EP0867519A1 - Application of a steel for the outer layer of a casting roll - Google Patents

Application of a steel for the outer layer of a casting roll Download PDF

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Publication number
EP0867519A1
EP0867519A1 EP98103899A EP98103899A EP0867519A1 EP 0867519 A1 EP0867519 A1 EP 0867519A1 EP 98103899 A EP98103899 A EP 98103899A EP 98103899 A EP98103899 A EP 98103899A EP 0867519 A1 EP0867519 A1 EP 0867519A1
Authority
EP
European Patent Office
Prior art keywords
bis
steel
casting roll
application
outer layer
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.)
Withdrawn
Application number
EP98103899A
Other languages
German (de)
French (fr)
Inventor
Gerald Dipl.-Ing. Stein
Lothar Hentz
Heinz-Albert Dipl.-Ing. Weber
Hermann-Josef Skotz
Udo Dipl.-Ing. Riepe
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.)
VSG Energie and Schmiedetechnik GmbH
Original Assignee
VSG Energie and Schmiedetechnik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by VSG Energie and Schmiedetechnik GmbH filed Critical VSG Energie and Schmiedetechnik GmbH
Publication of EP0867519A1 publication Critical patent/EP0867519A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0648—Casting surfaces
    • B22D11/0651—Casting wheels
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • 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
    • 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
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use

Definitions

  • the invention relates to a steel for casting roll shells, especially for aluminum casting machines.
  • the production of semi-finished aluminum is increasing Used scrap that melted, poured and is hot rolled. Pouring the molten aluminum takes place in the gusset between two around parallel horizontal axes rotatably mounted cooled Casting rolls. During the contact of the aluminum melt the aluminum solidifies with the cooled casting rollers and is formed between the rotating casting rolls.
  • the casting rolls consist of an axis on which the Casting roll jacket is shrunk.
  • One of the demands there is less of a material for cast roll shells Coefficient of thermal expansion so that the seat of the jacket guaranteed on the axis even at higher temperatures is.
  • Another material requirement for Casting roll shells are high hardness, but also good Ductility at higher temperatures up to 750 ° C. Because of the thermal load arises on the Pour roller coats one more or after a long period of use less pronounced network break network. The goal is due to an optimal jacket quality the time for the inevitable occurrence of the cracks as long as possible to delay. There is a high resistance to hot cracks an essential requirement for cast roll jacket materials.
  • the steel can optionally be up to 0.1% Al and up to 1% W contain.
  • the one to be used according to the invention differs Steel in an additional niobium content of 0.15 to 0.30%.
  • Niobium forms with 0.1 to 0.3% nitrogen niobium nitride contained in the steel. This separate in finely divided form and cause a fine-grained structure as a prerequisite for a good one Ductility of the material to reduce the inclination to hot cracks.
  • Ni-alloyed steel grades have in addition to the required Adequate strength to minimize wear Ductility down to the working temperature range Casting rolls between 600 and 750 ° C shown.
  • Preferred area of application for casting roll shells from the Steel according to the invention are machines for continuous casting of semi-finished aluminum.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Abstract

The use of a steel of the following composition as a casting roll barrel material is new. The steel has the composition (by wt.) 0.1-0.4 (especially 0.10-0.20)% C, 0.1-0.8% Si, 0.2-0.7% Mn, 2.0-2.9 (especially 2.00-2.65)% Cr, 0.2-0.9 (especially 0.25-0.75)% Ni, 0.5-1.2 (especially 0.5-1.10)% Mo, 0.3-0.7% V, 0.15-0.3% Nb, 0.10-0.3% N and balance Fe.

Description

Die Erfindung betrifft einen Stahl für Gießwalzenmäntel, insbesondere für Aluminium-Gießmaschinen.The invention relates to a steel for casting roll shells, especially for aluminum casting machines.

