EP0123961A2 - Abrasion-resistant composite article and process for its manufacture - Google Patents

Abrasion-resistant composite article and process for its manufacture Download PDF

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Publication number
EP0123961A2
EP0123961A2 EP84103772A EP84103772A EP0123961A2 EP 0123961 A2 EP0123961 A2 EP 0123961A2 EP 84103772 A EP84103772 A EP 84103772A EP 84103772 A EP84103772 A EP 84103772A EP 0123961 A2 EP0123961 A2 EP 0123961A2
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European Patent Office
Prior art keywords
weight
hard
composite body
metal particles
hard metal
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EP84103772A
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German (de)
French (fr)
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EP0123961A3 (en
EP0123961B1 (en
Inventor
Josef Blum
Johannes Jachowski
Helmut Klasing
Paul Pant
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Fried Krupp AG
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Fried Krupp AG
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Priority to AT84103772T priority Critical patent/ATE33042T1/en
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/02Making ferrous alloys by powder metallurgy
    • C22C33/0257Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0278Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
    • C22C33/0292Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with more than 5% preformed carbides, nitrides or borides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00Casting in, on, or around objects which form part of the product
    • B22D19/14Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/10Alloys containing non-metals
    • C22C1/1036Alloys containing non-metals starting from a melt
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/29Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982Particulate matter [e.g., sphere, flake, etc.]

Definitions

  • the invention relates to a wear-resistant composite body which consists of a metallic base material and has a wear-resistant zone which contains hard material and / or hard metal particles in addition to the base material.
  • the invention further relates to a method for producing this wear-resistant composite body.
  • the composite bodies of the type mentioned at the outset include wear parts which are armored with weld-on alloys.
  • the weld-on alloys consist of hard material or hard metal particles, which are surrounded by a welding electrode jacket.
  • the electrode jacket forms a metal matrix in which the hard material and hard metal particles are embedded.
  • the metallic base and the electrode jacket can consist of the same alloy.
  • the welded-on material forms the wear-resistant zone of the wearing part.
  • the use of weld-on alloys is limited by the fact that only thin layers adhere firmly enough to the metal base and that the thin layers are destroyed relatively quickly.
  • DE-PS 2 919 477 discloses a wear-resistant composite body of the type mentioned at the outset, in which the base material consists of 1 to 4% by weight. Carbon, 0.3 to 0.6% by weight of silicon, 0.5 to 1.5% by weight of manganese, 0.8 to 2.8% by weight of vanadium, 0.5 to 1.5% by weight. -% chromium, 2 to 10 wt .-% tungsten, 0.01 wt .-% aluminum and the rest iron and in which the initial weight of hard material or hard metal to the base material has a ratio of 1: 5, the grain size of the hard material - And / or hard metal particles is 0.5 to 5 mm.
  • This composite body is produced by adding hard metal and / or hard material grains of 0.5 to 5 mm in size with simultaneous cooling of the melt onto a liquid metal alloy cast into a mold, the hard metal and hard material grains being in the melt sink.
  • the composite body known from DE-PS 2 919 477 has the disadvantage that its base material can only be machined with difficulty and that its hard and / or hard metal-free area can therefore practically not be produced from the base material. Rather, the composite body known from DE-PS 2 919 477 is soldered or welded onto a metallic base when it is to be processed into a wear-resistant workpiece or machine part. It has also proven to be disadvantageous that the alloy from which the base material of the composite body according to DE-PS 2 919 477 is made, is difficult to weld.
  • the invention has for its object to provide a composite body of the type mentioned, the hard metal or hard material-free metallic area can be machined well and welded in order to connect the composite body with other metal parts quickly and safely.
  • a base material had to be found which can be machined and welded and which melts so low that it is suitable as a metal matrix for the storage of hard material and / or hard metal particles.
  • the invention is also based on the object of providing a method for producing the composite body.
  • the object on which the invention is based is achieved in that the base material consists of 0.001 to 1.5% by weight of carbon, 0.5 to 8% by weight of boron, 1 to 8% by weight of niobium, 0.2 to 6% by weight % Chromium, O to 30% by weight nickel, O to 10% by weight manganese, O to 6% by weight vanadium, O to 5% by weight molybdenum, O to 5% by weight silicon and
  • the rest of the iron is composed that the hard material and hard metal particles have a diameter of 0.1 to 20 mm and that the proportion of hard material and hard metal particles in the wear-resistant zone is between 25 and 95% by volume.
  • an alloy with the above-mentioned composition has a low melting range, which is below 1400 ° C., and that this alloy can surprisingly be machined well and is easy to weld, and it firmly stores hard material and hard metal particles.
  • the base material therefore makes it possible to produce composite bodies with large dimensions, which have both a weldable and machinable metallic, hard and hard metal-free area and a wear-resistant, hard and hard metal-containing wear-resistant zone and in which the wear-resistant zone is full is integrated.
  • the composite body according to the invention has particularly advantageous properties and is particularly easy to weld if the base material consists of 0.05 to 0.5% by weight of carbon, 0.5 to 2% by weight of boron, 2 to 4% by weight of niobium, 2 to 4 wt% chromium, 10 to 20 wt% nickel, 4 to 8 wt% manganese, 1 to 3 wt% vanadium, 0 to 2 wt% molybdenum, 1 to 3 wt. -% silicon and the rest iron is composed.
  • the hard material particles consist of WC and / or W 2 C and that the hard metal particles consist of broken hard metal scrap.
  • Hard materials in the sense of the invention are hard carbides, nitrides, borides, oxides and silicides.
  • Hard metals in the sense of the invention are alloys which are composed of one or more hard materials, in particular carbides, and a binding metal which consists of iron, cobalt and / or nickel.
  • Hard metal scrap is a waste product from manufacturers and users of hard metal products and can be reused particularly advantageously according to the invention.
  • the proportion of the wear-resistant zone in the composite body is between 2 and 50% by volume.
  • the object on which the invention is based is further achieved by the creation of a method for producing the composite body, in which a metal melt consisting of 0.001 to 1.5% by weight of carbon, 0.5 to 8% by weight of boron, 1 to 8 wt .-% of niobium, 0.2 to 6 wt .-% of chromium, 0 to 30 wt .-% nickel, 10 wt .-% O to manganese, O to 6 wt -.% vanadium, O to 5 percent.
  • a metal melt consisting of 0.001 to 1.5% by weight of carbon, 0.5 to 8% by weight of boron, 1 to 8 wt .-% of niobium, 0.2 to 6 wt .-% of chromium, 0 to 30 wt .-% nickel, 10 wt .-% O to manganese, O to 6 wt -.% vanadium, O to 5 percent.
  • % Molybdenum 0 to 5% by weight silicon and remainder iron, is poured into a ceramic mold and in the hard metal and / or hard metal particles, which have a diameter of 0.1 to 20 mm, then into the liquid metal melt, be introduced in such an amount that their proportion in the wear-resistant zone is between 25 and 95% by volume.
  • This method has the advantage that the metallic area and the wear-resistant zone form one body.
  • the hard material and hard metal particles are firmly embedded in the metal matrix, which is achieved in that the hard material and hard metal particles are dissolved on their surface as they sink in the melt and are therefore very firmly embedded in the metal matrix of the wear-resistant zone which is on the Forms base of the mold.
  • Hard material and hard metal particles, which have an irregular geometric shape, are particularly firmly embedded in the metal matrix.
  • the process according to the invention can be carried out particularly economically if the mold consists of bound molding sand.
  • the hard material and / or hard metal particles are either scattered evenly onto the surface of the molten metal or that the hard material and / or hard metal particles embedded in a residue-free evaporating plastic carrier are introduced into the mold prior to casting will.
  • the hard material and hard metal particles sink downward in the liquid metal melt and form the wear-resistant zone of the composite body there.
  • the sinking of the hard material and / or hard metal particles in the molten metal can be influenced in an advantageous manner in that the shape vibrates during the introduction of these particles, that is to say is set in a vibration movement by a corresponding device.
  • the composite body is used for the production of tools for removing and / or crushing coal, rocks, minerals, soil, glass and waste, since such tools are subject to particularly great wear and tear, have different geometric shapes and sizes as well as releasably or permanently connected to the corresponding machine tools.
  • the composite body according to the invention can be processed by the method for its production into a weldable excavator tooth, a rock drill, a beater for hammer mills to be fastened by screwing, or an impact plate for impact mills.
  • the racket designed in accordance with the invention has proven itself very well in practical use in the crushing of sand-lime brick.

