EP0803583A3 - Primary cooling method in continuously annealing steel strips - Google Patents

Primary cooling method in continuously annealing steel strips Download PDF

Info

Publication number
EP0803583A3
EP0803583A3 EP97105044A EP97105044A EP0803583A3 EP 0803583 A3 EP0803583 A3 EP 0803583A3 EP 97105044 A EP97105044 A EP 97105044A EP 97105044 A EP97105044 A EP 97105044A EP 0803583 A3 EP0803583 A3 EP 0803583A3
Authority
EP
European Patent Office
Prior art keywords
gas
cooling
steel strips
primary cooling
continuously annealing
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
EP97105044A
Other languages
German (de)
French (fr)
Other versions
EP0803583B1 (en
EP0803583B2 (en
EP0803583A2 (en
Inventor
Tatsunori c/o Nippon Steel Corporation Mine
Koichi c/o Nippon Steel Corporation Sakurai
Kouichi c/o Nippon Steel Corporation Waki
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
Nippon Steel Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=15044183&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0803583(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of EP0803583A2 publication Critical patent/EP0803583A2/en
Publication of EP0803583A3 publication Critical patent/EP0803583A3/en
Publication of EP0803583B1 publication Critical patent/EP0803583B1/en
Application granted granted Critical
Publication of EP0803583B2 publication Critical patent/EP0803583B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • 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
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • 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
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching

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 Strip Materials And Filament Materials (AREA)

Abstract

In a primary cooling method in continuously annealing steel strips which comprises a heating step (A), a soaking step (B), a primary cooling step (C) including at least a rapid cooling step in a second half thereof, an overaging step (D), and a final cooling step (E), inert atmosphere gas containing H2 gas is employed as cooling gas for use in the rapid cooling step and concentration of the H2 gas is switched between two ranges of low and high concentrations of H2 gas, depending on the required cooling rate of the rapid cooling step corresponding to the product grades of steel strips (26). Accordingly, the consumption of expensive H2 gas is reduced thus enhancing the economy of the cooling operation while assuring the safety and efficiency of the primary cooling operation. <IMAGE>
EP97105044A 1996-04-26 1997-03-25 Primary cooling method in continuously annealing steel strips Expired - Lifetime EP0803583B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP13085196 1996-04-26
JP13085196 1996-04-26
JP130851/96 1996-04-26

Publications (4)

Publication Number Publication Date
EP0803583A2 EP0803583A2 (en) 1997-10-29
EP0803583A3 true EP0803583A3 (en) 1999-01-20
EP0803583B1 EP0803583B1 (en) 2003-07-23
EP0803583B2 EP0803583B2 (en) 2009-12-16

Family

ID=15044183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97105044A Expired - Lifetime EP0803583B2 (en) 1996-04-26 1997-03-25 Primary cooling method in continuously annealing steel strips

Country Status (3)

Country Link
EP (1) EP0803583B2 (en)
AT (1) ATE245710T1 (en)
DE (1) DE69723608T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9929956D0 (en) 1999-12-17 2000-02-09 Boc Group Plc Qenching heated metallic objects
US6533996B2 (en) * 2001-02-02 2003-03-18 The Boc Group, Inc. Method and apparatus for metal processing
JP4593976B2 (en) 2004-05-31 2010-12-08 株式会社神戸製鋼所 Gas jet cooling device for steel plate in continuous annealing furnace
FR2876710B1 (en) 2004-10-19 2014-12-26 Kappa Thermline METHOD AND DEVICE FOR LIMITING THE VIBRATION OF STEEL OR ALUMINUM BANDS IN GAS OR AIR BLOWING COOLING ZONES
DE102013114578A1 (en) 2013-12-19 2015-06-25 Sandvik Materials Technology Deutschland Gmbh Annealing furnace and method for annealing a steel strand

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182050A2 (en) * 1984-11-14 1986-05-28 Nippon Steel Corporation Strip cooling apparatus for continuous annealing furnace
DE3736501C1 (en) * 1987-10-28 1988-06-09 Degussa Process for the heat treatment of metallic workpieces
US5137586A (en) * 1991-01-02 1992-08-11 Klink James H Method for continuous annealing of metal strips
JPH06346156A (en) * 1993-06-07 1994-12-20 Nippon Steel Corp Method for cooling steel sheet by gas jet
WO1997024468A1 (en) * 1995-12-26 1997-07-10 Nippon Steel Corporation Primary cooling method in continuously annealing steel strip