Zur Herstellung von Aluminium-Halbzeug wird vermehrt Schrott eingesetzt, der geschmolzen, gegossen und warmgewalzt wird. Das Gießen der Aluminiumschmelze erfolgt in den Zwickel zwischen zwei um parallele waagerechte Achsen drehbar gelagerten gekühlten Gießwalzen. Während des Kontaktes der Aluminiumschmelze mit den gekühlten Gießwalzen erstarrt das Aluminium und wird zwischen den rotierenden Gießwalzen geformt.The production of semi-finished aluminum is increasing Used scrap that melted, poured and is hot rolled. Pouring the molten aluminum takes place in the gusset between two around parallel horizontal axes rotatably mounted cooled Casting rolls. During the contact of the aluminum melt the aluminum solidifies with the cooled casting rollers and is formed between the rotating casting rolls.

Die Gießwalzen bestehen aus einer Achse, auf die der Gießwalzenmantel aufgeschrumpft ist. Eine der Forderungen an den Werkstoff für Gießwalzenmäntel ist ein geringer Wärmeausdehnungskoeffizient, damit der Sitz des Mantels auf der Achse auch bei höheren Temperaturen gewährleistet ist. Eine andere Anforderung an den Werkstoff für Gießwalzenmäntel ist hohe Härte, aber auch gute Duktilität bei höheren Temperaturen bis 750 °C. Aufgrund der thermischen Belastung entsteht auf den Gießwalzenmänteln nach längerer Einsatzzeit ein mehr oder weniger ausgeprägtes Bandrißnetzwerk. Das Ziel ist es, durch eine optimale Mantelqualität den Zeitpunkt für das unvermeidliche Auftreten der Risse möglichst lange hinauszuzögern. Ein hoher Widerstand gegen Warmrisse ist also eine wesentliche Anforderung an Gießwalzenmantel-Werkstoffe. The casting rolls consist of an axis on which the Casting roll jacket is shrunk. One of the demands there is less of a material for cast roll shells Coefficient of thermal expansion so that the seat of the jacket guaranteed on the axis even at higher temperatures is. Another material requirement for Casting roll shells are high hardness, but also good Ductility at higher temperatures up to 750 ° C. Because of the thermal load arises on the Pour roller coats one more or after a long period of use less pronounced network break network. The goal is due to an optimal jacket quality the time for the inevitable occurrence of the cracks as long as possible to delay. There is a high resistance to hot cracks an essential requirement for cast roll jacket materials.

Für Gießwalzenmäntel hat man bisher die in der nachfolgenden Tabelle 1 in ihrer chemischen Zusammensetzung aufgeführten Stahlqualitäten eingesetzt. Stahl Legierungselemente in % C Mn Cr Ni Mo V P 911 0.53 0.47 2,05 0.50 1.03 0.35 P 912 0.53 0.50 1.13 0.48 0.48 0.15 P 914 0.16 0.96 1.40 0.20 0.90 0.26 P 915 0.32 0.30 2.95 0.20 2.80 0.20 P 917 0.30 0.55 2.55 0.50 1.10 0.60 P 918 0.18 0.50 5.00 0.15 1.10 0.90 So far, the steel grades listed in Table 1 below in chemical composition have been used for casting roll shells. stole Alloy elements in% C. Mn Cr Ni Mon V P 911 0.53 0.47 2.05 0.50 1.03 0.35 P 912 0.53 0.50 1.13 0.48 0.48 0.15 P 914 0.16 0.96 1.40 0.20 0.90 0.26 P 915 0.32 0.30 2.95 0.20 2.80 0.20 P 917 0.30 0.55 2.55 0.50 1.10 0.60 P 918 0.18 0.50 5.00 0.15 1.10 0.90

Es handelt sich um chrom-, nickel-, molybdän- und vanadiumlegierte Stähle mit Kohlenstoffgehalten von 0,16 % und mehr. Mit diesen Stählen konnte eine gute Anpassung aller geforderten Eigenschaften erreicht werden.It is chrome, nickel, molybdenum and vanadium alloyed steels with carbon contents of 0.16% and more. With these steels a good one could Adaptation of all required properties achieved will.

