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EP0659507B1 - Poudre métallique de cobalt ainsi que produit composite fritte obtenu avec cette poudre - Google Patents

Poudre métallique de cobalt ainsi que produit composite fritte obtenu avec cette poudre Download PDF

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Publication number
EP0659507B1
EP0659507B1 EP94119399A EP94119399A EP0659507B1 EP 0659507 B1 EP0659507 B1 EP 0659507B1 EP 94119399 A EP94119399 A EP 94119399A EP 94119399 A EP94119399 A EP 94119399A EP 0659507 B1 EP0659507 B1 EP 0659507B1
Authority
EP
European Patent Office
Prior art keywords
metal powder
cobalt metal
cobalt
ppm
atomised
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.)
Expired - Lifetime
Application number
EP94119399A
Other languages
German (de)
English (en)
Other versions
EP0659507A1 (fr
Inventor
Matthias Dr. Höhne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HC Starck GmbH
Original Assignee
HC Starck GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HC Starck GmbH filed Critical HC Starck GmbH
Publication of EP0659507A1 publication Critical patent/EP0659507A1/fr
Application granted granted Critical
Publication of EP0659507B1 publication Critical patent/EP0659507B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/05—Metallic powder characterised by the size or surface area of the particles
    • B22F1/052—Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12049—Nonmetal component
    • Y10T428/12056—Entirely inorganic
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12931—Co-, Fe-, or Ni-base components, alternative to each other

Definitions

  • the present invention relates to cobalt metal powder as a binder metal for the Manufacture of diamond and / or hard metal tools and / or wear protection coatings and composite sintered bodies made therefrom.
  • JP-A 53-093 165 discloses the manufacture and use atomize Cobalt metal.
  • the cobalt metal powder is produced by grinding processes not only more expensive, but also contaminated.
  • Cobalt metal powders can be produced quite cheaply by atomization from the melt are produced, but these powders are available as binder metals, e.g. for the Manufacture of diamond tools completely unsuitable because of the spheroidal grain shape and grain size at the usual sintering temperatures between 800-900 ° C no dense composite sintered parts from result in sufficient hardness.
  • the main reason for the inadequate performance properties of hot-pressed composite sintered bodies made of atomized cobalt metal powder is the lack of compressibility of the pre-pressed shaped bodies due to the spheroidal grain shape, the relatively narrow grain size distribution and the coarse primary particles (FIG. 2).
  • the necessary density of at least 8.5 g / cm 3 is also not achieved by hot pressing.
  • Cobalt metal powder with an FSSS value of 3 to 5 ⁇ m so-called 400 mesh powder (Fig. 1) available. This designation is explained by the sieve passage this powder through a 400 mesh sieve.
  • Such powders meet requirements that of the matrix metal for composite materials in terms of hardness and sintered density be put.
  • the so-called 400-mesh powders are quite right high level of impurities. It is generally known that Aluminum, calcium, sodium, magnesium and silicon easily with the oxygen form stable oxides of the cobalt metal powder. These can be in diamond segments cause undesirable porosity.
  • Porosity can reduce the strength of hard metals, if the above impurities as well as sulfur in too high Amounts are included. Cobalt metal powder is therefore used in both applications low levels of impurities are desirable. Depending on the cleaning effort in the metallurgical precursors, the purity of the cobalt metal powder be adapted to requirements. The effort for the production Particularly pure cobalt metal powder is naturally expensive and such Powders are therefore very expensive.
  • This invention relates to a cobalt metal powder Binder metal for the production of diamond and / or hard metal tools and / or wear protection coatings, which is characterized by that it is 20 to 80 wt .-% of an atomized cobalt metal powder with optical determined grain sizes from 5 to 150 microns and the rest missing to 100 wt .-% from an optionally agglomerated cobalt metal powder optically determined primary size of less than 3 microns exists.
  • the cobalt metal powder according to the invention has the price advantage of Oxides or oxygen-containing compounds by reduction of cobalt metal powder obtained on, but contains significantly smaller amounts of the above critical contaminants. It preferably contains less than 20 ppm Al, 20 ppm Ca, 30 ppm Na, 20 ppm Mg, 30 ppm S and 75 ppm Si.
  • the cobalt metal powder according to the invention is a Mixing of atomized cobalt metal powder with fine cobalt powder from the Hydrogen reduction.
  • the amount of atomized cobalt metal powder is preferably 30 to 70% by weight.
  • the atomized cobalt metal powder is both a water atomized cobalt metal powder with predominantly spheroidal habit as well as a gas atomized Cobalt metal powder with spheroidal habit suitable.
  • the cobalt metal powder with a crystalline structure preferably has BET surface areas, determined by the nitrogen 1-point method (DIN 66 131), of greater than 0.8 m 2 / g.
  • the cobalt metal powder according to the invention has a bulk density of less than 1.4 kg / cm 3 .
  • the cobalt metal powder according to the invention is outstandingly suitable for powder metallurgy Manufacture of diamond tools and / or hard metals, in which the cobalt - optionally together with other customary matrix metals - represents the binder phase.
  • Example 1 (mixture 70/30)
  • Fig. 4 clearly shows that large round cobalt particles in addition to fine primary crystals have been preserved in the polished and etched sample.
  • a fine cobalt metal powder obtained from the reduction of cobalt hydroxide with an average grain size of 0.9 ⁇ m, a BET value of 1.85 m 2 / g, sieved through a 100 ⁇ m sieve (bulk density 0.8 g / cm 3 ), was sieved with 0.5 kg of a water-atomized cobalt metal powder (11.7 ⁇ m FSSS) with a BET value of 0.73 m 2 / g, through a 38 ⁇ m sieve (bulk density 3.3 g / cm 3 ), mixed in a "Turbula mixer" for 15 minutes.
  • the resulting mixture had an FSSS value of 1.5 ⁇ m FSSS, a BET value of 1.06 m 2 / g with a bulk density of 0.8 g / cm 3 .
  • a hardness of HR B 100.4 and a density of 8.5 g / cm 3 were measured from a hot-pressed sample plate according to Example 1.
  • Comparative Example 1 (100% water-atomized cobalt metal powder ⁇ 63 ⁇ m):
  • the atomized cobalt metal powder achieve the required minimum density of 8.5 g / cm 3 and the minimum hardness of 98 HRB.
  • Example 5 (100% water-atomized cobalt metal powder ⁇ 38 ⁇ m):
  • Table 1 summarizes the data from Examples 1 to 3 and the comparative data for the 400-mesh cobalt powder and the atomized powder (according to the prior art).
  • Example 5 Mixture from example 1 (70/30) Mixture from example 2 (60/40) Mixture from example 3 (50/50) Co 400 mesh St.dT 830 8.1 g / cm 3 8.54 g / cm 3 8.54 g / cm 3 8.5 g / cm 3 8.45 80 HR B 101.6 HR B 101.2 HR B 100 HR B 97.7 HR B
  • Impurities 400-mesh cobalt 400-mesh cobalt metal powder ("Cobalt Powder 400-mesh” from Hoboken Overpelt, Belgium)) and mixtures according to Examples 1, 2 and 3 according to the invention: Impurities 400 mesh-Co (100/0) Mixture example 1 (70/30) Mixture example 2 (60/40) Mixture example 3 (50/50) Al (ppm) 180 6 7 6 Ca (ppm) 320 12th 12th 13 Na (ppm) 55 25th 22 9 Mg (ppm) 150 8th 8th 3rd S (ppm) 140 13 14 15 Si (ppm) 310 34 36 41

