EP1015653A1 - Metallurgical vessel - Google Patents

Metallurgical vessel

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Publication number
EP1015653A1
EP1015653A1 EP98947371A EP98947371A EP1015653A1 EP 1015653 A1 EP1015653 A1 EP 1015653A1 EP 98947371 A EP98947371 A EP 98947371A EP 98947371 A EP98947371 A EP 98947371A EP 1015653 A1 EP1015653 A1 EP 1015653A1
Authority
EP
European Patent Office
Prior art keywords
steel
tempering
metallurgical vessel
shots
parts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98947371A
Other languages
German (de)
French (fr)
Other versions
EP1015653B1 (en
Inventor
Walter Bendick
Günter Schmitz
Siegfried Müller
Dieter Uwer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1015653A1 publication Critical patent/EP1015653A1/en
Application granted granted Critical
Publication of EP1015653B1 publication Critical patent/EP1015653B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium

Definitions

  • the invention relates to a metallurgical vessel, in particular a converter for the treatment of liquid metal melts, consisting of a refractory lining and a supporting metal jacket surrounding it, according to the preamble of claim 1.
  • Metallurgical vessels such as B. Converters or steelworks pans are exposed to the static load from the weight of the lining and the filled molten metal also to a thermal load due to the high temperatures.
  • the supporting metal jacket of these vessels must therefore be made of a material that has a certain creep rupture strength, for. B. for 100 000 h based on a predetermined temperature.
  • the maximum temperature that can be tolerated is 400 ° C.
  • the increasing secondary metallurgical treatment e.g. B. vacuum treatment
  • a higher melting temperature to compensate for this temperature loss.
  • the aim is a tolerable temperature of 500 ° C., preferably 550 ° C.
  • heat-resistant steels are known that are suitable for this temperature range, for example 15 Mo 3, 13 CrMo 44 or 10 CrMo 9.10.
  • all these steels have the major disadvantage that after welding, the component has to be stress relieved at a temperature of around 700 ° C.
  • the object of the invention is to provide a metallurgical vessel of the generic type, the load-bearing metal jacket of a sufficient creep resistance up to max. 550 ° C and which requires no stress relief annealing after welding.
  • Wall thicknesses are sometimes required for the intended use. Usually, the known fine grain steel for sheet thicknesses up to max. 50 mm.
  • the metallurgical vessel designed according to the invention is explained in more detail using the manufacturing method. Show it:
  • Figure 2 is an external view of Figure 1
  • FIG. 1 shows a longitudinal section of a converter 1 produced according to the invention.
  • This has a metal jacket 2 composed of a plurality of sections 6, 7 and dome parts 8, a foot ring 3 arranged on the bottom and a muzzle ring 4 arranged on the upper edge.
  • Refractory material 5 is arranged within the metal shell 2, the thickness of which decreases with the travel time of the converter 1 as a result of burning and washing out. The decreasing insulating thickness of the refractory material leads to higher temperatures in the metal jacket, which must be endured in the long run.
  • FIG. 2 shows an external view of the converter 1 shown in FIG. 1.
  • a steel melt is treated with calcium and vacuum before pouring and then shows the following actual analysis in percent by weight.
  • This molten steel is cast in a continuous casting process to form a slab with a thickness of 260 mm and a width of 2300 mm. After cooling and
  • the slab is rolled out in several passes from a sheet with a thickness of 80 mm and a width of 2900 mm and a length of 6000 mm.
  • the individual shape change 8 h in the individual stitches is greater than 0.1.
  • the heavy plate produced in this way is subjected to tempering, consisting of heating to an austenite temperature of 920 ° C with subsequent water quenching. This heat treatment can be repeated depending on the requirements for fine grain. Finally, it is tempered at 700 ° C with subsequent cooling in air. After tempering, the heavy plates are cut to the required bending dimensions. This is followed by bending into shells
  • the otherwise required stress relief annealing after welding can be omitted according to the invention.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

Disclosed is a metallurgical vessel, in particular a converter for treating liquid molten metals, in particular steel, formed of a refractory lining and a supporting metal shell that surrounds the refractory lining. The vessel is composed of welded together shell rings and dished parts of creep-resistant steel with plate thicknesses of up to 100 mm. The creep-resistant steel used is a highly resistant, water-quenched and then tempered close-grained structural steel with the following composition in wt.-%C 0.14-0.22Cr 0.4-1.0Mo 0.3-0.8Ni 1.5-3.0V 0.05-0.12Mn 0.7-1.3Pmax 0.015Smax 0.003Al 0.015-0.065Si 0.20-0.60Cumax 0.15Nmax 0.012Camax 0.004the remainder being iron and impurities due to the production process.

