accessible decrease and total decrease distribute be possible through having autotelic temperature before roughing and finish rolling to the effect of the size of product and characteristic and equipment design.
Thus, the throughput of rolling equipment improves through autotelic (additional) cooling and/or heating.
Description of drawings
Embodiments of the invention shown in the drawings.Wherein:
Fig. 1 schematically in side view shows according to the casting rolling equipment of first form of implementation of the present invention, it has casting machine, first smelting furnace, roughing unit, second smelting furnace, finishing train and cooling section,
Fig. 2 has shown the plan alternative with respect to Fig. 1 according to the casting rolling equipment of second embodiment,
Fig. 3 has shown another plan alternative with respect to Fig. 1 according to the casting rolling equipment of the 3rd embodiment,
Fig. 4 has shown another plan alternative with respect to Fig. 1 according to the casting rolling equipment of the 4th embodiment,
Fig. 5 has shown another plan alternative with respect to Fig. 1 according to the casting rolling equipment of the 5th embodiment,
Fig. 6 has shown another plan alternative with respect to Fig. 1 according to the casting rolling equipment of the 6th embodiment,
Fig. 7 has schematically shown the casting rolling equipment according to another form of implementation in vertical view,
Fig. 8 has shown the element that influences temperature that schematically shows of casting rolling equipment, on throughput direction, observes according to the slab of first form of implementation of the present invention,
Fig. 9 has shown another plan alternative with respect to Fig. 8 according to the element that influences temperature of second form of implementation of the present invention,
Figure 10 has shown another plan alternative with respect to Fig. 8 according to the element that influences temperature of the 3rd form of implementation of the present invention, and
Figure 11 has shown another plan alternative with respect to Fig. 8 according to the element that influences temperature of the 4th form of implementation of the present invention.
Embodiment
In Fig. 1, in side-view, draw the equipment 2 that is used on a line casting and rolling tubulation firm (according to API specification 5L).It has casting machine 3 (vertical casting equipment or crooked casting equipment (Bogengie β anlage)), makes slab 1 through continuous casting in known manner therein.The typical dimensions of slab can be the width between the thickness and 900 to 3000mm between 50 to 150mm.On throughput direction F; Casting machine 3 follows first smelting furnace 4, is used for the roughing unit (wherein, unique rougher 5 (also being provided with a plurality of roughers sometimes) only being shown) of rolled slab, second smelting furnace 6, be used for the finishing train (unique planishing stand 7 (being provided with a plurality of planishing stands mostly) wherein only is shown) and the cooling section 8 of rolled slab or band.
Also have other element, it is inessential aspect the temperature control or only be accessory.Between the casting machine 3 and first smelting furnace 4, be furnished with shears 12, utilize it can slab 1 be cut into the slab length (alternatively also can use gas cutting equipment) of expectation.Between first smelting furnace 4 and rougher 5, be furnished with oxide debris cleanser (Zunderwaescher) 13.Other oxide debris cleanser 14 also is located immediately at before the planishing stand 7.Be provided with reeling machine (Haspel) 15 in cooling section 8 back (in known manner), it rolls the band of completion.
Firm for tubulation, aspect the temperature control in the distance of equipment 2, there is the requirement that improves at slab or band.
Before the processing band, at first confirm about the time or about the desired temperature profile of the delivery conduit on throughput direction F.For this reason, the auxiliary organize models that preferably uses a computer himself is known and its mode with specialty confirms how the temperature of slab 1 or band changes, and can process best product thus.Through for the special position regulation slab 1 of processing units 2 or the TR of band, below further obtain exemplary explanation for such temperature variation.
According to the temperature profile of defined preparation machine 2 like this, make that the profile of expectation can be gone so.This realization like this according to the present invention; Make realization that at least one is used for navigating to according to the element that influences temperature of the temperature profile temperature adjustment slab 1 that defines the production line of equipment 2; Wherein, the element that influences temperature is introduced between first smelting furnace 4 and this at least one rougher 5 and/or between second smelting furnace 6 and this at least one planishing stand 7.