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Claims (9)

  1. Poudre de cobalt métallique en tant que métal de liaison pour la production d'outils diamantés et/ou d'outils en alliage dur et/ou de revêtements de protection contre l'usure, caractérisée en ce qu'elle est constituée de 20 à 80 % en masse d'une poudre de cobalt métallique atomisée ayant une grosseur de grains, déterminée par un moyen optique, de 5 à 150 µm, et du complément à 100 % d'une poudre de cobalt métallique, se trouvant éventuellement sous forme agglomérée, ayant une grosseur de particules primaires, déterminée par un moyen optique, inférieure à 3 µm.
  2. Poudre de cobalt métallique selon la revendication 1, caractérisée en ce que la quantité de poudre de cobalt métallique atomisée est comprise entre 30 et 70 % en masse.
  3. Poudre de cobalt métallique selon les revendications 1 ou 2, caractérisée en ce que la poudre de cobalt métallique à structure cristalline a une surface BET, mesurée par la méthode à l'azote à 1 point (DIN 66131), supérieure à 0,8 m2/g.
  4. Poudre de cobalt métallique selon l'une ou plusieurs des revendications 1 à 3, caractérisée en ce que la poudre de cobalt métallique atomisée est une poudre de cobalt métallique obtenue par atomisation aqueuse et ayant un faciès cristallin principalement sphéroïde.
  5. Poudre de cobalt métallique selon l'une ou plusieurs des revendications 1 à 3, caractérisée en ce que la poudre de cobalt métallique atomisée est une poudre de cobalt métallique obtenue par atomisation gazeuse et ayant un faciès cristallin sphéroïde.
  6. Poudre de cobalt métallique selon l'une ou plusieurs des revendications 1 à 5, caractérisée en ce qu'elle a une masse volumique apparente inférieure à 1,4 g/cm3.
  7. Poudre de cobalt métallique selon l'une ou plusieurs des revendications 1 à 6, caractérisée en ce qu'elle contient moins de 20 ppm d'aluminium, 20 ppm de calcium, 30 ppm de sodium, 20 ppm de magnésium, 30 ppm de soufre et 75 ppm de silicium.
  8. Poudre de cobalt métallique selon l'une ou plusieurs des revendications 1 à 7, caractérisée en ce qu'elle a une dureté Rockwell, mesurée sur des plaquettes d'essai comprimées à chaud, d'an moins 98 HRB.
  9. Corps fritté composite, produit à partir de poudres de substances dures et/ou de poudre de diamant et de métaux de liaison, dans lequel on utilise comme métal de liaison, éventuellement avec d'autres poudres métalliques, la poudre de cobalt métallique selon l'une ou plusieurs des revendications 1 à 6.
EP94119399A 1993-12-21 1994-12-08 Poudre métallique de cobalt ainsi que produit composite fritte obtenu avec cette poudre Expired - Lifetime EP0659507B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4343594 1993-12-21
DE4343594A DE4343594C1 (de) 1993-12-21 1993-12-21 Kobaltmetallpulver sowie daraus hergestellte Verbundsinterkörper

