FR2239527A1 - Mild steel plate with high elastic limit - obtained by quenching the plate as it leaves the hot rolling train - Google Patents

Mild steel plate with high elastic limit - obtained by quenching the plate as it leaves the hot rolling train

Info

Publication number
FR2239527A1
FR2239527A1 FR7328354A FR7328354A FR2239527A1 FR 2239527 A1 FR2239527 A1 FR 2239527A1 FR 7328354 A FR7328354 A FR 7328354A FR 7328354 A FR7328354 A FR 7328354A FR 2239527 A1 FR2239527 A1 FR 2239527A1
Authority
FR
France
Prior art keywords
quenching
degrees
plate
high elastic
max
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
FR7328354A
Other languages
French (fr)
Other versions
FR2239527B1 (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.)
USINOR SA
Original Assignee
USINOR SA
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 USINOR SA filed Critical USINOR SA
Priority to FR7328354A priority Critical patent/FR2239527A1/en
Publication of FR2239527A1 publication Critical patent/FR2239527A1/en
Application granted granted Critical
Publication of FR2239527B1 publication Critical patent/FR2239527B1/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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling

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 Steel (AREA)

Abstract

The steel contains, apart from impurities, or elements having an effect on the hardenability, 0.25% carbon max; 0.7-1.5, esp. 1-1.2% Mn; and immediately after hot-rolling the plates are quenched at a speed above 20 degrees C/sec. The quenching operation may also take place during a rolling cycle. When quenching occurs after hot-rolling, the pref. quenching temp. is 750-850 degrees, esp. 780-850 degrees C and after quenching the max. temp of the steel should be 350 degrees C. The carbon content may be 0.15% max. depending on the elastic-limit and impact-strength required and in all cases the pref. quenching speed id above 30 degrees C/sec. Plate obtd is used for large dia pipe-lines, shipbuilding and constructional steel-work. high elastic limit, without the addn of alloying elements or extra heat-treatment is obtd.
FR7328354A 1973-08-02 1973-08-02 Mild steel plate with high elastic limit - obtained by quenching the plate as it leaves the hot rolling train Granted FR2239527A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7328354A FR2239527A1 (en) 1973-08-02 1973-08-02 Mild steel plate with high elastic limit - obtained by quenching the plate as it leaves the hot rolling train

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7328354A FR2239527A1 (en) 1973-08-02 1973-08-02 Mild steel plate with high elastic limit - obtained by quenching the plate as it leaves the hot rolling train

Publications (2)

Publication Number Publication Date
FR2239527A1 true FR2239527A1 (en) 1975-02-28
FR2239527B1 FR2239527B1 (en) 1978-01-20

Family

ID=9123518

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7328354A Granted FR2239527A1 (en) 1973-08-02 1973-08-02 Mild steel plate with high elastic limit - obtained by quenching the plate as it leaves the hot rolling train

Country Status (1)

Country Link
FR (1) FR2239527A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2307879A1 (en) * 1975-04-18 1976-11-12 Siderurgie Fse Inst Rech Cryogenic steel sheet mfr. - by rapid cooling immediately after rolling, then annealing
FR2446323A1 (en) * 1979-01-12 1980-08-08 Nippon Steel Corp PROCESS FOR THE MANUFACTURE OF TWO-PHASE STEEL SHEETS HAVING HIGH TENSILE STRENGTH AND A LOW-ELASTIC LIMIT / TENSILE STRENGTH AS WELL AS EXCELLENT AGING PROPERTIES AFTER WORK, AND THE PRODUCT THUS OBTAINED
US4285741A (en) * 1978-06-16 1981-08-25 Nippon Steel Corporation Process for producing high-strength, low yield ratio and high ductility dual-phase structure steel sheets

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2307879A1 (en) * 1975-04-18 1976-11-12 Siderurgie Fse Inst Rech Cryogenic steel sheet mfr. - by rapid cooling immediately after rolling, then annealing
US4285741A (en) * 1978-06-16 1981-08-25 Nippon Steel Corporation Process for producing high-strength, low yield ratio and high ductility dual-phase structure steel sheets
FR2446323A1 (en) * 1979-01-12 1980-08-08 Nippon Steel Corp PROCESS FOR THE MANUFACTURE OF TWO-PHASE STEEL SHEETS HAVING HIGH TENSILE STRENGTH AND A LOW-ELASTIC LIMIT / TENSILE STRENGTH AS WELL AS EXCELLENT AGING PROPERTIES AFTER WORK, AND THE PRODUCT THUS OBTAINED
US4614551A (en) * 1979-01-12 1986-09-30 Nippon Steel Corporation Process for producing low yield ratio, high strength two-phase steel sheet having excellent artificial ageing property after working

Also Published As

Publication number Publication date
FR2239527B1 (en) 1978-01-20

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Legal Events

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CD Change of name or company name
TP Transmission of property