EP1153150B1 - Procede pour produire des melanges de metaux durs - Google Patents

Procede pour produire des melanges de metaux durs Download PDF

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Publication number
EP1153150B1
EP1153150B1 EP00904876A EP00904876A EP1153150B1 EP 1153150 B1 EP1153150 B1 EP 1153150B1 EP 00904876 A EP00904876 A EP 00904876A EP 00904876 A EP00904876 A EP 00904876A EP 1153150 B1 EP1153150 B1 EP 1153150B1
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EP
European Patent Office
Prior art keywords
mix
mixing
process according
powder
mixed
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Expired - Lifetime
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EP00904876A
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German (de)
English (en)
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EP1153150A1 (fr
Inventor
Benno Gries
Jörg Bredthauer
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HC Starck GmbH
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HC Starck GmbH
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Publication of EP1153150A1 publication Critical patent/EP1153150A1/fr
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B01F29/60—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers
    • B01F29/64—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers with stirring devices moving in relation to the receptacle, e.g. rotating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/86—Mixing heads comprising a driven stirrer
    • B01F33/862—Mixing heads comprising a driven stirrer the stirrer being provided with a surrounding stator
    • 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
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B01F29/40—Parts or components, e.g. receptacles, feeding or discharging means
    • B01F29/403—Disposition of the rotor axis
    • B01F29/4033—Disposition of the rotor axis inclined
    • 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
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]