Description

Metallurgisches Gefäß Metallurgical vessel
Beschreibungdescription
Die Erfindung betrifft ein metallurgisches Gefäß, insbesondere Konverter für die Behandlung flüssiger Metallschmelzen, bestehend aus einer feuerfesten Ausmauerung und einem diese umgebenden tragenden Metallmantel gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a metallurgical vessel, in particular a converter for the treatment of liquid metal melts, consisting of a refractory lining and a supporting metal jacket surrounding it, according to the preamble of claim 1.
Metallurgische Gefäße, wie z. B. Konverter oder Stahlwerkspfannen sind neben der statischen Belastung durch das Gewicht der Ausmauerung sowie der eingefüllten flüssigen Metallschmelze auch einer thermischen Belastung infolge der hohen Temperaturen ausgesetzt. Der tragende Metallmantel dieser Gefäße muss deshalb aus einem Werkstoff gefertigt sein, der eine bestimmte Zeitstandfestigkeit, z. B. für 100 000 h bezogen auf eine vorgegebene Temperatur aufweist. Für die bisher verwendeten Stähle, z. B. WStE. 355 liegt die ertragbare Maximaltemperatur bei 400 ° C. Infolge der Verwendung hochkohlenstoffhaltiger Ausmauerung verbunden mit einem starken Abbrand der Ausmauerung gegen Ende der Reise steigen dieMetallurgical vessels, such as B. Converters or steelworks pans are exposed to the static load from the weight of the lining and the filled molten metal also to a thermal load due to the high temperatures. The supporting metal jacket of these vessels must therefore be made of a material that has a certain creep rupture strength, for. B. for 100 000 h based on a predetermined temperature. For the steels previously used, e.g. B. WStE. 355, the maximum temperature that can be tolerated is 400 ° C. As a result of the use of high-carbon brick lining combined with a strong burning of the brick lining towards the end of the trip, the rise
Gefäßmanteltemperaturen. Darüber hinaus erfordert die zunehmende sekundärmetallurgische Behandlung, z. B. Vakuumbehandlung, die häufig mit nicht unerheblichen Temperaturverlusten verbunden ist, eine höhere Schmelztemperatur, um diesen Temperaturverlust zu kompensieren. Dies bedingt eine höhere thermische Belastung des Gefäßes, sei es Konverter oder Pfanne, so dass die Forderung nach einer bei höherer Temperatur liegenden ausreichenden Zeitstandfestigkeit zwingend wurde. Angestrebt wird eine ertragbare Temperatur von 500 ° C, vorzugsweise von 550 ° C. Aus dem Kesselrohrbereich sind warmfeste Stähle bekannt, die für diesen Temperaturbereich geeignet sind, beispielsweise 15 Mo 3, 13 CrMo 44 oder 10 CrMo 9.10. Alle diese Stähle haben aber den großen Nachteil, dass nach dem Schweißen das Bauteil bei einer Temperatur um 700 ° C spannungsarm geglüht werden muss. Das erfordert große Öfen und einen entsprechenden Energieaufwand, sowie das dazu erforderliche Handling. Insbesondere bei Reparaturen an den Gefäßen tritt der genannte Nachteil besonders hervor. Reparaturen sind dann notwendig, wenn wegen zu großen Ausmauerungsabbrandes die flüssige Metallschmelze den Gefäßmantel aufgeschmolzen und teilweise zerstört hat.Vascular jacket temperatures. In addition, the increasing secondary metallurgical treatment, e.g. B. vacuum treatment, which is often associated with significant temperature losses, a higher melting temperature to compensate for this temperature loss. This results in a higher thermal load on the vessel, be it a converter or a pan, so that the requirement for an adequate creep rupture strength at a higher temperature has become imperative. The aim is a tolerable