CN102549173B - Method for producing pipe steel - Google Patents
Method for producing pipe steel Download PDFInfo
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- CN102549173B CN102549173B CN201080045612.2A CN201080045612A CN102549173B CN 102549173 B CN102549173 B CN 102549173B CN 201080045612 A CN201080045612 A CN 201080045612A CN 102549173 B CN102549173 B CN 102549173B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 238000001816 cooling Methods 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000005266 casting Methods 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000003723 Smelting Methods 0.000 claims description 56
- 238000005096 rolling process Methods 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000013461 design Methods 0.000 claims description 14
- 238000009825 accumulation Methods 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 6
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 claims 1
- 229910000742 Microalloyed steel Inorganic materials 0.000 abstract description 13
- 238000005496 tempering Methods 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 10
- 230000006698 induction Effects 0.000 description 7
- 239000002775 capsule Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000002436 steel type Substances 0.000 description 4
- 239000008186 active pharmaceutical agent Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008467 tissue growth Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Control Of Heat Treatment Processes (AREA)
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 for the manufacture of micro-alloyed steel, tubulation steel especially
method, wherein, the slab (Bramme) of casting is by an equipment, and it has casting machine, the first smelting furnace, at least one rougher (Vorwalzger ü st), the second smelting furnace, at least one planishing stand and cooling section (Kuehlstrecke) with this order on the throughput direction of slab.In addition, the present invention relates to a kind of equipment for the manufacture of micro-alloyed steel.
Background technology
Different possibilities has been described in manufacture 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 setting up is the rolling of heat engine.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 in the upper production of plate mill (Grobblechwalzwerk).But, especially for not excessive final thickness and final width, tubulation steel equally also can hot broadband unit (Warmbreitbandstra β e), so-called GSP equipment and upper manufacture of other device for hot rolling.
In the time conventionally manufacturing micro-alloyed steel and especially manufacture tubulation steel, should be specifically noted that the temperature variation (Temperaturverlauf) of the function (or function of the position of conduct in processing units) as the time.This variation and decrease distribute, and (Abnahmeverteilung) is combined to be affected the development of microstructure and determines thus machinery or the technical characteristic of steel with conclusive degree.For this reason, in finishing train, (Fertigstra β e) uses for example high-power refrigerating unit below, by means of the desired temperature variation of its capable of regulating.
Disadvantageously, known processing unit (plant) and method are not best-fits at processing micro-alloyed steel, especially neatly corresponding starting condition and requirement are reacted when tubulation steel in advance, so that with about the time or about landline
the temperature profile (Temperaturprofil) that can freely select is to a great extent processed these steel types.Can not control best and affect thus the tissue growth in steel.Therefore, the flexible manufacture of mentioned steel aspect its chemical composition 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 the method or use device may overcome mentioned shortcoming.Correspondingly, about the time or should be possible about the improved control according to the temperature variation of desired profile of delivery conduit, to can control better and regulate thus tissue growth.In addition, thus micro-alloyed steel, especially tubulation steel more flexibly processing should become possibility.
This object is the order of following steps according to method feature by solution of the present invention:
A) be defined in it by desired temperature profile in the process of equipment for slab;
B) by least one for navigate to the production line (Prozesslinie) of equipment according to the element that affects temperature of defined temperature profile temperature adjustment (Temperierung) slab, wherein, the element that affects temperature is introduced between the first smelting furnace and this at least one rougher and/or between the second smelting furnace and this at least one planishing stand;
C) in the equipment of like this design, produce slab or band, wherein, this at least one affect temperature element operated like this, make to maintain at least to a great extent defined temperature profile.
At this, apply other smelting furnace as the element that affects temperature design according to the present invention.It can be sense melt furnace (Induktionsofen) or the smelting furnace that applies (Flammenbeaufschlagung) (DFI hydroxyl fuel (Oxyfuel) smelting furnace) heating slab by direct flame.In the latter's situation, be preferably arranged to, the direct flame of slab applies by the gas-jet with at least 75% oxygen and realizes, and gaseous state or liquid fuel is by entrained gas jet.As other smelting furnace also can balance smelting furnace (Ausgleichsofen), roller hearth furnace (Rollenherdofen) or walking beam furnace (Hubbalkenofen) or pusher type furnace (Sto β ofen).