Definitions

  • Hard metals are materials made from hard materials and binder metals. They have meaning as wear-resistant materials and are of cutting and non-cutting shape accessible.
  • Hard materials are carbides or nitrides or carbonitrides of the refractory metals of the IV. V. and VI. Subgroup of the Periodic Table of the Elements, with titanium carbide (TiC), titanium carbonitride (Ti (C, N)) and especially tungsten carbide (WC) the largest Have gained importance.
  • TiC titanium carbide
  • Ti (C, N) titanium carbonitride
  • WC tungsten carbide
  • Cobalt is used in particular as binder metal. However, however also mixed metal powder or alloy powder made of cobalt, nickel and iron as well if necessary, further ingredients used in minor amounts.
  • Binder metal For the production of hard metals, hard materials and binder metal, each in Powder form, intimately mixed, pressed and then sintered, the Binder metal by forming a melt during sintering is a very extensive densification and the construction of a multi-phase structure with more favorable Bending strength and fracture toughness should enable.
  • the effect of Binder metal is optimal when complete wetting of the hard material phase is achieved, the solubility of the hard material depending on the sintering temperature causes a partial redissolution and rearrangement of the hard material in the binder, so that a microstructure structure is achieved which has a large crack propagation Opposed resistance.
  • the sintering result can be in the form of the residual porosity represent. In order to achieve sufficient fracture toughness, this is not the case a prerequisite for a certain residual porosity.
  • Hard materials are usually preferred with average particle sizes of 3 to 20 microns 3 to 10 ⁇ according to ASTM B 330 used. It should be very fine Hard material portions are avoided, as these are used during the liquid phase sintering Recrystallization (Ostwald ripening).
  • the crystallites grown in this way show multidimensional point defects, which for certain performance characteristics of the Carbide, especially in steel cutting, mining and striking tools are disadvantageous.
  • tungsten carbide can be made to a certain extent Plastic degrees deform when multi-dimensional point defects at high Temperatures above 1900 ° C can be cured. The carburizing temperature, at The tungsten carbide obtained is therefore essential for the performance properties of hard metal.
  • the one at sintering temperature typically between 1360 and 1450 ° C, redissolved portion of the tungsten carbide phase in the hard metal is in view qualitatively inferior to the unresolved portion on these performance characteristics.
  • a further embrittlement can occur in that grown up by redeployment WC shares may have incorporated binder metals in the lattice.
  • the binder metal is typically used with a smaller particle size, typically about 1 to 2 ⁇ according to ASTM B 330.
  • the binder metal is used in such an amount that it is about 3 to 25% by weight of the hard metal.
  • Hard metal mixtures i.e. the mixing of hard material and binder before sintering an outstanding role with regard to the later hard metal properties.
  • the wet grinding has taken place in the attritor or in a ball mill Using an organic grinding fluid and using grinding balls than the industrially used process for the production of hard metal mixtures enforced.
  • a grinding fluid By using a grinding fluid, the electrostatic Rejection forces additionally suppressed effectively. It succeeds through the wet mixed grinding in the attritor the grain crushing of the hard material in still keeping reasonable limits, however, the mixed grinding is a very complex Process that requires a large amount of space due to the required volume ratio from grinding media to grinding stock of about 6: 1 and on the other hand Meals take from 4 to 48 hours. There is also the requirement after the mixed grinding, the grinding balls of the hard metal mixture by sieving and the organic grinding liquid by evaporation.
  • a certain amount of grind and a certain size reduction is also with the to accept wet mixed grinding.
  • WC powders are particularly affected, that were carburized at at least 1900 ° C, narrow grain size distribution have no fines and therefore no redeployment in top quality Hard metals should be transferred.
  • the object of the present invention is to provide a method for producing hard metal mixtures specify which avoids the disadvantages of the prior art, is in particular technically less complex and moreover due to the Homogeneity of the mixture and the avoidance of grain crushing of the hard material after sintering hard metals with excellent performance properties by minimizing the redeemed portion of the WC phase.
  • the object is achieved by the method according to claim 1.
  • the object is achieved in that the mixing in Close range of the components of the mixture due to the generation of high shear impact speed the powder particles and in the far range by circulating the Mixed goods is carried out.
  • mixing in the close range is the mixing of a Part of the mix understood in itself, whereas long-range mixing the mixing of the bulk of the mix batch in itself, i.e. the Subsets among themselves, designated.
  • the method according to the invention therefore consists in the one hand in the short-range mixing with high input of mixed energy (based on that of the Mixing element detected amount of powder) to overcome the electrostatic repulsive forces the powder particles with each other and on the other hand with the mixing of mixing areas with low energy input to homogenize the powder mixture is mixed.
  • the majority of the mix is in the area of long-range mixing by circulating the mixture bed.
  • a Rotary tube for example, a Rotary tube, a ploughshare mixer, a paddle mixer or a cone screw mixer.
  • a subset of the mixture is in the area of short-range mixing, a mixing unit producing high mutual impact speeds.
  • Aggregates suitable for short-range mixing are in particular fast rotating mixing elements. Those with peripheral speeds are preferred according to the invention from 8 to 25 m / s, particularly preferably 12 to 18 m / s.
  • the mix is preferably at least in the area of short-range mixing fluidized in the gas atmosphere of the mixing container, the gas through the Mixing element is strongly swirled and the powder particles due to the in the vortex prevailing shear rates collide.
  • a suitable mixing element is, for example, a quick one with wall-mounted stirring blades running agitator, leaving a gap between the container wall and the agitator blade, the width of which is at least 50 times the particle diameter. The gap width is preferably 100 to 500 times the particle size.
  • aggregates that are also suitable for short-range mixing are made of US-A 3 348 779, US-A 4 747 550, EP-A 200 003, EP-A 474 102, the EP-A 645 179 and DE-U 29 515 434 under the name micro vortex mill known.
  • Such mills consist of a stator in the form of a cylindrical Housing in which a rotor is axially arranged, the one or more circular disks arranged one above the other on a common drivable axis has, the circular discs on their circumference a variety of im have grinding plates arranged essentially radially and parallel to the rotor axis, which protrude beyond the circular disks, with a gap between the stator and grinding plates remains, the "shear gap".
  • the rotor becomes too high speed of rotation driven, typically 1000 to 5000 U / Min., experienced in the micro vortex mill located gas-dispersed particles due to the imprinted on the gas Shear speed between rotor and stator high acceleration forces, see above that the particles collide while overcoming the electrostatic repulsive forces.
  • the particles impact there is a charge exchange or a dielectric recharge instead, so that the repulsive forces of the particles with each other stay lifted after the impact.
  • the shear gap between the rotor and the stator should preferably be a clear one Have width that is at least 50 times the average diameter of the Particle size with the larger mean diameter, i.e. the hard particles, equivalent. Preference is given to a shear gap with a clear width that is 100 to Corresponds to 500 times the average diameter of the hard material particles. typically, Accordingly, the shear gap can have a clear width of 0.5 to 5 mm, preferably 1 up to 3 mm.