temperature of 500 ° C., preferably 550 ° C. From the boiler tube area, heat-resistant steels are known that are suitable for this temperature range, for example 15 Mo 3, 13 CrMo 44 or 10 CrMo 9.10. However, all these steels have the major disadvantage that after welding, the component has to be stress relieved at a temperature of around 700 ° C. This requires large ovens and a corresponding amount of energy, as well as the necessary handling. The mentioned disadvantage is particularly pronounced in the case of repairs to the vessels. Repairs are necessary if the liquid metal melt has melted and partially destroyed the vessel shell due to excessive wall burn-up.
Aufgabe der Erfindung ist es, ein metallurgisches Gefäß der gattungsmäßigen Art anzugeben, dessen tragender Metallmantel eine ausreichende Zeitstandfestigkeit bis zu max. 550 ° C aufweist und bei dem nach dem Schweißen keine Spannungsarmglühung erforderlich ist.The object of the invention is to provide a metallurgical vessel of the generic type, the load-bearing metal jacket of a sufficient creep resistance up to max. 550 ° C and which requires no stress relief annealing after welding.
Diese Aufgabe wird ausgehend vom Oberbegriff in Verbindung mit den kennzeichnenden Merkmalen des Anspruches 1 gelöst. Vorteilhafte Weiterbildungen sowie ein Verfahren zur Herstellung eines solchen Gefäßes sind Bestandteil von Unteransprüchen.This object is achieved on the basis of the preamble in conjunction with the characterizing features of claim 1. Advantageous further developments and a method for producing such a vessel are part of subclaims.
Bei der systematischen Suche nach einem geeigneten Stahl für den Metallmantel wurde festgestellt, dass ein an sich bekannter hochfester wasservergüteter Feinkornbaustahl für diesen Verwendungszweck gut geeignet ist. Üblicherweise wird dieser Feinkornbaustahl mit einer Streckgrenze von min. 890 N/mm 2 im Fahrzeugbau, bei Hebevorrichtungen, Bergbaugeräten und Gebläselaufrädern eingesetzt. Dabei ist die hohe Streckgrenze im Bezug auf möglichst geringe Wanddicken und eine ausreichende Tieftemperatur von besonderer Bedeutung (siehe Firmenprospekt Thyssen Stahl AG XAB090 / XAB0960 Hochfeste vergütete Feinkornbaustähle 1993).During the systematic search for a suitable steel for the metal jacket, it was found that a known, high-strength, water-tempered fine-grain structural steel is well suited for this purpose. Usually, this fine-grain structural steel with a yield strength of min. 890 N / mm 2 used in vehicle construction, lifting devices, mining equipment and blower impellers. The high yield strength in relation to the smallest possible wall thicknesses and a sufficient low temperature is of particular importance (see company brochure Thyssen Stahl AG XAB090 / XAB0960 high-strength tempered fine-grain structural steels 1993).
Zahlreiche Versuche mit diesem Feinkornbaustahl haben nun ergeben, dass durch eine Modifikation der Analyse sowie durch eine gezielte Anlassbehandlung beim Vergüten Warmfestigkeiten erreichbar sind, die den Einsatz für metallurgische Gefäße interessant machen. Die niedriger als 890 N/mm 2 liegende Streckgrenze wird dabei in Kauf genommen, da diese nicht das entscheidende Kriterium ist. Trotzdem ermöglicht die weiterhin hohe Streckgrenze von min. 650 N/mm 2 eine gewisse Reduktion der Wanddicke, was für die Gesamtkonstruktion von Vorteil ist. Der entscheidende Vorteil ist aber, dass nach dem Schweißen keine Spannungsarmglühung erforderlich ist. Dadurch wird zum einen Energie eingespart und das Herstellverfahren