GB1309257A - Method of nitriding hollow bodies - Google Patents

Method of nitriding hollow bodies

Info

Publication number
GB1309257A
GB1309257A GB1309257DA GB1309257A GB 1309257 A GB1309257 A GB 1309257A GB 1309257D A GB1309257D A GB 1309257DA GB 1309257 A GB1309257 A GB 1309257A
Authority
GB
United Kingdom
Prior art keywords
nitriding
gas
hollow bodies
tube
line
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
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.)
MILLINGFORD ENG CO Ltd
Original Assignee
MILLINGFORD ENG CO 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 MILLINGFORD ENG CO Ltd filed Critical MILLINGFORD ENG CO Ltd
Publication of GB1309257A publication Critical patent/GB1309257A/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
    • 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
    • C23C8/08—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 only one element being applied
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding of ferrous surfaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/14—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes wear-resistant or pressure-resistant pipes
    • 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
    • C23C8/04—Treatment of selected surface areas, e.g. using masks

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

1309257 Nitriding tube bores MILLINGFORD ENG CO Ltd 18 Feb 1970 7902/70 Heading C7U The tube or other hollow body is heated in a furnace while a continuous controlled flow of nitriding gas is passed through it so that only the inner surface is exposed thereto. Treatment may be carried out for 12-100 hours at 470-700‹ C with the gas at a pressure of 15-25 lb/sq. in. In a particular embodiment tubes 1, 2, 3 are connected in series to a gas line 4 by threaded plugs 9 and connectors 12, the line being supplied with ammonia from source 5 through pressure reducing valve 6 and flowmeter 7.
GB1309257D 1970-02-18 1970-02-18 Method of nitriding hollow bodies Expired GB1309257A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB790270 1970-02-18

Publications (1)

Publication Number Publication Date
GB1309257A true GB1309257A (en) 1973-03-07

Family

ID=9841997

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1309257D Expired GB1309257A (en) 1970-02-18 1970-02-18 Method of nitriding hollow bodies

Country Status (1)

Country Link
GB (1) GB1309257A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2431548A1 (en) * 1978-07-17 1980-02-15 Ch Gi Gas case hardening pipes for conveying abrasive materials - uses two centering pipes to feed gas and has ring induction heater and spray on trolley
US4382829A (en) 1979-12-05 1983-05-10 Nippon Kokan Kabushiki Kaisha Austenite alloy tubes having excellent high temperature vapor oxidation resistant property
EP0512254A2 (en) * 1991-05-08 1992-11-11 Degussa Ag Process for uniform thermochemical treatment of steel pieces having difficult accessible areas
US5292555A (en) * 1990-07-04 1994-03-08 Degussa Aktiengesellschaft Process for applying nitride layers to titanium
CN115181930A (en) * 2022-07-26 2022-10-14 扬州大学 Nitridation device for 304 stainless steel sewage pump pipeline

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2431548A1 (en) * 1978-07-17 1980-02-15 Ch Gi Gas case hardening pipes for conveying abrasive materials - uses two centering pipes to feed gas and has ring induction heater and spray on trolley
US4382829A (en) 1979-12-05 1983-05-10 Nippon Kokan Kabushiki Kaisha Austenite alloy tubes having excellent high temperature vapor oxidation resistant property
US5292555A (en) * 1990-07-04 1994-03-08 Degussa Aktiengesellschaft Process for applying nitride layers to titanium
EP0512254A2 (en) * 1991-05-08 1992-11-11 Degussa Ag Process for uniform thermochemical treatment of steel pieces having difficult accessible areas
EP0512254A3 (en) * 1991-05-08 1993-03-24 Degussa Ag Process for uniform thermochemical treatment of steel pieces having difficult accessible areas
CN115181930A (en) * 2022-07-26 2022-10-14 扬州大学 Nitridation device for 304 stainless steel sewage pump pipeline
CN115181930B (en) * 2022-07-26 2023-09-05 扬州大学 Nitriding device of 304 stainless steel sewage pump pipeline

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee