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JPS56119741A - Controlling method for transformed structure of steel - Google Patents

Controlling method for transformed structure of steel

Info

Publication number
JPS56119741A
JPS56119741A JP2346980A JP2346980A JPS56119741A JP S56119741 A JPS56119741 A JP S56119741A JP 2346980 A JP2346980 A JP 2346980A JP 2346980 A JP2346980 A JP 2346980A JP S56119741 A JPS56119741 A JP S56119741A
Authority
JP
Japan
Prior art keywords
transformation
temp
steel
heat
cooling
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
JP2346980A
Other languages
Japanese (ja)
Other versions
JPS6056210B2 (en
Inventor
Nobuhiko Matsuzu
Hiroshi Yada
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP2346980A priority Critical patent/JPS6056210B2/en
Publication of JPS56119741A publication Critical patent/JPS56119741A/en
Publication of JPS6056210B2 publication Critical patent/JPS6056210B2/en
Expired 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
    • C21D11/00—Process control or regulation for heat treatments

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)
  • Control Of Heat Treatment Processes (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE:To obtain the expected quality of steel by expressing the quantitative influence of transformation heat by an equation, obtaining the progress of transformation from the beginning to the end by calculation, and estimating the transformation temp. zero to perform control. CONSTITUTION:In heat treatment for subjecting steel to diffusion transformation at a desired temp. to obtain the expected quality, the steel of temp. T1 and transformation rate Y1 is held at temp. T2 for slight time DELTAt in the next stage, and transformation rate Y2 after time DELTAt is obtd. by equation I. Supposing cooling rate to be V(deg/sec), all of transformation heat to be H(cal/g) and specific heat to be C(cal/ degg), net temp. change DELTAT(=T1-T2) of the steel during time DELTAt due to transformation heating and cooling is calculated by equation II to obtain the gradual progress of transformation under arbitrary cooling conditions, and the transformation temp. zone is estimated. This zone is compared to the desired transformation temp. zone, and when they are different from each other, the cooling conditions are modified. Means such as cooling stop, heat insulation or a temp. rise may be applied.
JP2346980A 1980-02-28 1980-02-28 Steel transformation structure control method Expired JPS6056210B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2346980A JPS6056210B2 (en) 1980-02-28 1980-02-28 Steel transformation structure control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2346980A JPS6056210B2 (en) 1980-02-28 1980-02-28 Steel transformation structure control method

Publications (2)

Publication Number Publication Date
JPS56119741A true JPS56119741A (en) 1981-09-19
JPS6056210B2 JPS6056210B2 (en) 1985-12-09

Family

ID=12111381

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2346980A Expired JPS6056210B2 (en) 1980-02-28 1980-02-28 Steel transformation structure control method

Country Status (1)

Country Link
JP (1) JPS6056210B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020138294A1 (en) * 2018-12-27 2020-07-02 日本製鉄株式会社 Heat treatment analysis method and device, program, and recording medium

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6399211U (en) * 1986-12-18 1988-06-27
JPH0540407Y2 (en) * 1987-04-15 1993-10-14

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020138294A1 (en) * 2018-12-27 2020-07-02 日本製鉄株式会社 Heat treatment analysis method and device, program, and recording medium

Also Published As

Publication number Publication date
JPS6056210B2 (en) 1985-12-09

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