vereinfacht. Der angehobene Nickelgehalt in der Analyse ermöglicht eine Durchvergütung auch von Blechdicken bis zu 100 mm. SolcheNumerous tests with this fine-grained structural steel have now shown that a modification of the analysis as well as a specific tempering treatment during tempering make it possible to achieve heat strengths that make it interesting for use in metallurgical vessels. The yield strength lower than 890 N / mm 2 is accepted, since this is not the decisive criterion. Nevertheless, the still high yield strength of min. 650 N / mm 2 a certain Reduction of the wall thickness, which is an advantage for the overall construction. The decisive advantage, however, is that no stress relief annealing is required after welding. On the one hand, this saves energy and simplifies the manufacturing process. The increased nickel content in the analysis enables through-hardening of sheet thicknesses up to 100 mm. Such
Wanddicken sind bei dem vorgesehenen Verwendungszweck teilweise erforderlich. Üblicherweise ist der bekannte Feinkornbaustahl für Blechdicken bis zu max. 50 mm ausgelegt.Wall thicknesses are sometimes required for the intended use. Usually, the known fine grain steel for sheet thicknesses up to max. 50 mm.
Anhand eines Ausführungsbeispieles wird das erfindungsgemäß ausgebildete metallurgische Gefäß anhand des Herstellverfahrens näher erläutert. Es zeigen:Using an exemplary embodiment, the metallurgical vessel designed according to the invention is explained in more detail using the manufacturing method. Show it:
Figur 1 einen Längsschnitt durch einen erfindungsgemäß hergestellten1 shows a longitudinal section through a manufactured according to the invention
Konverterconverter
Figur 2 eine Außenansicht von Figur 1Figure 2 is an external view of Figure 1
Figur 1 zeigt in einem Längsschnitt einen erfindungsgemäß hergestellten Konverter 1. Dieser weist einen aus mehreren Schüssen 6, 7 und Kümpelteilen 8 zusammengesetzten Metallmantel 2, einen am Boden angeordneten Fußring 3 und einen am oberen Rand angeordneten Mündungsring 4 auf. Innerhalb des Metallmantels 2 ist Feuerfestmaterial 5 angeordnet, dessen Dicke mit der Reisezeit des Konverters 1 infolge Abbrennens und Auswaschens abnimmt. Die abnehmende isolierende Dicke des Feuerfestmaterials führt zu höheren Temperaturen im Metallmantel, die auf Dauer ertragen werden müssen.1 shows a longitudinal section of a converter 1 produced according to the invention. This has a metal jacket 2 composed of a plurality of sections 6, 7 and dome parts 8, a foot ring 3 arranged on the bottom and a muzzle ring 4 arranged on the upper edge. Refractory material 5 is arranged within the metal shell 2, the thickness of which decreases with the travel time of the converter 1 as a result of burning and washing out. The decreasing insulating thickness of the refractory material leads to higher temperatures in the metal jacket, which must be endured in the long run.
Figur 2 zeigt eine Außenansicht des in Figur 1 dargestellten Konverters 1. In dieser Darstellung kann man gut die einzelnen Schüsse 6.1 - 6.3; 7.1 - 7.3 und Kümpelteile 8.1 - 8.3 mit den sie verbindenden Schweißnähten 9 - 13 erkennen. Am Beispiel eines Schusses 6.2 wird das erfindungsgemäße Herstellungsverfahren mit den wesentlichen Arbeitsschritten erläutert. Eine Stahlschmelze wird vor dem Abgießen kalzium- und vakuumbehandelt und weist danach folgende IST-Analyse in Gewichtsprozent auf. C 0,17, Cr 0,70, Mo 0,52, Ni 1 ,90, V 0,093, Mn 0,92, P 0,012, S 0,002, AI 0,020, Si 0,25, Cu 0,13, N 0,009, Ca 0,002, Rest Eisen und