In the embodiment according to Fig. 1, the element 9 that influences temperature is cooling sections, and it is introduced in the production line in second smelting furnace, 6 back effectively.According in order to reach the required cooling power of desired temperatures profile, can relate to and concentrate cooling end or lamellated cooling end.
In cooling and through after the oxide debris cleanser 14, at least one planishing stand 7, realize successive or inverse (reversierend) finish rolling, wherein, preferably be provided with the planishing stand of certain number, i.e. finish rolling echelon (Fertigwalzstaffel).Finish rolling is implemented on the finished product tape thickness and finished product band temperature of expectation, next cooling zone in cooling section 8.As last step, the roll coil of strip is played on the reeling machine 15.Replace rolling the band of finish rolling, alternatively it also can directly be transferred to correction portion (Adjustage).
For the finish rolling of tubulation steel in the scope of the processing of the hot machine of classics, be provided with from 850 to 950 ℃ TR in smelting furnace 6 and cooling end 9 back.Low entering temperature guarantees, recrystallize and grain growing does not take place to a great extent and almost all distortion of accumulation during isothermal rolling in finishing train almost, thus in transformation subsequently, produce very compact grained tissue.Other prerequisite be typically less than 820 ℃ enough low finishing temperature and in cooling section sufficiently high speed of cooling.
Yet except the cooling end in the top described zone between rougher 5 and planishing stand 7, the temperature that before getting into rougher 5, has influenced band can be necessary.Fig. 2 has shown and has been used to make the equipment 2 according to the tubulation steel of API for this reason, and therein, the part of the back of first smelting furnace 4 is replaced by band cooling end 10.More precisely, be introduced in the production line at this additional cooling section 10 as the element that influences temperature 10.
Through the cooling of slab, can further improve hot machine processing degree and be limited in the grain growing between roughing unit and the finishing train.Yet must guarantee recrystallize completely at this, because this mode is particularly suitable for having the tubulation steel of low microalloy element content and littler slab thickness.
Otherwise, for extra high alloying element content and big slab thickness, be heated to higher temperature even can be significant, so that being become, higher degree of deformation maybe and guarantee dynamic or static completely recrystallize.In addition, the temperature of raising can advantageously act on the dissolved state of microalloy element.In a form of implementation of the present invention shown in Fig. 3, it makes this become possibility with particularly advantageous mode.At this,, be introduced in the production line with the element that influences temperature of the form of induction heating portion in first smelting furnace 4 back and in rougher 5 fronts.
Fig. 4,5 and 6 has shown equipment scheme, therein, particularly with compare the band cooling end that is arranged in before the finish rolling according to Fig. 2 with 3 solution and replace by induction heating portion or smelting furnace.
Although pursue the processing (it has the cumulative of making and is out of shape maximized purpose) of the hot machine of such classics up to now, should use diverse ways for certain steel.Further softening in the zone of finishing train abandoned in replacement after the perfect recrystallization of and then roughing, pursue recrystallize again.This recrystallize needs high temperature, and its particularly advantageous ground can produce through induction heating portion or DFI hydroxyl fuel smelting furnace.At this; For extra high temperature and degree of deformation; Recrystallize can be in the ensuing accumulation that realizes and in last finish rolling road, follow distortion during the first finish rolling road; And or for so not high temperature and degree of deformation, after being accumulated in of distortion taken place in the first finish rolling road, dynamic recrystallize just occurred during last finish rolling road.In two kinds of situation, compare with the processing of the hot machine of classics, for example according to according to Fig. 1,2 and 3 solution, temperature improves and causes, and the degree of deformation of maximum possible improves, and reduces in order to activate the required degree of deformation of recrystallize, thus remollescent trend obviously increases.
Through for the possibility of temperature effect according to expansion of the present invention; Can in each battery limits, satisfy requirement to the contradiction so far of temperature variation; Become possibility thereby make in process trend (Prozessverlauf) best aspect the product performance in each in each district, i.e. advancing in slab or in band along the temperature variation of the optimal selection of throughput direction F.Thus, provide the material behavior of expectation or the coupling flexibly of scantling or material different analysis.
Simultaneously, influencing temperature control is efficient instrument so that load and the decrease distribution of influence in rougher and planishing stand, this can be used for reducing minimum accessible final thickness and or in design, employ littler equipment.
