JPS5741302A - Method and device for steam treatment of ferrous sintered material - Google Patents

Method and device for steam treatment of ferrous sintered material

Info

Publication number
JPS5741302A
JPS5741302A JP11632180A JP11632180A JPS5741302A JP S5741302 A JPS5741302 A JP S5741302A JP 11632180 A JP11632180 A JP 11632180A JP 11632180 A JP11632180 A JP 11632180A JP S5741302 A JPS5741302 A JP S5741302A
Authority
JP
Japan
Prior art keywords
ferrous sintered
sintered material
gaseous
steam treatment
fe3o4
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
JP11632180A
Other languages
Japanese (ja)
Inventor
Atsushi Kuroishi
Sogo Hase
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries 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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP11632180A priority Critical patent/JPS5741302A/en
Publication of JPS5741302A publication Critical patent/JPS5741302A/en
Pending 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
    • C23C8/10—Oxidising
    • C23C8/16—Oxidising using oxygen-containing compounds, e.g. water, carbon dioxide
    • C23C8/18—Oxidising of ferrous surfaces

Abstract

PURPOSE:To form Fe3O4 down to the inside of the surface connecting holes of a ferrous sintered material and controlling the ratio of the pressure of gaseous H2 with respect to the H2O to be introduced into a furnace in the steam treatment process of the ferrous sintered material. CONSTITUTION:Gaseous H2 and H2O are introduced into a furnace loaded with ferrous sintered materials from the outside, and the pressure P(water)/P(hydrogen) in the furnace is controlled between 0.05-0.6. Further, pulsation is applied to the gaseous (H2O, H2) pressure to be introduced at this time. As a result, Fe3O4 is formed down to the inside of the connecting holes near the surfaces of the ferrous sintered materials. Thereby, sufficient retaining of airtightness is made possible despite the mechanical removal of the films of Fe3O4 on the surfaces.
JP11632180A 1980-08-23 1980-08-23 Method and device for steam treatment of ferrous sintered material Pending JPS5741302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11632180A JPS5741302A (en) 1980-08-23 1980-08-23 Method and device for steam treatment of ferrous sintered material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11632180A JPS5741302A (en) 1980-08-23 1980-08-23 Method and device for steam treatment of ferrous sintered material

Publications (1)

Publication Number Publication Date
JPS5741302A true JPS5741302A (en) 1982-03-08

Family

ID=14684082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11632180A Pending JPS5741302A (en) 1980-08-23 1980-08-23 Method and device for steam treatment of ferrous sintered material

Country Status (1)

Country Link
JP (1) JPS5741302A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61253358A (en) * 1985-04-30 1986-11-11 Sumitomo Electric Ind Ltd Surface treatment of sintered mechanical parts
US8193872B2 (en) 2009-02-10 2012-06-05 Spc Electronics Corporation Waveguide circulator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017307A (en) * 1973-06-21 1975-02-24
JPS5051912A (en) * 1973-09-11 1975-05-09

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017307A (en) * 1973-06-21 1975-02-24
JPS5051912A (en) * 1973-09-11 1975-05-09

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61253358A (en) * 1985-04-30 1986-11-11 Sumitomo Electric Ind Ltd Surface treatment of sintered mechanical parts
US8193872B2 (en) 2009-02-10 2012-06-05 Spc Electronics Corporation Waveguide circulator

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