herstellbedingte Verunreinigungen.FIG. 2 shows an external view of the converter 1 shown in FIG. 1. In this illustration, the individual shots 6.1 - 6.3; 7.1 - 7.3 and debris parts 8.1 - 8.3 with the welding seams 9 - 13 connecting them. Using the example of a shot 6.2, the manufacturing method according to the invention is explained with the essential work steps. A steel melt is treated with calcium and vacuum before pouring and then shows the following actual analysis in percent by weight. C 0.17, Cr 0.70, Mo 0.52, Ni 1, 90, V 0.093, Mn 0.92, P 0.012, S 0.002, AI 0.020, Si 0.25, Cu 0.13, N 0.009, Ca 0.002, balance iron and manufacturing-related impurities.
Diese Stahlschmelze wird im Stranggießverfahren zu einer Bramme mit einer Dicke von 260 mm und einer Breite von 2300 mm vergossen. Nach dem Abkühlen undThis molten steel is cast in a continuous casting process to form a slab with a thickness of 260 mm and a width of 2300 mm. After cooling and
Wiedererwärmen der Bramme in einem Stoßofen auf eine Temperatur von ca. 1250 °C wird in einem Warmwalzwerk in mehreren Stichen aus der Bramme ein Blech mit einer Dicke von 80 mm und einer Breite von 2900 mm und einer Länge von 6000 mm ausgewalzt. Die Einzelformänderung 8 h in den einzelnen Stichen ist dabei größer als 0,1. Das so hergestellte Grobblech wird einer Vergütung unterzogen, bestehend aus einer Erwärmung auf Austenittemperatur von 920 °C mit nachfolgender Wasserabschreckung. Je nach Anforderung an die Feinkörnigkeit kann diese Wärmebehandlung wiederholt werden. Abschließend erfolgt ein Anlassen bei 700 °C mit nachfolgender Abkühlung an Luft. Nach dem Vergüten werden die Grobbleche auf die erforderlichen Biegemaße beschnitten. Danach erfolgt ein Biegen zu Schalen beiReheating the slab in a pusher furnace to a temperature of approx. 1250 ° C. In a hot rolling mill, the slab is rolled out in several passes from a sheet with a thickness of 80 mm and a width of 2900 mm and a length of 6000 mm. The individual shape change 8 h in the individual stitches is greater than 0.1. The heavy plate produced in this way is subjected to tempering, consisting of heating to an austenite temperature of 920 ° C with subsequent water quenching. This heat treatment can be repeated depending on the requirements for fine grain. Finally, it is tempered at 700 ° C with subsequent cooling in air. After tempering, the heavy plates are cut to the required bending dimensions. This is followed by bending into shells
Raumtemperatur oder falls der Walzdruck nicht ausreicht, bei einer Erwärmung auf bis zu 650 °C. Die gebogenen Schalen werden auf Soll-Maß geschnitten und die Schweißkanten angearbeitet. Bei der Vormontage werden mehrere Schalen zusammengestellt, vermessen und geheftet. Anschließend erfolgt das Verschweißen in transportfähige Einheiten. Auf der Baustelle werden die einzelnen Schüsse bzw.Room temperature or if the rolling pressure is not sufficient, when heated up to 650 ° C. The bent shells are cut to the required size and the welding edges are worked on. During the pre-assembly, several trays are put together, measured and stapled. The welding is then carried out in transportable units. On the construction site, the individual shots or
Kümpelteile zusammengesetzt und beispielsweise zu einem Konverter zusammengeschweißt. Die ansonsten erforderliche Spannungsarmglühung nach dem Schweißen kann erfindungsgemäß entfallen. Dump parts assembled and welded together, for example, to form a converter. The otherwise required stress relief annealing after welding can be omitted according to the invention.