Temperature variation is to the description explanation of the multifarious effect of microstructure; The control of tissue growth is necessary at any time; And when process is monitored and/or control or when regulating by suitable organize models, the tubulation steel so especially causes the mechanical characteristics expected according to the mode that is proposed rolling.
On identical equipment, during rolling Standard Steel, before finishing train, use about 1000 to 1150 ℃ temperature usually, but in special situation, also higher or lower.Necessity for the adjustment different temperature increases along with the complicacy of alloy scheme.For heterogeneous steel and different this mode particularly advantageouies of micro-alloyed steel.Utilize the equipment scheme slab, thin slab, middle band, band and the sheet material in most applications that are proposed can be brought on the temperature levels of being pursued, thereby do not have any restriction aspect the desired material behavior.
Be arranged in order to mate corresponding process condition best; Band cooling end 9 (in Fig. 1,2 and 3) and induction heating portion 10 (in Fig. 3 and in Fig. 5) or 9 (in Fig. 4) implement on transverse to the direction of throughput direction F movably or swingably, and one perhaps another equipment 9,10 can be activated.
Similarly, according to Fig. 6, be alternative in Fig. 4, replace band cooling end 10 or induction heating portion 9, traditional balance smelting furnace 9,10 can be sailed in the production line.This is suitable for before roughing equipment and distinct device afterwards.
Casting machine 3 can with milling train unit 5 together or with its semistall be arranged in the production line.For this reason, with reference to figure 7, can in vertical view, observe corresponding example therein.At this, go up casting machine 3 ' parallel layouts for two, slab is by means of gas cutting machine 12 ' the be separated into length of expectation after it.By means of walking beam furnace 4 ' or pusher type furnace can be on respect to the horizontal Q of throughput direction F with the line L of slab 1 below two top line L are shifted onto on; The other equipment unit that is used for processing band is in following production line.The line L of bottom has casting machine 3 equally, is furnished with shears 12 at the back at it.
Through smelting furnace 4,4 ' slab 1 is heated to about 1100 to 1200 ℃ roughing temperature.After oxide debris cleanser 13, roughing perhaps alternatively is implemented on the interior thickness at a plurality of roughers 5 places at one with reversing continuously or.
The selection that is utilized in the roll speed at rougher 5 places also can influence smelting furnace and get into temperature.
Be furnished with second smelting furnace 6 as keeping smelting furnace (Halteofen) in rougher 5 back.Keep smelting furnace 6 that enough spaces are provided, so that can fully be contained in the thin slab of distortion in the rougher 5.The swing of the weak point of the thin slab of distortion also can take place in smelting furnace 6.
Replace keeping smelting furnace 6, also can be furnished with the roller-way of roller-way capsule or standard at this.And then smelting furnace 6 or roller-way capsule, there is the element that influences temperature 9 with the form of cooling section the location in line L, utilizes it before finish rolling in planishing stand 7, to take slab 1 to desired temperatures.Alternatively, band cooling end 9 also can be positioned at before the maintenance smelting furnace or before the roller-way capsule.
In Fig. 8 to 11, drawn the element 9,10 through influencing temperature edgewise moved or swing in and show the details of changing different equipment.Can make that three different equipment are shared a position in production line through suitable mobile devices in case of necessity in addition.
In Fig. 8, can observe out, how additional smelting furnace (left side in Fig. 8) or sense melt furnace (the right in Fig. 8) alternatively can upward be sailed in the line L through moving to horizontal direction Q.Deviation post (Ausweichposition) 16,16 ' two smelting furnaces of permission in the line L both sides move to the right or on the contrary from shown position simultaneously.
In Fig. 9, drawn similar situation for the element that influences temperature 9,10 that alternatively can introduce in the line L with the form of cooling end (left side in Fig. 9) and sense melt furnace (the right in Fig. 9).And such rooty is suitable for roller hearth furnace (left side) and slab cooling end (the right) according to Figure 10.
In Figure 11, can observe out, can be by around rotation 11 swing with the element that influences temperature 9 of the form of cooling beam (K ü hlbalken), engage or deviate from so that it is taken to.And sense melt furnace 10 can laterally be arranged on the direction Q movably, so as (when it should to be brought to) make its drive to deviation post 16 ' in.