  • the shear rate in the shear gap should be expressed as the ratio circumferential speed of the rotor and gap width at least 800 / s, are particularly preferably 1000 to 20,000 / s.
  • the dwell time in the short-range mixing is selected so that the Temperature of the powder mixture as it passes through the close-range mixture does not rise above 300 ° C.
  • Air that is mixed is preferably around a lower temperature Avoid oxidation of the powder particles safely.
  • the mixing in Protective gas atmosphere for example argon, takes place, where appropriate, temperatures permissible up to 500 °.
  • the dwell time is typically in the short-range mixing in seconds.
  • the total mixing time is preferably 30 to 90 minutes, particularly preferably more than 40 minutes, and more preferably less than 1 hour.
  • the powder mixture recirculated between short-range and long-range mixing i.e. subsets of the powder mixture are used as a continuous substream of the long-range mixing removed, added to the short-range mixing and back into the Long-range merging initiated.
  • the circulation speed of the powder mixture is preferably determined by the short-range mixing chosen so that on average during the total mixing time at least 5 passes, most preferably at least 10 passes each Powder particle is ensured by the short-range mixing.
  • the two powder components can or a raw mixture of the powder components continuously on one Be fed at the end of the circulation mixing unit and at the other end homogeneously mixed powder can be continuously discharged.
  • An alternative continuous implementation of the method is in one to produce a raw mixture of the powder components in the first circulation mixing unit, the raw mix continuously from the first circulation mixing unit remove, insert into the micro vortex mill, and then one to supply the second circulating mixing unit, it may be expedient afterwards to the second circulation mixing unit a further short-range mixing in a micro vortex mill and then another long range mixing in a circulating mixer.
  • the mix fluidized both in the short-range and in the long-range mixing includes, for example, a floor and wall accessible Rotor with shear gap to the container wall, the radial rotor blades against the Are vertical, so that the fluidized regrind in the container peripheral is promoted upwards and centrally promoted downwards.
  • the angle of attack is less than 25 °, particularly preferably 10 to 20 °.
  • the powder mixtures from the Additives used in the carbide industry such as organic adhesion promoters, oxidation inhibitors, Granule stabilizers and / or pressing aids, e.g. on paraffin or Polyethylene glycol base mixed together with the hard material and binder powder and distributed homogeneously.
  • the pressing aids melt due to the generated heat during the mixing process, so that a uniform surface coverage is effected. If the mixtures produced in this way are not yet sufficient A granulation step can have flowability or pressability downstream.
  • the hard metal mixtures according to the invention and their granules are for Production of hard metal moldings by axial pressing, isostatic pressing, Suitable for extrusion or injection molding and sintering.
  • Fig. 1 shows schematically a long-range mixer A in the two Powder P1 and P2 can be introduced continuously or discontinuously. From the Long-range mixing unit A is constantly a partial flow of the powder mixture in the Short-range mixing unit B transferred and returned to the family zone mixing unit A. The long-range mixing unit A finally becomes the finished one Powder mixture PM taken continuously or discontinuously.
  • Fig. 2 shows a particularly for the continuous execution of the invention Basic arrangement suitable for the method.
  • the powders P1 and P2 will be into a first long-range mixing unit, in particular, for example, a rotary tube introduced. You get out of the rotary tube into a first micro vortex mill B1 and are then transferred to a second long-range mixing unit A2. Possibly can a further short-range mixing B2 and a not shown Long range mixing A3 can be connected.
  • Fig. 3 shows an arrangement, in particular for batch batch mixing suitable is.
  • the micro vortex mill B is a short-range mixing element arranged within the zone mixing element A.
  • Fig. 4 shows the structure of a micro vortex mill 1.
  • This consists of a cylindrical housing 2, the inner wall of which forms the stator.
  • the inside wall of the cylindrical housing 2 can be covered with abrasion-resistant material.
  • an axis drivable for rotation is provided on the Axis 3 are one or more, in particular 2 to 5, drivable with the axis Circular disks 4.1, 4.2 and 4.3 are provided, each of which has a large number on its circumference have grinding plates 5.1, 5.2 and 5.3 arranged radially and parallel to axis 3.
  • the outer edges of the grinding plates 5.1, 5.2 and 5.3 form together with the Inner wall of the cylindrical housing 2 from the shear gap 6.
  • the micro-vortex mill also preferably has a conical cover 7, which is provided with openings 8 through which the free-flowing powder well into the cylindrical housing 2 trickles.
  • An additional circular disc with axis 3 9 can be provided as a distributor plate.
  • FIG Fig. 3 shows a device which can be used according to the invention, as shown schematically in FIG Fig. 3 is shown.
  • This consists of a mixing drum 10, which is connected via the axis 11 for rotation with low rotation speed, for example 1 to 2 revolutions per minute, can be driven.
  • the drum is due to the non-rotating Cover cap 12 closed.
  • the micro-vortex mill is located inside the drum 10 1, as shown in Fig. 4.
  • Within the drum 10 can also Baffles 13 may be arranged.
  • the filling level of the drum 10 is due to the dashed line 14 indicated.
  • the method according to the invention now consists in that the powder mixture continuously through the openings 8 in the micro vortex mill 1 occurs where the short-range mixing takes place, and through the below open cylinder is returned to the long-range mixing.
  • FIG. 6 shows a device that can be used according to the invention, in which the mixed material both for short-range mixing and for long-range mixing is fluidized.
  • the container 10 In the container 10 is located on a drivable axis 3 Floor and wall accessible rotor with 4 rotor blades 5a, 5b, 5c and 5d, which for Container wall form the shear gap 6.
  • Above the rotor 5 is a Opposed rotor 20 provided on the axis 3, its diameter corresponds to approximately half the container diameter.
  • the mix When the axis 3 rotates in the direction of the arrow 21, the mix is fluidized and in addition to rotation about axis 3 as circulated by arrow 22. A part of the fluidized mix enters the shear gap 6, where the high shear rate of the fluid cause a strong particle acceleration.
  • the samples are pressed and then sintered at 1380 ° C over 45 Minutes into carbide test specimens.
  • a corresponding powder mixture is used in a ball mill 20 Hours with hexane.
  • the comparison powder mixture becomes the same as a carbide test body made.
  • Example 11.9 kg of a cobalt metal powder with an average grain size of 1.5 ⁇ m and 122.4 kg of a slightly agglomerated tungsten carbide powder with a medium Grain size of 6 microns (FSSS, ASTM B 330) are mixed as in Example 1.
  • the Oxygen content before mixing is 0.058% by weight after 40 minutes Mixing time 0.109% by weight.
  • Example 2f a comparison mixture (Example 2f) in a ball mill as in Example 1 prepared.
  • FIG. 9 shows an SEM image of the starting tungsten carbide powder.
  • Fig. 10 shows the powder mixture after 30 minutes of mixing.
  • Example 11 shows the micrograph of a hard metal according to Example 2d).
  • the hard metal has a good structure and a good binder distribution.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Powder Metallurgy (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Carbon And Carbon Compounds (AREA)

