EP0839920A3 - Process for preparing a starting powder material for fine grained hard metal - Google Patents

Process for preparing a starting powder material for fine grained hard metal Download PDF

Info

Publication number
EP0839920A3
EP0839920A3 EP97203354A EP97203354A EP0839920A3 EP 0839920 A3 EP0839920 A3 EP 0839920A3 EP 97203354 A EP97203354 A EP 97203354A EP 97203354 A EP97203354 A EP 97203354A EP 0839920 A3 EP0839920 A3 EP 0839920A3
Authority
EP
European Patent Office
Prior art keywords
powder
fine grained
reaction
inlet
preparing
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.)
Granted
Application number
EP97203354A
Other languages
German (de)
French (fr)
Other versions
EP0839920A2 (en
EP0839920B1 (en
Inventor
Günter Dr. Kneringer
Wolfgang Dr. Köck
Joachim Dr. Resch
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.)
Plansee SE
Original Assignee
Plansee SE
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 Plansee SE filed Critical Plansee SE
Publication of EP0839920A2 publication Critical patent/EP0839920A2/en
Publication of EP0839920A3 publication Critical patent/EP0839920A3/en
Application granted granted Critical
Publication of EP0839920B1 publication Critical patent/EP0839920B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
    • C22C1/053—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds
    • C22C1/056—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds using gas
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Powder Metallurgy (AREA)

Abstract

In the production of a starting powder for fine grained cemented carbide manufacture from a metal oxide or reducible metal compound powder by reducing to metal, carburizing and subjecting to a mechanical-chemical powder treatment and/or mixing operation, the reduction and/or carburization step employs a cyclone unit which is a heated rotationally symmetrical reaction chamber having inlet and outlet openings for the powder, reagent and carrier gas. The continuously supplied powder retains its solid state during high velocity passage through the reaction chamber along predetermined flight paths which are tangential to the chamber wall and which are controlled by means of the powder flight direction and velocity at the inlet and by means of the flow parameters of the carrier and/or reaction gas. The unit produces ≥ 90 vol.% chemical reaction of the powder in a dwell time of 0.1-60 (preferably 0.2-10) s.
EP97203354A 1996-11-04 1997-10-29 Process for preparing a starting powder material for fine grained hard metal Expired - Lifetime EP0839920B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0191296A AT404912B (en) 1996-11-04 1996-11-04 METHOD FOR PRODUCING POWDER PRESSING APPARATUS FOR FINE-GRAINED HARD METAL
AT1912/96 1996-11-04
AT191296 1996-11-04

Publications (3)

Publication Number Publication Date
EP0839920A2 EP0839920A2 (en) 1998-05-06
EP0839920A3 true EP0839920A3 (en) 2000-03-29
EP0839920B1 EP0839920B1 (en) 2002-12-18

Family

ID=3523714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97203354A Expired - Lifetime EP0839920B1 (en) 1996-11-04 1997-10-29 Process for preparing a starting powder material for fine grained hard metal

Country Status (6)

Country Link
US (1) US6113668A (en)
EP (1) EP0839920B1 (en)
JP (1) JPH10140216A (en)
AT (2) AT404912B (en)
DE (1) DE59709001D1 (en)
ES (1) ES2186840T3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6843824B2 (en) * 2001-11-06 2005-01-18 Cerbide Method of making a ceramic body of densified tungsten carbide
JP4619907B2 (en) * 2005-09-20 2011-01-26 中外炉工業株式会社 Powder production equipment
US20130209308A1 (en) * 2012-02-15 2013-08-15 Baker Hughes Incorporated Method of making a metallic powder and powder compact and powder and powder compact made thereby
JP2013222497A (en) * 2012-04-12 2013-10-28 Toshiba Corp Contact material for vacuum valve
CN112390261A (en) * 2019-08-13 2021-02-23 斯特里特技术有限公司 System and method for separation and dehydrogenation of fumed silica particles
CN114853021A (en) * 2022-05-23 2022-08-05 赣州海盛钨业股份有限公司 Nano tungsten carbide powder and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR844368A (en) * 1937-10-06 1939-07-24 Methods and apparatus for improving or transforming ores into metal
FR941412A (en) * 1945-06-27 1949-01-11 Pluro Inc Reduction of metal oxides
US5125964A (en) * 1990-09-10 1992-06-30 General Electric Company Fluidized bed process for preparing tungsten powder
WO1997016275A1 (en) * 1995-10-31 1997-05-09 Plansee Aktiengesellschaft Method for the reduction of metallic compounds