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182050A2 (en) * 1984-11-14 1986-05-28 Nippon Steel Corporation Strip cooling apparatus for continuous annealing furnace
DE3736501C1 (en) * 1987-10-28 1988-06-09 Degussa Process for the heat treatment of metallic workpieces
US5137586A (en) * 1991-01-02 1992-08-11 Klink James H Method for continuous annealing of metal strips
JPH06346156A (en) * 1993-06-07 1994-12-20 Nippon Steel Corp Method for cooling steel sheet by gas jet
WO1997024468A1 (en) * 1995-12-26 1997-07-10 Nippon Steel Corporation Primary cooling method in continuously annealing steel strip

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 095, no. 003 28 April 1995 (1995-04-28) *

Also Published As

Publication number Publication date
EP0803583B1 (en) 2003-07-23
DE69723608T2 (en) 2004-05-13
EP0803583B2 (en) 2009-12-16
ATE245710T1 (en) 2003-08-15
EP0803583A2 (en) 1997-10-29
DE69723608T3 (en) 2010-07-01
DE69723608D1 (en) 2003-08-28

Similar Documents

Publication Publication Date Title
AU3394593A (en) A smelting reduction method with high productivity
AU695225B2 (en) Process and equipment for producing iron carbide
CA2165820A1 (en) High-Strength Steel Sheet Suitable for Deep Drawing and Process for Producing the Same
AU6439996A (en) Process for heat treatment of a steel rail
ATE182400T1 (en) ARC FURNACE WITH DIFFERENT ENERGY SOURCES AND PROCESSES FOR ITS OPERATION
CA2050857A1 (en) Apparatus for treating the surface of workpieces by means of a plasma torch
EP0803583A3 (en) Primary cooling method in continuously annealing steel strips
TW363937B (en) A method for decreasing the metal impurities in the ozone gas piping
ES2023808B3 (en) Procedure and installation for the operation of a grinding installation.
ES2161398T3 (en) PROCEDURE FOR CARBURATION OF METAL PARTS IN AN EMPTY OVEN.
CA2261140A1 (en) Metal reduction and melting process
CZ94995A3 (en) Operation method of a cooling plant
EP0788821A3 (en) Method for increasing the density of a spray-dried polymeric composition
TW357255B (en) Process for low temperature air separation
ES2142519T3 (en) PROCEDURE FOR NITRURATION AND / OR NITROCARBURATION OF METAL PARTS.
AU4379797A (en) Steel, method for its manufacture, its use and product made from steel
ATE189271T1 (en) METHOD FOR PLASMA CARBURIZING METALLIC WORKPIECES
TW265291B (en) Process of brazing ferrous metals with a brazing paste or preform
RU2070939C1 (en) Method for alloying of steel and alloys with nitrogen
CA2183089A1 (en) Process for avoiding stickers in the annealing of cold strip under hydrogen-containing atmospheres
SE9603776D0 (en) Method and apparatus for controlling the gas atmosphere in a heat treatment furnace
AU2002366345A1 (en) Method for preventing adhesive substances and scratches from occurring during recrystallization annealing of cold strips
CA2289616A1 (en) Method and device for producing a controlled atmosphere with low oxygen partial pressure
Kurokawa Present and future technologies for producing ultra-low carbon steel
Masuda et al. Production and evaluation of high cleanliness steel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT DE GB

17P Request for examination filed

Effective date: 19971027

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT DE GB

17Q First examination report despatched

Effective date: 20010126

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT DE GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69723608

Country of ref document: DE

Date of ref document: 20030828

Kind code of ref document: P

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

26 Opposition filed

Opponent name: DREVER INTERNATIONAL S.A.

Effective date: 20040423

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PLBP Opposition withdrawn

Free format text: ORIGINAL CODE: 0009264

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 20091216

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT DE GB

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 69723608

Country of ref document: DE

Representative=s name: VOSSIUS & PARTNER PATENTANWAELTE RECHTSANWAELT, DE

Effective date: 20130227

Ref country code: DE

Ref legal event code: R082

Ref document number: 69723608

Country of ref document: DE

Representative=s name: VOSSIUS & PARTNER, DE

Effective date: 20130227

Ref country code: DE

Ref legal event code: R081

Ref document number: 69723608

Country of ref document: DE

Owner name: NIPPON STEEL & SUMITOMO METAL CORPORATION, JP

Free format text: FORMER OWNER: NIPPON STEEL CORP., TOKIO/TOKYO, JP

Effective date: 20130227

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20160322

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20160323

Year of fee payment: 20

Ref country code: AT

Payment date: 20160225

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69723608

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20170324

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK07

Ref document number: 245710

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170325

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20170324