List of numerals
1 slab (band)
2 equipment
3 casting machines
3 ' casting machine
4 first smelting furnaces
4 ' walking beam furnace or pusher type furnace
5 roughers
6 second smelting furnaces
7 planishing stands
8 cooling sections
9 influence the element of temperature
10 influence the element of temperature
11 axiss of oscillation
12 shearss
12 ' gas cutting equipment
13 oxide debris cleansers
14 oxide debris cleansers
15 reeling machines
16 deviation posts
16 ' deviation post
The F throughput direction
The horizontal travel direction of Q
The L production line
Claims (26)
1. one kind is used to make micro-alloyed steel, the method for tubulation steel especially; Wherein, The slab of being cast (1) is through equipment (2); Its throughput direction in said slab (1) (F) is gone up has casting machine (3), first smelting furnace (4), at least one rougher (5), second smelting furnace (6), at least one planishing stand (7) and cooling section (8) in proper order with this, and wherein, said method comprises:
A) be defined in desired temperature profile on its process for said slab (1) through said equipment (2);
B) at least one is used for the element that influences temperature (9 according to the defined said slab of said temperature profile temperature adjustment (1); 10) navigate in the production line (L) of said equipment (2); Wherein, The said element (9,10) that influences temperature is introduced between said first smelting furnace (4) and said at least one rougher (5) and/or between said second smelting furnace (6) and said at least one planishing stand (7);
C) in the said equipment (2) of design like this, produce said slab (1) or band, wherein, said at least one element (9,10) that influences temperature is made and keeps defined said temperature profile at least to a great extent by operation like this.
2. method according to claim 1 is characterized in that, uses other smelting furnace as the element that influences temperature (9,10).
3. method according to claim 2 is characterized in that, uses sense melt furnace as other smelting furnace.
4. method according to claim 2 is characterized in that, in said other smelting furnace, applies (DFI hydroxyl fuel smelting furnace) through direct flame and realizes heating said slab (1).
5. method according to claim 4 is characterized in that, realizes that the direct flame of said slab (1) applies at least through the gas-jet that has 75% oxygen, and gasiform or liquid fuel are sneaked in the said gas-jet.
6. method according to claim 2 is characterized in that, uses the balance smelting furnace as other smelting furnace.
7. method according to claim 2 is characterized in that, uses roller hearth furnace as other smelting furnace.
8. method according to claim 2 is characterized in that, uses walking beam furnace or pusher type furnace as other smelting furnace, and it can laterally transport said slab.
9. method according to claim 1 is characterized in that, uses other cooling section as the element that influences temperature (9,10).
10. method according to claim 9 is characterized in that, uses as other cooling section and concentrates cooling section.
11. method according to claim 9 is characterized in that, uses lamellated band cooling section as other cooling section.
12. method according to claim 1 is characterized in that, uses the element that suppresses temperature as the element that influences temperature (9,10).
13. according to each described method in the claim 1 to 12, it is characterized in that, under the situation that with the organize models is the basis, confirm said temperature profile.
14. method according to claim 13; It is characterized in that said organize models confirms and/or monitors following parameter: about the temperature profile of time or road number, about decrease distribution, maintenance or time of oscillation, roll speed and travelling speed and/or the heating and the cooling intensity of time or road number.
15. according to each described method in the claim 1 to 14; It is characterized in that; Through using the element that influences temperature (9) to be implemented to the like this low entering temperature in said at least one planishing stand (7) with the form of cooling end; Make and do not take place to a great extent, wherein, get into said at least one rougher (5) and get into the temperature levels between the element that influences temperature (9) of said form with cooling end at this place's recrystallize and grain growing
A), be lowered by means of the element that influences temperature (10), so that reduce the grain size when getting into said finishing train (7), perhaps with the form of cooling end especially for the tubulation steel that has low microalloy element content and little slab thickness
B), be enhanced by means of the element that influences temperature (10), so that guarantee when roughing recrystallize completely, perhaps with the form of heating part especially for the tubulation steel that has high microalloy element content and big slab thickness
C) only be balanced and remain unchanged in addition.