Family Cites Families (23)

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Publication number Priority date Publication date Assignee Title
DD48191A (en) *
US2987392A (en) * 1960-02-02 1961-06-06 Lester D Supiro Method of rapidly producing metallic powders of high purity
BE644277A (en) * 1963-02-27
GB1306617A (en) * 1970-05-08 1973-02-14 Carmet Co Production of tungsten and tungsten carbide powder
DE2716082C2 (en) * 1977-04-12 1985-09-05 Deutsche Babcock Ag, 4200 Oberhausen Process for the thermal treatment of solids
US4402737A (en) * 1982-09-01 1983-09-06 Gte Products Corporation Method of producing tungsten and tungsten carbide powder
JPS59113104A (en) * 1982-12-20 1984-06-29 Toshiba Corp Manufacture of molybdenum powder
FI78125C (en) * 1983-11-14 1989-06-12 Vni Gorno Metall I Tsvet Met FOERFARANDE FOER BEHANDLING AV JAERNHALTIGA KOPPAR- ELLER KOPPAR / ZINKSULFIDKONCENTRAT.
EP0197271B1 (en) * 1985-03-04 1989-04-19 Kabushiki Kaisha Toshiba Methods for preparing high-purity molybdenum or tungsten powder and high-purity oxides powder of the same
JPS6345310A (en) * 1986-08-12 1988-02-26 Tokyo Tungsten Co Ltd Molybdenum powder and its production
DD286312A5 (en) * 1987-07-16 1991-01-24 Kombinat Veb Narva "Rosa Luxemburg",De PROCESS FOR PREPARING TUNGSTEN FIRM POWDER
US5110565A (en) * 1988-02-05 1992-05-05 The Dow Chemical Company Apparatus for producing uniform, fine ceramic powder
US4859236A (en) * 1988-04-25 1989-08-22 Gte Products Corporation Process for producing molybdenum-ruthenium metal powder
HU209657B (en) * 1989-06-02 1994-10-28 Cra Services Method for the pre-heating and pre-reduction of metal oxide ores
JPH086129B2 (en) * 1989-11-09 1996-01-24 プロセダイン コーポレーション Spray conversion method for nanophase hybrid powder production
US5073193A (en) * 1990-06-26 1991-12-17 The University Of British Columbia Method of collecting plasma synthesize ceramic powders
US5125965A (en) * 1990-08-22 1992-06-30 Cyprus Minerals Company Method for maintaining fluidization in a fluidized bed reactor
US5482532A (en) * 1991-06-05 1996-01-09 Kubota Corporation Method of and apparatus for producing metal powder
EP0598040B1 (en) * 1991-08-07 1995-06-07 Rutgers, The State University Of New Jersey CARBOTHERMIC REACTION PROCESS FOR MAKING NANOPHASE WC-Co POWDERS
DE4214723C2 (en) * 1992-05-04 1994-08-25 Starck H C Gmbh Co Kg Finely divided metal powder
US5380688A (en) * 1993-08-09 1995-01-10 The Dow Chemical Company Method for making submicrometer carbides, submicrometer solid solution carbides, and the material resulting therefrom
SE502930C2 (en) * 1994-07-21 1996-02-26 Sandvik Ab Method for the production of powder from hard materials of WC and Co and / or Ni
US5746803A (en) * 1996-06-04 1998-05-05 The Dow Chemical Company Metallic-carbide group VIII metal powder and preparation methods thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR844368A (en) * 1937-10-06 1939-07-24 Methods and apparatus for improving or transforming ores into metal
FR941412A (en) * 1945-06-27 1949-01-11 Pluro Inc Reduction of metal oxides
US5125964A (en) * 1990-09-10 1992-06-30 General Electric Company Fluidized bed process for preparing tungsten powder
WO1997016275A1 (en) * 1995-10-31 1997-05-09 Plansee Aktiengesellschaft Method for the reduction of metallic compounds

Also Published As

Publication number Publication date
ATE230038T1 (en) 2003-01-15
AT404912B (en) 1999-03-25
EP0839920A2 (en) 1998-05-06
ES2186840T3 (en) 2003-05-16
EP0839920B1 (en) 2002-12-18
JPH10140216A (en) 1998-05-26
ATA191296A (en) 1998-08-15
DE59709001D1 (en) 2003-01-30
US6113668A (en) 2000-09-05

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