Claims (10)

  1. Procédé pour produire un mélange homogène d'une matière à mélanger constituée par une substance dure en poudre et par un liant métallique en poudre, sans utiliser ni corps de broyage ni auxiliaires de broyage liquides ni agents de suspension, caractérisé en ce qu'une quantité partielle de la matière à mélanger est mélangée en elle-même en générant une vitesse d'impact élevée avec effet de cisaillement des particules en poudre dans un récipient équipé d'éléments de rotor et de stator et présentant un intervalle de cisaillement entre les éléments, et en ce que la quantité principale de la matière à mélanger est mélangée par brassage de la matière à mélanger.
  2. Procédé selon la revendication 1, caractérisé en ce que la quantité partielle de la matière à mélanger est fluidisée en elle-même lors du mélange, et en ce que la vitesse d'impact élevée est générée par tourbillonnement du fluide.
  3. Procédé selon la revendication 1, caractérisé en ce que l'intervalle de cisaillement présente une largeur intérieure qui est d'au moins 50 fois le diamètre moyen du type de particules présentant le plus grand diamètre moyen.
  4. Procédé selon la revendication 1, caractérisé en ce que le rapport entre la vitesse relative du rotor et du stator et la largeur de l'intervalle de cisaillement est d'au moins 800/s.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que le rotor présente une vitesse périphérique de 12 à 20 m/s.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que le mélange de la quantité principale de la matière à mélanger s'effectue dans un récipient agité comportant des éléments d'agitation en rotation lente.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que la matière à mélanger est fluidisée aussi bien lors du mélange de la quantité partielle en elle-même que lors du mélange de la quantité principale de la matière à mélanger.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que la durée de mélange totale est inférieure à 1 h.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que la matière à mélanger contient en supplément des auxiliaires de pressage.
  10. Procédé selon l'une des revendications 1 à 9, caractérisé en ce que le mélange de poudre est mis en granulés.
EP00904876A 1999-01-15 2000-01-05 Procede pour produire des melanges de metaux durs Expired - Lifetime EP1153150B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19901305A DE19901305A1 (de) 1999-01-15 1999-01-15 Verfahren zur Herstellung von Hartmetallmischungen
DE19901305 1999-01-15
PCT/EP2000/000043 WO2000042230A1 (fr) 1999-01-15 2000-01-05 Procede pour produire des melanges de metaux durs