Also can use other cooling section as the element that affects temperature.It for example can relate to the band cooling section of concentrating cooling section or stratiform.
Finally also can use and suppress temperature as the element that affects temperature
element (roller-way capsule (Rollgangskapselung)).
At this, preferably determining temperature profile as basic in the situation that taking organize models.At this preferably, organize models determines 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 heating and the cooling intensity of time or road number.
An improvement project is arranged to, be implemented to the like this low temperature that enters in this at least one planishing stand by using with the element that affects temperature of the form of cooling end, make not occur to a great extent at this place's recrystallize and grain growing, wherein, enter this at least one rougher and enter with this of the form of cooling end and affect the temperature levels between the element of temperature
A) especially for the tubulation steel of the microalloy element content with low and little slab thickness, be lowered by means of the element that affects temperature of the form with cooling end, to reduce the grain size in the time entering finishing train, or
B) especially for the tubulation steel of the microalloy element content with high and large slab thickness, be enhanced by means of the element that affects temperature of the form with heating part, to guarantee in the time of roughing recrystallize completely, or
C) be only balanced and remain unchanged in addition.
In addition according to an improvement project likely, be implemented to the like this high input temp in this at least one planishing stand by using with the element that affects temperature of the form of heating part, make to finish completely at this place's recrystallize and
A) due to high temperature and decrease, during the first finish rolling road (Fertigstich) realize and then in last finish rolling road, be followed by distortion accumulation or
B), due to suitable temperature and decrease, after the accumulation of distortion before has occurred, just during last finish rolling road, realize.
For the manufacture of micro-alloyed steel, especially the equipment of tubulation steel, it has casting machine with this order on the throughput direction of slab, the first smelting furnace, at least one rougher, the second smelting furnace, at least one planishing stand and cooling section, be characterised in that according to the present invention, between the first smelting furnace and this at least one rougher and/or between the second smelting furnace and this at least one planishing stand, can selectively the element that affects temperature for temperature adjustment slab introduced to production line, wherein, this element that affects temperature can be selected from one of following element: other smelting furnace, other cooling section, suppress the element of temperature.
An improvement project is arranged to, other smelting furnace, other cooling section and suppress temperature element these affect at least one throughput direction with respect to slab in the element of temperature can transverse shifting ground layout like this, make one in element can be introduced into selectively in production line.
At this, at least one in these elements of element of other smelting furnace, other cooling section and inhibition temperature can be centered around the rotation pointing on throughput direction and arrange so swingably, makes one in element can be introduced into selectively in production line.
Utilize the solution that proposes, micro-alloyed steel, tubulation steel (for example X52 especially ... X120) improved manufacture is possible, and this causes favourable property combination.Reach intensity and and the optimum value of toughness (Zaehigkeit) and in the handiness of maximum aspect the size of used chemical composition and the finished product by the autotelic control of temperature variation.Utilize and can eliminate to a great extent according to suggestion of the present invention the restriction existing due to general so far process control.In the manufacture of steel, obtain advancing of desired temperature-time curve in very favorable mode, this allows to produce the tubulation steel with extra best best.
According to proposed mode, temperature not only can be enhanced, keep constant or reduce before roughing unit but also between roughing unit and finishing train.In the handiness that reaches top aspect temperature control, this has not only opened up and has manufactured the basic possibility of tubulation steel, and makes in addition the different methods approach for the manufacture of these steel types as requested become possibility with the different material behavior of adjustment.
In addition, many other steel types (temperature variation is played an important role therein) can obviously be manufactured with improved characteristic more without problems and in definite situation, as this is for example this situation for multi-phase Steels and all types of micro-alloyed steel.
Finally, can apply the decrease distribution of change and can carry out especially high decrease by means of the temperature variation changing.It also causes the attainable final thickness less for whole steel types and can be at additional freeboard in equipment design.
In addition, the application of the use of effective heating part (induction heating portion or the smelting furnace according to DFI hydroxyl fuel process) and/or adjustable concentrated cooling end (for example swinging the position of (Pendel) at roughing band at air place) has increased overall throughput or its simplification production process of equipment.
