FR2236946A1 - Water-cooled rollers in furnaces for hot-galvanising - to prevent defects on steel strip due to oxide sintering on rolls - Google Patents

Water-cooled rollers in furnaces for hot-galvanising - to prevent defects on steel strip due to oxide sintering on rolls

Info

Publication number
FR2236946A1
FR2236946A1 FR7325123A FR7325123A FR2236946A1 FR 2236946 A1 FR2236946 A1 FR 2236946A1 FR 7325123 A FR7325123 A FR 7325123A FR 7325123 A FR7325123 A FR 7325123A FR 2236946 A1 FR2236946 A1 FR 2236946A1
Authority
FR
France
Prior art keywords
galvanising
rolls
water
steel strip
furnaces
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
FR7325123A
Other languages
French (fr)
Other versions
FR2236946B1 (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.)
JFE Engineering Corp
Original Assignee
Nippon Kokan Ltd
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 Nippon Kokan Ltd filed Critical Nippon Kokan Ltd
Priority to FR7325123A priority Critical patent/FR2236946A1/en
Publication of FR2236946A1 publication Critical patent/FR2236946A1/en
Application granted granted Critical
Publication of FR2236946B1 publication Critical patent/FR2236946B1/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
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0012—Rolls; Roll arrangements
    • 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
    • C21D9/562—Details
    • C21D9/563—Rolls; Drums; Roll arrangements

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)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

During the continuous galvanising of strip, iron oxide and other foreign matter is carried into the pre-heating furnace onto the rolls. The heating conditions are such that the oxides etc. can sinter onto the rolls causing projections which dent the steel strip, making defects which are clearly visible after galvanising. This problem can be avoided by water-cooling the rollers so that their max. temp. is 200 degrees C. and this method can be used in a non-oxidising furnace or in a reducing-atmos.
FR7325123A 1973-07-09 1973-07-09 Water-cooled rollers in furnaces for hot-galvanising - to prevent defects on steel strip due to oxide sintering on rolls Granted FR2236946A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7325123A FR2236946A1 (en) 1973-07-09 1973-07-09 Water-cooled rollers in furnaces for hot-galvanising - to prevent defects on steel strip due to oxide sintering on rolls

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7325123A FR2236946A1 (en) 1973-07-09 1973-07-09 Water-cooled rollers in furnaces for hot-galvanising - to prevent defects on steel strip due to oxide sintering on rolls

Publications (2)

Publication Number Publication Date
FR2236946A1 true FR2236946A1 (en) 1975-02-07
FR2236946B1 FR2236946B1 (en) 1978-04-14

Family

ID=9122275

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7325123A Granted FR2236946A1 (en) 1973-07-09 1973-07-09 Water-cooled rollers in furnaces for hot-galvanising - to prevent defects on steel strip due to oxide sintering on rolls

Country Status (1)

Country Link
FR (1) FR2236946A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550172A1 (en) * 1983-08-05 1985-02-08 Stein Heurtey Roller made of non-metallic material, with metal end-pieces, for heat treatment ovens

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1973431A (en) * 1932-12-07 1934-09-11 Johnson Bronze Co Method and apparatus for coating metal strip
FR1300682A (en) * 1961-05-15 1962-08-03 Blaw Knox Co Conveyor rollers for furnaces

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1973431A (en) * 1932-12-07 1934-09-11 Johnson Bronze Co Method and apparatus for coating metal strip
FR1300682A (en) * 1961-05-15 1962-08-03 Blaw Knox Co Conveyor rollers for furnaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550172A1 (en) * 1983-08-05 1985-02-08 Stein Heurtey Roller made of non-metallic material, with metal end-pieces, for heat treatment ovens

Also Published As

Publication number Publication date
FR2236946B1 (en) 1978-04-14

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Legal Events

Date Code Title Description
ST Notification of lapse