Um die Lebensdauer von Gießwalzenmänteln durch Verbesserung der mechanischen Verschleißbeständigkeit und Widerstand gegen Warmbandrisse zu verlängern, stellt sich die Aufgabe nach einer weiteren Verbesserung der herkömmlichen Gießwalzenmäntel-Werkstoffe.To extend the life of cast roll shells Improve mechanical wear resistance and Prolonging resistance to hot strip cracks arises the task of further improving the conventional casting roll shell materials.

Zur Lösung dieser Aufgabe wird erfindungsgemäß die Verwendung eines Stahls mit (in Masse-%)

  • 0,1 bis 0,4 % C
  • 0,1 bis 0,8 % Si
  • 0,2 bis 0,7 % Mn
  • 2,0 bis 2,9 % Cr
  • 0,2 bis 0,9 % Ni
  • 0,5 bis 1,2 % Mo
  • 0,3 bis 0,7 % V
  • 0,15 bis 0,3 % Nb
  • 0,10 bis 0,3 % N
  • Rest Fe,
    • einschließlich unvermeidbarer Verunreinigungen, als Werkstoff für Gießwalzenmäntel vorgeschlagen.To achieve this object, the use of a steel with (in mass%)
  • 0.1 to 0.4% C
  • 0.1 to 0.8% Si
  • 0.2 to 0.7% Mn
  • 2.0 to 2.9% Cr
  • 0.2 to 0.9% Ni
  • 0.5 to 1.2% Mo
  • 0.3 to 0.7% V
  • 0.15 to 0.3% Nb
  • 0.10 to 0.3% N
  • Rest Fe,
    • including inevitable impurities, proposed as a material for cast roll shells.

    Eine bevorzugte Legierungszusammensetzung ist dabei (in Masse-%):

  • 0,25 bis 0,36 % C
  • 0,10 bis 0,80 % Si
  • 0,20 bis 0,70 % Mn
  • 2,00 bis 2,65 % Cr
  • 0,25 bis 0,75 % Ni
  • 0,50 bis 1,10 % Mo
  • 0,30 bis 0,70 % V
  • 0,15 bis 0,30 % Nb
  • 0,10 bis 0,30 % N
  • Rest Fe einschl. unvermeidbarer Verunreinigungen
    • A preferred alloy composition is (in% by mass):
  • 0.25 to 0.36% C
  • 0.10 to 0.80% Si
  • 0.20 to 0.70% Mn
  • 2.00 to 2.65% Cr
  • 0.25 to 0.75% Ni
  • 0.50 to 1.10% Mo
  • 0.30 to 0.70% V
  • 0.15 to 0.30% Nb
  • 0.10 to 0.30% N
  • Balance Fe including unavoidable impurities

    • Eine weitere bevorzugte Werkstoffzusammensetzung ist wie folgt (in Masse-%):

  • 0,10 bis 0,20 % C
  • 0,10 bis 0,80 % Si
  • 0,20 bis 0,70 % Mn
  • 2,00 bis 2,65 % Cr
  • 0,25 bis 0,75 % Ni
  • 0,50 bis 1,10 % Mo
  • 0,30 bis 0,70 % V
  • 0,15 bis 0,30 % Nb
  • 0,10 bis 0,30 % N
  • Rest Fe einschl. unvermeidbarer Verunreinigungen
    • Another preferred material composition is as follows (in% by mass):
  • 0.10 to 0.20% C
  • 0.10 to 0.80% Si
  • 0.20 to 0.70% Mn
  • 2.00 to 2.65% Cr
  • 0.25 to 0.75% Ni
  • 0.50 to 1.10% Mo
  • 0.30 to 0.70% V
  • 0.15 to 0.30% Nb
  • 0.10 to 0.30% N
  • Balance Fe including unavoidable impurities

    • Wahlweise kann der Stahl bis 0,1 % Al und bis 1 % W enthalten.The steel can optionally be up to 0.1% Al and up to 1% W contain.

