GB956830A - Improvements in or relating to welding electrodes - Google Patents

Improvements in or relating to welding electrodes

Info

Publication number
GB956830A
GB956830A GB3413362A GB3413362A GB956830A GB 956830 A GB956830 A GB 956830A GB 3413362 A GB3413362 A GB 3413362A GB 3413362 A GB3413362 A GB 3413362A GB 956830 A GB956830 A GB 956830A
Authority
GB
United Kingdom
Prior art keywords
tungsten
tungsten carbide
powder
carbon
granules
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
Application number
GB3413362A
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.)
Stora Enso Oyj
Original Assignee
Stora Kopparbergs Bergslags AB
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 Stora Kopparbergs Bergslags AB filed Critical Stora Kopparbergs Bergslags AB
Publication of GB956830A publication Critical patent/GB956830A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550°C
    • B23K35/327—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550°C comprising refractory compounds, e.g. carbides
    • 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
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings or fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)

Abstract

Tungsten carbide filler material in granular form for use in tubular electrodes is made by sintering a powder comprising one or more of tungsten carbide, tungsten and carbon and containing 4.3-4.8% carbon. Tungsten carbide powder is formed into granules, e.g. by rolling with a lubricant, pressing, centrifugation or by utilizing surface tension action, and sintered by heating to 1600-1700 DEG C. Alternatively the powder may be a mixture of tungsten with tungsten carbide or carbon, e.g. soot. 0.2-0.3% of metal from the 8th group of the Periodic System, e.g. cobalt, may be added. In a particular example 6450 gm. tungsten carbide, 2100 gm. tungsten and 20 gm. cobalt in powder form are mixed together and rolled with 5% paraffin wax to form granules. The granules are sintered by heating in a graphite tray at 1650 DEG C. for 45 minutes in an inert gas, e.g. hydrogen or nitrogen, or in vacuum.
GB3413362A 1961-09-22 1962-09-06 Improvements in or relating to welding electrodes Expired GB956830A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE947261 1961-09-22

Publications (1)

Publication Number Publication Date
GB956830A true GB956830A (en) 1964-04-29

Family

ID=20276759

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3413362A Expired GB956830A (en) 1961-09-22 1962-09-06 Improvements in or relating to welding electrodes

Country Status (1)

Country Link
GB (1) GB956830A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9869132B2 (en) 2015-02-04 2018-01-16 National Oilwell Varco, L.P. Wellsite hardfacing with particle distribution and method of using same
US9909395B2 (en) 2015-09-21 2018-03-06 National Oilwell DHT, L.P. Wellsite hardfacing with distributed hard phase and method of using same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9869132B2 (en) 2015-02-04 2018-01-16 National Oilwell Varco, L.P. Wellsite hardfacing with particle distribution and method of using same
US9909395B2 (en) 2015-09-21 2018-03-06 National Oilwell DHT, L.P. Wellsite hardfacing with distributed hard phase and method of using same

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