EP0481917A1 - Cutting and drilling elements - Google Patents

Cutting and drilling elements Download PDF

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Publication number
EP0481917A1
EP0481917A1 EP91810761A EP91810761A EP0481917A1 EP 0481917 A1 EP0481917 A1 EP 0481917A1 EP 91810761 A EP91810761 A EP 91810761A EP 91810761 A EP91810761 A EP 91810761A EP 0481917 A1 EP0481917 A1 EP 0481917A1
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EP
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Prior art keywords
weight
cutting
drilling
matrix material
alloys
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EP91810761A
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German (de)
French (fr)
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EP0481917B1 (en
Inventor
Dietmar Sartor
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Hilti AG
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Hilti AG
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Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes

Definitions

  • Tools are used for the vibration-free drilling and cutting in natural rock, such as rock formations or in building materials, such as concrete and brick, the cutting of which is filled with hard materials such as carbides, nitrides, carbide-nitride mixed phases, diamond and the like.
  • hard materials such as carbides, nitrides, carbide-nitride mixed phases, diamond and the like.
  • Materials such as natural, synthetic or polycrystalline diamond, B4C, SiC, TiC, BN, TiN, Al203, Zr02, hard metal etc. are often used as hard materials.
  • diamond or hard metal are used for concrete and hard rock processing, for softer building materials SiC, Al203 etc.
  • the abrasive fine particles of these materials are often embedded in a matrix.
  • cutting and drilling elements These matrices containing abrasive particles are hereinafter referred to as cutting and drilling elements, regardless of whether they are arranged on supports such as drill shafts, disks and the like or not.
  • the cutting and drilling elements can have different shapes depending on the cutting or drilling purpose. E.g. the shape of hollow drill bits, of rings, pins, plates, segments and other simple and complex shaped bodies, in the case of cutting discs, for example segment, ring or disc shape, the shape of drilling cutting heads, plates, cylinders and the like.
  • the matrix materials like the abrasive particles or parts embedded therein, are subjected to a wear process, the wear depending on the respective processing conditions, namely the hardness of the material to be cut or drilled.
  • a large number of different matrix materials would be required. For obvious reasons, this is not desirable in practice and is hardly feasible.
  • the search for a universally usable matrix material has so far been unsuccessful, especially when considering economic aspects.
  • the solution according to the invention consists in the use of copper alloys which can be hardened by aging to different hardnesses or strengths as matrices for the production of shaped bodies loaded with abrasive particles in the matrix as drilling and cutting elements for drilling and cutting purposes.
  • the particular advantage of this solution is that by using only one Cu alloy on the manufacturer side, and possibly also on the user side, by means of a heat treatment adapted to the specific application, namely isothermal aging, i.e. aging, matrix materials with abrasive particles and the required hardness are producible. In this way, it is possible to manufacture or keep ready cutting drilling elements corresponding to the respective application requirements using a single matrix composition.
  • the moldings can be of the type described by way of example at the beginning.
  • Copper alloys such as copper-beryllium alloys with approximately 1 to 2% by weight of Be, also with small proportions, cobalt, for example CuBe2, CuBe2Co, copper-titanium alloy with approximately 1 to 6% by weight of Ti, are preferred for the present purpose , for example CuTi4, copper-chromium alloys with up to 1% by weight of Cr, also with zirconia, for example CuCr, CuCrZr, copper-nickel-silicon alloys with approx. 1 - 5% by weight of Ni and up to 1.5% by weight.
  • -% silicon e.g. CuNi3Si, CuNi3Sil, copper-manganese-nickel alloys with about 20% by weight of Mn and 20% by weight of Ni, for example CuMn20Ni20 and the like.
  • the duration of the treatment is generally 5 to 120 minutes or more.
  • the abrasive particles as previously defined, or mixtures thereof are embedded in a known manner. This can be done, for example, by sintering, hot pressing (pressure sintering) or by another suitable method.
  • Diamond is in the foreground as an embedded, abrasive particle. However, other hard materials can also be incorporated.
  • the invention also relates to abrasive substances, namely matrices containing diamond embedded, that is to say cutting and separating elements of this type, and tools equipped with such cutting and separating elements, the cutting and separating elements being able to be produced by one of the abovementioned use methods.
  • the hardened matrix materials can have hardnesses of, for example, 100 HV up to the range of, for example, 350 HV or even more.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Earth Drilling (AREA)

Abstract

For producing shaped objects for drilling and cutting purposes, a matrix material with abrasive particles incorporated therein is used. The matrix material is based on a copper alloy which is aged in a range from 200 DEG to 600 DEG C. This makes it possible to produce shaped objects meeting the requirements of a particular application by using a single matrix material.

