WO2007013029A3 - Process for continuous annealing of steel strips - Google Patents

Process for continuous annealing of steel strips Download PDF

Info

Publication number
WO2007013029A3
WO2007013029A3 PCT/IB2006/052545 IB2006052545W WO2007013029A3 WO 2007013029 A3 WO2007013029 A3 WO 2007013029A3 IB 2006052545 W IB2006052545 W IB 2006052545W WO 2007013029 A3 WO2007013029 A3 WO 2007013029A3
Authority
WO
WIPO (PCT)
Prior art keywords
continuous annealing
steel strips
stainless steel
chromium
layer
Prior art date
Application number
PCT/IB2006/052545
Other languages
French (fr)
Other versions
WO2007013029A2 (en
Inventor
Alessandro Dulcetti
Stefano Luperi
Nicoletta Zacchetti
Stefania Bellini
Original Assignee
Ct Sviluppo Materiali Spa
Alessandro Dulcetti
Stefano Luperi
Nicoletta Zacchetti
Stefania Bellini
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 Ct Sviluppo Materiali Spa, Alessandro Dulcetti, Stefano Luperi, Nicoletta Zacchetti, Stefania Bellini filed Critical Ct Sviluppo Materiali Spa
Publication of WO2007013029A2 publication Critical patent/WO2007013029A2/en
Publication of WO2007013029A3 publication Critical patent/WO2007013029A3/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C21D1/26—Methods of 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere
    • 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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

The present invention refers to a process for continuous annealing of cold-rolled stainless steel strips of various typologies of austenitic (17.0 < %Cr < 25.0; 8.5 < %Ni < 19.8) and ferritic (11.0 < %Cr < 16.0) stainless steel allowing to obtain, with maximum productivity, a high and constant end surface grade by making a low- thickness Chromium-rich oxide layer and a markedly Chromium-depleted (dechromized) layer of the underlying matrix of easy removability by pickling.
PCT/IB2006/052545 2005-07-25 2006-07-25 Process for continuous annealing of steel strips WO2007013029A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM20050395 ITRM20050395A1 (en) 2005-07-25 2005-07-25 PROCEDURE FOR CONTINUOUS ANNEALING OF STAINLESS STEEL RIBBONS.
ITRM2005A000395 2005-07-25

Publications (2)

Publication Number Publication Date
WO2007013029A2 WO2007013029A2 (en) 2007-02-01
WO2007013029A3 true WO2007013029A3 (en) 2007-05-31

Family

ID=37670765

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/052545 WO2007013029A2 (en) 2005-07-25 2006-07-25 Process for continuous annealing of steel strips

Country Status (2)

Country Link
IT (1) ITRM20050395A1 (en)
WO (1) WO2007013029A2 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02285031A (en) * 1989-04-26 1990-11-22 Kawasaki Steel Corp Method for continuously annealing stainless steel strip
JPH0320419A (en) * 1989-06-15 1991-01-29 Kawasaki Steel Corp Method for continuously annealing stainless steel strip
JPH03249135A (en) * 1990-02-28 1991-11-07 Nisshin Steel Co Ltd Method for annealing stainless steel strip
JPH05222449A (en) * 1992-02-14 1993-08-31 Kawasaki Steel Corp Annealing method of stainless steel
EP1099771A1 (en) * 1999-05-07 2001-05-16 Matsushita Electronics Corporation Stainless steel plate for shadow mask and method for production thereof and shadow mask
JP2003171743A (en) * 2001-12-06 2003-06-20 Aichi Steel Works Ltd Duplex stainless steel having excellent strength, toughness and seawater resistance, and production method therefor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02285031A (en) * 1989-04-26 1990-11-22 Kawasaki Steel Corp Method for continuously annealing stainless steel strip
JPH0320419A (en) * 1989-06-15 1991-01-29 Kawasaki Steel Corp Method for continuously annealing stainless steel strip
JPH03249135A (en) * 1990-02-28 1991-11-07 Nisshin Steel Co Ltd Method for annealing stainless steel strip
JPH05222449A (en) * 1992-02-14 1993-08-31 Kawasaki Steel Corp Annealing method of stainless steel
EP1099771A1 (en) * 1999-05-07 2001-05-16 Matsushita Electronics Corporation Stainless steel plate for shadow mask and method for production thereof and shadow mask
JP2003171743A (en) * 2001-12-06 2003-06-20 Aichi Steel Works Ltd Duplex stainless steel having excellent strength, toughness and seawater resistance, and production method therefor

Also Published As

Publication number Publication date
ITRM20050395A1 (en) 2007-01-26
WO2007013029A2 (en) 2007-02-01

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