    Von den bisher verwendeten Gießwalzenmantel-Werkstoffen unterscheidet sich der erfindungsgemäß zu verwendende Stahl in einem zusätzlichen Gehalt an Niob von 0,15 bis 0,30 %. Niob bildet mit dem in einer Menge von 0,1 bis 0,3 % im Stahl enthaltenen Stickstoff Niobnitride. Diese scheiden sich in fein verteilter Form aus und bewirken ein feinkörniges Gefüge als Voraussetzung für eine gute Duktilität des Werkstoffes zur Verminderung der Neigung zu Warmrissen.Of the casting roll shell materials previously used the one to be used according to the invention differs Steel in an additional niobium content of 0.15 to 0.30%. Niobium forms with 0.1 to 0.3% nitrogen niobium nitride contained in the steel. This separate in finely divided form and cause a fine-grained structure as a prerequisite for a good one Ductility of the material to reduce the inclination to hot cracks.

    Versuche mit den erfindungsgemäß zu verwendenden nioblegierten Stahlqualitäten haben neben der geforderten Festigkeit zur Verschleißminimierung eine ausreichende Duktilität bis in den Bereich der Arbeitstemperatur der Gießwalzen zwischen 600 und 750 °C gezeigt.Experiments with those to be used according to the invention Ni-alloyed steel grades have in addition to the required Adequate strength to minimize wear Ductility down to the working temperature range Casting rolls between 600 and 750 ° C shown.

    Bevorzugtes Einsatzgebiet für Gießwalzenmäntel aus dem erfindungsgemäßen Stahl sind Maschinen zum Stranggießen von Aluminium-Halbzeug.Preferred area of application for casting roll shells from the Steel according to the invention are machines for continuous casting of semi-finished aluminum.

    Claims (3)

    Verwendung eines Stahls mit (in Masse-%) 0,1 bis 0,4 % C 0,1 bis 0,8 % Si 0,2 bis 0,7 % Mn 2,0 bis 2,9 % Cr 0,2 bis 0,9 % Ni 0,5 bis 1,2 % Mo 0,3 bis 0,7 % V 0,15 bis 0,3 % Nb 0,10 bis 0,3 % N Rest Fe, einschließlich unvermeidbarer Verunreinigungen, als Werkstoff für Gießwalzenmäntel.Use of a steel with (in mass%) 0.1 to 0.4% C 0.1 to 0.8% Si 0.2 to 0.7% Mn 2.0 to 2.9% Cr 0.2 to 0.9% Ni 0.5 to 1.2% Mo 0.3 to 0.7% V 0.15 to 0.3% Nb 0.10 to 0.3% N Rest Fe, including unavoidable impurities, as a material for cast roll shells. Verwendung eines Stahls der Zusammensetzung nach Anspruch 1, jedoch mit (in Masse-%): 0,25 bis 0,36 % C 0,10 bis 0,80 % Si 0,20 bis 0,70 % Mn 2,00 bis 2,65 % Cr 0,25 bis 0,75 % Ni 0,50 bis 1,10 % Mo 0,30 bis 0,70 % V 0,15 bis 0,30 % Nb 0,10 bis 0,30 % N Rest Fe einschließlich unvermeidbarer Verunreinigungen für den Zweck nach Anspruch 1. Use of a steel of the composition according to claim 1, but with (in mass%): 0.25 to 0.36% C 0.10 to 0.80% Si 0.20 to 0.70% Mn 2.00 to 2.65% Cr 0.25 to 0.75% Ni 0.50 to 1.10% Mo 0.30 to 0.70% V 0.15 to 0.30% Nb 0.10 to 0.30% N Rest of Fe including unavoidable impurities for the purpose of claim 1. Verwendung eines Stahls der Zusammensetzung nach Anspruch 1, jedoch mit (in Masse-%): 0,10 bis 0,20 % C 0,10 bis 0,80 % Si 0,20 bis 0,70 % Mn 2,00 bis 2,65 % Cr 0,25 bis 0,75 % Ni 0,50 bis 1,10 % Mo 0,30 bis 0,70 % V 0,15 bis 0,30 % Nb 0,10 bis 0,30 % N Rest Fe für den Zweck nach Anspruch 1.Use of a steel of the composition according to claim 1, but with (in mass%): 0.10 to 0.20% C 0.10 to 0.80% Si 0.20 to 0.70% Mn 2.00 to 2.65% Cr 0.25 to 0.75% Ni 0.50 to 1.10% Mo 0.30 to 0.70% V 0.15 to 0.30% Nb 0.10 to 0.30% N Rest of Fe for the purpose of claim 1.
    EP98103899A 1997-03-28 1998-03-05 Application of a steel for the outer layer of a casting roll Withdrawn EP0867519A1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE1997113208 DE19713208A1 (en) 1997-03-28 1997-03-28 Use of steel for casting roll jackets
    DE19713208 1997-03-28