Abstract

A wear resistant compound body is disclosed which is comprised of a metallic basic material and has a wear resistant zone which includes hard substance and/or hard metal particles in addition to the basic material. The basic material is composed of 0.001 to 1.5 weight percent carbon, 0.5 to 8 weight percent boron, 1 to 8 weight percent niobium, 0.2 to 6 weight percent chromium, 0 to 30 weight percent nickel, 0 to 10 weight percent manganese, 0 to 6 weight percent vanadium, 0 to 5 weight percent molybdenum, 0 to 5 weight percent silicon, the remainder being iron. Also disclosed is a casting process for producing the compound body.

Description

Die Erfindung betrifft einen verschleißbeständigen Verbundkörper, der aus einem metallischen Basiswerkstoff besteht und eine verschleißbeständige Zone aufweist, die neben dem Basiswerkstoff Hartstoff-und/oder Hartmetallteilchen enthält. Die Erfindung betrifft ferner ein Verfahren zur Herstellung dieses verschleißbeständigen Verbundkörpers.The invention relates to a wear-resistant composite body which consists of a metallic base material and has a wear-resistant zone which contains hard material and / or hard metal particles in addition to the base material. The invention further relates to a method for producing this wear-resistant composite body.

Zu den Verbundkörpern der eingangs genannten Art gehören Verschleißteile, die mit Aufschweißlegierungen gepanzert sind. Die Aufschweißlegierungen bestehen aus Hartstoff- oder Hartmetallteilchen, die von einem Schweißelektrodenmantel umgeben sind. Beim Aufschweißen auf eine metallische Unterlage bildet der Elektrodenmantel eine Metallmatrix, in welche die Hartstoff-und Hartmetallteilchen eingelagert werden. Die metallische Unterlage und der Elektrodenmantel können aus der gleichen Legierung bestehen. Das aufgeschweißte Material bildet die verschleißbeständige Zone des Verschleißteils. Der Einsatz von Aufschweißlegierungen ist aber dadurch begrenzt, daß nur dünne Schichten fest genug auf der Metallunterlage haften und daß die dünnen Schichten verhältnismäßig schnell zerstört werden.The composite bodies of the type mentioned at the outset include wear parts which are armored with weld-on alloys. The weld-on alloys consist of hard material or hard metal particles, which are surrounded by a welding electrode jacket. When welding onto a metallic base, the electrode jacket forms a metal matrix in which the hard material and hard metal particles are embedded. The metallic base and the electrode jacket can consist of the same alloy. The welded-on material forms the wear-resistant zone of the wearing part. The use of weld-on alloys is limited by the fact that only thin layers adhere firmly enough to the metal base and that the thin layers are destroyed relatively quickly.

