EP0838288A1 - Wear resistant composite cast pieces - Google Patents

Wear resistant composite cast pieces Download PDF

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Publication number
EP0838288A1
EP0838288A1 EP96202741A EP96202741A EP0838288A1 EP 0838288 A1 EP0838288 A1 EP 0838288A1 EP 96202741 A EP96202741 A EP 96202741A EP 96202741 A EP96202741 A EP 96202741A EP 0838288 A1 EP0838288 A1 EP 0838288A1
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EP
European Patent Office
Prior art keywords
inserts
ceramic
wear resistant
zro2
al2o3
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.)
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EP96202741A
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German (de)
French (fr)
Inventor
Hubert Francois
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Individual
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Individual
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Priority to EP96202741A priority Critical patent/EP0838288A1/en
Priority to US10/448,004 priority patent/USRE39998E1/en
Priority to UA99031803A priority patent/UA46124C2/en
Priority to PT97943824T priority patent/PT930948E/en
Priority to KR1020067001837A priority patent/KR20060013699A/en
Priority to DE69702988T priority patent/DE69702988T2/en
Priority to PCT/EP1997/004762 priority patent/WO1998015373A1/en
Priority to PL97332578A priority patent/PL189446B1/en
Priority to AT97943824T priority patent/ATE195895T1/en
Priority to EEP199900139A priority patent/EE9900139A/en
Priority to AU45529/97A priority patent/AU723329B2/en
Priority to KR1019997002798A priority patent/KR100691295B1/en
Priority to CZ19991116A priority patent/CZ294041B6/en
Priority to EP97943824A priority patent/EP0930948B1/en
Priority to CN97198472A priority patent/CN1114513C/en
Priority to BR9712188-6A priority patent/BR9712188A/en
Priority to US09/269,723 priority patent/US6399176B1/en
Priority to ES97943824T priority patent/ES2150278T3/en
Priority to JP51711098A priority patent/JP2001504036A/en
Priority to RU99108736A priority patent/RU2177389C2/en
Priority to CA002266475A priority patent/CA2266475A1/en
Priority to HU9904505A priority patent/HU224208B1/en
Priority to TR1999/00645T priority patent/TR199900645T2/en
Priority to SK402-99A priority patent/SK284900B6/en
Priority to ZA978672A priority patent/ZA978672B/en
Priority to ID973347A priority patent/ID17782A/en
Priority to MYPI97004643A priority patent/MY128314A/en
Publication of EP0838288A1 publication Critical patent/EP0838288A1/en
Priority to US10/152,569 priority patent/US6520241B2/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/004—Shape or construction of rollers or balls
    • B02C15/005—Rollers or balls of composite construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/02—Casting in, on, or around objects which form part of the product for making reinforced articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/06—Casting in, on, or around objects which form part of the product for manufacturing or repairing tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal

