JPS54103732A - Heat treatment of extremely low carbon tough steel - Google Patents

Heat treatment of extremely low carbon tough steel

Info

Publication number
JPS54103732A
JPS54103732A JP1101978A JP1101978A JPS54103732A JP S54103732 A JPS54103732 A JP S54103732A JP 1101978 A JP1101978 A JP 1101978A JP 1101978 A JP1101978 A JP 1101978A JP S54103732 A JPS54103732 A JP S54103732A
Authority
JP
Japan
Prior art keywords
low carbon
extremely low
hardening
heat treatment
transformation point
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
JP1101978A
Other languages
Japanese (ja)
Inventor
Toshihiro Minami
Seigo Shimizu
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP1101978A priority Critical patent/JPS54103732A/en
Publication of JPS54103732A publication Critical patent/JPS54103732A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE:To provide a steel material excellent in the impact value preventing distortion accompanied by the heat treatment by cooling an extremely low carbon alloy steel controlled to become a bentonite structure at a state of hardening at a specified rate from the AC3 transformation point. CONSTITUTION:An extremely low carbon alloy steel containing C of less than 0.10%, Mn of 1.8 to 4.5% or the like whose components are controlled to become a bainite structure or a bainite structure containing martensite in a state of hardening is cooled at a rate of more than 200 deg.C/min. from a temperature range above the AC3 transformation point. Otherwise, after heated above the transformation point, it is cooled in the air at a rate of 200 deg.C/min. after an air cooling within the temperature range above the bainite formation level. With such a method, a low carbon tough steel excellent in mechanical characteristics can be produced without annealing following the hardening.
JP1101978A 1978-02-01 1978-02-01 Heat treatment of extremely low carbon tough steel Pending JPS54103732A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1101978A JPS54103732A (en) 1978-02-01 1978-02-01 Heat treatment of extremely low carbon tough steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1101978A JPS54103732A (en) 1978-02-01 1978-02-01 Heat treatment of extremely low carbon tough steel

Publications (1)

Publication Number Publication Date
JPS54103732A true JPS54103732A (en) 1979-08-15

Family

ID=11766391

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1101978A Pending JPS54103732A (en) 1978-02-01 1978-02-01 Heat treatment of extremely low carbon tough steel

Country Status (1)

Country Link
JP (1) JPS54103732A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022646A (en) * 1983-07-07 1985-02-05 Masashi Hashiura Equipment and method for measuring quench hardness by colorimetry
JPH0328318A (en) * 1989-06-26 1991-02-06 Nichiei Kozai Kk Method for hardening hot die steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022646A (en) * 1983-07-07 1985-02-05 Masashi Hashiura Equipment and method for measuring quench hardness by colorimetry
JPH0328318A (en) * 1989-06-26 1991-02-06 Nichiei Kozai Kk Method for hardening hot die steel

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