Therefore the mode, proposing or device made before roughing the temperature that on purpose affects slab according to material analysis, scantling and material behavior become possibility.Similarly, the temperature that on purpose affected roughing band according to material analysis, scantling and material behavior before finish rolling is possible.
Preferably, during each processing step, temperature controlled autotelic control realizes by use or the application of organize models.At this, organize models's (as already mentioned) determines 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
-for affecting roll speed and the travelling speed of temperature profile,
-heating and cooling intensity.
In addition, can realize the autotelic control of softening process dissimilar during each processing step (Entfestigungsvorgang) and the control related to this of material behavior.
The method can be used for the processing of different heat engines.
The installation of slab cooling end can realize before predeformation at slab in rougher.Similarly, the installation of induction heating portion or DFI hydroxyl fuel heating part can realize before predeformation in rougher.
Different cooling and heating installations can be changed mutually by mobile or swing.
The autotelic temperature before roughing and finish rolling of the effect by the size with to product and characteristic and equipment design improves to have the greatest impact, and accessible decrease and total decrease distribute is possible.
Thus, by autotelic (additional), cooling and/or heating improves the throughput of rolling equipment.
Brief description of the drawings
Embodiments of the invention shown in the drawings.Wherein:
Fig. 1 schematically in side view shows according to the casting rolling equipment of the first form of implementation of the present invention, it is with casting machine, the first smelting furnace, roughing unit, the second smelting furnace, finishing train and cooling section,
Fig. 2 has shown the design alternative with respect to Fig. 1 according to the casting rolling equipment of the second embodiment,
Fig. 3 has shown another design alternative with respect to Fig. 1 according to the casting rolling equipment of the 3rd embodiment,
Fig. 4 has shown another design alternative with respect to Fig. 1 according to the casting rolling equipment of the 4th embodiment,
Fig. 5 has shown another design alternative with respect to Fig. 1 according to the casting rolling equipment of the 5th embodiment,
Fig. 6 has shown another design 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 affects temperature schematically showing of casting rolling equipment, according to observing on the throughput direction of the slab of the first form of implementation of the present invention,
Fig. 9 has shown another design alternative with respect to Fig. 8 according to the element that affects temperature of the second form of implementation of the present invention,
Figure 10 has shown another design alternative with respect to Fig. 8 according to the element that affects temperature of the 3rd form of implementation of the present invention, and
Figure 11 has shown another design alternative with respect to Fig. 8 according to the element that affects temperature of the 4th form of implementation of the present invention.
Embodiment
In Fig. 1, in side-view, draw for the just equipment 2 of (according to API specification 5L) of casting and rolling tubulation on a line.It has casting machine 3 (vertical casting equipment or bending casting equipment (Bogengie β anlage)), manufactures slab 1 in known manner therein by continuous casting.The typical size of slab can be the width between the thickness and 900 to 3000mm between 50 to 150mm.On throughput direction F, casting machine 3 is followed by the first smelting furnace 4, roughing unit (wherein, unique rougher 5 (being sometimes also provided with multiple roughers) being only shown) for rolled slab, the second smelting furnace 6, finishing train (unique planishing stand 7 (being mostly provided with multiple planishing stands) is wherein only shown) and cooling section 8 for rolled slab or band.
Also have other element, it is inessential aspect temperature control or be only less important.Between casting machine 3 and the first smelting furnace 4, be furnished with shears 12, utilize its slab length that slab 1 can be cut into expectation (alternatively also can apply gas cutting equipment).Between the first smelting furnace 4 and rougher 5, be furnished with oxide skin cleanser (Zunderwaescher) 13.Before other oxide skin cleanser 14 is also located immediately at planishing stand 7.After cooling section 8 (in known manner) be provided with reeling machine (Haspel) 15, the band that it has been rolled.
Firm for tubulation, aspect the temperature control by the distance of equipment 2, there is at slab or band the requirement improving.
Before processing band, first determine about the time or about the desired temperature profile of the delivery conduit on throughput direction F.For this reason, preferably using computer assisted organize models, himself is known and it determines that in professional mode how the temperature of slab 1 or band changes, and can process best product thus.By specify the temperature range of slab 1 or band for the special position of processing units 2, below further obtain the exemplary explanation for such temperature variation.