16. according to each described method in the claim 1 to 14; It is characterized in that; The element that influences temperature (10) through using with the form of heating part is implemented to the like this high input temp in said at least one planishing stand (7), make this place's recrystallize finish fully and
A) because high temperature and decrease, perhaps in the accumulation that realizes during the first finish rolling road and in last finish rolling road, follow distortion then
B), after the accumulation of distortion has before taken place, just during last finish rolling road, realize owing to suitable temperature and decrease.
17. one kind is used to make micro-alloyed steel, the equipment of tubulation steel (2) especially; Its throughput direction in slab (1) (F) is gone up has casting machine (3), first smelting furnace (4), at least one rougher (5), second smelting furnace (6), at least one planishing stand (7) and cooling section (8) in proper order with this; Said equipment (2) is particularly useful for carrying out according to each described method in the claim 1 to 16
It is characterized in that,
Between said first smelting furnace (4) and said at least one rougher (5) and/or can be between said second smelting furnace (6) and said at least one planishing stand (7) selectively with the element that influences temperature (9 that is used for the said slab of temperature adjustment (1); 10) introduce in the production line (L); Wherein, The said element (9,10) that influences temperature can be selected from one of following element: the element of other smelting furnace, other cooling section, inhibition temperature.
18. equipment according to claim 17 is characterized in that, said other smelting furnace is a sense melt furnace.
19. equipment according to claim 17 is characterized in that, the smelting furnace (DFI hydroxyl fuel smelting furnace) that said other smelting furnace applies for the direct flame that has said slab (1).
20. equipment according to claim 17 is characterized in that, said other smelting furnace is the balance smelting furnace.
21. equipment according to claim 17 is characterized in that, said other smelting furnace is a roller hearth furnace.
22. equipment according to claim 17 is characterized in that, said other smelting furnace is walking beam furnace or pusher type furnace, and it can laterally transport said slab.
23. equipment according to claim 17 is characterized in that, said other cooling section is to concentrate cooling section.
24. equipment according to claim 17 is characterized in that, said other cooling section is lamellated band cooling section.
25. according to each described equipment in the claim 17 to 24; It is characterized in that; These elements (9 of element of other smelting furnace, other cooling section and inhibition temperature; 10) at least one in can laterally arrange with respect to the throughput direction (F) of said slab movably like this, makes that in the said element (9,10) can be introduced in the said production line (L) selectively.
26. according to each described equipment in the claim 17 to 24; It is characterized in that; These elements (9 of element of other smelting furnace, other cooling section and inhibition temperature; 10) at least one in is centered around the rotation (11) that points on the throughput direction and arranges so swingably, makes one in the said element (9,10) can be introduced into selectively in the said production line (L).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009036378.5 | 2009-08-06 | ||
| DE102009036378A DE102009036378A1 (en) | 2009-08-06 | 2009-08-06 | Method and apparatus for producing a microalloyed steel, in particular a tubular steel |
| PCT/EP2010/004814 WO2011015365A1 (en) | 2009-08-06 | 2010-08-05 | Method and device for producing a microalloyed steel, in particular a pipe steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102549173A true CN102549173A (en) | 2012-07-04 |
| CN102549173B CN102549173B (en) | 2014-07-30 |
Family
ID=42752124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080045612.2A Active CN102549173B (en) | 2009-08-06 | 2010-08-05 | Method for producing pipe steel |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20120160377A1 (en) |
| EP (1) | EP2462248B1 (en) |
| JP (1) | JP6033681B2 (en) |
| KR (1) | KR20120047950A (en) |