Ferner ist aus der DE-PS 2 919 477 ein verschleißfester Verbundkörper der eingangs genannten Art bekannt, bei dem der Basiswerkstoff aus 1 bis 4 Gew.-% Kohlenstoff, 0,3 bis O,6 Gew.-% Silicium, 0,5 bis 1,5 Gew.―% Mangan, 0,8 bis 2,8 Gew.-% Vanadin, 0,5 bis 1,5 Gew.-% Chrom, 2 bis 10 Gew.-% Wolfram, 0,01 Gew.-% Aluminium und Rest Eisen besteht und bei dem die Ausgangseinwaage an Hartstoff bzw. Hartmetall zum Basiswerkstoff ein Verhältnis von 1:5 aufweist, wobei die Körnung der Hartstoff- und/oder Hartmetallteilchen 0,5 bis 5 mm beträgt. Dieser Verbundkörper wird dadurch hergestellt, daß auf eine nach dem Erschmelzen in eine Form gegossene, flüssige Metalllegierung Hartmetall- und/oder Hartstoffkörner von 0,5 bis 5 mm Größe unter gleichzeitiger Abkühlung der Schmelze gegeben werden, wobei die Hartmetall-und Hartstoffkörner in der Schmelze absinken. Der aus der DE-PS 2 919 477 bekannte Verbundkörper hat den Nachteil, daß sein Basiswerkstoff nur schwer spanend bearbeitet werden kann und daß daher sein hartstoff- und/oder hartmetallfreier Bereich praktisch nicht aus dem Basiswerkstoff zu fertigen ist. Vielmehr wird der aus der DE-PS 2 919 477 bekannte Verbundkörper auf eine metallische Unterlage aufgelötet oder aufgeschweißt, wenn er zu einem verschleißbeständigen Werkstück bzw. Maschinenteil verarbeitet werden soll. Dabei hat es sich zusätzlich als nachteilig erwiesen, daß die Legierung, aus der der Basiswerkstoff des Verbundkörpers nach der DE-PS 2 919 477 besteht, nur schwer schweißbar ist.Furthermore, DE-PS 2 919 477 discloses a wear-resistant composite body of the type mentioned at the outset, in which the base material consists of 1 to 4% by weight. Carbon, 0.3 to 0.6% by weight of silicon, 0.5 to 1.5% by weight of manganese, 0.8 to 2.8% by weight of vanadium, 0.5 to 1.5% by weight. -% chromium, 2 to 10 wt .-% tungsten, 0.01 wt .-% aluminum and the rest iron and in which the initial weight of hard material or hard metal to the base material has a ratio of 1: 5, the grain size of the hard material - And / or hard metal particles is 0.5 to 5 mm. This composite body is produced by adding hard metal and / or hard material grains of 0.5 to 5 mm in size with simultaneous cooling of the melt onto a liquid metal alloy cast into a mold, the hard metal and hard material grains being in the melt sink. The composite body known from DE-PS 2 919 477 has the disadvantage that its base material can only be machined with difficulty and that its hard and / or hard metal-free area can therefore practically not be produced from the base material. Rather, the composite body known from DE-PS 2 919 477 is soldered or welded onto a metallic base when it is to be processed into a wear-resistant workpiece or machine part. It has also proven to be disadvantageous that the alloy from which the base material of the composite body according to DE-PS 2 919 477 is made, is difficult to weld.

Der Erfindung liegt die Aufgabe zugrunde, einen Verbundkörper der eingangs genannten Art zu schaffen, dessen hartmetall- bzw. hartstofffreier metallischer Bereich gut spanend bearbeitet werden kann und gut schweißbar ist, um den Verbundkörper mit anderen Metallteilen schnell und sicher verbinden zu können. Dies bedeutet, daß ein Basiswerkstoff gefunden werden mußte, der spanend bearbeitet sowie geschweißt werden kann und der so niedrig schmilzt, daß er als Metallmatrix zur Einlagerung von Hartstoff- und/oder Hartmetallteilchen geeignet ist. Der Erfindung liegt ferner die Aufgabe zugrunde, ein Verfahren zur Herstellung des Verbundkörpers zu schaffen.The invention has for its object to provide a composite body of the type mentioned, the hard metal or hard material-free metallic area can be machined well and welded in order to connect the composite body with other metal parts quickly and safely. This means that a base material had to be found which can be machined and welded and which melts so low that it is suitable as a metal matrix for the storage of hard material and / or hard metal particles. The invention is also based on the object of providing a method for producing the composite body.

Die der Erfindung zugrundeliegende Aufgabe wird dadurch gelöst, daß der Basiswerkstoff aus 0,001 bis 1,5 Gew.-% Kohlenstoff, 0,5 bis 8 Gew.-% Bor, 1 bis 8 Gew.-% Niob, 0,2 bis 6 Gew.-% Chrom, O bis 30 Gew.-% Nickel, O bis 10 Gew.-% Mangan, O bis 6 Gew.-% Vanadin, O bis 5 Gew.-% Molybdän, O bis 5 Gew.-% Silicium sowie Rest Eisen zusammengesetzt ist, daß die Hartstoff- und Hartmetallteilchen einen Durchmesser von 0,1 bis 20 mm aufweisen und daß der Anteil der Hartstoff- und Hartmetallteilchen in der verschleißbeständigen Zone zwischen 25 und 95 Vol.-% liegt. Es hat sich gezeigt, daß eine Legierung mit der vorstehend genannten Zusammensetzung einen niedrigen Schmelzbereich besitzt, der unterhalb 1400 0C liegt, und daß diese Legierung überraschenderweise gut spanend bearbeitet werden kann und gut schweißbar ist sowie Hartstoff-und Hartnetallteilchen fest einlagert. Der Basiswerkstoff ermöglicht es daher, daß Verbundkörper mit großen Abmessungen hergestellt werden können, die sowohl einen gut schweißbaren sowie gut spanend bearbeitbaren metallischen, hartstoff- sowie hartmetallfreien Bereich als auch eine verschleißbeständige, hartstoff-sowie hartmetallhaltige verschleißbeständige Zone besitzen und in denen die verschleißbeständige Zone voll integriert ist.The object on which the invention is based is achieved in that the base material consists of 0.001 to 1.5% by weight of carbon, 0.5 to 8% by weight of boron, 1 to 8% by weight of niobium, 0.2 to 6% by weight % Chromium, O to 30% by weight nickel, O to 10% by weight manganese, O to 6% by weight vanadium, O to 5% by weight molybdenum, O to 5% by weight silicon and The rest of the iron is composed that the hard material and hard metal particles have a diameter of 0.1 to 20 mm and that the proportion of hard material and hard metal particles in the wear-resistant zone is between 25 and 95% by volume. It has been shown that an alloy with the above-mentioned composition has a low melting range, which is below 1400 ° C., and that this alloy can surprisingly be machined well and is easy to weld, and it firmly stores hard material and hard metal particles. The base material therefore makes it possible to produce composite bodies with large dimensions, which have both a weldable and machinable metallic, hard and hard metal-free area and a wear-resistant, hard and hard metal-containing wear-resistant zone and in which the wear-resistant zone is full is integrated.