According to the temperature profile of defined preparation machine 2 like this, the profile of expecting can be gone so.According to the present invention, this so realizes, make to realize by least one for navigate to the production line of equipment 2 according to the element that affects temperature of the temperature profile temperature adjustment slab 1 of definition, wherein, the element that affects temperature is introduced between the first smelting furnace 4 and this at least one rougher 5 and/or between the second smelting furnace 6 and this at least one planishing stand 7.
According in the embodiment of Fig. 1, the element 9 that affects temperature is cooling sections, and it is introduced in production line below effectively at the second smelting furnace 6.The cooling power required according to the temperature profile in order to reach expectation, can relate to the cooling end of concentrating cooling end or stratiform.
Cooling and by after oxide skin cleanser 14, in at least one planishing stand 7, realize (reversierend) finish rolling continuous or reversing, wherein, be preferably 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, band is rolls-up onto on reeling machine 15.Replace the band of rolling finish rolling, alternatively it also can directly be fed to correction unit (Adjustage).
Finish rolling for tubulation steel in the scope of the processing of classical heat engine, is provided with the temperature range of from 850 to 950 DEG C below at smelting furnace 6 and cooling end 9.The low temperature that enters guarantees, recrystallize and grain growing does not occur to a great extent and almost all distortion of accumulation during the rolling in finishing train of isothermal almost, thus in transformation subsequently, produce very compact grained tissue.Other prerequisite is to be typically less than enough low finishing temperatures of 820 DEG C and sufficiently high speed of cooling in cooling section.
But except the cooling end in the region between rougher 5 and planishing stand 7 described above, the temperature that affected band before entering rougher 5 can be necessary.Fig. 2 has shown that for the manufacture of according to the equipment 2 of the tubulation steel of API, therein, the part below of the first smelting furnace 4 is by being with cooling end 10 to replace for this reason.More precisely, be introduced in production line at this additional cooling section 10 as the element 10 that affects temperature.
Cooling by slab, can further improve heat engine processing degree and be limited in the grain growing between roughing unit and finishing train.But must ensure recrystallize completely at this, because which is particularly suitable for the tubulation steel with low microalloy element content and less slab thickness.
Otherwise for extra high alloying element content and large slab thickness, it can be even significant being heated to higher temperature, to being become, higher degree of deformation may and guarantee dynamic or static completely recrystallize.In addition, the temperature of raising can advantageously act on the dissolved state of microalloy element.A form of implementation of the present invention shown in Figure 3, it makes this become possibility in particularly advantageous mode.At this,, be introduced in production line with the element that affects temperature of the form of induction heating portion below and before rougher 5 at the first smelting furnace 4.
Fig. 4,5 and 6 has shown equipment scheme, therein, particularly with compare the band cooling end being arranged in before finish rolling according to Fig. 2 with 3 solution and replaced by induction heating portion or smelting furnace.
Although pursue up to now the processing (it has the maximized object of distortion of the accumulation of making) of so classical heat engine, should use diverse ways for certain steel.Replace and after the perfect recrystallization of and then roughing, abandon further softening in the region of finishing train, pursue recrystallize again.This recrystallize needs high temperature, and it particularly advantageously can produce by 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 be followed by distortion during the first finish rolling road in last finish rolling road, and or for so not high temperature and degree of deformation, distortion be accumulated in the first finish rolling road in occur after, dynamic recrystallize just occurs during last finish rolling road.In two kinds of situations, compared with the processing of classical heat engine, 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, thereby softening trend obviously increases.
By the possibility for temperature impact according to expansion of the present invention, can in each battery limits, meet the requirement of the contradiction so far to temperature variation, thereby in each in each district, make the process trend (Prozessverlauf) of the best aspect product performance become possibility, i.e. advancing along the temperature variation of the optimal selection of throughput direction F in slab or in band.Thus, provide material behavior to expecting or the coupling flexibly of scantling or different material analysis.