Description

Für das vibrationsfreie Bohren und Schneiden in natürlichem Gestein, wie Felsformationen oder in Baustoffen, wie Beton und Ziegel werden Werkzeuge benutzt, deren Schneiden mit Hartstoffen wie Karbiden, Nitriden, Karbid-Nitrid-Mischphasen, Diamant und ähnlichen besetzt sind. Als Hartstoffe werden häufig Stoffe wie natürlicher, synthetischer oder polykristalliner Diamant, B₄C, SiC, TiC, BN, TiN, Al₂0₃, Zr0₂, Hartmetall usw. verwendet. Dabei werden meist Diamant oder Hartmetall für Beton und Hartgestein-Bearbeitung, für weichere Baustoffe SiC, Al₂0₃ usw. eingesetzt. Häufig sind die abrasiv wirkenden feinen Partikel dieser Materialien in eine Matrix eingebettet. Diese abrasive Teilchen enthaltenden Matrizes werden nachfolgend, unabhängig davon, ob sie auf Trägern wie Bohrschäften, Scheiben und dergleichen angeordnet sind oder auch nicht, als Schneid- und Bohrelemente bezeichnet. Die Schneid- und Bohrelemente können je nach dem Schneid- bzw. Bohrzweck unterschiedliche Formen aufweisen. Z.B. die Form von Hohlbohrkronen, von Ringen, Stiften, Platten, Segmenten und anderen einfachen und komplexen Formkörpern, bei Trennscheiben zB Segment-, Ring- oder Scheibenform, die Form von Bohr-Schneidköpfen, Platten, Zylindern und dergleichen.Tools are used for the vibration-free drilling and cutting in natural rock, such as rock formations or in building materials, such as concrete and brick, the cutting of which is filled with hard materials such as carbides, nitrides, carbide-nitride mixed phases, diamond and the like. Materials such as natural, synthetic or polycrystalline diamond, B₄C, SiC, TiC, BN, TiN, Al₂0₃, Zr0₂, hard metal etc. are often used as hard materials. Mostly diamond or hard metal are used for concrete and hard rock processing, for softer building materials SiC, Al₂0₃ etc. The abrasive fine particles of these materials are often embedded in a matrix. These matrices containing abrasive particles are hereinafter referred to as cutting and drilling elements, regardless of whether they are arranged on supports such as drill shafts, disks and the like or not. The cutting and drilling elements can have different shapes depending on the cutting or drilling purpose. E.g. the shape of hollow drill bits, of rings, pins, plates, segments and other simple and complex shaped bodies, in the case of cutting discs, for example segment, ring or disc shape, the shape of drilling cutting heads, plates, cylinders and the like.

Die Matrixwerkstoffe sind ebenso wie die darin eingelagerten, abrasiven Partikel bzw. Teile einem Verschleissprozess unterworfen, wobei der Verschleiss von den jeweiligen Bearbeitungsbedingungen, namentlich der Härte des zu schneidenden oder zu bohrenden Materials abhängt. Um nun die Bohrwerkzeuge und damit vor allen Dingen die Schneid- und Bohrelemente den Anforderngen unterschiedlicher Verwendungszwecke anzupassen, wäre eine Vielzahl unterschiedlicher Matrixwerkstoffe erforderlich. Dies ist für die Praxis aus naheliegenden Gründen wenig wünschenswert und kaum durchführbar. Die Suche nach einem universell brauchbaren Matrixwerkstoff blieb, bisher insbesondere auch bei Berücksichtigung wirtschaftlicher Gesichtspunkte, ohne Erfolg.The matrix materials, like the abrasive particles or parts embedded therein, are subjected to a wear process, the wear depending on the respective processing conditions, namely the hardness of the material to be cut or drilled. In order to adapt the drilling tools and, above all, the cutting and drilling elements to the requirements of different uses, a large number of different matrix materials would be required. For obvious reasons, this is not desirable in practice and is hardly feasible. The search for a universally usable matrix material has so far been unsuccessful, especially when considering economic aspects.