Definitions

  • the present invention relates to a composite wear part produced by casting and made up of a metal matrix, the wear surface has inserts with good resistance to wear.
  • the invention relates in particular to wearing parts used in crushing, crushing and transport facilities various abrasive materials found in industries such as cement plants, mines, metallurgy, power plants or various careers. These parts are often subjected to high mechanical stresses in the mass and high wear by abrasion to their working surface. It is therefore desirable that these parts have a high resistance to abrasion and a certain ductility to be able to withstand mechanical stresses such as shocks and to possibly be machined.
  • the ceramic cake can be formed in pouring into a suitable mold grains of ceramic material and then a liquid glue with good fluidity, for example a resin liquid which, after hardening, retains the grains to form the ceramic structure.
  • a liquid glue with good fluidity for example a resin liquid which, after hardening, retains the grains to form the ceramic structure.
  • the ceramic material can be made aluminum oxide or zirconium oxide.
  • This known technique is however limited to the molding of precision of relatively small parts and where compatibility between the metal matrix and the ceramic structure, especially in terms of thermal behavior, hardly poses any problems since when casting metal the mold and the ceramic structure are preheated and the part does not undergo subsequent heat treatment.
  • the technique is, moreover, limited to the production of specific parts with specific requirements determined for hardness and toughness, as well as for parts sold at a very high price because the lost wax molding process is itself very expensive.
  • the object of the present invention is to provide a wearing part composite with ceramic inserts meeting, so satisfies the requirements listed above.
  • the invention provides a composite wear part produced by conventional or centrifugal casting and consisting of a metal matrix, the wear surface of which includes inserts having good wear resistance, characterized in that the inserts are ceramic parts, themselves composite, consisting of 20 to 80% of Al 2 O 3 and 80 to 20% of ZrO 2 , the percentages being expressed by weight of the constituents.
  • the inserts may, in addition, contain other oxides, the proportion by weight does not exceed 3 to 4%.
  • the inserts consist of an agglomerate of ceramic grains composites preferably having a particle size included in the range F6 to F20 of the FEPA standard, i.e. a diameter included between approximately 1.5 mm and 5.5 mm. These grains can be made by electrofusion, sintering, thermal spraying or any other process merging the two constituents.
  • the invention is based on the observation that aluminum oxide (corundum) and zirconium oxide have different properties, which allows, by a judicious choice in the aforementioned ranges, to adjust the hardness, toughness and the coefficient of thermal expansion of the ceramic composite so as to obtain good hardness and good toughness and to make it compatible with the precise application for which the part is intended, on the one hand, and to obtain, on the other hand, a coefficient of expansion of the ceramic composite which is close to that of the chosen casting metal, that is to say of cast iron or steel having a coefficient of expansion of between 10.10 -6 and 11.10 -6 .
  • Zirconium oxide has the advantage of having a coefficient of expansion which is close to that of metal. In addition, it contributes to good toughness, that is to say it reduces the risk of breakage.
  • Aluminum oxide on the other hand, contributes to good hardness. These composirts are known to have good toughness.
  • the zirconia particles present in alumina make it possible, by well-known mechanisms, to increase the resistance to cracking of the latter and thus to obtain a toughness greater than that of each component considered in isolation, namely ZrO 2 or Al 2 O 3 .
  • the choice of the proportions of the constituents of the ceramic insert composite can, of course, also take into account the composition of the casting metal in view of the properties required the application for which the part is intended. Similarly, the choice of composition of the casting metal can be adapted to the nature of the composite insert.
  • Example 1 manufacture of an axis crusher ejector vertical.
  • a mixture of 75% Al 2 O 3 and 25% ZrO 2 is formed, the two constituents of which are fused by electrofusion to form grains with a particle size included in categories F6 to F20 of the FEPA standard. These grains are then poured into a mold of suitable shape with a liquid resin which, after hardening, retains the grains together to form the ceramic wafer which must constitute the insert of the wear part. These inserts are placed in a suitable mold into which a liquid metal is poured comprising 3% carbon, 26% chromium and other traditional elements in small proportion which are always encountered in alloys of this type. A wear part is thus produced with ceramic inserts with a hardness of the order of 1600 Hv with a coefficient of expansion close to 8.10 -6 , maintained in a cast iron matrix with a hardness close to 750 Hv.
  • Example 2 manufacture of a crusher rotor.
  • An insert is prepared as in Example 1 but by choosing, this time, a ceramic composition which favors the coefficient of expansion at the expense of hardness, more precisely 40% of ZrO 2 and 60% of Al 2 O 3 . This produces an insert with a hardness of around 1,350 Hv with a coefficient of expansion close to 9.10 -6 .
  • the goal here is to reduce the risk of cracks in the room because of the high impact level to which this type of part is subjected.
  • the metallic matrix will consist of a manganese steel with a composition of 1% carbon, 14% manganese and 1.5% molybdenum.