Meanwhile, affecting temperature control is efficient instrument so that the load of impact in rougher and planishing stand and decrease distribute, this can be used for reducing minimum accessible final thickness and or in design, employ less equipment.
The description explanation of the multifarious effect of temperature variation to microstructure, the control of tissue growth is necessary at any time, and in the time that process is monitored and/or controls or regulated by suitable organize models, tubulation steel so especially causes the mechanical characteristics of expecting according to the rolling of proposed mode.
On identical equipment, when rolling Standard Steel, before finishing train, conventionally use the temperature of about 1000 to 1150 DEG C, but in special situation, also higher or lower.Increase along with the complicacy of alloy scheme for the necessity of adjusting different temperature.Advantageous particularly for multi-phase Steels and different micro-alloyed steel which.Utilize the equipment scheme slab, thin slab, Intermediate Gray, band and the sheet material in most applications that propose can be brought on pursued temperature levels, thereby aspect desired material behavior, do not have any restriction.
Be arranged in order to mate best corresponding process condition, in the direction transverse to throughput direction F movably or enforcement swingably, and one or another equipment 9,10 can be activated for 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).
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 production line.This is suitable for distinct device before roughing equipment and afterwards.
Casting machine 3 can be together with milling train unit 5 or with its semistall be arranged in production line.For this reason, with reference to figure 7, can in vertical view, observe therein corresponding example.At this, two upper casting machine 3 ' layouts parallel to each other, after it, slab is by means of gas cutting machine 12 ' the be separated into length of expectation.By means of walking beam furnace 4 ' or pusher type furnace can be on the horizontal Q with respect to throughput direction F by slab 1 production line L below two production line L are above shifted onto; For the other equipment unit of processing band in production line below.The production line L of bottom has casting machine 3 equally, is furnished with shears 12 after it.
By smelting furnace 4,4 ' slab 1 the is heated to roughing temperature of about 1100 to 1200 DEG C.After oxide skin cleanser 13, roughing one or alternatively at multiple roughers 5 places continuously or reversing be implemented on interior thickness.
Utilization also can affect smelting furnace in the selection of the roll speed at rougher 5 places and enter temperature.
Be furnished with the second smelting furnace 6 below as keeping smelting furnace (Halteofen) at rougher 5.Keep smelting furnace 6 that enough spaces are provided, to can fully be contained in the thin slab of distortion in rougher 5.The short swing of the thin slab of distortion also can occur in smelting furnace 6.
Replace and keep 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 is positioned with the element that affects temperature 9 with the form of cooling section in production line L, utilizes it can slab 1 be taken to the temperature of expectation before finish rolling in planishing stand 7.Alternatively, before band cooling end 9 also can be positioned at and keep smelting furnace or before roller-way capsule.
That in Fig. 8 to 11, has drawn side direction on the element 9,10 by affecting temperature moves or swings in and show the details of changing different equipment.In addition can make by suitable mobile devices if desired, three different equipment are shared a position in production line.
In Fig. 8, observable goes out, and how additional smelting furnace (left side in Fig. 8) or sense melt furnace (the right in Fig. 8) alternatively can be sailed in production line L by moving to the upper quilt of horizontal direction Q.Two smelting furnaces of deviation post (Ausweichposition) 16,16 ' permission in production line L both sides move to the right or on the contrary from shown position simultaneously.
In Fig. 9, draw similar situation for the element that affects temperature 9,10 that alternatively can introduce the form with cooling end (left side in Fig. 9) and sense melt furnace (the right in Fig. 9) in production line L.And such rooty is suitable for roller hearth furnace (left side) and slab cooling end (the right) according to Figure 10.