Überraschenderweise wurde nun eine Lösung gefunden, die das Problem mit einem Matrix-Werkstoff einheitlicher stofflicher Zusammensetzung löst.Surprisingly, a solution has now been found that solves the problem with a matrix material with a uniform material composition.

Die erfindungsgemässe Lösung besteht in der Verwendung von durch Auslagerung auf verschiedene Härten bzw. Festigkeiten härtbaren Kupferlegierungen als Matrizes zur Herstellung von in der Matrix mit abrasiven Teilchen beladenen Formkörpern als Bohr- und Schneidelemente für Bohr- und Schneidzwecke.The solution according to the invention consists in the use of copper alloys which can be hardened by aging to different hardnesses or strengths as matrices for the production of shaped bodies loaded with abrasive particles in the matrix as drilling and cutting elements for drilling and cutting purposes.

Der besondere Vorteil dieser Lösung besteht darin, dass durch Verwendung von nur einer Cu-Legierung auf der Hersteller-, gegebenenfalls auch Verwenderseite durch eine dem spezifischen Verwendungszweck angepasste Wärmebehandlung, namentlich isotherme Alterung, also Auslagerung, mit abrasiven Teilchen besetzte Matrixwerkstoffe mit der jeweils erforderlichen Härte herstellbar sind. Auf diesem Weg gelingt es, unter Verwendung einer einzigen Matrix-Zusammensetzung den jeweiligen Anwendungserfordernissen entsprechende Schneid-Bohrelemente herzustellen bzw. bereitzuhalten. Die Formkörper können von der eingangs beispielhaft beschriebenen Art sein.The particular advantage of this solution is that by using only one Cu alloy on the manufacturer side, and possibly also on the user side, by means of a heat treatment adapted to the specific application, namely isothermal aging, i.e. aging, matrix materials with abrasive particles and the required hardness are producible. In this way, it is possible to manufacture or keep ready cutting drilling elements corresponding to the respective application requirements using a single matrix composition. The moldings can be of the type described by way of example at the beginning.

Die Einstellung unterschiedlicher Härten und Festigkeiten bei Kupferlegierungen durch Auslagerung ist bekannt (Heubner und Wassermann, Z. Metallkunde, 1962, 152; Werkstoffhandbuch Nichteisenmetalle, VDI-Verlag; Niedriglegierte Kupferlegierungen, Deutsches Kupferinstitut; Non-Ferrous Metals and Alloys, V. Sedlacek, Verlag Elsevier; U. Zwickler, Z. Metallkunde, 1962, S. 709: Untersuchungen über das Ausscheidungsverhalten übersättigter Kupfer-Titan-Mischkristalle). Bevorzugt für den vorliegenden Verwendungszweck sind insbesondere Kupferlegierungen wie Kupfer-Berylliumlegierungen mit ca. 1 bis 2 Gew.-% Be, auch mit geringen Anteilen, Kobalt, z.B. CuBe2, CuBe2Co, Kupfer-Titanlegierung mit ca. 1 bis 6 Gew.-% Ti, z.B. CuTi4, Kupfer-Chromlegierungen mit bis zu 1 Gew.-% Cr, auch mit Anteilen Zirkon, zB CuCr, CuCrZr, Kupfer-Nickel-Siliziumlegierungen mit ca 1 - 5 Gew.-% Ni und bis zu 1,5 Gew.-% Silizium, zB CuNi3Si, CuNi3Sil, Kupfer-Mangan-Nickellegierungen mit ca. 20 Gew.-% Mn und 20 Gew.-% Ni, zB CuMn20Ni20 und dergleichen.The setting of different hardnesses and strengths in copper alloys by aging is known (Heubner and Wassermann, Z. Metallkunde, 1962, 152; Materials Manual Non-Ferrous Metals, VDI-Verlag; Low-Alloy Copper Alloys, German Copper Institute; Non-Ferrous Metals and Alloys, V. Sedlacek, Verlag Elsevier; U. Zwickler, Z. Metallkunde, 1962, p. 709: Studies on the precipitation behavior of supersaturated copper-titanium mixed crystals). Copper alloys such as copper-beryllium alloys with approximately 1 to 2% by weight of Be, also with small proportions, cobalt, for example CuBe2, CuBe2Co, copper-titanium alloy with approximately 1 to 6% by weight of Ti, are preferred for the present purpose , for example CuTi4, copper-chromium alloys with up to 1% by weight of Cr, also with zirconia, for example CuCr, CuCrZr, copper-nickel-silicon alloys with approx. 1 - 5% by weight of Ni and up to 1.5% by weight. -% silicon, e.g. CuNi3Si, CuNi3Sil, copper-manganese-nickel alloys with about 20% by weight of Mn and 20% by weight of Ni, for example CuMn20Ni20 and the like.