Abstract

In a cast composite wear part consisting of a metallic matrix having wear resistant inserts in the or each working face, the inserts are formed from a ceramic wafer which consists of a homogeneous solid solution of 20-80 wt.% Al2O3 and 80-20 wt.% ZrO2 and which is impregnated with liquid metal during casting. Preferably, the ceramic material consists of 55-60 wt.% Al2O3 and 38-42 wt.% ZrO2 or 70-77 wt.% Al2O3 and 23-27 wt.% ZrO2 and is present in amount 35-80 (preferably 40-60, especially about 50) wt.% in the insert. Also claimed are (i) a cast composite wear part consisting of a metallic matrix containing two or more adjacent ceramic wafers with minimal spacing (preferably about 10 mm to allow liquid metal entry); and (ii) a cast composite wear part consisting of a metallic matrix including a wear resistant ceramic wafer in the form of a honeycomb structure, the cells having a polygonal or circular shape and the cell wall thickness preferably being 5-25 mm.

Description

La présente invention concerne une pièce d'usure composite réalisée par coulée et constituée d'une matrice métallique dont la surface d'usure comporte des inserts ayant une bonne résistance à l'usure.The present invention relates to a composite wear part produced by casting and made up of a metal matrix, the wear surface has inserts with good resistance to wear.

L'invention concerne notamment des pièces d'usure utilisées dans des installations de broyage, de concassage et de transport de matières abrasives diverses que l'on rencontre dans les industries telles que cimenteries, mines, métallurgie, centrales électriques ou carrières diverses. Ces pièces sont souvent soumises à des sollicitations mécaniques élevées dans la masse et à une forte usure par abrasion à leur surface travaillante. Il est dès lors souhaitable que ces pièces présentent une forte résistance à l'abrasion et une certaine ductilité pour pouvoir résister aux sollicitations mécaniques telles que des chocs et pour pouvoir éventuellement être usinées.The invention relates in particular to wearing parts used in crushing, crushing and transport facilities various abrasive materials found in industries such as cement plants, mines, metallurgy, power plants or various careers. These parts are often subjected to high mechanical stresses in the mass and high wear by abrasion to their working surface. It is therefore desirable that these parts have a high resistance to abrasion and a certain ductility to be able to withstand mechanical stresses such as shocks and to possibly be machined.

Étant donné que ces deux propriétés sont difficilement conciliables entre elles dans la même matière, on a déjà proposé des pièces composites ayant un noyau en alliage relativement ductile dans la surface duquel sont noyés des inserts isolés ayant une bonne résistance à l'usure.Since these two properties are hardly reconcilable between them in the same matter, we have already proposed composite parts having a relatively ductile alloy core in the surface of which are insulated inserts having good wear resistance.

Le document EP-0 476 496 propose cette technique pour la réalisation de galets de broyage dont la surface est garnie d'inserts en fonte au chrome.Document EP-0 476 496 proposes this technique for the production of grinding rollers, the surface of which is lined with inserts chrome cast iron.

Sachant que les matières céramiques ont des bonnes propriétés à l'abrasion, il est également connu d'utiliser ces matériaux pour améliorer la résistance à l'abrasion de pièces d'usure. Le document EP-0 575 685 propose l'utilisation de matières céramiques dans un moulage de précision de petites pièces d'usure, mais ici, on ne peut pas parler d'inserts proprement dits tels que définis dans le document précité. Selon ce document, on forme d'abord une galette céramique de structure spongieuse présentant un réseau tridimensionnel de pores ouverts communiquant tous entre eux, donc une sorte d'éponge céramique. Sur cette structure, on coule ensuite le métal en fusion qui remplit les pores et forme, après solidification, la matrice métallique de la pièce composite. La galette céramique peut être formée en versant dans un moule approprié des grains de matières céramiques et ensuite, une colle liquide d'une bonne fluidité, par exemple une résine liquide qui, après durcissement, retient les grains pour former la structure céramique. La matière céramique peut être constituée d'oxyde d'aluminium ou d'oxyde de zirconium.Knowing that ceramic materials have good properties abrasion, it is also known to use these materials for improve the abrasion resistance of wearing parts. The document EP-0 575 685 proposes the use of ceramic materials in a precision molding of small wear parts, but here we cannot not talk about inserts proper as defined in the document cited above. According to this document, we first form a ceramic cake of spongy structure presenting a three-dimensional network of open pores communicating with each other, so a kind of sponge ceramic. On this structure, the molten metal is then poured which fills the pores and forms, after solidification, the metallic matrix of the composite part. The ceramic cake can be formed in pouring into a suitable mold grains of ceramic material and then a liquid glue with good fluidity, for example a resin liquid which, after hardening, retains the grains to form the ceramic structure. The ceramic material can be made aluminum oxide or zirconium oxide.