Der erfindungsgemäße Verbundkörper hat besonders vorteilhafte Eigenschaften und ist insbesondere gut schweißbar, wenn der Basiswerkstoff aus 0,05 bis 0,5 Gew.-% Kohlenstoff, 0,5 bis 2 Gew.-% Bor, 2 bis 4 Gew.-% Niob, 2 bis 4 Gew.-% Chrom, 10 bis 20 Gew.-% Nickel, 4 bis 8 Gew.-% Mangan, 1 bis 3 Gew.-% Vanadin, 0 bis 2 Gew.-% Molybdän, 1 bis 3 Gew.-% Silicium sowie Rest Eisen zusammengesetzt ist.The composite body according to the invention has particularly advantageous properties and is particularly easy to weld if the base material consists of 0.05 to 0.5% by weight of carbon, 0.5 to 2% by weight of boron, 2 to 4% by weight of niobium, 2 to 4 wt% chromium, 10 to 20 wt% nickel, 4 to 8 wt% manganese, 1 to 3 wt% vanadium, 0 to 2 wt% molybdenum, 1 to 3 wt. -% silicon and the rest iron is composed.

Nach der Erfindung ist vorgesehen, daß die Hartstoffteilchen aus WC und/oder W2C und daß die Hartmetallteilchen aus gebrochenem Hartmetallschrott bestehen. Hartstoffe im Sinne der Erfindung sind harte Carbide, Nitride, Boride, Oxide und Silicide. Hartmetalle im Sinne der Erfindung sind Legierungen, die aus einem oder mehreren Hartstoffen insbesondere Carbiden, und einem Bindemetall, das aus Eisen, Cobalt und/oder Nickel besteht, zusammengesetzt sind. Hartmetallschrott fällt als Abfallprodukt bei den Herstellern und Anwendern von Hartmetallerzeugnissen an und kann nach der Erfindung besonders vorteilhaft wiederverwendet werden.According to the invention it is provided that the hard material particles consist of WC and / or W 2 C and that the hard metal particles consist of broken hard metal scrap. Hard materials in the sense of the invention are hard carbides, nitrides, borides, oxides and silicides. Hard metals in the sense of the invention are alloys which are composed of one or more hard materials, in particular carbides, and a binding metal which consists of iron, cobalt and / or nickel. Hard metal scrap is a waste product from manufacturers and users of hard metal products and can be reused particularly advantageously according to the invention.

Nach der Erfindung ist vorgesehen, daß der Anteil der verschleißbeständigen Zone im Verbundkörper zwischen 2 und 50 Vol.-% liegt. Insbesondere bei größeren Verschleißteilen ist es vorteilhaft, daß nur ein verhältnismäßig geringer Teil des Verbundkörpers als verschleißbeständige Zone ausgebildet werden kann und daß der restliche Teil als hartstoff- und hartmetallfreier metallischer Bereich zur Verfügung steht, der gut spanend bearbeitet und geschweißt werden kann.According to the invention it is provided that the proportion of the wear-resistant zone in the composite body is between 2 and 50% by volume. In the case of larger wear parts in particular, it is advantageous that only a relatively small part of the composite body can be formed as a wear-resistant zone and that the remaining part is available as a hard area and hard metal-free metallic area which can be machined and welded well.

Die der Erfindung .zugrundeliegende Aufgabe wird ferner durch die Schaffung eines Verfahrens zur Herstellung des Verbundkörpers gelöst, bei dem eine Metallschmelze, die aus 0,001 bis 1,5 Gew.-% Kohlenstoff, 0,5 bis 8 Gew.-% Bor, 1 bis 8 Gew.-% Niob, 0,2 bis 6 Gew.-% Chrom, 0 bis 30 Gew.-% Nickel, O bis 10 Gew.-% Mangan, O bis 6 Gew.-% Vanadin, O bis 5 Gew.-% Molybdän, 0 bis 5 Gew.-% Silicium sowie Rest Eisen besteht, in eine keramische Form gegossen wird und bei dem danach in die flüssige Metallschmelze Hartstoff- und/oder Hartmetallteilchen, die einen Durchmesser von 0,1 bis 20 mm haben, in einer solchen Menge eingebracht werden, daß ihr Anteil in der verschleißbeständigen Zone zwischen 25 und 95 Vol.-% liegt. Dieses Verfahren hat den Vorteil, daß der metallische Bereich und die verschleißbeständige Zone einen Körper bilden. Außerdem sind die Hartstoff- und Hartmetallteilchen in der Metallmatrix fest eingelagert, was dadurch erreicht wird, daß die Hartstoff- und Hartmetallteilchen beim Absinken in der Schmelze an ihrer Oberfläche angelöst werden und daher sehr fest in der Metallmatrix der verschleißbeständigen Zone eingebettet sind, die sich am Grund der Gußform ausbildet. Hartstoff- und Hartmetallteilchen, die eine unregelmäßige geometrische Form haben, werden besonders fest in der Metallmatrix eingelagert. Das erfindungsgemäße Verfahren kann besonders wirtschaftlich durchgeführt werden, wenn die Form aus gebundenem Formsand besteht.The object on which the invention is based is further achieved by the creation of a method for producing the composite body, in which a metal melt consisting of 0.001 to 1.5% by weight of carbon, 0.5 to 8% by weight of boron, 1 to 8 wt .-% of niobium, 0.2 to 6 wt .-% of chromium, 0 to 30 wt .-% nickel, 10 wt .-% O to manganese, O to 6 wt -.% vanadium, O to 5 percent. % Molybdenum, 0 to 5% by weight silicon and remainder iron, is poured into a ceramic mold and in the hard metal and / or hard metal particles, which have a diameter of 0.1 to 20 mm, then into the liquid metal melt, be introduced in such an amount that their proportion in the wear-resistant zone is between 25 and 95% by volume. This method has the advantage that the metallic area and the wear-resistant zone form one body. In addition, the hard material and hard metal particles are firmly embedded in the metal matrix, which is achieved in that the hard material and hard metal particles are dissolved on their surface as they sink in the melt and are therefore very firmly embedded in the metal matrix of the wear-resistant zone which is on the Forms base of the mold. Hard material and hard metal particles, which have an irregular geometric shape, are particularly firmly embedded in the metal matrix. The process according to the invention can be carried out particularly economically if the mold consists of bound molding sand.