Für die Auslagerung, also die isothermische Alterung, werden Temperaturen im Bereich von 200 bis 600°C, insbesondere 300 bis 550°C bevorzugt. Die Dauer der Behandlung beträgt im allgemeinen 5 bis 120 Minuten oder auch mehr.Temperatures in the range from 200 to 600 ° C., in particular 300 to 550 ° C., are preferred for aging, that is to say isothermal aging. The duration of the treatment is generally 5 to 120 minutes or more.

Die Einbettung der abrasiven Teilchen, wie zuvor definiert, oder von Gemischen hiervon erfolgt in bekannter Weise. Dies kann zB durch Sintern, Heisspressen (Drucksintern) oder durch ein anderes hierfür geeignetes Verfahren geschehen.The abrasive particles, as previously defined, or mixtures thereof are embedded in a known manner. This can be done, for example, by sintering, hot pressing (pressure sintering) or by another suitable method.

Als eingelagertes, abrasives Teilchen steht Diamant im Vordergrund. Es können jedoch auch andere Hartstoffe eingelagert sein.Diamond is in the foreground as an embedded, abrasive particle. However, other hard materials can also be incorporated.

Gegenstand der Erfindung sind auch abrasive Stoffe, namentlich Diamant eingebettet enthaltende Matrizes, also derartige Schneid- und Trennelemente, sowie mit solchen Schneid- und Trennelementen bestückte Werkzeuge, wobei die Schneid- und Trennelemente herstellbar sind nach einem der vorgenannten Verwendungsverfahren.The invention also relates to abrasive substances, namely matrices containing diamond embedded, that is to say cutting and separating elements of this type, and tools equipped with such cutting and separating elements, the cutting and separating elements being able to be produced by one of the abovementioned use methods.

Die gehärteten Matrixwerkstoffe können Härten von beispielsweise 100 HV bis in den Bereich von beispielsweise 350 HV oder sogar mehr aufweisen.The hardened matrix materials can have hardnesses of, for example, 100 HV up to the range of, for example, 350 HV or even more.

Die nachfolgenden Beispiele dienen der Erläuterung der Erfindung:The following examples serve to explain the invention:

Beispiel 1example 1 Fertigungsablauf:Manufacturing process: HeisspressenHot presses

  • 1. Pulvermischen:
    Matrixwerkstoff CuTi₄-Pulver mit Diamanten als Hartstoff    1. Powder mixing:
    Matrix material CuTi₄ powder with diamonds as hard material
  • 2. Heisspressen: (Drucksintern)
    - Druck:
    ca. 200 - 300 bar
    - Temperatur:
    ca. 750° - 850°C
    2. Hot pressing: (pressure sintering)
    - Print:
    approx. 200 - 300 bar
    - temperature:
    approx. 750 ° - 850 ° C
  • 3. Ausscheidungshärten:
    • Lösungsglühen: ca. 700° - 1000°C, ca. 10 bis 60 min.
    • Dieser Vorgang kann mit dem Heisspressprozess durchgeführt werden.
    • Auslagern: Je nach dem Matrixwerkstoff muss der Temperatur-Zeitverlauf gewählt werden - ca. 200° - 600°C / 5 - 120 min.
      CuTi4
      Variante 1:
      550°C, 10 min --> 300 HV (Härte)
      Variante 2:
      360°C, 10 min --> 200 HV
    3. Precipitation hardness:
    • Solution annealing: approx. 700 ° - 1000 ° C, approx. 10 to 60 min.
    • This process can be carried out with the hot pressing process.
    • Outsourcing: Depending on the matrix material, the temperature-time curve must be selected - approx. 200 ° - 600 ° C / 5 - 120 min.
      CuTi4
      Version 1:
      550 ° C, 10 min -> 300 HV (hardness)
      Variant 2:
      360 ° C, 10 min -> 200 HV
Beispiel 2Example 2 Fertigungsablauf:Manufacturing process: Konventionelle SintertechnikConventional sintering technology