Cette technique connue se limite toutefois aux moulages de précision de pièces de dimensions relativement petites et ou la compatibilité entre la matrice métallique et la structure céramique, notamment en terme de comportement thermique, ne pose guère de problèmes étant donné que, lors de la coulée du métal, le moule et la structure céramique sont préchauffés et que la pièce ne subit pas de traitement thermique ultérieur. La technique est, en outre, limitée à la réalisation de pièces particulières avec des exigences bien déterminées quant à la dureté et la ténacité, ainsi qu' à des pièces vendues à un prix très élevé car le procédé de moulage en cire perdue est lui-même très coûteux.This known technique is however limited to the molding of precision of relatively small parts and where compatibility between the metal matrix and the ceramic structure, especially in terms of thermal behavior, hardly poses any problems since when casting metal the mold and the ceramic structure are preheated and the part does not undergo subsequent heat treatment. The technique is, moreover, limited to the production of specific parts with specific requirements determined for hardness and toughness, as well as for parts sold at a very high price because the lost wax molding process is itself very expensive.

C'est la raison pour laquelle cette technique n'est pas transposable telle quelle à la fabrication de pièces d'usure à inserts de dimensions plus élevées pour les diverses applications précitées, notamment parce que, en général, il n 'est pas possible ou difficile de préchauffer le moule et les inserts lors de la coulée et que la pièce subit généralement un traitement thermique ultérieur. Il faut donc qu'il y ait une certaine compatibilité du point de vue comportement thermique entre la matière céramique et le métal pour éviter des fissurations dues aux chocs thermiques lors de la coulée du métal liquide sur les inserts céramiques et celles pouvant être engendrées lors du traitement thermique ultérieur et occasionnées par les coefficients de dilatation différents de ces deux matériaux.This is the reason why this technique is not transferable as is to the production of wear parts with inserts larger dimensions for the various aforementioned applications, in particular because, in general, it is not possible or difficult to preheat the mold and the inserts during casting and that the part generally undergoes a subsequent heat treatment. So he must there is some behavioral compatibility between the ceramic material and the metal to avoid cracking due to thermal shock during metal casting liquid on ceramic inserts and those that can be generated during the subsequent heat treatment and caused by different coefficients of expansion of these two materials.

Il faut, par ailleurs, pouvoir adapter les propriétés mécaniques de la matière céramique à celle du métal afin de réaliser une pièce dont les propriétés mécaniques répondent aux exigences de l'application particulière à laquelle elle est destinée.It is also necessary to be able to adapt the mechanical properties of the ceramic material to that of metal in order to produce a part of which mechanical properties meet the requirements of the application for which it is intended.

Le but de la présente invention est de prévoir une pièce d'usure composite avec des inserts céramiques répondant, de façon satisfaisante, aux exigences énumérées ci-dessus.The object of the present invention is to provide a wearing part composite with ceramic inserts meeting, so satisfies the requirements listed above.

Pour atteindre cet objectif, l'invention propose une pièce d'usure composite réalisée par coulée classique ou centrifuge et constituée d'une matrice métallique dont la surface d'usure comporte des inserts ayant une bonne résistance à l'usure, caractérisée en ce que les inserts sont des pièces céramiques, elles mêmes composites, constituées de 20 à 80% de Al2O3 et 80 à 20% de ZrO2, les pourcentages étant exprimés en poids des constituants.To achieve this objective, the invention provides a composite wear part produced by conventional or centrifugal casting and consisting of a metal matrix, the wear surface of which includes inserts having good wear resistance, characterized in that the inserts are ceramic parts, themselves composite, consisting of 20 to 80% of Al 2 O 3 and 80 to 20% of ZrO 2 , the percentages being expressed by weight of the constituents.

Les inserts peuvent, en outre, contenir d'autres oxydes dont la proportion en poids n'excède pas 3 à 4%.The inserts may, in addition, contain other oxides, the proportion by weight does not exceed 3 to 4%.

