FR2299407A1 - High strength, very low alloy steels - with outer zone of martensite and core of pearlite and ferrite - Google Patents

High strength, very low alloy steels - with outer zone of martensite and core of pearlite and ferrite

Info

Publication number
FR2299407A1
FR2299407A1 FR7602991A FR7602991A FR2299407A1 FR 2299407 A1 FR2299407 A1 FR 2299407A1 FR 7602991 A FR7602991 A FR 7602991A FR 7602991 A FR7602991 A FR 7602991A FR 2299407 A1 FR2299407 A1 FR 2299407A1
Authority
FR
France
Prior art keywords
pearlite
ferrite
untempered
core
steel
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
FR7602991A
Other languages
French (fr)
Other versions
FR2299407B1 (en
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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 Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Publication of FR2299407A1 publication Critical patent/FR2299407A1/en
Application granted granted Critical
Publication of FR2299407B1 publication Critical patent/FR2299407B1/fr
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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods

Abstract

A steel bar which, in a section perpendicular to its longitudinal axis, possesses a microstructure consisting of at least two concentric zones, where the peripheral zone comprises tempered martensite and untempered bainite, and the central zone, or core, consists of untempered bainite and a mixt. of untempered ferrite and pearlite. The peripheral zone may itself be surrounded by a layer of pure, tempered martensite and the central zone may consist mainly of untempered ferrite and pearlite. The term bar applies to any type of steel bar, whether the steel is killed, semi-killed, or rimming steel. Wire rod or bar is used e.g. for reinforcing concrete it possesses good weldability. The bars have high mechanical props. in relation to their low content of alloying elements and are therefore low in cost.
FR7602991A 1975-01-29 1976-01-27 High strength, very low alloy steels - with outer zone of martensite and core of pearlite and ferrite Granted FR2299407A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE824961 1975-01-29

Publications (2)

Publication Number Publication Date
FR2299407A1 true FR2299407A1 (en) 1976-08-27
FR2299407B1 FR2299407B1 (en) 1980-02-08

Family

ID=3861155

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7602991A Granted FR2299407A1 (en) 1975-01-29 1976-01-27 High strength, very low alloy steels - with outer zone of martensite and core of pearlite and ferrite

Country Status (5)

Country Link
AU (1) AU507994B2 (en)
FR (1) FR2299407A1 (en)
LU (1) LU74262A1 (en)
NL (1) NL7600859A (en)
ZA (1) ZA76510B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4786338A (en) * 1985-10-31 1988-11-22 Norio Anzawa Method for cooling rolled steels

Also Published As

Publication number Publication date
AU1063276A (en) 1977-08-04
ZA76510B (en) 1977-01-26
LU74262A1 (en) 1976-07-23
NL7600859A (en) 1976-08-02
FR2299407B1 (en) 1980-02-08
AU507994B2 (en) 1980-03-06

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Legal Events

Date Code Title Description
ST Notification of lapse