Claims

Pateπtansprüche Patent claims
1. Metallurgisches Gefäß, insbesondere Konverter für die Behandlung flüssiger Metallschmelzen, insbesondere Stahl, bestehend aus einer feuerfesten1. Metallurgical vessel, in particular converter for the treatment of molten metal, in particular steel, consisting of a refractory
Ausmauerung und einem diese umgebenden tragenden Metallmantel, der aus miteinander verschweißten Kümpelteilen und Schüssen aus warmfestem Stahl zusammengesetzt ist mit Blechdicken bis zu 100 mm, dadurch gekennzeichnet, dass als warmfester Stahl ein hochfester wasservergüteter Feinkornbaustahl eingesetzt wird mit einer Analyse in GewichtsprozentBrick lining and a surrounding metal sheath, which is composed of welded parts and shells made of heat-resistant steel with sheet thicknesses of up to 100 mm, characterized in that a high-strength water-tempered fine-grained structural steel is used as the heat-resistant steel with an analysis in percent by weight
C 0,14-0,22C 0.14-0.22
Cr 0,4- 1,0 Mo 0,3-0,8Cr 0.4-1.0 Mo 0.3-0.8
Ni 1,5-3,0Ni 1.5-3.0
V 0,05-0,12V 0.05-0.12
Mn 0,7- 1,3 S max 0,003Mn 0.7-1.3 S max 0.003
AI 0,015-0,065 Si 0,20-0,60 Cumax 0,15 N maχ 0,012 Camax 0,004AI 0.015-0.065 Si 0.20-0.60 Cu max 0.15 N ma χ 0.012 Ca m ax 0.004
Rest Eisen und herstellbedingte Verunreinigungen.Balance iron and manufacturing-related impurities.
2. Metallurgisches Gefäß nach Anspruch 1, dadurch gekennzeichnet, dass die Zeitstandfestigkeit für 0000 h bei 500 ° C 220 N/mm 2 und für2. Metallurgical vessel according to claim 1, characterized in that the creep rupture strength for 0000 h at 500 ° C 220 N / mm 2 and for
550 °C 130 N/mm2 beträgt.550 ° C is 130 N / mm 2 .
3. Verfahren zur Herstellung eines metallurgischen Gefäßes nach Anspruch 1 mit den Verfahrensschritten Erschmelzen eines beruhigten Stahles nach dem3. A method for producing a metallurgical vessel according to claim 1 with the method steps Melt a calmed steel after the
Sauerstoffblasverfahren mit einer Analyse entsprechend Anspruch 1Oxygen blowing method with an analysis according to claim 1
Stranggießen einer BrammeContinuous casting of a slab
Erwärmen der Bramme - Auswalzen zu GrobblechHeating the slab - rolling it out to heavy plate
Vergüten des GrobblechesTempering the heavy plate
Ausbrennen von BlechteilenBurning out sheet metal parts
Biegen zu Schüssen und / oder Pressen zu KümpelteilenBend to shots and / or presses to pieces
Schweißen der Schüsse bzw. Kümpelteile zu einem Metallmantel - SpannungsarmglühenWelding the shots or dice parts to a metal jacket - stress relief annealing
Anbringen der feuerfesten Ausmauerung dadurch gekennzeichnet, dass vor dem Abgießen der Stahl über Einblasen einer Calciumlegierung in das Stahlbad kalziumbehandelt und anschließend vakuumbehandelt wird und das Warmwalzen mit mehreren Umformstichen, die eine Einzelformänderung vonAttaching the refractory lining characterized in that before the steel is poured, calcium is blown into the steel bath by blowing a calcium alloy and then vacuum-treated and hot rolling with several forming stitches, which change the individual shape
8 h 0,1 haben, in Verbindung mit einem Vergüten durchgeführt wird, wobei nach dem Verschweißen der aus dem Grobblech hergestellten Schüsse bzw. Kümpelteile das Spannungsarmglühen entfällt.8 h 0.1, is carried out in connection with tempering, whereby after the welding of the shots or dished parts made from the heavy plate, the stress relief annealing is omitted.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass das Vergüten eine Wasserabschreckung aus dem Austenitgebiet mit einem abschließenden Anlassen beinhaltet.4. The method according to claim 3, characterized in that the tempering includes a water quench from the austenite area with a final tempering.
5. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass das Vergüten eine zweifache Erwärmung auf Austenittemperatur mit jeweiligem Wasserabschrecken und einem abschließenden Anlassen beinhaltet.5. The method according to claim 3, characterized in that the tempering includes double heating to the austenite temperature with respective water quenching and a final tempering.
6. Verfahren nach Anspruch 4 und 5, dadurch gekennzeichnet, dass die Anlasstemperatur im Bereich zwischen 690 - 720 ° C liegt. 6. The method according to claim 4 and 5, characterized in that the tempering temperature is in the range between 690 - 720 ° C.
EP98947371A 1997-08-19 1998-07-24 Metallurgical vessel Expired - Lifetime EP1015653B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19736720A DE19736720C1 (en) 1997-08-19 1997-08-19 Metallurgical vessel
DE19736720 1997-08-19
PCT/DE1998/002203 WO1999009232A1 (en) 1997-08-19 1998-07-24 Metallurgical vessel

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Publication Number Publication Date
EP1015653A1 true EP1015653A1 (en) 2000-07-05
EP1015653B1 EP1015653B1 (en) 2002-01-09

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Country Status (8)

Country Link
US (1) US6368549B1 (en)
EP (1) EP1015653B1 (en)
JP (1) JP2001515148A (en)
AT (1) ATE211778T1 (en)
AU (1) AU9431498A (en)
DE (2) DE19736720C1 (en)
ES (1) ES2166618T3 (en)
WO (1) WO1999009232A1 (en)

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DE59802854D1 (en) 2002-02-28
ATE211778T1 (en) 2002-01-15
EP1015653B1 (en) 2002-01-09
DE19736720C1 (en) 1999-05-06
AU9431498A (en) 1999-03-08
JP2001515148A (en) 2001-09-18
ES2166618T3 (en) 2002-04-16
US6368549B1 (en) 2002-04-09

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