Les inserts sont constitués d'un agglomérat de grains céramiques composites ayant, de préférence, une granulométrie comprise dans la gamme F6 à F20 de la norme FEPA, c'est-à-dire un diamètre compris entre environ 1,5 mm et 5,5 mm. Ces grains peuvent être fabriqués par électrofusion, frittage, projection thermique ou tout autre procédé fusionnant les deux constituants.The inserts consist of an agglomerate of ceramic grains composites preferably having a particle size included in the range F6 to F20 of the FEPA standard, i.e. a diameter included between approximately 1.5 mm and 5.5 mm. These grains can be made by electrofusion, sintering, thermal spraying or any other process merging the two constituents.

L'invention repose sur la constatation que l'oxyde d'aluminium (corindon) et l'oxyde de zirconium ont des propriétés différentes, ce qui permet, par un choix judicieux dans la fourchettes précitées, d'ajuster la dureté, la ténacité et le coefficient de dilatation thermique du composite céramique de façon à aller une bonne dureté et une bonne ténacité et le rendre compatible avec l'application précise à laquelle la pièce est destinée, d'une part, et pour obtenir, d'autre part, un coefficient de dilatation du composite céramique qui est proche de celui du métal de coulée choisi, c'est-à-dire de la fonte ou de l'acier ayant un coefficient de dilatation compris entre 10.10-6 et 11.10-6.The invention is based on the observation that aluminum oxide (corundum) and zirconium oxide have different properties, which allows, by a judicious choice in the aforementioned ranges, to adjust the hardness, toughness and the coefficient of thermal expansion of the ceramic composite so as to obtain good hardness and good toughness and to make it compatible with the precise application for which the part is intended, on the one hand, and to obtain, on the other hand, a coefficient of expansion of the ceramic composite which is close to that of the chosen casting metal, that is to say of cast iron or steel having a coefficient of expansion of between 10.10 -6 and 11.10 -6 .

L'oxyde de zirconium a l'avantage d'avoir un coefficient de dilatation qui est proche de celui du métal. En outre, il contribue à une bonne ténacité, c'est-à-dire qu'il réduit les risques de casse. L'oxyde d'aluminium, de son côté, contribue à une bonne dureté. Ces composirts sont connus pour présenter une bonne ténacité. Les particules de zircone présentes dans l'alumine permettent en effet, par des mécanismes bien connus, d'augmenter la résistance à la fissuration de cette dernière et d'obtenir ainsi une ténacité supérieure à celle de chaque composant considéré isolément, à savoir ZrO2 ou Al2O3.Zirconium oxide has the advantage of having a coefficient of expansion which is close to that of metal. In addition, it contributes to good toughness, that is to say it reduces the risk of breakage. Aluminum oxide, on the other hand, contributes to good hardness. These composirts are known to have good toughness. The zirconia particles present in alumina make it possible, by well-known mechanisms, to increase the resistance to cracking of the latter and thus to obtain a toughness greater than that of each component considered in isolation, namely ZrO 2 or Al 2 O 3 .

Autrement dit, dans les pièces d'usure qui sont soumises à une forte abrasion, il y a intérêt à augmenter la proportion d'oxyde d'aluminium en ne dépassant pas, toutefois, une certaine limite au-delà de laquelle la résistance à l'abrasion et la ténacité commencent à diminuer. En revanche, pour les pièces qui sont soumises à des chocs importants ou à des pressions élevées, il y a intérêt à privilégier le coefficient de dilatation au détriment de la dureté et à augmenter la proportion d'oxyde de zirconium afin de diminuer les contraintes dans la pièce et, de ce fait, les risques de casse.In other words, in wearing parts which are subject to high abrasion, there is interest in increasing the proportion of oxide of aluminum by not exceeding, however, a certain limit beyond from which abrasion resistance and toughness begin to decrease. On the other hand, for parts which are subjected to shocks important or at high pressures, it is advisable to favor the coefficient of expansion at the expense of hardness and increasing the proportion of zirconium oxide in order to reduce the stresses in the part and, as a result, the risk of breakage.

