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WO1987004039A1 - Electrode a courant eleve - Google Patents

Electrode a courant eleve Download PDF

Info

Publication number
WO1987004039A1
WO1987004039A1 PCT/EP1986/000757 EP8600757W WO8704039A1 WO 1987004039 A1 WO1987004039 A1 WO 1987004039A1 EP 8600757 W EP8600757 W EP 8600757W WO 8704039 A1 WO8704039 A1 WO 8704039A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
current electrode
zro
tho
ceo
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.)
Ceased
Application number
PCT/EP1986/000757
Other languages
German (de)
English (en)
Inventor
Kuno Kirner
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.)
Plasmainvent AG
Original Assignee
Plasmainvent AG
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 Plasmainvent AG filed Critical Plasmainvent AG
Publication of WO1987004039A1 publication Critical patent/WO1987004039A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0205—Non-consumable electrodes; C-electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/24—Features related to electrodes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/3478—Geometrical details

Definitions

  • the coating consists of W and at least 1% by weight of LaB 6 or Y 2 O 3 .
  • Flow behavior of the tungsten powder given by the additives during plasma spraying The flow behavior depends on the grain size.
  • the coating 3 of the high-current electrodes 1 described in connection with FIGS. 1 and 3 was applied in a plasma spraying process.
  • the wettable powder consisted of tungsten with the additives explained below, which reduce the electron work function of tungsten.
  • the electrode base body consisted, for example, of pure tungsten, copper, molybdenum and the like, the coating 3 being applied in any thickness in the preferred plasma spraying process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Geometry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

L'électrode à courant élevé (1), qui est réalisée à partir d'un matériau ayant une bonne conductibilité thermique et électrique, est enrobée d'un revêtement (3) pour réduire la perte par combustion du matériau du corps (2) de l'électrode, ledit revêtement fondant à une température élevée et possédant une faible affinité pour les électrons. Le revêtement (3) est appliqué de préférence au moyen du procédé de dépôt par projection au plasma. Le mélange de poudre de projection pour le revêtement (3) comporte de préférence W et au moins 4 % en poids de Th02 ou de Ce0, ou bien W et au moins 1 % en poids d'oxydes, carbures, borures caractérisés par une température de fusion élevée et un faible travail de sortie des électrons.
PCT/EP1986/000757 1985-12-17 1986-12-17 Electrode a courant eleve Ceased WO1987004039A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853544657 DE3544657A1 (de) 1985-12-17 1985-12-17 Hochstromelektrode
DEP3544657.9 1985-12-17

Publications (1)

Publication Number Publication Date
WO1987004039A1 true WO1987004039A1 (fr) 1987-07-02

Family

ID=6288675

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1986/000757 Ceased WO1987004039A1 (fr) 1985-12-17 1986-12-17 Electrode a courant eleve

Country Status (3)

Country Link
EP (1) EP0250511A1 (fr)
DE (1) DE3544657A1 (fr)
WO (1) WO1987004039A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0500492A1 (fr) * 1991-02-21 1992-08-26 Sulzer Metco AG Appareil de pulvérisation par plasma de matériaux en poudre ou gazeux
RU2158062C1 (ru) * 1999-07-28 2000-10-20 Открытое акционерное общество "Институт Гипроникель" Способ защиты нерасходуемого электрода в шлаковом расплаве

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4122756A1 (de) * 1991-07-10 1993-02-11 Erno Raumfahrttechnik Gmbh Triebwerk fuer raumflugkoerper
DE19626941A1 (de) * 1996-07-04 1998-01-08 Castolin Sa Verfahren zum Beschichten oder Schweißen leicht oxidierbarer Werkstoffe sowie Plasmabrenner dafür
DE19707699C1 (de) * 1997-02-26 1998-07-23 Oliver Dr Ing Prause Plasmabrenner für Plasmaspritzanlagen
DE19900477A1 (de) * 1999-01-08 2000-07-13 Linde Tech Gase Gmbh Thermisches Schneiden und Schweißen mit Verschleißschutz

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB750632A (en) * 1952-11-13 1956-06-20 Union Carbide & Carbon Corp Improvements in refractory metal electrodes for use in inert gas-shield welding and cutting apparatus
GB899275A (en) * 1957-12-03 1962-06-20 Union Carbide Corp Improvements in and relating to a process for the production of a coated workpiece
FR1421353A (fr) * 1964-08-19 1965-12-17 Saint Gobain Perfectionnements aux électrodes réfractaires pour arcs électriques de forte intensité
DE1806856A1 (de) * 1968-02-23 1971-01-21 Siemens Ag Nichtabschmelzende Elektrode fuer Lichtboegen kleiner Leistung
FR2187492A1 (en) * 1972-06-05 1974-01-18 Riou Andre Refractory welding electrode - for inert gas shielded welding
FR2207193A1 (fr) * 1972-11-17 1974-06-14 Union Carbide Corp
DE2755213A1 (de) * 1977-12-10 1979-06-13 Duerrwaechter E Dr Doduco Nichtabschmelzende elektrode und verfahren zu ihrer herstellung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3515839A (en) * 1967-04-07 1970-06-02 Hitachi Ltd Plasma torch

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB750632A (en) * 1952-11-13 1956-06-20 Union Carbide & Carbon Corp Improvements in refractory metal electrodes for use in inert gas-shield welding and cutting apparatus
GB899275A (en) * 1957-12-03 1962-06-20 Union Carbide Corp Improvements in and relating to a process for the production of a coated workpiece
FR1421353A (fr) * 1964-08-19 1965-12-17 Saint Gobain Perfectionnements aux électrodes réfractaires pour arcs électriques de forte intensité
DE1806856A1 (de) * 1968-02-23 1971-01-21 Siemens Ag Nichtabschmelzende Elektrode fuer Lichtboegen kleiner Leistung
FR2187492A1 (en) * 1972-06-05 1974-01-18 Riou Andre Refractory welding electrode - for inert gas shielded welding
FR2207193A1 (fr) * 1972-11-17 1974-06-14 Union Carbide Corp
DE2755213A1 (de) * 1977-12-10 1979-06-13 Duerrwaechter E Dr Doduco Nichtabschmelzende elektrode und verfahren zu ihrer herstellung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0500492A1 (fr) * 1991-02-21 1992-08-26 Sulzer Metco AG Appareil de pulvérisation par plasma de matériaux en poudre ou gazeux
RU2158062C1 (ru) * 1999-07-28 2000-10-20 Открытое акционерное общество "Институт Гипроникель" Способ защиты нерасходуемого электрода в шлаковом расплаве

Also Published As

Publication number Publication date
DE3544657A1 (de) 1987-06-19
EP0250511A1 (fr) 1988-01-07

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