Nach der Erfindung ist vorgesehen, daß die Hartstoff-und/oder Hartmetallteilchen entweder gleichmäßig auf die Oberfläche der Metallschmelze gestreut werden oder daß die in einen rückstandsfrei verdampfenden Kunststoffträger eingebetteten Hartstoff- und/oder Hartmetallteilchen vor dem Abguß in die Form eingebracht werden. Nach beiden Verfahrensvarianten sinken die Hartstoff- und Hartmetallteilchen in der flüssigen Metallschmelze nach unten und bilden dort die verschleißbeständige Zone des Verbundkörpers. Das Absinken der Hartstoff- und/oder Hartmetallteilchen in der Metallschmelze kann dadurch vorteilhaft beeinflußt werden, daß die Form während des Einbringens dieser Teilchen vibriert, also durch eine entsprechende Vorrichtung in eine Vibrationsbewegung versetzt wird.According to the invention it is provided that the hard material and / or hard metal particles are either scattered evenly onto the surface of the molten metal or that the hard material and / or hard metal particles embedded in a residue-free evaporating plastic carrier are introduced into the mold prior to casting will. According to both process variants, the hard material and hard metal particles sink downward in the liquid metal melt and form the wear-resistant zone of the composite body there. The sinking of the hard material and / or hard metal particles in the molten metal can be influenced in an advantageous manner in that the shape vibrates during the introduction of these particles, that is to say is set in a vibration movement by a corresponding device.

Schließlich ist nach der Erfindung vorgesehen, daß der Verbundkörper zur Herstellung von Werkzeugen zum Abtragen und/oder Zerkleinern von Kohle, Gesteinen, Mineralien, Erdreich, Glas und Müll verwendet wird, da derartige Werkzeuge einem besonders großen Verschleiß unterliegen, unterschiedliche geometrische Formen und Größen aufweisen sowie lösbar oder fest mit den entsprechenden Werkzeugmaschinen verbunden werden müssen. Beispielsweise kann der erfindungsgemäße Verbundkörper durch das Verfahren zu seiner Herstellung zu einem aufschweißbaren Baggerzahn, einem Gesteinsbohrer, einem durch Verschraubung zu befestigenden Schläger für Hammermühlen oder einer Prallplatte für Prallmühlen verarbeitet werden.Finally, it is provided according to the invention that the composite body is used for the production of tools for removing and / or crushing coal, rocks, minerals, soil, glass and waste, since such tools are subject to particularly great wear and tear, have different geometric shapes and sizes as well as releasably or permanently connected to the corresponding machine tools. For example, the composite body according to the invention can be processed by the method for its production into a weldable excavator tooth, a rock drill, a beater for hammer mills to be fastened by screwing, or an impact plate for impact mills.

Der Gegenstand der Erfindung wird nachfolgend anhand eines Ausführungsbeispiels und der Zeichnung näher erläutert.The subject matter of the invention is explained in more detail below using an exemplary embodiment and the drawing.

Zur Herstellung eines Schlägers, der in eine Hammermühle eingebaut und dort durch Verschraubung befestigt werden soll und dessen Abmessungen 160 x 200 x 500 mm betragen, wird eine Legierung, die aus 0,2 Gew.-% Kohlenstoff, 1,5 Gew.-% Silicium, 5 Gew.-% Mangan, 2 Gew.-% Chrom, 15 Gew.-% Nickel, 3 Gew.-% Niob, 1 Gew.-% Bor,. 1 Gew.―% Vanadin und Rest Eisen besteht, in eine keramische Form aus gebundenem Formsand abgegossen. In die Form wurde vor dem Abguß ein Kunststoffträger eingebracht, in den unregelmäßig geformte Hartmetallteilchen mit einem Durchmesser von 0,5 bis 2 mm eingebettet sind. Der Kunststoffträger verdampft beim Abguß rückstandsfrei, und die Hartmetallteilchen sinken in der Metallschmelze ab und bilden im unteren Teil des gegossenen Verbundkörpers die verschleißbeständige Zone, die ca. 10 Vol.-% des Schlägers einnimmt und einen Hartmetallgehalt von ca. 80 Vol.-% hat. Die Zeichnung zeigt den Querschnitt des Schlägers, der aus dem hartmetallfreien metallischen Bereich 1 und der hartmetallhaltigen verschleißbeständigen Zone 2 besteht. In den metallischen Bereich 1 wurden nach dem Abguß die Bohrungen 3 und 4 angebracht, über die der Schläger an der Hammermühle befestigt wird. Der Schläger besitzt in seinen einzelnen Bereichen folgende Härten:

