FR2446327A1 - Internal nitriding and/or carburising of gun or extruder barrels - by thermochemical ion bombardment after creating uniform electric field - Google Patents

Internal nitriding and/or carburising of gun or extruder barrels - by thermochemical ion bombardment after creating uniform electric field

Info

Publication number
FR2446327A1
FR2446327A1 FR7900465A FR7900465A FR2446327A1 FR 2446327 A1 FR2446327 A1 FR 2446327A1 FR 7900465 A FR7900465 A FR 7900465A FR 7900465 A FR7900465 A FR 7900465A FR 2446327 A1 FR2446327 A1 FR 2446327A1
Authority
FR
France
Prior art keywords
electric field
workpiece
carburising
thermochemical
gun
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.)
Pending
Application number
FR7900465A
Other languages
French (fr)
Inventor
Jean-Paul Houvion
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.)
FOURS INDLS CIE
Original Assignee
FOURS INDLS CIE
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 FOURS INDLS CIE filed Critical FOURS INDLS CIE
Priority to FR7900465A priority Critical patent/FR2446327A1/en
Publication of FR2446327A1 publication Critical patent/FR2446327A1/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/32—Gas-filled discharge tubes
    • H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
    • H01J37/32018—Glow discharge
    • 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
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/36—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/32—Gas-filled discharge tubes
    • H01J37/32431—Constructional details of the reactor
    • H01J37/3244—Gas supply means

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

The workpiece is open at both ends, and is suspended in a vacuum furnace. A uniform electric field is created in the bore of the workpiece; and the gas to be ionised is fed into the furnace and removed from the interior of the workpiece, esp. from one end of the latter. One pref. plant includes an anode bar suspended along the axis of the workpiece which forms a cathode. The resulting plasma causes diffusion of H2 and/or C into the bore of the workpiece when the gas is e.g. N2 and/or CH4 at 0.02-5 mbars. Uniform hardening of the bores is achieved.
FR7900465A 1979-01-09 1979-01-09 Internal nitriding and/or carburising of gun or extruder barrels - by thermochemical ion bombardment after creating uniform electric field Pending FR2446327A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7900465A FR2446327A1 (en) 1979-01-09 1979-01-09 Internal nitriding and/or carburising of gun or extruder barrels - by thermochemical ion bombardment after creating uniform electric field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7900465A FR2446327A1 (en) 1979-01-09 1979-01-09 Internal nitriding and/or carburising of gun or extruder barrels - by thermochemical ion bombardment after creating uniform electric field

Publications (1)

Publication Number Publication Date
FR2446327A1 true FR2446327A1 (en) 1980-08-08

Family

ID=9220575

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7900465A Pending FR2446327A1 (en) 1979-01-09 1979-01-09 Internal nitriding and/or carburising of gun or extruder barrels - by thermochemical ion bombardment after creating uniform electric field

Country Status (1)

Country Link
FR (1) FR2446327A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2525636A1 (en) * 1982-04-23 1983-10-28 Creusot Loire Ionic nitriding of holes in steel - of length up to one metre and dia. below ten milli:metres
FR2587731A1 (en) * 1985-09-23 1987-03-27 Centre Nat Rech Scient METHOD AND DEVICE FOR CHEMICAL DEPOSITION OF UNIFORM THIN FILMS ON MANY PLANE SUBSTRATES FROM A GASEOUS PHASE
EP0233825A1 (en) * 1986-01-14 1987-08-26 CNRS, Centre National de la Recherche Scientifique Process, apparatus and equipment necessary for depositing a thin layer of a material on the inner surface of a hollow object
US5405456A (en) * 1993-10-21 1995-04-11 National Science Council Process of surface hardening for titanium alloy by molten salt carburization
US5466305A (en) * 1993-09-21 1995-11-14 Tanaka Limited Method of treating the surface of titanium
GB2597794A (en) * 2020-08-06 2022-02-09 Gallyon Gun And Rifle Makers Ltd A method of assembling a firearm

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1152732A (en) * 1955-05-10 1958-02-24 Hoerder Huettenunion Ag Method and apparatus for treating the surface of bodies in a glow discharge
FR69955E (en) * 1950-11-09 1959-01-30 Berghaus Elektrophysik Anst Process for the treatment of tubes of iron, steel or iron alloys
FR1210232A (en) * 1955-11-22 1960-03-07 Berghaus Elektrophysik Anst Thermal process and device for its implementation
FR1575982A (en) * 1968-04-18 1969-07-25

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR69955E (en) * 1950-11-09 1959-01-30 Berghaus Elektrophysik Anst Process for the treatment of tubes of iron, steel or iron alloys
FR1152732A (en) * 1955-05-10 1958-02-24 Hoerder Huettenunion Ag Method and apparatus for treating the surface of bodies in a glow discharge
FR1210232A (en) * 1955-11-22 1960-03-07 Berghaus Elektrophysik Anst Thermal process and device for its implementation
FR1575982A (en) * 1968-04-18 1969-07-25

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2525636A1 (en) * 1982-04-23 1983-10-28 Creusot Loire Ionic nitriding of holes in steel - of length up to one metre and dia. below ten milli:metres
FR2587731A1 (en) * 1985-09-23 1987-03-27 Centre Nat Rech Scient METHOD AND DEVICE FOR CHEMICAL DEPOSITION OF UNIFORM THIN FILMS ON MANY PLANE SUBSTRATES FROM A GASEOUS PHASE
EP0223629A1 (en) * 1985-09-23 1987-05-27 Centre National De La Recherche Scientifique (Cnrs) Method and apparatus for the chemical vapour deposition of uniform thin films on many flat substrates
EP0233825A1 (en) * 1986-01-14 1987-08-26 CNRS, Centre National de la Recherche Scientifique Process, apparatus and equipment necessary for depositing a thin layer of a material on the inner surface of a hollow object
US4746538A (en) * 1986-01-14 1988-05-24 Centre National De La Recherche Scientifique (Cnrs) Process for depositing a thin layer of a material on the wall of a hollow body
US5466305A (en) * 1993-09-21 1995-11-14 Tanaka Limited Method of treating the surface of titanium
US5405456A (en) * 1993-10-21 1995-04-11 National Science Council Process of surface hardening for titanium alloy by molten salt carburization
GB2597794A (en) * 2020-08-06 2022-02-09 Gallyon Gun And Rifle Makers Ltd A method of assembling a firearm
GB2597794B (en) * 2020-08-06 2022-12-28 Gallyon Gun And Rifle Makers Ltd Method of manufacturing, repairing, hardening and/or improving the wear resistance of a component of a firearm

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