GB1380098A - Plasma flame spraying - Google Patents

Plasma flame spraying

Info

Publication number
GB1380098A
GB1380098A GB5119372A GB5119372A GB1380098A GB 1380098 A GB1380098 A GB 1380098A GB 5119372 A GB5119372 A GB 5119372A GB 5119372 A GB5119372 A GB 5119372A GB 1380098 A GB1380098 A GB 1380098A
Authority
GB
United Kingdom
Prior art keywords
plasma
arc
gas
current
gas flow
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
GB5119372A
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.)
Metco Inc
Original Assignee
Metco Inc
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 Metco Inc filed Critical Metco Inc
Publication of GB1380098A publication Critical patent/GB1380098A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H05H1/36—Circuit arrangements
    • 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
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying

Landscapes

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

Abstract

1380098 Automatic control of plasma arc spraying METCO Inc 7 Nov 1972 [5 June 1972] 51193/72 Heading G3R Plasma flame spraying apparatus includes an arrangement for automatically controlling arc current and secondary plasma gas flow around the arc so that both increase and reach predetermined working values at approximately the same time. As shown, a plasma gun 19 receives primary plasma-forming gas and a cooling sheath of secondary gas at a flow-rate controlled by an accumulator in a valve module 17 which also supplies gas for carrying powder for spraying to the gun. The gas used may be nitrogen or argon. An arc is established by an ignition circuit including a high frequency generator 13, and a power supply circuit 11 includes a saturable winding controlled by transistors and an SCR. In closed loop operation, the arc current is held at a predetermined level for a given plasma gas flow, the current being sensed to produce a control signal which is fed through an amplifier to the firing circuit of the SCR. The current detector may be a shunt, a Hall effect device or a photo-cell arrangement. During start-up, the control signal is used to open a solenoid valve to increase the gas flow with the arc current. Line voltage fluctuations are compensated by a Zener diode circuit, Fig. 5 (not shown), and an overcurrent protection relay (270) is also included Fig. 10 (not shown).
GB5119372A 1972-06-05 1972-11-07 Plasma flame spraying Expired GB1380098A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25998772A 1972-06-05 1972-06-05

Publications (1)

Publication Number Publication Date
GB1380098A true GB1380098A (en) 1975-01-08

Family

ID=22987333

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5119372A Expired GB1380098A (en) 1972-06-05 1972-11-07 Plasma flame spraying

Country Status (6)

Country Link
JP (2) JPS5734640B2 (en)
CA (1) CA977037A (en)
DE (2) DE2366424C2 (en)
FR (1) FR2188395B1 (en)
GB (1) GB1380098A (en)
IT (1) IT962172B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4133988A (en) * 1975-03-12 1979-01-09 Esibyan Eduard M Method of plasma arc cutting control and a device for realizing same
EP0194050A1 (en) * 1985-02-12 1986-09-10 Metallurgical Industries, Inc. A welding apparatus and method for depositing wear surfacing material on a substrate

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2582950B2 (en) * 1991-04-23 1997-02-19 株式会社日立製作所 Plasma equipment

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1229882B (en) * 1958-12-31 1966-12-01 Gen Electric Arc spray gun
US3343033A (en) * 1964-12-01 1967-09-19 Avco Corp Aid to striking an electric arc
DE1254267B (en) * 1966-07-07 1967-11-16 Messer Griesheim Gmbh Method for supplying one or more gas components to a gas mixture, in particular during plasma cutting and device for carrying out the method
CA871894A (en) 1968-08-02 1971-05-25 Canadian Titanium Pigments Limited Plasma arc heating apparatus
US3602683A (en) * 1969-02-03 1971-08-31 Sumitomo Heavy Industries Automatic control mechanism for plasma welder
GB1405415A (en) * 1971-11-06 1975-09-10 Rolls Royce Plasma arc welding

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4133988A (en) * 1975-03-12 1979-01-09 Esibyan Eduard M Method of plasma arc cutting control and a device for realizing same
EP0194050A1 (en) * 1985-02-12 1986-09-10 Metallurgical Industries, Inc. A welding apparatus and method for depositing wear surfacing material on a substrate

Also Published As

Publication number Publication date
IT962172B (en) 1973-12-20
CA977037A (en) 1975-10-28
DE2300450A1 (en) 1974-01-03
JPS6238840B2 (en) 1987-08-19
DE2366424C2 (en) 1988-06-16
DE2300450C2 (en) 1983-06-09
FR2188395A1 (en) 1974-01-18
FR2188395B1 (en) 1976-10-29
JPS5734640B2 (en) 1982-07-23
JPS4961797A (en) 1974-06-14
JPS5779074A (en) 1982-05-18

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years