Pour les pièces où il y a risque de fissuration lors de la coulée ou lors du traitement thermique ultérieur, il est également avantageux d'augmenter la proportion d'oxyde de zirconium pour approcher le coefficient de dilatation de l'insert de celui de la matrice métallique.For parts where there is a risk of cracking during casting or during the subsequent heat treatment, it is also advantageous increase the proportion of zirconium oxide to approach the coefficient of expansion of the insert from that of the metal matrix.

Le choix des proportions des constituants de l'insert céramique composite peut, bien entendu, également tenir compte de la composition du métal de coulée en vue des propriétés qu'exige l'application à laquelle la pièce est destinée. De même, le choix de la composition du métal de coulée peut être adapté à la nature de l'insert composite.The choice of the proportions of the constituents of the ceramic insert composite can, of course, also take into account the composition of the casting metal in view of the properties required the application for which the part is intended. Similarly, the choice of composition of the casting metal can be adapted to the nature of the composite insert.

Exemple 1 : fabrication d'un éjecteur de concasseur à axe vertical.Example 1: manufacture of an axis crusher ejector vertical.

On forme un mélange de 75% de Al2O3 et 25% de ZrO2 dont on fusionne par électrofusion les deux constituants pour former des grains d'une granulométrie comprise dans les catégories F6 à F20 de la norme FEPA. On verse ensuite ces grains dans un moule de forme appropriée avec une résine liquide qui, après durcissement, retient les grains ensemble pour former la galette céramique devant constituer l'insert de la pièce d'usure. On dispose ces inserts dans un moule approprié dans lequel on coule un métal liquide comprenant 3% de carbone, 26% de chrome et d'autres éléments traditionnels en faible proportion que l'on rencontre toujours dans les alliages de ce type. On réalise ainsi une pièce d'usure avec des inserts céramiques d'une dureté de l'ordre de 1 600 Hv avec un coefficient de dilatation voisin de 8.10-6, maintenu dans une matrice de fonte d'une dureté voisine de 750 Hv.A mixture of 75% Al 2 O 3 and 25% ZrO 2 is formed, the two constituents of which are fused by electrofusion to form grains with a particle size included in categories F6 to F20 of the FEPA standard. These grains are then poured into a mold of suitable shape with a liquid resin which, after hardening, retains the grains together to form the ceramic wafer which must constitute the insert of the wear part. These inserts are placed in a suitable mold into which a liquid metal is poured comprising 3% carbon, 26% chromium and other traditional elements in small proportion which are always encountered in alloys of this type. A wear part is thus produced with ceramic inserts with a hardness of the order of 1600 Hv with a coefficient of expansion close to 8.10 -6 , maintained in a cast iron matrix with a hardness close to 750 Hv.

Exemple 2 : fabrication d'un rotor de concasseur.Example 2: manufacture of a crusher rotor.

On prépare un insert comme dans l'exemple 1 mais en choisissant, cette fois-ci, une composition céramique qui privilège le coefficient de dilatation au détriment de la dureté, plus précisément 40% de ZrO2 et 60% de Al2O3. On réalise ainsi un insert d'une dureté d'environ 1 350 Hv avec un coefficient de dilatation voisin de 9.10-6.An insert is prepared as in Example 1 but by choosing, this time, a ceramic composition which favors the coefficient of expansion at the expense of hardness, more precisely 40% of ZrO 2 and 60% of Al 2 O 3 . This produces an insert with a hardness of around 1,350 Hv with a coefficient of expansion close to 9.10 -6 .

Le but est ici de diminuer le risque de criques dans la pièce à cause du niveau d'impact élevé auquel est soumis ce type de pièce.The goal here is to reduce the risk of cracks in the room because of the high impact level to which this type of part is subjected.

La matrice métallique sera constituée d'un acier au manganèse avec une composition de 1 % de carbone, 14% de manganèse et 1,5% de molybdène.The metallic matrix will consist of a manganese steel with a composition of 1% carbon, 14% manganese and 1.5% molybdenum.