  • metallischer Bereich HV30 = 240,
  • verschleißbeständige Zone HV30 = 450 - 550,
  • Hartmetallteilchen in der ver-schleißbeständigen Zone HV30 = 1100.
To produce a racket which is to be installed in a hammer mill and fastened there by screwing and whose dimensions are 160 x 200 x 500 mm, an alloy is made from 0.2% by weight carbon, 1.5% by weight Silicon, 5 wt% manganese, 2 wt% chromium, 15 wt% nickel, 3 wt% niobium, 1 wt% boron ,. 1% by weight vanadium and the rest iron consists in a ceramic form of bound molding sand poured. Before the casting, a plastic carrier was introduced into the mold, in which irregularly shaped hard metal particles with a diameter of 0.5 to 2 mm are embedded. The plastic carrier evaporates residue-free during casting, and the hard metal particles sink in the metal melt and form the wear-resistant zone in the lower part of the cast composite body, which takes up approx. 10 vol.% Of the racket and has a hard metal content of approx. 80 vol.% . The drawing shows the cross section of the racket, which consists of the hard metal-free metallic region 1 and the hard metal-containing wear-resistant zone 2. In the metallic area 1 after the casting, the holes 3 and 4 were made, via which the racket is attached to the hammer mill. The racket has the following hardnesses in its individual areas:
  • metallic area HV30 = 240,
  • wear-resistant zone HV30 = 450 - 550,
  • Tungsten carbide particles in the wear-resistant zone HV30 = 1100.

Der entsprechend der Erfindung ausgebildete Schläger hat sich im praktischen Einsatz bei der Zerkleinerung von Kalksandstein sehr gut bewährt.The racket designed in accordance with the invention has proven itself very well in practical use in the crushing of sand-lime brick.

Claims (11)

1. Verschleißbeständiger Verbundkörper, der aus einem metallischen Basiswerkstoff besteht und eine verschleißbeständige Zone aufweist, die neben dem Basiswerkstoff Hartstoff- und/oder Hartmetallteilchen enthält, dadurch gekennzeichnet, daß der Basiswerkstoff aus 0,001 bis 1,5 Gew.-% Kohlenstoff, 0,5 bis 8 Gew.-% Bor, 1 bis 8 Gew.-% Niob, 0,2 bis 6 Gew.-% Chrom, O bis 30 Gew.-% Nickel, 0 bis 10 Gew.-% Mangan, 0 bis 6 Gew.-% Vanadin, 0 bis 5 Gew.-% Molybdän, O bis 5 Gew.-% Silicium sowie Rest Eisen zusammengesetzt ist, daß die Hartstoff- und Hartmetallteilchen einen Durchmesser von 0,1 bis 20 mm aufweisen und daß der Anteil der Hartstoff- und Hartmetallteilchen in der verschleißbeständigen Zone zwischen 25 und 95 Vol.-% liegt.1. Wear-resistant composite body, which consists of a metallic base material and has a wear-resistant zone which contains hard material and / or hard metal particles in addition to the base material, characterized in that the base material consists of 0.001 to 1.5 wt .-% carbon, 0.5 up to 8% by weight boron, 1 to 8% by weight niobium, 0.2 to 6% by weight chromium, O to 30% by weight nickel, 0 to 10% by weight manganese, 0 to 6% by weight .-% Vanadium, 0 to 5 wt .-% molybdenum, O to 5 wt .-% silicon and the rest of iron is composed that the hard material and hard metal particles have a diameter of 0.1 to 20 mm and that the proportion of hard material - And hard metal particles in the wear-resistant zone between 25 and 95 vol .-%. 2. Verbundkörper nach Anspruch 1, dadurch gekennzeichnet, daß der Basiswerkstoff aus 0,05 bis 0,5 Gew.-% Kohlenstoff, 0,5 bis 2 Gew.-% Bor, 2 bis 4 Gew.-% Niob, 2 bis 4 Gew.-% Chrom, 10 bis 20 Gew.-% Nickel, 4 bis 8 Gew.-% Mangan, 1 bis 3 Gew.-% Vanadin, O bis 2 Gew.-% Molybdän, 1 bis 3 Gew.-% Silicium sowie Rest Eisen zusammengesetzt ist.2. Composite body according to claim 1, characterized in that the base material made of 0.05 to 0.5 wt .-% carbon, 0.5 to 2 wt .-% boron, 2 to 4 wt .-% niobium, 2 to 4 % By weight of chromium, 10 to 20% by weight of nickel, 4 to 8% by weight of manganese, 1 to 3% by weight of vanadium, O to 2% by weight of molybdenum, 1 to 3% by weight of silicon as well as remainder iron is composed. 3. Verbundkörper nach den Ansprüchen 1 bis 2, dadurch gekennzeichnet, daß die Hartstoffteilchen aus WC und/oder W2C bestehen.3. Composite body according to claims 1 to 2, characterized in that the hard material particles consist of WC and / or W 2 C. 4. Verbundkörper nach den Ansprüchen 1 bis 2, dadurch gekennzeichnet, daß die Hartmetallteilchen aus gebrochenem Hartmetallschrott bestehen.4. Composite body according to claims 1 to 2, characterized in that the hard metal particles consist of broken hard metal scrap. 5. Verbundkörper nach den Ansprüchen bis 4, dadurch gekennzeichnet, daß der Anteil der verschleißbeständigen Zone im Verbundkörper zwischen 2 und 50 Vol.-% liegt.5. Composite body according to claims to 4, characterized in that the proportion of the wear-resistant zone in the composite body is between 2 and 50 vol .-%. 6. Verfahren zur Herstellung des Verbundkörpers nach den Ansprüchen bis 5, dadurch gekennzeichnet, daß eine Metallschmelze, die aus 0,001 bis 1,5 Gew.-% Kohlenstoff, 0,5 bis 8 Gew.-% Bor, 1 bis 8 Gew.-% Niob, 0,2 bis 6 Gew.-% Chrom, O bis 30 Gew.-% Nickel, O bis 10 Gew.-% Mangan, O bis 6 Gew.-% Vanadin, O bis 5 Gew.-% Molybdän, O bis 5 Gew.-% Silicium sowie Rest Eisen besteht, in eine keramische Form gegossen wird und daß danach in die flüssige Metallschmelze Hartstoff-und/oder Hartmetallteilchen, die einen Durchmesser von 0,1 bis 20 mm haben, in einer solchen Menge eingebracht werden, daß ihr Anteil in der verschleißbeständigen Zone zwischen 25 und 95 Vol.-% liegt.6. A method for producing the composite body according to claims 5, characterized in that a molten metal consisting of 0.001 to 1.5 wt .-% carbon, 0.5 to 8 wt .-% boron, 1 to 8 wt .-- % Niobium, 0.2 to 6% by weight chromium, O to 30% by weight nickel, O to 10% by weight manganese, O to 6% by weight vanadium, O to 5% by weight molybdenum, There is 0 to 5% by weight of silicon and the remainder iron, is poured into a ceramic mold and then hard material and / or hard metal particles, which have a diameter of 0.1 to 20 mm, are introduced into the liquid metal melt in such an amount be that their share in the wear-resistant zone is between 25 and 95 vol .-%. 7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß die Form aus gebundenem Formsand besteht.7. The method according to claim 6, characterized in that the mold consists of bound molding sand. 8. Verfahren nach den Ansprüchen 6 bis 7, dadurch gekennzeichnet, daß die Hartstoff- und/oder Hartmetallteilchen gleichmäßig auf die Oberfläche der Metallschmelze gestreut werden.8. The method according to claims 6 to 7, characterized in that the hard material and / or hard metal particles are scattered evenly on the surface of the molten metal. 9. Verfahren nach den Ansprüchen 6 bis 7, dadurch gekennzeichnet, daß die in einen rückstandsfrei verdampfenden Kunststoffträger eingebetteten Hartstoff- und/oder Hartmetallteilchen vor dem Abguß in die Form eingebracht werden.9. The method according to claims 6 to 7, characterized in that the embedded in a residue-free evaporating plastic carrier hard and / or hard metal particles are introduced into the mold before casting. 10. Verfahren nach den Ansprüchen 6 bis 9, dadurch gekennzeichnet, daß die Form während des Einbringens der Hartstoff- und/oder Hartmetallteilchen vibriert.10. The method according to claims 6 to 9, characterized in that the shape vibrates during the introduction of the hard material and / or hard metal particles. 11. Verwendung des Verbundkörpers nach den Ansprüchen 1 bis 5 zur Herstellung von Werkzeugen zum Abtragen und/oder Zerkleinern von Kohle, Gesteinen, Mineralien, Erdreich, Glas und Müll.11. Use of the composite body according to claims 1 to 5 for the manufacture of tools for removing and / or crushing coal, rocks, minerals, soil, glass and waste.
EP84103772A 1983-04-27 1984-04-05 Abrasion-resistant composite article and process for its manufacture Expired EP0123961B1 (en)