Publications (2)

Publication Number Publication Date
EP1153150A1 EP1153150A1 (fr) 2001-11-14
EP1153150B1 true EP1153150B1 (fr) 2002-11-27

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EP00904876A Expired - Lifetime EP1153150B1 (fr) 1999-01-15 2000-01-05 Procede pour produire des melanges de metaux durs

Country Status (15)

Country Link
US (1) US6626975B1 (fr)
EP (1) EP1153150B1 (fr)
JP (1) JP2002534613A (fr)
KR (1) KR100653810B1 (fr)
CN (1) CN1114706C (fr)
AT (1) ATE228579T1 (fr)
AU (1) AU2662200A (fr)
CZ (1) CZ20012376A3 (fr)
DE (2) DE19901305A1 (fr)
HK (1) HK1044356B (fr)
IL (1) IL143869A0 (fr)
PL (1) PL191783B1 (fr)
PT (1) PT1153150E (fr)
WO (1) WO2000042230A1 (fr)
ZA (1) ZA200105109B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ502032A (en) * 2000-04-23 2002-08-28 Ind Res Ltd Particulate solid material blender with rotatable closable bin having internal baffle
EP2527062B1 (fr) * 2004-06-30 2014-06-04 TDK Corporation Procédé de production d'un aimant fritté de terres rares
DE102005031459A1 (de) * 2005-07-04 2007-01-11 Vitzthum, Frank, Dr. Vorrichtung und Verfahren zur Rotor-Stator-Homogenisation
CA2625521C (fr) * 2005-10-11 2011-08-23 Baker Hughes Incorporated Systeme, procede et appareil pour ameliorer la durabilite d'outils de forage de terrain faits de substances carburees
DE102006043581B4 (de) * 2006-09-12 2011-11-03 Artur Wiegand Verfahren und Vorrichtung zur Herstellung einer Hartmetall- oder Cermetmischung
CN100436065C (zh) * 2006-11-04 2008-11-26 燕山大学 一种超硬磨具结合剂的处理方法
SE533922C2 (sv) * 2008-12-18 2011-03-01 Seco Tools Ab Sätt att tillverka hårdmetallprodukter
WO2010126424A1 (fr) * 2009-04-27 2010-11-04 Sandvik Intellectual Property Ab Outils en carbure cémenté
EA024836B1 (ru) * 2012-12-20 2016-10-31 Государственное Научное Учреждение "Физико-Технический Институт Национальной Академии Наук Беларуси" Способ вакуумного нанесения металлического покрытия на частицы порошка абразивного материала
GB2529449B (en) * 2014-08-20 2016-08-03 Cassinath Zen A device and method for high shear liquid metal treatment
CN115109960A (zh) * 2021-03-19 2022-09-27 广东金鑫得新材料有限公司 一种无磁镍基硬质合金的快速制备方法
KR20240033071A (ko) * 2021-12-20 2024-03-12 와커 헤미 아게 교반층 반응기에서 가스 상과 미립자의 접촉

