JPS5524988A - Process for feeding gas into gas soft-nitriding furnace - Google Patents

Process for feeding gas into gas soft-nitriding furnace

Info

Publication number
JPS5524988A
JPS5524988A JP9940478A JP9940478A JPS5524988A JP S5524988 A JPS5524988 A JP S5524988A JP 9940478 A JP9940478 A JP 9940478A JP 9940478 A JP9940478 A JP 9940478A JP S5524988 A JPS5524988 A JP S5524988A
Authority
JP
Japan
Prior art keywords
gas
furnace
soft
nitriding
reduced
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.)
Granted
Application number
JP9940478A
Other languages
Japanese (ja)
Other versions
JPS5751464B2 (en
Inventor
Seiichi Kakuwa
Toshihiko Hattori
Kiyoshi Kurahashi
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.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
Toyo Kogyo 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 Mazda Motor Corp, Toyo Kogyo Co Ltd filed Critical Mazda Motor Corp
Priority to JP9940478A priority Critical patent/JPS5524988A/en
Publication of JPS5524988A publication Critical patent/JPS5524988A/en
Publication of JPS5751464B2 publication Critical patent/JPS5751464B2/ja
Granted 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
    • 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

Landscapes

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

Abstract

PURPOSE:Mixture of NH3 and carrier gas (Rx gas) is preheated to a specified temperature at the outside of gas soft-nitriding chamber and distributed into sectioned chamber in the nitriding zone, whereby power supply to heater inside the furnace is reduced, resulting in reduce NH3 decomposition. CONSTITUTION:Mixture of NH3 gas 9 and carrier gas 10 is heated in preheater 11 to a temperature of 300-500 deg.C. Objects 20 to be treated are mounted on trucks 19 and transferred into the gas soft-nitriding furnace 1. Prfeheated gas is fed through pipes 13I to 13V and distributed into sectioned zones 4 to 8 of the furnace 1. If, for example, gas is preheated to 450 deg.C, and gas soft-nitriding furnace is at 750 deg.C, heater in the furnace requires power 1/5 of usual process where gas is heated from room temperature. Further, power load ratio is reduced from 34% to 26%. Thus, the heater surface is prevented from overheating, resulting in reduced NH3 decomposition.
JP9940478A 1978-08-14 1978-08-14 Process for feeding gas into gas soft-nitriding furnace Granted JPS5524988A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9940478A JPS5524988A (en) 1978-08-14 1978-08-14 Process for feeding gas into gas soft-nitriding furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9940478A JPS5524988A (en) 1978-08-14 1978-08-14 Process for feeding gas into gas soft-nitriding furnace

Publications (2)

Publication Number Publication Date
JPS5524988A true JPS5524988A (en) 1980-02-22
JPS5751464B2 JPS5751464B2 (en) 1982-11-02

Family

ID=14246543

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9940478A Granted JPS5524988A (en) 1978-08-14 1978-08-14 Process for feeding gas into gas soft-nitriding furnace

Country Status (1)

Country Link
JP (1) JPS5524988A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014118606A (en) * 2012-12-17 2014-06-30 Toyota Motor Corp Heat treatment apparatus and heat treatment method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014118606A (en) * 2012-12-17 2014-06-30 Toyota Motor Corp Heat treatment apparatus and heat treatment method

Also Published As

Publication number Publication date
JPS5751464B2 (en) 1982-11-02

Similar Documents

Publication Publication Date Title
EP0818555A4 (en) Method and equipment for vacuum carburization and products of carburization
NO930327D0 (en) PROCEDURE FOR HEATING THE IRONAL REACTOR SUPPLY FOR TREATMENT IN A FLUIDIZED LAYER REACTOR
GB1532661A (en) Process and an apparatus for the production of carbon black
ES8202530A1 (en) Process for the preparation of 2-chloro-1,1,1,2,3,3,3-heptafluoropropane.
JPS5524988A (en) Process for feeding gas into gas soft-nitriding furnace
GB1494962A (en) Method of and apparatus for heat treating finely divided material
SE8205086D0 (en) SET TO MAKE PROCESS
DE3574367D1 (en) Process and apparatus for the treatment of sewage sludge
ES8102989A1 (en) Dry reaction process of asbestos tailings and ammonium sulfate
JPS54123600A (en) Production of titanium carbonitride
ES8106762A1 (en) Process for treating metals using recycled gases
GB952553A (en) A method for the production of aluminium nitride refractory material
Hombeck Scientific and Economic Aspects of Plasma Nitriding
ES468692A1 (en) Process for thermally treating fine-grained solids
JPS6424009A (en) Production of beta-type calcium tertiary phosphate
JPS56152799A (en) Treatment of waste matter containing cyanide
JPS5528356A (en) Gas soft-nitriding method
JPS5595608A (en) Heat treating method for carbon material
GB2301353A (en) Treatment of undesirable halogenated organic compounds
JPS55152182A (en) Steam treatment of iron based product
JPS5547211A (en) Production of lithium nitride
Lou et al. Increasing the Service Life of Fire-Proof Brick Dies by Duplex Treatment of Pack Carburizing and Boron-Nitriding
He Gas Nitriding of High-Speed Heavy Load Gears
JPS5684418A (en) Direct fire heating method
JPS5514110A (en) Continuous processing method for brazing and gas soft nitriding in furnace