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DE3315125A DE3315125C1 (en) 1983-04-27 1983-04-27 Wear-resistant composite body and method for its production
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0322397A2 (en) * 1987-12-23 1989-06-28 BÖHLER Gesellschaft m.b.H. High speed steel prepared by powder metallurgy, wear-resistant part prepared thereby and process for its manufacture
EP0480850A1 (en) * 1990-10-11 1992-04-15 Technogenia S.A. Method of forming bodies having an abrasion resistant surface
WO1994011541A1 (en) * 1992-11-19 1994-05-26 Sheffield Forgemasters Limited Engineering ferrous metals, in particular cast iron and steel

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2102656A1 (en) * 1992-12-14 1994-06-15 Dwight D. Erickson Abrasive grain comprising calcium oxide and/or strontium oxide
DE19528512C2 (en) * 1995-08-03 2001-02-22 Swb Stahlformgusgmbh Wear parts and process for their manufacture
US9616951B2 (en) 2002-03-06 2017-04-11 Deere & Company Non-carburized components of track-type machines having a metallurgically bonded coating
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US9138805B2 (en) 2002-03-06 2015-09-22 Deere & Company Method for applying wear resistant coating to mechanical face seal
US7175687B2 (en) 2003-05-20 2007-02-13 Exxonmobil Research And Engineering Company Advanced erosion-corrosion resistant boride cermets
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US7074253B2 (en) * 2003-05-20 2006-07-11 Exxonmobil Research And Engineering Company Advanced erosion resistant carbide cermets with superior high temperature corrosion resistance
US7175686B2 (en) * 2003-05-20 2007-02-13 Exxonmobil Research And Engineering Company Erosion-corrosion resistant nitride cermets
WO2007030701A2 (en) * 2005-09-07 2007-03-15 M Cubed Technologies, Inc. Metal matrix composite bodies, and methods for making same
US7731776B2 (en) 2005-12-02 2010-06-08 Exxonmobil Research And Engineering Company Bimodal and multimodal dense boride cermets with superior erosion performance
CA2705769A1 (en) 2007-11-20 2009-05-28 Exxonmobil Research And Engineering Company Bimodal and multimodal dense boride cermets with low melting point binder
WO2015103670A1 (en) * 2014-01-09 2015-07-16 Bradken Uk Limited Wear member incorporating wear resistant particles and method of making same
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BE1027444B1 (en) 2020-02-11 2021-02-10 Magotteaux Int COMPOSITE WEAR PART
EP3885061A1 (en) 2020-03-27 2021-09-29 Magotteaux International S.A. Composite wear component
CN112522621A (en) * 2020-11-30 2021-03-19 自贡硬质合金有限责任公司 Composite wear-resistant metal block and preparation method thereof
EP4155008A1 (en) 2021-09-23 2023-03-29 Magotteaux International S.A. Composite wear component
CN114472856B (en) * 2022-04-14 2022-06-28 唐山贵金甲科技有限公司 Roller tooth sleeve of steel slag treatment crushing roller press and production process

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2107884A1 (en) * 1970-02-18 1971-11-25 Sumitomo Electric Industries Composite body of high strength based on meta-bonded tungsten carbide
DE2139738A1 (en) * 1971-08-07 1973-02-22 Deutsche Edelstahlwerke Gmbh SEALING ELEMENT
FR2169066A1 (en) * 1972-01-24 1973-09-07 Chromalloy American Corp
US4146080A (en) * 1976-03-18 1979-03-27 Permanence Corporation Composite materials containing refractory metallic carbides and method of forming the same

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781159A (en) * 1953-05-27 1957-02-12 Gerlach Elizabeth Jane Moisture impervious container
US3723092A (en) * 1968-03-01 1973-03-27 Int Nickel Co Composite metal powder and production thereof
US3728088A (en) * 1968-03-01 1973-04-17 Int Nickel Co Superalloys by powder metallurgy
DE1949777A1 (en) * 1968-11-13 1970-10-01 Zentralinstitut Schweiss Highly wear-resistant castings prodn
US3955038A (en) * 1973-04-09 1976-05-04 Sandvik Aktiebolag Hard metal body
DE2508851A1 (en) * 1975-02-28 1976-09-09 Toyo Kohan Co Ltd Sintered hard metal alloy of iron, or iron-containing, boride - dispersed through metallic phase
US3995935A (en) * 1975-04-28 1976-12-07 International Telephone And Telegraph Corporation Optical coupler
FR2416756A1 (en) * 1978-02-09 1979-09-07 Pechiney Aluminium PROCESS FOR INCORPORATION OF DIVIDED MATERIALS ON THE SURFACE OF ALUMINUM MOLDED PARTS AND MOLD FOR ITS APPLICATION
NL7807798A (en) * 1978-07-21 1980-01-23 Elbar Bv METHOD FOR APPLYING A PROTECTIVE SILICONE COATING ON ARTICLES MADE FROM SUPER ALLOYS
DE2846889C2 (en) * 1978-10-27 1985-07-18 Toyo Kohan Co., Ltd., Tokio/Tokyo Alloy powder, process for its manufacture and its use for the manufacture of sintered molded parts
GB2032457B (en) * 1978-10-27 1983-05-11 Toyo Kohan Co Ltd Hard alloy powder
DE2919477C2 (en) * 1979-05-15 1982-08-05 Fried. Krupp Gmbh, 4300 Essen Wear-resistant composite material, method for its manufacture and use of the composite material
US4346137A (en) * 1979-12-19 1982-08-24 United Technologies Corporation High temperature fatigue oxidation resistant coating on superalloy substrate
US4358923A (en) * 1980-04-10 1982-11-16 Surface Technology, Inc. Composite coatings for open-end machinery parts
SE453265B (en) * 1983-02-14 1988-01-25 Vni Instrument Inst CUTTING TOOLS WITH RESISTABLE COATING AND PROCEDURES FOR PRODUCING THIS
JPS59209853A (en) * 1983-05-13 1984-11-28 川崎重工業株式会社 Aluminum casting, surface thereof alkali-resisting treated has abrasion-resisting layer, and manufacture thereof
JPS6011288A (en) * 1983-06-30 1985-01-21 三菱マテリアル株式会社 Surface coated sialon-base ceramic tool member

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2107884A1 (en) * 1970-02-18 1971-11-25 Sumitomo Electric Industries Composite body of high strength based on meta-bonded tungsten carbide
DE2139738A1 (en) * 1971-08-07 1973-02-22 Deutsche Edelstahlwerke Gmbh SEALING ELEMENT
FR2169066A1 (en) * 1972-01-24 1973-09-07 Chromalloy American Corp
US4146080A (en) * 1976-03-18 1979-03-27 Permanence Corporation Composite materials containing refractory metallic carbides and method of forming the same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0322397A2 (en) * 1987-12-23 1989-06-28 BÖHLER Gesellschaft m.b.H. High speed steel prepared by powder metallurgy, wear-resistant part prepared thereby and process for its manufacture
EP0322397A3 (en) * 1987-12-23 1989-10-25 Bohler Gesellschaft M.B.H. High speed steel prepared by powder metallurgy, wear-resistant part prepared thereby and process for its manufacture
EP0480850A1 (en) * 1990-10-11 1992-04-15 Technogenia S.A. Method of forming bodies having an abrasion resistant surface
FR2667809A1 (en) * 1990-10-11 1992-04-17 Technogenia Sa PROCESS FOR PRODUCING PARTS WITH ANTI - ABRASION SURFACE.
WO1994011541A1 (en) * 1992-11-19 1994-05-26 Sheffield Forgemasters Limited Engineering ferrous metals, in particular cast iron and steel
GB2289288A (en) * 1992-11-19 1995-11-15 Sheffield Forgemasters Engineering ferrous metals,in particular cast iron and steel
GB2289288B (en) * 1992-11-19 1997-04-16 Sheffield Forgemasters Rolling Mill Roll Comprising Engineering Ferrous MetalS.

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US4626464A (en) 1986-12-02
EP0123961A3 (en) 1986-01-02
ATE33042T1 (en) 1988-04-15
JPS59205446A (en) 1984-11-21
DE3315125C1 (en) 1984-11-22
JPH066773B2 (en) 1994-01-26
EP0123961B1 (en) 1988-03-16

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