Claims (2)

Pièce d'usure composite réalisée par coulée et constituée d'une matrice métallique dont la surface d'usure comporte des inserts ayant une bonne résistance à l'usure, caractérisée en ce que les inserts sont des pièces céramiques, elles-mêmes composites, constituées de 20% à 80% de Al2O3 et 80 à 20% de ZrO2, les pourcentages étant exprimés en poids des constituants.Composite wear part produced by casting and consisting of a metal matrix, the wear surface of which comprises inserts having good wear resistance, characterized in that the inserts are ceramic parts, themselves composite, made up from 20% to 80% of Al 2 O 3 and 80 to 20% of ZrO 2 , the percentages being expressed by weight of the constituents. Pièce d'usure selon la revendication 1, caractérisée en ce que les inserts sont constitués d'un agglomérat de grains céramiques composites ayant une granulométrie comprise dans la gamme F6 à F20 de la norme FEPA.Wear part according to claim 1, characterized in that that the inserts are made up of an agglomerate of ceramic grains composites having a particle size in the range F6 to F20 of the FEPA standard.
EP96202741A 1996-10-01 1996-10-01 Wear resistant composite cast pieces Withdrawn EP0838288A1 (en)

Priority Applications (28)

Application Number Priority Date Filing Date Title
EP96202741A EP0838288A1 (en) 1996-10-01 1996-10-01 Wear resistant composite cast pieces
EP97943824A EP0930948B1 (en) 1996-10-01 1997-08-27 Composite wear part
US09/269,723 US6399176B1 (en) 1996-10-01 1997-08-27 Composite wear component
BR9712188-6A BR9712188A (en) 1996-10-01 1997-08-27 Composite wear part.
KR1020067001837A KR20060013699A (en) 1996-10-01 1997-08-27 Composite wear part
UA99031803A UA46124C2 (en) 1996-10-01 1997-08-27 COMPOSITION WARNING DETAILS (OPTIONS)
PCT/EP1997/004762 WO1998015373A1 (en) 1996-10-01 1997-08-27 Composite wear part
PL97332578A PL189446B1 (en) 1996-10-01 1997-08-27 Compound working element
AT97943824T ATE195895T1 (en) 1996-10-01 1997-08-27 WEAR-RESISTANT COMPOSITE BODY
EEP199900139A EE9900139A (en) 1996-10-01 1997-08-27 Composite wear-resistant detail
AU45529/97A AU723329B2 (en) 1996-10-01 1997-08-27 Composite wear component
KR1019997002798A KR100691295B1 (en) 1996-10-01 1997-08-27 Composite wear part
ES97943824T ES2150278T3 (en) 1996-10-01 1997-08-27 COMPOSITE WEAR PART.
US10/448,004 USRE39998E1 (en) 1996-10-01 1997-08-27 Composite wear component
CN97198472A CN1114513C (en) 1996-10-01 1997-08-27 Composite wear part
PT97943824T PT930948E (en) 1996-10-01 1997-08-27 COMPOSITE WEAR PUMP
DE69702988T DE69702988T2 (en) 1996-10-01 1997-08-27 WEAR-RESISTANT COMPOSITE BODY
CZ19991116A CZ294041B6 (en) 1996-10-01 1997-08-27 Abrasion-resistant part of composite material
JP51711098A JP2001504036A (en) 1996-10-01 1997-08-27 Composite wear parts
RU99108736A RU2177389C2 (en) 1996-10-01 1997-08-27 Wear-resistant part from composite material
CA002266475A CA2266475A1 (en) 1996-10-01 1997-08-27 Composite wear part
HU9904505A HU224208B1 (en) 1996-10-01 1997-08-27 Composite wear part
TR1999/00645T TR199900645T2 (en) 1996-10-01 1997-08-27 Bile�ik a��nma par�as�.
SK402-99A SK284900B6 (en) 1996-10-01 1997-08-27 Abrasion-resistant part from composite material
ZA978672A ZA978672B (en) 1996-10-01 1997-09-26 Composite wear component
ID973347A ID17782A (en) 1996-10-01 1997-10-03 COMPOSITE COMPONENTS FOR USE
MYPI97004643A MY128314A (en) 1996-10-01 1997-10-03 Composite wear component
US10/152,569 US6520241B2 (en) 1996-10-01 2002-05-23 Composite wear component

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US6030344A (en) * 1996-12-04 2000-02-29 Acuson Corporation Methods and apparatus for ultrasound image quantification
US6086539A (en) * 1996-12-04 2000-07-11 Acuson Corporation Methods and apparatus for ultrasound image quantification
USRE39998E1 (en) 1996-10-01 2008-01-08 Magotteaux International S.A. Composite wear component
US7513295B2 (en) 2001-12-04 2009-04-07 Magotteaux International Sa Cast parts with enhanced wear resistance
US8147980B2 (en) 2006-11-01 2012-04-03 Aia Engineering, Ltd. Wear-resistant metal matrix ceramic composite parts and methods of manufacturing thereof
CN108745508A (en) * 2018-07-09 2018-11-06 徐州鑫华耐磨材料有限公司 Ceramet composite hammer head and its manufacturing method
CN113524393A (en) * 2021-07-02 2021-10-22 红云红河烟草(集团)有限责任公司 Ceramic blade special for filament cutter and manufacturing method
CN113981290A (en) * 2021-09-18 2022-01-28 湖北秦鸿新材料股份有限公司 Ceramic particles, method for the production thereof and use thereof
CN115821096A (en) * 2022-11-30 2023-03-21 山东硕源工业机械设备有限公司 Preparation method of ceramic high-chromium alloy-based wear-resistant composite material

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Publication number Priority date Publication date Assignee Title
USRE39998E1 (en) 1996-10-01 2008-01-08 Magotteaux International S.A. Composite wear component
US6193664B1 (en) 1996-12-04 2001-02-27 Acuson Corporation Method and apparatus for ultrasound image quantification
US6241677B1 (en) 1996-12-04 2001-06-05 Acuson Corporation Method and apparatus for ultrasound image quantification
US6110118A (en) * 1996-12-04 2000-08-29 Acuson Corporation Method and apparatus for ultrasound image quantification
US6030344A (en) * 1996-12-04 2000-02-29 Acuson Corporation Methods and apparatus for ultrasound image quantification
US6086539A (en) * 1996-12-04 2000-07-11 Acuson Corporation Methods and apparatus for ultrasound image quantification
US6322511B1 (en) 1996-12-04 2001-11-27 Acuson Corporation Methods and apparatus for ultrasound image quantification
US6093149A (en) * 1996-12-04 2000-07-25 Acuson Corporation Method and apparatus for setting the integration interval for time integrated surface integral in an ultrasound imaging system
US6464640B1 (en) 1996-12-04 2002-10-15 Acuson Corporation Methods and apparatus for ultrasound imaging with automatic color image positioning
US7513295B2 (en) 2001-12-04 2009-04-07 Magotteaux International Sa Cast parts with enhanced wear resistance
US7935431B2 (en) 2001-12-04 2011-05-03 Magotteaux International Sa Cast parts with enhanced wear resistance
US8147980B2 (en) 2006-11-01 2012-04-03 Aia Engineering, Ltd. Wear-resistant metal matrix ceramic composite parts and methods of manufacturing thereof
CN108745508A (en) * 2018-07-09 2018-11-06 徐州鑫华耐磨材料有限公司 Ceramet composite hammer head and its manufacturing method
CN113524393A (en) * 2021-07-02 2021-10-22 红云红河烟草(集团)有限责任公司 Ceramic blade special for filament cutter and manufacturing method
CN113981290A (en) * 2021-09-18 2022-01-28 湖北秦鸿新材料股份有限公司 Ceramic particles, method for the production thereof and use thereof
CN115821096A (en) * 2022-11-30 2023-03-21 山东硕源工业机械设备有限公司 Preparation method of ceramic high-chromium alloy-based wear-resistant composite material
CN115821096B (en) * 2022-11-30 2023-08-18 山东硕源工业机械设备有限公司 Preparation method of ceramic high-chromium alloy-based wear-resistant composite material

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