In Figure 11, observable goes out, and can be swung around rotation 11 with the element that affects temperature 9 of the form of cooling beam (K ü hlbalken), engages or deviates to bring it to.And that sense melt furnace 10 can be arranged in direction Q transverse shifting is upper, so as (in the time that 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 affect the element of temperature
10 affect the element of temperature
11 axiss of oscillation
12 shearss
12 ' gas cutting equipment
13 oxide skin cleansers
14 oxide skin cleansers
15 reeling machines
16 deviation posts
16 ' deviation post
F throughput direction
Q transverse shifting direction
L production line
Claims (14)
1. the method for the manufacture of tubulation steel, wherein, the slab (1) of casting is by equipment (2), on its throughput direction in described slab (1) (F), there is in order casting machine (3), the first smelting furnace (4), at least one rougher (5), the second smelting furnace (6), at least one planishing stand (7) and cooling section (8), wherein, described method comprises:
A) be defined in desired temperature profile in its process by described equipment (2) for described slab (1);
B) by least one for according to the element that affects temperature (9 of slab (1) described in defined described temperature profile temperature adjustment, 10) navigate in the production line (L) of described equipment (2), wherein, the first element (10) that affects temperature is introduced between described the first smelting furnace (4) and described at least one rougher (5) and/or the second element (9) that affects temperature is introduced between described the second smelting furnace (6) and described at least one planishing stand (7);
C) in the described equipment (2) of design like this, produce described slab (1) or band, wherein, described at least one element (9,10) that affects temperature is operated like this, make to maintain at least to a great extent defined described temperature profile, wherein
By use be implemented to the second element (9) that affect temperature of the form of cooling end described in the like this low temperature that enters at least one planishing stand (7), make not occur to a great extent at this place's recrystallize and grain growing, wherein, described in entering described at least one rougher (5) and entering, affect the temperature levels between the element (9) of temperature with second of the form of cooling end
Aa) for the tubulation steel of the microalloy element content with low and little slab thickness, the element (10) that affects temperature by means of first of the form with cooling end is lowered, to reduce the grain size in the time entering described planishing stand (7), or
Bb) for the tubulation steel of the microalloy element content with high and large slab thickness, the element (10) that affects temperature by means of first of the form with heating part is enhanced, to guarantee in the time of roughing recrystallize completely, or
Cc) be only balanced and remain unchanged in addition; Or
Like this high input temp described in being implemented to the first element (10) that affect temperature of the form of heating part by application at least one planishing stand (7), make to finish completely at this place's recrystallize and
Aa) due to high temperature and decrease, during the first finish rolling road realize and then in last finish rolling road, be followed by distortion accumulation or
Bb), due to suitable temperature and decrease, after the accumulation of distortion before has occurred, just during last finish rolling road, realize.
2. method according to claim 1, is characterized in that, uses other smelting furnace as the element (9,10) that affects temperature.
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 described other smelting furnace, is applied and is realized the described slab of heating (1) by direct flame.
5. method according to claim 4, is characterized in that, applies by the direct flame of realizing described slab (1) with the gas-jet of at least 75% oxygen, and gaseous state or liquid fuel is sneaked in described gas-jet.
6. method according to claim 2, is characterized in that, as other smelting furnace balance 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 makes the described slab can axial transport.
9. method according to claim 1, is characterized in that, uses other cooling section as the element (9,10) that affects temperature.
10. method according to claim 9, is characterized in that, uses and concentrates cooling section as other cooling section.
11. methods according to claim 9, is characterized in that, use the band cooling section of stratiform as other cooling section.
12. methods according to claim 1, is characterized in that, use as the element (9,10) that affects temperature the element that suppresses temperature.
13. according to the method described in any one in claim 1 to 12, it is characterized in that, is determining described temperature profile taking organize models as basic in the situation that.
14. methods according to claim 13, it is characterized in that, described organize models determines 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 heating and the cooling intensity of time or road number.