| CN (1) | CN102549173B (en) |
| DE (1) | DE102009036378A1 (en) |
| RU (1) | RU2491356C1 (en) |
| WO (1) | WO2011015365A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104254406A (en) * | 2012-01-25 | 2014-12-31 | 西马克·西马格公司 | Method and plant for producing a metal strip |
| CN108603239A (en) * | 2015-10-21 | 2018-09-28 | 奥钢联克雷姆斯有限责任公司 | The method for producing the partially hardened proximate matter of roll forming |
| CN109943703A (en) * | 2017-12-21 | 2019-06-28 | 特纳瑞斯盘管有限公司 | For manufacturing the method and system of continuous pipe |
| CN114786830A (en) * | 2019-12-11 | 2022-07-22 | Sms集团有限公司 | Modular rolling train, in particular hot rolling train, preferably combined with upstream casting device |
| CN114829859A (en) * | 2019-12-11 | 2022-07-29 | Sms集团有限公司 | Device and method for flexibly influencing the process control, in particular the temperature control, of metal products conveyed along a single pass line by means of at least two adjacent sections |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9610465B2 (en) * | 2012-10-17 | 2017-04-04 | Hutchinson, S.A. | Fire suppression module, modular system including same, and method of installing modular system |
| EP2982453A1 (en) * | 2014-08-06 | 2016-02-10 | Primetals Technologies Austria GmbH | Adjustment of a targeted temperature profile on the strip head and strip foot before transversally cutting a metal strip |
| IT201800004170A1 (en) * | 2018-04-03 | 2019-10-03 | CONTINUOUS CASTING AND LAMINATION PLANT FOR THE PRODUCTION OF METALLURGIC PRODUCTS | |
| DE102020206175A1 (en) * | 2019-12-11 | 2021-06-17 | Sms Group Gmbh | Device and method for temperature-controlled rolling |
| DE102021211339A1 (en) * | 2020-10-13 | 2022-04-14 | Sms Group Gmbh | Device and method for the production of hot-rolled metal strips |
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| US6527882B1 (en) * | 1997-12-17 | 2003-03-04 | Sms Demag Ag | Method and installation for the continuous production of hot-rolled, thin flat products |
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- 2009-08-06 DE DE102009036378A patent/DE102009036378A1/en not_active Withdrawn
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- 2010-08-05 KR KR1020127004086A patent/KR20120047950A/en active Search and Examination
- 2010-08-05 RU RU2012108376/02A patent/RU2491356C1/en active
- 2010-08-05 CN CN201080045612.2A patent/CN102549173B/en active Active
- 2010-08-05 WO PCT/EP2010/004814 patent/WO2011015365A1/en active Application Filing
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- 2010-08-05 JP JP2012523247A patent/JP6033681B2/en active Active
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| US6527882B1 (en) * | 1997-12-17 | 2003-03-04 | Sms Demag Ag | Method and installation for the continuous production of hot-rolled, thin flat products |
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| CN104254406A (en) * | 2012-01-25 | 2014-12-31 | 西马克·西马格公司 | Method and plant for producing a metal strip |
| CN104254406B (en) * | 2012-01-25 | 2017-03-01 | Sms集团有限公司 | Method and apparatus for manufacturing sheet metal strip |
| CN108603239A (en) * | 2015-10-21 | 2018-09-28 | 奥钢联克雷姆斯有限责任公司 | The method for producing the partially hardened proximate matter of roll forming |
| CN108603239B (en) * | 2015-10-21 | 2020-08-28 | 奥钢联克雷姆斯有限责任公司 | Method for producing roll-formed partially hardened profiles |
| CN109943703A (en) * | 2017-12-21 | 2019-06-28 | 特纳瑞斯盘管有限公司 | For manufacturing the method and system of continuous pipe |
| CN114786830A (en) * | 2019-12-11 | 2022-07-22 | Sms集团有限公司 | Modular rolling train, in particular hot rolling train, preferably combined with upstream casting device |
| CN114829859A (en) * | 2019-12-11 | 2022-07-29 | Sms集团有限公司 | Device and method for flexibly influencing the process control, in particular the temperature control, of metal products conveyed along a single pass line by means of at least two adjacent sections |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013501144A (en) | 2013-01-10 |
| WO2011015365A1 (en) | 2011-02-10 |
| RU2491356C1 (en) | 2013-08-27 |
| EP2462248B1 (en) | 2018-03-14 |
| EP2462248A1 (en) | 2012-06-13 |
| KR20120047950A (en) | 2012-05-14 |
| CN102549173B (en) | 2014-07-30 |
| JP6033681B2 (en) | 2016-11-30 |
| DE102009036378A1 (en) | 2011-02-17 |
| US20120160377A1 (en) | 2012-06-28 |
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