  • 1. Pulvermischen:
    Matrixwerkstoff CuTi4-Pulver mit Diamanten als Hartstoffe und Gleitmittelzugabe (Presshilfsmittel)    1. Powder mixing:
    Matrix material CuTi4 powder with diamonds as hard materials and lubricant addition (pressing aid)
  • 2. Kaltpressen:
    • Füllen der Form
    • Pressen (ca 4 - 7 t/cm2)
    • Freilegen des Grünlings
    2. Cold pressing:
    • Filling the form
    • Presses (approx. 4 - 7 t / cm 2)
    • Expose the green body
  • 3. Sintern:
    Zwischen 800 und 1200°C im Vakuum- oder Schutzgasofen    3. Sintering:
    Between 800 and 1200 ° C in a vacuum or inert gas oven
  • 4. Ausscheidungshärten:
    • Lösungsglühen: 700 bis 1000°C, ca 10 bis 60 min.
      Dieser Vorgang kann mit dem Sinterprozess durchgeführt werden.
    • Auslagern: Je nach dem Matrixwerkstoff muss die Temperatur/Zeit gewählt werden
      CuTi₄
      Variante 1:
      550°C, 10 min --> 300 HV (Härte)
      Variante 2:
      360°C, 10 min --> 200 HV (Literaturangaben)
    4. Precipitation hardness:
    • Solution annealing: 700 to 1000 ° C, approx. 10 to 60 min.
      This process can be carried out with the sintering process.
    • Outsourcing: Depending on the matrix material, the temperature / time must be selected
      CuTi₄
      Version 1:
      550 ° C, 10 min -> 300 HV (hardness)
      Variant 2:
      360 ° C, 10 min -> 200 HV (references)

Claims (4)

Verwendung von durch Auslagerung härtbaren Cu-Legierungen als Matrixwerkstoff zur Herstellung von im Matrixwerkstoff abrasiven Teilchen aufweisenden Formkörpem für Bohr- und Schneidzwecke.Use of age-hardenable Cu alloys as matrix material for the production of molded articles with abrasive particles in the matrix material for drilling and cutting purposes. Verwendung gemäss Patentanspruch 1, dadurch gekennzeichnet, dass als Kupferlegierungen Legierungen der Zusammensetzung Cu-Ti mit 1 bis 6 Gew.-% Titan, Cu-Be mit 1 bis 2 Gew.-% Be und gegebenenfalls geringen Anteilen Kobalt, Cu-Cr mit bis zu 1 Gew.-% Cr und gegebenenfalls Anteilen an Zirkon, Cu-Ni-Si mit 1 bis 5 Gew.-% Ni und bis zu 1,5 Gew.-% Si oder Cu-Mn-Ni mit ca. 20 Gew.-% Mn und 20 Gew.-% Ni verwendet werden.Use according to claim 1, characterized in that as copper alloys alloys of the composition Cu-Ti with 1 to 6% by weight of titanium, Cu-Be with 1 to 2% by weight of Be and optionally small proportions of cobalt, Cu-Cr with to 1% by weight of Cr and optionally proportions of zirconium, Cu-Ni-Si with 1 to 5% by weight of Ni and up to 1.5% by weight of Si or Cu-Mn-Ni with approx. 20% by weight. -% Mn and 20 wt .-% Ni can be used. Verwendung gemäss einem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, dass die Auslagerungen im Bereich von 200° bis 600°C erfolgen.Use according to one of the preceding claims, characterized in that the aging takes place in the range from 200 ° to 600 ° C. Formkörper als Elemente für Bohr- und Schneidzwecke mit einer abrasive Teilchen enthaltenden, gehärteten Cu-Legierungs-Matrix, herstellbar nach einem Verwendungsverfahren gemäss einem der vorhergehenden Patentansprüche.Shaped bodies as elements for drilling and cutting purposes with a hardened Cu alloy matrix containing abrasive particles, producible by a use method according to one of the preceding claims.
EP91810761A 1990-10-19 1991-09-27 Cutting and drilling elements Expired - Lifetime EP0481917B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4033214 1990-10-19
DE4033214A DE4033214A1 (en) 1990-10-19 1990-10-19 CUTTING AND DRILLING ELEMENTS

