ITRM20010678A1 - PROCEDURE FOR THE ONLINE RECRYSTALLIZATION OF RAW SOLIDIFICATION TAPES IN CARBON STEEL AND IN ALLOY AND BONDED STEEL - Google Patents

PROCEDURE FOR THE ONLINE RECRYSTALLIZATION OF RAW SOLIDIFICATION TAPES IN CARBON STEEL AND IN ALLOY AND BONDED STEEL

Info

Publication number
ITRM20010678A1
ITRM20010678A1 IT2001RM000678A ITRM20010678A ITRM20010678A1 IT RM20010678 A1 ITRM20010678 A1 IT RM20010678A1 IT 2001RM000678 A IT2001RM000678 A IT 2001RM000678A IT RM20010678 A ITRM20010678 A IT RM20010678A IT RM20010678 A1 ITRM20010678 A1 IT RM20010678A1
Authority
IT
Italy
Prior art keywords
recrystallization
strip
strips
steel
rolling
Prior art date
Application number
IT2001RM000678A
Other languages
Italian (it)
Inventor
Ettore Anelli
Giorgio Porcu
Luca Sartini
Original Assignee
Acciai Speciali Terni Spa
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 Acciai Speciali Terni Spa filed Critical Acciai Speciali Terni Spa
Priority to IT2001RM000678A priority Critical patent/ITRM20010678A1/en
Publication of ITRM20010678A0 publication Critical patent/ITRM20010678A0/en
Priority to AT02793320T priority patent/ATE293174T1/en
Priority to PCT/IT2002/000728 priority patent/WO2003062476A1/en
Priority to DE60203733T priority patent/DE60203733T2/en
Priority to EP02793320A priority patent/EP1444371B1/en
Priority to CNB02825466XA priority patent/CN1296498C/en
Publication of ITRM20010678A1 publication Critical patent/ITRM20010678A1/en

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
    • C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
    • C21D8/0215—Rapid solidification; Thin strip casting
    • 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
    • C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
    • 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
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0273—Final recrystallisation annealing
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
  • Heat Treatment Of Steel (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention refers to an in-line process for the making of strips in carbon steel and in low-alloyed steel by a recrystallization (rolling and annealing) treatment of solidified coarse strips, having a coarse structure, aimed at inducing an advanced recrystallization of the material with homogenizing, refining and checking of the end microstructure, and the entailed improvement of the mechanical properties, in terms of a mix of strength and ductility/cold formability, and of the reproducibility thereof. This process comprises the following steps: casting, in a twin-roll continuous casting machine (A) of strips having a thickness ranging from 1 to 6 mm and a composition, expressed as percent by mass, comprising the following components: 0.02-0.20 C; 0.1-1.6 Mn; 0.02-2.00 Si; <0.05 A1; <0.03 S; <0.1 P; 0.01-1.5 Cr; 0.01-0.5 Ni; <0.5 Mo; 0.003-0.012 N, with substantially Fe q.s. to 100; controlled cooling of the strip in the section comprised between the casting rolls and a rolling system (E); holding the strip at a controlled temperature in an insulated system (F) comprised between an outlet of the rolling system (E) and an inlet in a heating system (G); heating the strip with said heating system (G) at temperatures ranging from 670 to 1150 °C for times ranging from 5 to 40 s, so as to attain a >95% b/v strip recrystallization; ▪ controlled cooling in the section comprised between an outlet of said heating system (G) and a wrapping system.
IT2001RM000678A 2001-11-15 2001-11-15 PROCEDURE FOR THE ONLINE RECRYSTALLIZATION OF RAW SOLIDIFICATION TAPES IN CARBON STEEL AND IN ALLOY AND BONDED STEEL ITRM20010678A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
IT2001RM000678A ITRM20010678A1 (en) 2001-11-15 2001-11-15 PROCEDURE FOR THE ONLINE RECRYSTALLIZATION OF RAW SOLIDIFICATION TAPES IN CARBON STEEL AND IN ALLOY AND BONDED STEEL
AT02793320T ATE293174T1 (en) 2001-11-15 2002-11-15 IN-LINE PROCESS FOR RECRYSTALLIZING SOLIDATED ROUGH STRIPS IN UNALLOYED STEEL AND LOW ALLOY STEEL
PCT/IT2002/000728 WO2003062476A1 (en) 2001-11-15 2002-11-15 In-line process for the recrystallization of solidified coarse strips in carbon steel and in low-alloyed steel and so obtainable strips having a highly checked microstructure
DE60203733T DE60203733T2 (en) 2001-11-15 2002-11-15 IN-LINE METHOD FOR RE-CRYSTALLIZING GROWN GROBS IN UNBALANCED STEEL AND LOW ALLOY STEEL
EP02793320A EP1444371B1 (en) 2001-11-15 2002-11-15 In-line process for the recrystallization of solidified coarse strips in carbon steel and in low-alloyed steel
CNB02825466XA CN1296498C (en) 2001-11-15 2002-11-15 In-line process for the recrystallization of solidified coarse strips in carbon steel and in low-alloyed steel and so obtainable strips having a highly checked microstructure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2001RM000678A ITRM20010678A1 (en) 2001-11-15 2001-11-15 PROCEDURE FOR THE ONLINE RECRYSTALLIZATION OF RAW SOLIDIFICATION TAPES IN CARBON STEEL AND IN ALLOY AND BONDED STEEL

