JPS55125266A - Increasing method for hardness of nitriding low carbon low alloy steel by reheating - Google Patents

Increasing method for hardness of nitriding low carbon low alloy steel by reheating

Info

Publication number
JPS55125266A
JPS55125266A JP3230879A JP3230879A JPS55125266A JP S55125266 A JPS55125266 A JP S55125266A JP 3230879 A JP3230879 A JP 3230879A JP 3230879 A JP3230879 A JP 3230879A JP S55125266 A JPS55125266 A JP S55125266A
Authority
JP
Japan
Prior art keywords
nitriding
alloy steel
reheating
hardness
low carbon
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
JP3230879A
Other languages
Japanese (ja)
Inventor
Toshihiro Yamada
Masahisa Aoyanagi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3230879A priority Critical patent/JPS55125266A/en
Publication of JPS55125266A publication Critical patent/JPS55125266A/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 accelerate the formation of Si3N4 which had been insufficient in a nitriding state and further increase the surface hardness of this alloy steel by reheating the nitriding low carbon low alloy steel having been nitrided within the specified temperature range. CONSTITUTION:The nitriding low carbon low alloy steel composed of C; 0.15- 0.30%, Si; 2.0% or less, Mn; 1.0% or less and the rest Fe and unavoidable impurities is subjdcted to nitriding treatment at temperatures of 500-600 deg.C in, e.g., a NH3 gas atmosphere. Thence, the alloy steel having been subjected to the nitriding treatment is reheated at temperatures of 200-600 deg.C, whereby its surface hardness is further increased.
JP3230879A 1979-03-22 1979-03-22 Increasing method for hardness of nitriding low carbon low alloy steel by reheating Pending JPS55125266A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3230879A JPS55125266A (en) 1979-03-22 1979-03-22 Increasing method for hardness of nitriding low carbon low alloy steel by reheating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3230879A JPS55125266A (en) 1979-03-22 1979-03-22 Increasing method for hardness of nitriding low carbon low alloy steel by reheating

Publications (1)

Publication Number Publication Date
JPS55125266A true JPS55125266A (en) 1980-09-26

Family

ID=12355307

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3230879A Pending JPS55125266A (en) 1979-03-22 1979-03-22 Increasing method for hardness of nitriding low carbon low alloy steel by reheating

Country Status (1)

Country Link
JP (1) JPS55125266A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579229A1 (en) * 1985-03-20 1986-09-26 Lucas Ind Plc METHOD FOR THE SURFACE CURING OF THIN METAL OBJECTS AND DEVICE FOR IMPLEMENTING SAME

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579229A1 (en) * 1985-03-20 1986-09-26 Lucas Ind Plc METHOD FOR THE SURFACE CURING OF THIN METAL OBJECTS AND DEVICE FOR IMPLEMENTING SAME

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