JPS5751260A - Method for carbonitriding - Google Patents

Method for carbonitriding

Info

Publication number
JPS5751260A
JPS5751260A JP12401880A JP12401880A JPS5751260A JP S5751260 A JPS5751260 A JP S5751260A JP 12401880 A JP12401880 A JP 12401880A JP 12401880 A JP12401880 A JP 12401880A JP S5751260 A JPS5751260 A JP S5751260A
Authority
JP
Japan
Prior art keywords
parts
cooling medium
immersing
temp
strains
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
JP12401880A
Other languages
Japanese (ja)
Inventor
Katsunori Takada
Ryoji Tanaka
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.)
Daido Steel Co Ltd
Original Assignee
Daido Steel 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 Daido Steel Co Ltd filed Critical Daido Steel Co Ltd
Priority to JP12401880A priority Critical patent/JPS5751260A/en
Publication of JPS5751260A publication Critical patent/JPS5751260A/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
    • C23C8/80—After-treatment

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:To obtain surface hardened parts of high accuracy which cause extremely less strains by heating steel parts in a carbonitriding atmosphere to diffuse specific amts. of C and N into the surfaces of said parts then immersing the parts in a cooling medium of specific temps. thereby chaning the structure. CONSTITUTION:Steel parts are heated in a carbonitriding atmosphere to control the average contents of C and N at the depth down to 0.4mm. from the surfaces to >=0.6% and >=0.1% respectively. Thence, the parts are immediately immersed in a cooling medium set to 150-500 deg.C, to change the diffused layers rich of C and N from austenite structure to martensite, bainite or their mixed structure. Further, it is also possible to suppress the generation of heat treatment strains by immersing the parts into the cooling medium of 150-500 deg.C after lowering the temp. thereof to an Ar3+150 deg.C temp. range from the Ar3 based on the composition of the carbonitrided layers prior to immersion into the cooling medium thereby applying quick cooling treatment.
JP12401880A 1980-09-09 1980-09-09 Method for carbonitriding Pending JPS5751260A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12401880A JPS5751260A (en) 1980-09-09 1980-09-09 Method for carbonitriding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12401880A JPS5751260A (en) 1980-09-09 1980-09-09 Method for carbonitriding

Publications (1)

Publication Number Publication Date
JPS5751260A true JPS5751260A (en) 1982-03-26

Family

ID=14874985

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12401880A Pending JPS5751260A (en) 1980-09-09 1980-09-09 Method for carbonitriding

Country Status (1)

Country Link
JP (1) JPS5751260A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5085714A (en) * 1989-08-09 1992-02-04 Kabushiki Kaisha Kobe Seiko Sho Method of manufacturing a steel sheet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5085714A (en) * 1989-08-09 1992-02-04 Kabushiki Kaisha Kobe Seiko Sho Method of manufacturing a steel sheet

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