Publications (2)

Publication Number Publication Date
ITRM20010678A0 ITRM20010678A0 (en) 2001-11-15
ITRM20010678A1 true ITRM20010678A1 (en) 2003-05-15

Family

ID=11455880

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2001RM000678A ITRM20010678A1 (en) 2001-11-15 2001-11-15 PROCEDURE FOR THE ONLINE RECRYSTALLIZATION OF RAW SOLIDIFICATION TAPES IN CARBON STEEL AND IN ALLOY AND BONDED STEEL

Country Status (6)

Country Link
EP (1) EP1444371B1 (en)
CN (1) CN1296498C (en)
AT (1) ATE293174T1 (en)
DE (1) DE60203733T2 (en)
IT (1) ITRM20010678A1 (en)
WO (1) WO2003062476A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005063058B3 (en) * 2005-12-29 2007-05-24 Thyssenkrupp Nirosta Gmbh Producing cold rolled strip of ferritic stainless steel comprises controlled cooling before cold rolling
CN103305759B (en) * 2012-03-14 2014-10-29 宝山钢铁股份有限公司 Thin strip continuous casting 700MPa grade high-strength weather-resistant steel manufacturing method
CN103305754B (en) * 2012-03-14 2015-09-23 宝山钢铁股份有限公司 A kind of age hardening thin strap continuous casting low-carbon microalloy steel band manufacture method
CN103305770B (en) * 2012-03-14 2015-12-09 宝山钢铁股份有限公司 A kind of manufacture method of thin strap continuous casting 550MPa level high-strength air corrosion-resistant steel band
CN103302255B (en) * 2012-03-14 2015-10-28 宝山钢铁股份有限公司 A kind of thin strap continuous casting 700MPa level high-strength air corrosion-resistant steel manufacture method
EP2821520B1 (en) * 2013-07-03 2020-11-11 ThyssenKrupp Steel Europe AG Method for the coating of steel flat products with a metallic protective layer
JP6452037B2 (en) * 2014-02-04 2019-01-16 日立金属株式会社 Casting method and casting apparatus
BR112017012803B1 (en) * 2014-12-16 2021-10-05 Greer Steel Company STEEL COMPOSITION FOR ANNULAR PERCUSSION AMMUNITION CARTRIDGES AND METHOD OF PROCESSING SUCH STEEL COMPOSITION FOR USE IN AN ANNULAR PERCUSSION CARTRIDGE
CN112517863A (en) * 2019-09-19 2021-03-19 宝山钢铁股份有限公司 High-strength thin-specification patterned steel plate/belt and manufacturing method thereof
CN114669613B (en) * 2022-04-19 2023-06-20 安徽工业大学 Flexible roller contact type Bao Daizu cooling method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9505870A (en) * 1994-04-04 1996-02-21 Nippon Steel Corp Double cylinder continuous casting method and apparatus
JP2750096B2 (en) * 1995-05-08 1998-05-13 新日本製鐵株式会社 Strip continuous casting hot rolling heat treatment pickling equipment and method for producing pickling coil
JP3709003B2 (en) * 1996-01-26 2005-10-19 新日本製鐵株式会社 Thin plate continuous casting method
TW459053B (en) * 1997-12-19 2001-10-11 Exxon Production Research Co Ultra-high strength dual phase steels with excellent cryogenic temperature toughness

Also Published As

Publication number Publication date
DE60203733D1 (en) 2005-05-19
CN1296498C (en) 2007-01-24
CN1606629A (en) 2005-04-13
DE60203733T2 (en) 2006-02-09
EP1444371B1 (en) 2005-04-13
EP1444371A1 (en) 2004-08-11
ITRM20010678A0 (en) 2001-11-15
WO2003062476A1 (en) 2003-07-31
ATE293174T1 (en) 2005-04-15

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