GB1014383A - Hard metal deposits - Google Patents

Hard metal deposits

Info

Publication number
GB1014383A
GB1014383A GB3802062A GB3802062A GB1014383A GB 1014383 A GB1014383 A GB 1014383A GB 3802062 A GB3802062 A GB 3802062A GB 3802062 A GB3802062 A GB 3802062A GB 1014383 A GB1014383 A GB 1014383A
Authority
GB
United Kingdom
Prior art keywords
ccl4
powdered
combined
heating
coating
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
GB3802062A
Inventor
Robert Arthur Cresswell
Jozef Kazimierz Tylko
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.)
BOC Group Ltd
Original Assignee
British Oxigen Ltd
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 British Oxigen Ltd filed Critical British Oxigen Ltd
Priority to GB3802062A priority Critical patent/GB1014383A/en
Priority to DE19631521132 priority patent/DE1521132A1/en
Publication of GB1014383A publication Critical patent/GB1014383A/en
Expired 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
    • C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

A process for the production of a metal carbide coating of extreme hardness containing W2C (i.e. having a hardness of not less than 1700 Vickers Pyramid Number using a 50 gm load) comprises pre-heating a surface to be coated, e.g. a steel surface, and directing upon the pre-heated surface a product formed by rapidly heating powdered W, in elemental form or combined with C, together with sufficient carbonaceous material where necessary to produce a deposit in which between 1.3% and 4.5% by weight of C is combined with the W, the heating being carried out under nonoxidizing conditions in a plasma torch at temperatures in excess of 2400 DEG C. Beta W2C is formed during the process which is unstable and tends to revert to the alpha modification be a solid, e.g. naphthalene or powdered C, a liquid, e.g. benzene, toluene CCl4 or lubricating oil, or a gas, e.g. propane, butane or acetylene. Substances which increase the rate of reaction between the W and C may be employed, such as CH3Cl and CCl4. The coating material may contain a binding material. The surface prior to being sprayed may be heated by the plasma torch using a transferred arc, the coating be deposited using a non-transferred arc, and the surface of the coating then be heated using a transferred arc.ALSO:A process for the production of a metal carbide coating containing beta W2C comprises directing upon a pre-heated surface a product formed by rapidly heating powdered W, in elemental form or combined with C, together with sufficient carbonaceous material where necessary to produce a deposit in which between 1.3% and 4.5% by weight of C is combined with the W, the heating being carried out under non-oxidizing conditions in a plasma torch at temperatures in excess of 2,400 DEG C. The beta W2C formed during the process is unstable and tends to revert to the alpha modification on cooling. The carbonaceous material may be a solid, e.g. naphthalene or powdered C, a liquid, e.g. benzene, toluene, CCl4 or lubricating oil, or a gas, e.g. propane, butane or acetylene. Substances which increase the rate of reaction between the W and C may be employed such as CH3Cl and CCl4.
GB3802062A 1962-10-08 1962-10-08 Hard metal deposits Expired GB1014383A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3802062A GB1014383A (en) 1962-10-08 1962-10-08 Hard metal deposits
DE19631521132 DE1521132A1 (en) 1962-10-08 1963-10-08 Process for the production of hard metal protective layers on workpieces by spray application

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3802062A GB1014383A (en) 1962-10-08 1962-10-08 Hard metal deposits

Publications (1)

Publication Number Publication Date
GB1014383A true GB1014383A (en) 1965-12-22

Family

ID=10400639

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3802062A Expired GB1014383A (en) 1962-10-08 1962-10-08 Hard metal deposits

Country Status (2)

Country Link
DE (1) DE1521132A1 (en)
GB (1) GB1014383A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3017907A1 (en) * 1979-05-10 1980-11-20 Nippon Piston Ring Co Ltd WEAR-RESISTANT SLIDING ELEMENT FOR INTERNAL COMBUSTION ENGINES
GB2153392A (en) * 1984-01-11 1985-08-21 Nat Res Dev Spray deposition of metal
FR2575185A1 (en) * 1984-12-26 1986-06-27 Fabrications Elements Catalyti Process and device for the production of deposits and refills of metallic, metalloceramic and ceramic materials on a substrate
EP0324143A1 (en) * 1987-12-21 1989-07-19 Asahi Kogaku Kogyo Kabushiki Kaisha Process for producing an apatite coated article
GB2276886B (en) * 1993-03-19 1997-04-23 Smith International Rock bits with hard facing
EP0887432A2 (en) * 1997-06-19 1998-12-30 The BOC Group plc Improved plasma spraying
FR2822727A1 (en) * 2001-04-03 2002-10-04 Gesal Ind METHOD FOR APPLYING A COATING RESISTANT TO HIGH TEMPERATURES, DEVICE FOR CARRYING OUT THIS METHOD AND OBJECT PROVIDED WITH SAID COATING
CZ303411B6 (en) * 2005-04-29 2012-09-05 Ústav fyziky plazmatu AV CR, v.v.i. Tungsten-based protective coating and process for preparing thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3017907A1 (en) * 1979-05-10 1980-11-20 Nippon Piston Ring Co Ltd WEAR-RESISTANT SLIDING ELEMENT FOR INTERNAL COMBUSTION ENGINES
GB2153392A (en) * 1984-01-11 1985-08-21 Nat Res Dev Spray deposition of metal
FR2575185A1 (en) * 1984-12-26 1986-06-27 Fabrications Elements Catalyti Process and device for the production of deposits and refills of metallic, metalloceramic and ceramic materials on a substrate
EP0324143A1 (en) * 1987-12-21 1989-07-19 Asahi Kogaku Kogyo Kabushiki Kaisha Process for producing an apatite coated article
US5128146A (en) * 1987-12-21 1992-07-07 Asahi Kogaku Kogyo K.K. Apatite coated article and process for producing the same
GB2276886B (en) * 1993-03-19 1997-04-23 Smith International Rock bits with hard facing
EP0887432A2 (en) * 1997-06-19 1998-12-30 The BOC Group plc Improved plasma spraying
EP0887432A3 (en) * 1997-06-19 1999-01-20 The BOC Group plc Improved plasma spraying
FR2822727A1 (en) * 2001-04-03 2002-10-04 Gesal Ind METHOD FOR APPLYING A COATING RESISTANT TO HIGH TEMPERATURES, DEVICE FOR CARRYING OUT THIS METHOD AND OBJECT PROVIDED WITH SAID COATING
CZ303411B6 (en) * 2005-04-29 2012-09-05 Ústav fyziky plazmatu AV CR, v.v.i. Tungsten-based protective coating and process for preparing thereof

Also Published As

Publication number Publication date
DE1521132A1 (en) 1969-10-30

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