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FR2375334A1 - Hot dip coating of steel strip without flux - by prior heat treatment in controlled atmos. via coke oven gas with high thermal efficiency (BR 8.8.78) - Google Patents

Hot dip coating of steel strip without flux - by prior heat treatment in controlled atmos. via coke oven gas with high thermal efficiency (BR 8.8.78)

Info

Publication number
FR2375334A1
FR2375334A1 FR7738888A FR7738888A FR2375334A1 FR 2375334 A1 FR2375334 A1 FR 2375334A1 FR 7738888 A FR7738888 A FR 7738888A FR 7738888 A FR7738888 A FR 7738888A FR 2375334 A1 FR2375334 A1 FR 2375334A1
Authority
FR
France
Prior art keywords
zone
contg
strip
layer
flux
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
FR7738888A
Other languages
French (fr)
Other versions
FR2375334B1 (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.)
Armco Inc
Original Assignee
Armco Inc
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
Priority claimed from US05/753,622 external-priority patent/US4123291A/en
Priority claimed from US05/753,623 external-priority patent/US4123292A/en
Application filed by Armco Inc filed Critical Armco Inc
Publication of FR2375334A1 publication Critical patent/FR2375334A1/en
Application granted granted Critical
Publication of FR2375334B1 publication Critical patent/FR2375334B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/38—Wires; Tubes
    • 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
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • C23C2/0222—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating in a reactive atmosphere, e.g. oxidising or reducing atmosphere
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
    • C23C2/0224—Two or more thermal pretreatments

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

The surfaces of steel sheet or strip are prepd. prior to coating by immersion in a hot molten metal bath (M) without using a flux. Prepn. consists of feeding the strip through two successive heating zones (a,b); and then through a cooling zone (c) with a protective atmos. in which the strip is cooled to ca. the temp. of bath (M). The capacity of the steel strip to absorb radiant heating energy in zones (a,b) is increased by forming a visible coating (a1), contg. iron oxide, in zone (a), and preserving layer (a1) in zone (b). Layer (a1) is pref. completely reduced in zone (c) by an atmos. contg. by vol. min 10% H2. Layer (a) may consist of iron oxysulphide,obtd. by using combustion gases in zone (a) contg. max. 2% free O2 and 0-36 g of sulphur per m3, esp. by burning fuel in air to attain min. 1205 degrees C in zone (a), the colour of layer (a1) being dark yellow to blue. Zone (b) is pref. separate from zone (a) and contains below 5% H2. See also 2375335. Used for all types of metal (M), e.g. Al or its alloys; Zn or its alloys; Pb-Sn alloys. Coke oven gas contg. sulphur can be used in the process and a substantial increase in thermal efficiency is obtd.
FR7738888A 1976-12-23 1977-12-22 Hot dip coating of steel strip without flux - by prior heat treatment in controlled atmos. via coke oven gas with high thermal efficiency (BR 8.8.78) Granted FR2375334A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/753,622 US4123291A (en) 1976-12-23 1976-12-23 Method of treating steel strip and sheet surfaces, in sulfur-bearing atmosphere, for metallic coating
US05/753,623 US4123292A (en) 1976-12-23 1976-12-23 Method of treating steel strip and sheet surfaces for metallic coating

Publications (2)

Publication Number Publication Date
FR2375334A1 true FR2375334A1 (en) 1978-07-21
FR2375334B1 FR2375334B1 (en) 1980-03-21

Family

ID=27115782

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7738888A Granted FR2375334A1 (en) 1976-12-23 1977-12-22 Hot dip coating of steel strip without flux - by prior heat treatment in controlled atmos. via coke oven gas with high thermal efficiency (BR 8.8.78)

Country Status (5)

