JPS54100916A - Quench and temper of continuously cast high tensile steel material - Google Patents

Quench and temper of continuously cast high tensile steel material

Info

Publication number
JPS54100916A
JPS54100916A JP753978A JP753978A JPS54100916A JP S54100916 A JPS54100916 A JP S54100916A JP 753978 A JP753978 A JP 753978A JP 753978 A JP753978 A JP 753978A JP S54100916 A JPS54100916 A JP S54100916A
Authority
JP
Japan
Prior art keywords
temperature
steel material
zone
high tensile
continuously cast
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
JP753978A
Other languages
Japanese (ja)
Other versions
JPS5740887B2 (en
Inventor
Kiyoshi Bessho
Mitsuharu Fujimoto
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 JP753978A priority Critical patent/JPS54100916A/en
Publication of JPS54100916A publication Critical patent/JPS54100916A/en
Publication of JPS5740887B2 publication Critical patent/JPS5740887B2/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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/78—Combined heat-treatments not provided for above

Abstract

PURPOSE:Continuously cast steel material is quenched from a gamma zone temperature, then requenched from a alpha+gamma zone temperature and tempered at a temperature of below A1 modification point, thus eliminating surface crack defects from the high tensile steel material. CONSTITUTION:Continously cast and rolled steel materials have segregated C, Mn, P, S, etc., produced in the casting process, at the center area of the materials. The steel material is first quanched into water from a temperature of gamma zone (austenite zone), or about 930 deg.C. The material is then maintained at a temperature of 780 deg.C which is alpha+gamma zone for about 30 minutes, to diffuse C, Mn, P, and S to the central area thereby removing temperature segregation. From this temperature the material is quenched and then tempered at about 650 deg.C which is below A1 modification point (723 deg.C) for about 30 minutes. The process thus prevents surface crack occurrence which otherwise may caused by segregated components.
JP753978A 1978-01-25 1978-01-25 Quench and temper of continuously cast high tensile steel material Granted JPS54100916A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP753978A JPS54100916A (en) 1978-01-25 1978-01-25 Quench and temper of continuously cast high tensile steel material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP753978A JPS54100916A (en) 1978-01-25 1978-01-25 Quench and temper of continuously cast high tensile steel material

Publications (2)

Publication Number Publication Date
JPS54100916A true JPS54100916A (en) 1979-08-09
JPS5740887B2 JPS5740887B2 (en) 1982-08-31

Family

ID=11668585

Family Applications (1)

Application Number Title Priority Date Filing Date
JP753978A Granted JPS54100916A (en) 1978-01-25 1978-01-25 Quench and temper of continuously cast high tensile steel material

Country Status (1)

Country Link
JP (1) JPS54100916A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1311087C (en) * 2004-07-06 2007-04-18 中国北车集团永济电机厂 Heat treatment method for solving banded structure defect of medium carbon alloy steel

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5918390A (en) * 1982-07-23 1984-01-30 Nissan Motor Co Ltd Radiator
JPH0338587U (en) * 1989-08-23 1991-04-15
JP2586229Y2 (en) * 1996-09-20 1998-12-02 昭和アルミニウム株式会社 Heat exchanger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1311087C (en) * 2004-07-06 2007-04-18 中国北车集团永济电机厂 Heat treatment method for solving banded structure defect of medium carbon alloy steel

Also Published As

Publication number Publication date
JPS5740887B2 (en) 1982-08-31

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