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB346473A (en) 1930-01-18 1931-04-16 Firth Sterling Steel Co Improvements in and relating to methods of making compositions of matter having cutting or abrading characteristics
US3348779A (en) 1964-10-02 1967-10-24 Norwood H Andrews Method and apparatus for comminuting materials
US4320156A (en) * 1981-01-12 1982-03-16 Gte Products Corporation Intimate mixtures of refractory metal carbides and a binder metal
DE3515318A1 (de) 1985-04-27 1986-10-30 Draiswerke Gmbh, 6800 Mannheim Stiftmuehle fuer mischer
DE3543370A1 (de) 1985-12-07 1987-06-11 Jackering Altenburger Masch Muehle mit mehreren mahlstufen
US4886638A (en) 1989-07-24 1989-12-12 Gte Products Corporation Method for producing metal carbide grade powders
US4902471A (en) 1989-09-11 1990-02-20 Gte Products Corporation Method for producing metal carbide grade powders
DE4028108C1 (fr) 1990-09-05 1992-05-27 Imcatec-Gmbh Maschinen Fuer Die Verfahrenstechnik, 6800 Mannheim, De
US5007957A (en) 1990-09-10 1991-04-16 Gte Products Corporation Method for producing tungsten carbide grade powders suitable for isostatic compaction
US5045277A (en) 1990-09-10 1991-09-03 Gte Products Corporation Method of producing metal carbide grade powders and controlling the shrinkage of articles made therefrom
SE9101386D0 (sv) * 1991-05-07 1991-05-07 Sandvik Ab Sintrad karbonitridlegering med foerbaettrad slit- styrka
DE4332977A1 (de) 1993-09-28 1995-03-30 Draiswerke Gmbh Reib-Mühle und deren Verwendung
SE504244C2 (sv) 1994-03-29 1996-12-16 Sandvik Ab Sätt att tillverka kompositmaterial av hårdämnen i en metallbindefas
SE502754C2 (sv) 1994-03-31 1995-12-18 Sandvik Ab Sätt att framställa belagt hårdämnespulver
DE29515434U1 (de) * 1995-09-27 1995-11-23 Mahltechnik Goergens Gmbh Micro-Wirbel-Mühle
SE518810C2 (sv) 1996-07-19 2002-11-26 Sandvik Ab Hårdmetallkropp med förbättrade högtemperatur- och termomekaniska egenskaper
SE509609C2 (sv) 1996-07-19 1999-02-15 Sandvik Ab Hårdmetallkropp med två kornstorlekar av WC
SE509616C2 (sv) 1996-07-19 1999-02-15 Sandvik Ab Hårdmetallskär med smal kornstorleksfördelning av WC
SE9603936D0 (sv) 1996-10-25 1996-10-25 Sandvik Ab Method of making cemented carbide by metal injection molding
SE510749C2 (sv) 1997-12-22 1999-06-21 Sandvik Ab Sätt att framställa ett metallkompositmaterial innehållande hårda partiklar och bindemetall
US5922978A (en) 1998-03-27 1999-07-13 Omg Americas, Inc. Method of preparing pressable powders of a transition metal carbide, iron group metal or mixtures thereof
SE9802519D0 (sv) 1998-07-13 1998-07-13 Sandvik Ab Method of making cemented carbide
US6245288B1 (en) 1999-03-26 2001-06-12 Omg Americas, Inc. Method of preparing pressable powders of a transition metal carbide, iron group metal of mixtures thereof

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PL191783B1 (pl) 2006-07-31
WO2000042230A1 (fr) 2000-07-20
CZ20012376A3 (cs) 2002-05-15
DE19901305A1 (de) 2000-07-20
PT1153150E (pt) 2003-04-30
KR100653810B1 (ko) 2006-12-05
KR20010089830A (ko) 2001-10-08
PL349919A1 (en) 2002-10-07
US6626975B1 (en) 2003-09-30
IL143869A0 (en) 2002-04-21
JP2002534613A (ja) 2002-10-15
DE50000822D1 (de) 2003-01-09
EP1153150A1 (fr) 2001-11-14
ZA200105109B (en) 2002-06-21
CN1114706C (zh) 2003-07-16
ATE228579T1 (de) 2002-12-15
HK1044356B (zh) 2004-04-02
AU2662200A (en) 2000-08-01
CN1336962A (zh) 2002-02-20
HK1044356A1 (en) 2002-10-18

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