Publications (2)

Publication Number Publication Date
EP0659507A1 EP0659507A1 (fr) 1995-06-28
EP0659507B1 true EP0659507B1 (fr) 1998-07-08

Family

ID=6505607

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94119399A Expired - Lifetime EP0659507B1 (fr) 1993-12-21 1994-12-08 Poudre métallique de cobalt ainsi que produit composite fritte obtenu avec cette poudre

Country Status (10)

Country Link
US (1) US5482530A (fr)
EP (1) EP0659507B1 (fr)
JP (1) JP3435660B2 (fr)
KR (1) KR100340161B1 (fr)
CN (1) CN1070094C (fr)
AT (1) ATE168054T1 (fr)
DE (2) DE4343594C1 (fr)
ES (1) ES2118304T3 (fr)
GR (1) GR3027693T3 (fr)
RU (1) RU2126310C1 (fr)

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DE19519331C1 (de) * 1995-05-26 1996-11-28 Starck H C Gmbh Co Kg Kobaltmetallagglomerate, Verfahren zu ihrer Herstellung sowie deren Verwendung
DE19519329C1 (de) * 1995-05-26 1996-11-28 Starck H C Gmbh Co Kg Kobaltmetallagglomerate, Verfahren zu ihrer Herstellung sowie deren Verwendung
DE19540076C1 (de) * 1995-10-27 1997-05-22 Starck H C Gmbh Co Kg Ultrafeines Kobaltmetallpulver, Verfahren zu seiner Herstellung sowie Verwendung des Kobaltmetallpulvers und des Kobaltcarbonates
DE19544107C1 (de) * 1995-11-27 1997-04-30 Starck H C Gmbh Co Kg Metallpulver-Granulat, Verfahren zu seiner Herstellung sowie dessen Verwendung
SE9703204L (sv) * 1997-09-05 1999-03-06 Sandvik Ab Verktyg för borrning/fräsning av kretskortsmaterial
US7344557B2 (en) * 2003-11-12 2008-03-18 Advanced Stent Technologies, Inc. Catheter balloon systems and methods
US7360991B2 (en) * 2004-06-09 2008-04-22 General Electric Company Methods and apparatus for fabricating gas turbine engines
US7470307B2 (en) * 2005-03-29 2008-12-30 Climax Engineered Materials, Llc Metal powders and methods for producing the same
WO2007055616A1 (fr) 2005-11-14 2007-05-18 Evgeny Aleksandrovich Levashov Liant pour la fabrication d’outils diamantés
WO2009068154A2 (fr) * 2007-11-26 2009-06-04 Umicore Poudre de co thermiquement stable
US8197885B2 (en) * 2008-01-11 2012-06-12 Climax Engineered Materials, Llc Methods for producing sodium/molybdenum power compacts
RU2428494C1 (ru) * 2009-12-28 2011-09-10 Государственное образовательное учреждение высшего профессионального образования "Кемеровский государственный университет" (КемГУ) Наноструктурированный агломерат металлического кобальта и способ его получения
CN102728832B (zh) * 2012-07-30 2016-12-21 河北航华金刚石制品有限公司 钴粉包覆金刚石颗粒的工艺
CN116900312A (zh) * 2023-07-20 2023-10-20 河南四方达超硬材料股份有限公司 聚晶金刚石坯体的制备方法、聚晶金刚石的制备方法

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Also Published As

Publication number Publication date
DE59406412D1 (de) 1998-08-13
GR3027693T3 (en) 1998-11-30
JPH07207301A (ja) 1995-08-08
KR950017006A (ko) 1995-07-20
DE4343594C1 (de) 1995-02-02
ES2118304T3 (es) 1998-09-16
JP3435660B2 (ja) 2003-08-11
ATE168054T1 (de) 1998-07-15
US5482530A (en) 1996-01-09
CN1070094C (zh) 2001-08-29
CN1112466A (zh) 1995-11-29
RU94045279A (ru) 1997-04-20
KR100340161B1 (ko) 2002-10-31
EP0659507A1 (fr) 1995-06-28
RU2126310C1 (ru) 1999-02-20

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