    Publications (1)

    Publication Number Publication Date
    EP0867519A1 true EP0867519A1 (en) 1998-09-30

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    ID=7824992

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98103899A Withdrawn EP0867519A1 (en) 1997-03-28 1998-03-05 Application of a steel for the outer layer of a casting roll

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    DE (1) DE19713208A1 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN104928594A (en) * 2015-05-29 2015-09-23 中钢集团邢台机械轧辊有限公司 Aluminum cast roller sleeve with thermal fatigue resistance performance and manufacturing method of roller sleeve

    Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JPS5018339A (en) * 1973-06-22 1975-02-26
    JPS55125261A (en) * 1979-03-22 1980-09-26 Mitsubishi Heavy Ind Ltd Alloy with superior thermal impact resistance and superior high temperature wear and corrosion resistnaces
    US4420335A (en) * 1981-02-05 1983-12-13 Hitachi Shipbuilding & Engineering Company Limited Materials for rolls
    US5407635A (en) * 1992-03-12 1995-04-18 Sumitomo Metal Industries, Ltd. Low-chromium ferritic heat-resistant steel with improved toughness and creep strength

    Family Cites Families (3)

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    Publication number Priority date Publication date Assignee Title
    DE898316C (en) * 1938-12-07 1953-11-30 Boehler & Co Ag Geb Hot work tools
    AT162908B (en) * 1946-11-04 1949-04-25 Boehler & Co Ag Geb Steel alloys for hot work tools
    US4673433A (en) * 1986-05-28 1987-06-16 Uddeholm Tooling Aktiebolag Low-alloy steel material, die blocks and other heavy forgings made thereof and a method to manufacture the material

    Patent Citations (4)

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    Publication number Priority date Publication date Assignee Title
    JPS5018339A (en) * 1973-06-22 1975-02-26
    JPS55125261A (en) * 1979-03-22 1980-09-26 Mitsubishi Heavy Ind Ltd Alloy with superior thermal impact resistance and superior high temperature wear and corrosion resistnaces
    US4420335A (en) * 1981-02-05 1983-12-13 Hitachi Shipbuilding & Engineering Company Limited Materials for rolls
    US5407635A (en) * 1992-03-12 1995-04-18 Sumitomo Metal Industries, Ltd. Low-chromium ferritic heat-resistant steel with improved toughness and creep strength

    Non-Patent Citations (2)

    * Cited by examiner, † Cited by third party
    Title
    DATABASE WPI Section Ch Week 7629, Derwent World Patents Index; Class M22, AN 76-54781X, XP002072219 *
    PATENT ABSTRACTS OF JAPAN vol. 004, no. 186 (C - 036) 20 December 1980 (1980-12-20) *

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN104928594A (en) * 2015-05-29 2015-09-23 中钢集团邢台机械轧辊有限公司 Aluminum cast roller sleeve with thermal fatigue resistance performance and manufacturing method of roller sleeve

    Also Published As

    Publication number Publication date
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