JPS56163217A - Slow cooling method for steel material - Google Patents

Slow cooling method for steel material

Info

Publication number
JPS56163217A
JPS56163217A JP6631780A JP6631780A JPS56163217A JP S56163217 A JPS56163217 A JP S56163217A JP 6631780 A JP6631780 A JP 6631780A JP 6631780 A JP6631780 A JP 6631780A JP S56163217 A JPS56163217 A JP S56163217A
Authority
JP
Japan
Prior art keywords
steel material
cooling
slow cooling
temp
slow
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
JP6631780A
Other languages
Japanese (ja)
Other versions
JPS5750851B2 (en
Inventor
Kazuo Kobayashi
Shinsuke Izumi
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
Sumitomo Metal 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 Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP6631780A priority Critical patent/JPS56163217A/en
Publication of JPS56163217A publication Critical patent/JPS56163217A/en
Publication of JPS5750851B2 publication Critical patent/JPS5750851B2/ja
Granted 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
    • C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02—Extraction of non-metals
    • C21D3/06—Extraction of hydrogen

Abstract

PURPOSE:To shorten slow cooling time without lowering dehydrogenation efficiency by slow cooling a high-temp. steel material after hot working down to specific temp. in a hermetically adiabatic state thence force-cooling the same. CONSTITUTION:A high-temp. steel material after hot working, for example, a high- temp. billet of steel material for pipes and bars is contained in a hermetically closable pit type or cover type slow cooling furnace. It is slow cooled in a region about <=500 deg.C where hydrogen diffusion is high in the adiabatic state, if possible, whereby about >=60% of the hydrogen contained is removed. Thence, cooling wind is blown into the slow cooling furnace, whereby the billet is subjected to force-cooling.Thereby, the required cooling time is reduced by about >=30% without lowering dehydrogenation efficiency.
JP6631780A 1980-05-19 1980-05-19 Slow cooling method for steel material Granted JPS56163217A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6631780A JPS56163217A (en) 1980-05-19 1980-05-19 Slow cooling method for steel material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6631780A JPS56163217A (en) 1980-05-19 1980-05-19 Slow cooling method for steel material

Publications (2)

Publication Number Publication Date
JPS56163217A true JPS56163217A (en) 1981-12-15
JPS5750851B2 JPS5750851B2 (en) 1982-10-29

Family

ID=13312325

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6631780A Granted JPS56163217A (en) 1980-05-19 1980-05-19 Slow cooling method for steel material

Country Status (1)

Country Link
JP (1) JPS56163217A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012036486A (en) * 2010-08-11 2012-02-23 Sumitomo Metal Ind Ltd Dehydrogenation method of continuous casting piece

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5911025A (en) * 1982-07-12 1984-01-20 Hitachi Ltd Resistance circuit in semiconductor integrated circuit
JP2007245261A (en) * 2006-03-14 2007-09-27 Jfe Steel Kk Method for cutting thick steel plate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012036486A (en) * 2010-08-11 2012-02-23 Sumitomo Metal Ind Ltd Dehydrogenation method of continuous casting piece

Also Published As

Publication number Publication date
JPS5750851B2 (en) 1982-10-29

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