Country Link
JP (1) JPS53102236A (en)
AU (1) AU509460B2 (en)
BR (1) BR7708572A (en)
CA (1) CA1104910A (en)
FR (1) FR2375334A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2433588A1 (en) * 1978-08-17 1980-03-14 Selas Corp Of America PROCESS FOR REDUCING THE FORMATION OF METAL OXIDE ON A HOT-COATED METAL SHEET, AND FURNACE FOR CARRYING OUT THE METHOD
FR2470803A1 (en) * 1979-12-05 1981-06-12 Nippon Steel Corp METHOD OF CONTINUOUSLY ANNUCING A LOW CARBON NUT STEEL STRIP
EP0795616A1 (en) * 1996-03-13 1997-09-17 STEIN HEURTEY, Société Anonyme: Process for continuously heat treating metal strip in different atmospheres
US7384489B2 (en) 2002-09-13 2008-06-10 Drever International S.A. Atmosphere control during continuous heat treatment of metal strips
WO2016156125A1 (en) * 2015-04-02 2016-10-06 Cockerill Maintenance & Ingénierie S.A. Method and device for reaction control
EP3135778A1 (en) * 2015-08-31 2017-03-01 Cockerill Maintenance & Ingenierie S.A. Method and device for reaction control

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6260825A (en) * 1985-09-10 1987-03-17 Kawasaki Steel Corp Preheating method in continuous heat treatment of steel strip

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR845086A (en) * 1938-02-18 1939-08-10 Method and device for the heat treatment of metallic objects
FR2272193A1 (en) * 1974-05-24 1975-12-19 Armco Steel Corp
FR2282471A1 (en) * 1974-08-22 1976-03-19 Armco Steel Corp PROCESS FOR THE PREPARATION OF A STRIP OF CARBON STEEL WITH A VIEW TO THE DEPOSIT OF A QUENCH COATING WITHOUT FLUX

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52155002A (en) * 1976-06-18 1977-12-23 Torio Kk Receiver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR845086A (en) * 1938-02-18 1939-08-10 Method and device for the heat treatment of metallic objects
FR2272193A1 (en) * 1974-05-24 1975-12-19 Armco Steel Corp
FR2282471A1 (en) * 1974-08-22 1976-03-19 Armco Steel Corp PROCESS FOR THE PREPARATION OF A STRIP OF CARBON STEEL WITH A VIEW TO THE DEPOSIT OF A QUENCH COATING WITHOUT FLUX

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2433588A1 (en) * 1978-08-17 1980-03-14 Selas Corp Of America PROCESS FOR REDUCING THE FORMATION OF METAL OXIDE ON A HOT-COATED METAL SHEET, AND FURNACE FOR CARRYING OUT THE METHOD
FR2470803A1 (en) * 1979-12-05 1981-06-12 Nippon Steel Corp METHOD OF CONTINUOUSLY ANNUCING A LOW CARBON NUT STEEL STRIP
EP0795616A1 (en) * 1996-03-13 1997-09-17 STEIN HEURTEY, Société Anonyme: Process for continuously heat treating metal strip in different atmospheres
FR2746112A1 (en) * 1996-03-13 1997-09-19 Stein Heurtey METHOD OF CONTINUOUS HEAT TREATMENT OF METAL STRIPS IN ATMOSPHERES OF DIFFERENT NATURE
US5798007A (en) * 1996-03-13 1998-08-25 Stein Heurtey Process and apparatus for the continuous heat treatment of a metal strip travelling in a different atmosphere
US7384489B2 (en) 2002-09-13 2008-06-10 Drever International S.A. Atmosphere control during continuous heat treatment of metal strips
WO2016156125A1 (en) * 2015-04-02 2016-10-06 Cockerill Maintenance & Ingénierie S.A. Method and device for reaction control
RU2705846C2 (en) * 2015-04-02 2019-11-12 Кокрий Ментенанс Эт Энженьери С.А. Reaction control method and device
US10801086B2 (en) 2015-04-02 2020-10-13 Cockerill Maintenance & Ingenierie S.A. Method and device for reaction control
EP3135778A1 (en) * 2015-08-31 2017-03-01 Cockerill Maintenance & Ingenierie S.A. Method and device for reaction control

Also Published As

Publication number Publication date
AU509460B2 (en) 1980-05-15
BR7708572A (en) 1978-08-08
JPS53102236A (en) 1978-09-06
CA1104910A (en) 1981-07-14
JPS5723748B2 (en) 1982-05-20
FR2375334B1 (en) 1980-03-21
AU3174177A (en) 1979-06-28

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Legal Events

Date Code Title Description
CD Change of name or company name
TP Transmission of property
ST Notification of lapse