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 CN102549173A (en) | 2012-07-04 |
| CN102549173B true 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) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI552812B (en) * | 2012-01-25 | 2016-10-11 | Sms Group Gmbh | Verfahren und anlage zur herstellung eines metallbandes |
| ES2802812T3 (en) * | 2012-10-17 | 2021-01-21 | Hutchinson Sa | Fire extinguishing module, modular system including the same and installation method of the 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 |
| EP3159419B1 (en) * | 2015-10-21 | 2018-12-12 | Voestalpine Krems Gmbh | Method of fabrication of roll formed partly 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 |
| 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 |
| WO2021115900A1 (en) * | 2019-12-11 | 2021-06-17 | Sms Group Gmbh | Modular rolling train, particularly hot rolling train, preferably in conjunction with an upstream casting facility |
| DE102020206176A1 (en) * | 2019-12-11 | 2021-06-17 | Sms Group Gmbh | Device and method for flexibly influencing the process control, in particular the temperature control, of a metal product passed along a single flow line by means of at least two adjacent segments |
| 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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| CN1195584A (en) * | 1997-04-10 | 1998-10-14 | 丹尼利机械设备股份公司 | Rolling method for thin flat products and relative rolling line |
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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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| SU691219A1 (en) * | 1976-09-27 | 1979-10-15 | Коммунарский горно-металлургический институт | Method for continuous hot rolling of strip |
| AT398396B (en) | 1993-02-16 | 1994-11-25 | Voest Alpine Ind Anlagen | METHOD FOR PRODUCING A TAPE, PRE-STRIP OR A LAM |
| DE19540978A1 (en) * | 1995-11-03 | 1997-05-07 | Schloemann Siemag Ag | Production plant for the continuous or discontinuous rolling out of hot strip |
| NL1001976C2 (en) * | 1995-12-22 | 1997-06-24 | Hoogovens Groep Bv | Method and device for continuous casting of steel. |
| DE10203711A1 (en) * | 2002-01-31 | 2003-08-14 | Sms Demag Ag | Process and plant for the production of hot strip from austenitic stainless steels |
| US20050115649A1 (en) | 2003-03-27 | 2005-06-02 | Tokarz Christopher A. | Thermomechanical processing routes in compact strip production of high-strength low-alloy steel |
| JP4696615B2 (en) | 2005-03-17 | 2011-06-08 | 住友金属工業株式会社 | High-tensile steel plate, welded steel pipe and manufacturing method thereof |
| DE102006054932A1 (en) * | 2005-12-16 | 2007-09-13 | Sms Demag Ag | Method and device for producing a metal strip by casting rolls |
| DE102008029581A1 (en) | 2007-07-21 | 2009-01-22 | Sms Demag Ag | Method and apparatus for making strips of silicon or multi-phase steel |
| DE102008020412A1 (en) | 2007-08-24 | 2009-02-26 | Sms Demag Ag | Method and device for producing a metal strip by casting rolls |
| DE102008003222A1 (en) * | 2007-09-13 | 2009-03-19 | Sms Demag Ag | Compact flexible CSP system for continuous, semi-continuous and batch operation |
-
2009
- 2009-08-06 DE DE102009036378A patent/DE102009036378A1/en not_active Withdrawn
-
2010
- 2010-08-05 RU RU2012108376/02A patent/RU2491356C1/en active
- 2010-08-05 WO PCT/EP2010/004814 patent/WO2011015365A1/en active Application Filing
- 2010-08-05 KR KR1020127004086A patent/KR20120047950A/en active Search and Examination
- 2010-08-05 US US13/388,172 patent/US20120160377A1/en not_active Abandoned
- 2010-08-05 EP EP10745149.4A patent/EP2462248B1/en active Active
- 2010-08-05 JP JP2012523247A patent/JP6033681B2/en active Active
- 2010-08-05 CN CN201080045612.2A patent/CN102549173B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1195584A (en) * | 1997-04-10 | 1998-10-14 | 丹尼利机械设备股份公司 | Rolling method for thin flat products and relative rolling line |
| CN1207965A (en) * | 1997-06-16 | 1999-02-17 | Sms舒路曼－－斯玛公司 | Method and equipment for rolling hot-rolling wide strip steel in small sized strip steel production equipment |
| US6527882B1 (en) * | 1997-12-17 | 2003-03-04 | Sms Demag Ag | Method and installation for the continuous production of hot-rolled, thin flat products |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2462248B1 (en) | 2018-03-14 |
| DE102009036378A1 (en) | 2011-02-17 |
| WO2011015365A1 (en) | 2011-02-10 |
| CN102549173A (en) | 2012-07-04 |
| KR20120047950A (en) | 2012-05-14 |
| US20120160377A1 (en) | 2012-06-28 |
| JP2013501144A (en) | 2013-01-10 |
| EP2462248A1 (en) | 2012-06-13 |
| RU2491356C1 (en) | 2013-08-27 |
| JP6033681B2 (en) | 2016-11-30 |
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