Publications (2)

Publication Number Publication Date
EP0481917A1 true EP0481917A1 (en) 1992-04-22
EP0481917B1 EP0481917B1 (en) 1996-06-05

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EP91810761A Expired - Lifetime EP0481917B1 (en) 1990-10-19 1991-09-27 Cutting and drilling elements

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US (1) US5186724A (en)
EP (1) EP0481917B1 (en)
DE (2) DE4033214A1 (en)
DK (1) DK0481917T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0826758A1 (en) * 1996-09-03 1998-03-04 HILTI Aktiengesellschaft Composite cutting element containing diamond particles and method for its preparation
WO1998010110A1 (en) * 1996-09-04 1998-03-12 Amic Industries Limited Manufacture of a metal bonded abrasive product

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT7492U1 (en) * 2004-06-01 2005-04-25 Ceratizit Austria Gmbh WEAR PART OF A DIAMOND-CONTAINING COMPOSITE
CN101879597B (en) * 2010-06-11 2011-12-07 西安交通大学 Preparation method of metal sintering-type diamond saw cutter for cutting QFN (Quad Flat Non-Leaded Package) packaging device

Citations (3)

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Publication number Priority date Publication date Assignee Title
GB652086A (en) * 1948-12-14 1951-04-18 George Sidney Chapman Improvements in or relating to the production of tools
GB1268917A (en) * 1969-11-12 1972-03-29 Inst Elektroswarki Patona A method of providing a wear-resistant surface on parts or blanks
EP0360438A1 (en) * 1988-08-30 1990-03-28 Sutek Corporation Dispersion strengthened materials

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US3496682A (en) * 1964-05-05 1970-02-24 Eutectic Welding Alloys Composition for producing cutting and/or wearing surfaces
DE3372267D1 (en) * 1982-03-31 1987-08-06 De Beers Ind Diamond Abrasive bodies
US4655795A (en) * 1983-02-28 1987-04-07 Ex-Cell-O Corporation Abrasive tool for honing
US4923490A (en) * 1988-12-16 1990-05-08 General Electric Company Novel grinding wheels utilizing polycrystalline diamond or cubic boron nitride grit
US4968326A (en) * 1989-10-10 1990-11-06 Wiand Ronald C Method of brazing of diamond to substrate

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB652086A (en) * 1948-12-14 1951-04-18 George Sidney Chapman Improvements in or relating to the production of tools
GB1268917A (en) * 1969-11-12 1972-03-29 Inst Elektroswarki Patona A method of providing a wear-resistant surface on parts or blanks
EP0360438A1 (en) * 1988-08-30 1990-03-28 Sutek Corporation Dispersion strengthened materials

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 83 (M-802)(3431) 27. Februar 1989 & JP-A-63 281 797 ( HITACHI METALS LTD ) 18. November 1988 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0826758A1 (en) * 1996-09-03 1998-03-04 HILTI Aktiengesellschaft Composite cutting element containing diamond particles and method for its preparation
US6176888B1 (en) 1996-09-03 2001-01-23 Hilti Aktiengesellschaft Composite cutting body, containing diamond particles and methods for its production
WO1998010110A1 (en) * 1996-09-04 1998-03-12 Amic Industries Limited Manufacture of a metal bonded abrasive product

Also Published As

Publication number Publication date
DE59107887D1 (en) 1996-07-11
US5186724A (en) 1993-02-16
DE4033214A1 (en) 1992-04-23
EP0481917B1 (en) 1996-06-05
DK0481917T3 (en) 1996-10-21

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