GB1415478A - Method of manufacturing a flat steel product having an oxidation-resistant coating - Google Patents

Method of manufacturing a flat steel product having an oxidation-resistant coating

Info

Publication number
GB1415478A
GB1415478A GB423774A GB423774A GB1415478A GB 1415478 A GB1415478 A GB 1415478A GB 423774 A GB423774 A GB 423774A GB 423774 A GB423774 A GB 423774A GB 1415478 A GB1415478 A GB 1415478A
Authority
GB
United Kingdom
Prior art keywords
coating
sheet
heating
oxygen
oxidation
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.)
Expired
Application number
GB423774A
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.)
Cockerill SA
Original Assignee
Cockerill SA
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 Cockerill SA filed Critical Cockerill SA
Publication of GB1415478A publication Critical patent/GB1415478A/en
Priority claimed from GB1415478A external-priority patent/GB1603227A/en
Expired 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • 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
    • C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02—Extraction of non-metals
    • C21D3/04—Decarburising

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)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

1415478 Coating steel and decarburizing SOC ANON COCKERILL-OUGREEPROVIDENCE ET ESPERANCE-LONGDOZ EN ABREGE "COCKERILL" 30 Jan 1974 [30 Jan 1973] 04237/74 Heading C7D Mild steel sheet is coated with oxidationresistant material of given oxygen content, the amount of oxygen in the coating and the amount of C in the sheet and in the coating being in substantially stoichiometric proportion according to the equation 2C + O 2 # 2CO, and the coated sheet is subjected to heating in vacuo to cause diffusion of the constituents of the sheet and coating, the temperature and duration of the heating being such as to allow reaction of the said C and oxygen, and the vacuum being sufficient to allow escape of the reaction product. The coating of Cr, Ni, Co and/or Mo or their alloys with Fe, may be vacuum-deposited, flame-sprayed, or spread on as powder and compacted. Heating is typically at 950-1300‹C for 48 hrs to ¢ hr at 10<SP>-6</SP> to 10<SP>-2</SP> Torr. In an example, steel sheet 2 mm thick containing 0.075%C is wated to 100Á with Fe-72Cr containing 0.02%C and 1.5% O 2 , and heated to 1150 degrees for 12 hours at 10<SP>-4</SP> Torr in a stack, giving a coating containing 0.03- 0.04%C and about 20% Cr.
GB423774A 1973-01-30 1974-01-30 Method of manufacturing a flat steel product having an oxidation-resistant coating Expired GB1415478A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE794758 1973-01-30
GB1415478A GB1603227A (en) 1977-04-15 1978-04-11 Activating devices for releasable load

Publications (1)

Publication Number Publication Date
GB1415478A true GB1415478A (en) 1975-11-26

Family

ID=25657093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB423774A Expired GB1415478A (en) 1973-01-30 1974-01-30 Method of manufacturing a flat steel product having an oxidation-resistant coating

Country Status (1)

Country Link
GB (1) GB1415478A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee