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SE8003349L - SET FOR HEATING, HEALING OR HEATING OF METALLIC GOODS - Google Patents

SET FOR HEATING, HEALING OR HEATING OF METALLIC GOODS

Info

Publication number
SE8003349L
SE8003349L SE8003349A SE8003349A SE8003349L SE 8003349 L SE8003349 L SE 8003349L SE 8003349 A SE8003349 A SE 8003349A SE 8003349 A SE8003349 A SE 8003349A SE 8003349 L SE8003349 L SE 8003349L
Authority
SE
Sweden
Prior art keywords
gas
heating
nitrogen
hydrogen
processing gas
Prior art date
Application number
SE8003349A
Other languages
Unknown language ( )
Swedish (sv)
Inventor
R Peterson
Original Assignee
Ugnsbolaget Tabo Ab
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 Ugnsbolaget Tabo Ab filed Critical Ugnsbolaget Tabo Ab
Priority to SE8003349A priority Critical patent/SE8003349L/en
Priority to BR8108584A priority patent/BR8108584A/en
Priority to EP81901121A priority patent/EP0052113A1/en
Priority to FI814187A priority patent/FI814187A7/en
Priority to PCT/SE1981/000134 priority patent/WO1981003184A1/en
Publication of SE8003349L publication Critical patent/SE8003349L/en
Priority to DK182A priority patent/DK182A/en

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
    • 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
    • C21D1/763—Adjusting the composition of the atmosphere using a catalyst

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

In an indirectly heated, gas-fired furnace (10) for the heat treatment of metal material in an atmosphere of processing gas consisting predominantly of nitrogen, the processing gas is produced using the heating exhaust gases as the principal raw material. The exhaust gases are cooled, filtered and freed of carbon monoxide and water vapour, whereupon a small amount of air is added to impart a predetermined value to the oxygen content and a controlled amount of liquefied petroleum gas or other hydrocarbon gas is added. A processing gas consisting predominantly of nitrogen, hydrogen and carbon monoxide is produced by thermal cracking of the liquefied petroleum gas in a catalytic reactor (25) and fed to the furnace (10). If a processing gas free of carbon and consisting predominantly of nitrogen and hydrogen is required, the reactor (25) may be replaced by a deoxo reactor into which the exhaust gases, after their oxygen content has been adjusted, are fed together with a controlled amount of hydrogen gas.
SE8003349A 1980-05-05 1980-05-05 SET FOR HEATING, HEALING OR HEATING OF METALLIC GOODS SE8003349L (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SE8003349A SE8003349L (en) 1980-05-05 1980-05-05 SET FOR HEATING, HEALING OR HEATING OF METALLIC GOODS
BR8108584A BR8108584A (en) 1980-05-05 1981-05-05 PROCESS OF HEATING, MAINTENANCE OR THERMAL TREATMENT OF METALLIC MATERIAL
EP81901121A EP0052113A1 (en) 1980-05-05 1981-05-05 Method of heating, hilding or heat treatment of metal material
FI814187A FI814187A7 (en) 1980-05-05 1981-05-05 A method used in heating, holding, or heat treating a metallic substance.
PCT/SE1981/000134 WO1981003184A1 (en) 1980-05-05 1981-05-05 Method of heating,holding or heat treatment of metal material
DK182A DK182A (en) 1980-05-05 1982-01-04 METHOD OF HEATING HEATING OR HEATING OF METALLIC MATERIAL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8003349A SE8003349L (en) 1980-05-05 1980-05-05 SET FOR HEATING, HEALING OR HEATING OF METALLIC GOODS

Publications (1)

Publication Number Publication Date
SE8003349L true SE8003349L (en) 1981-11-06

Family

ID=20340897

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8003349A SE8003349L (en) 1980-05-05 1980-05-05 SET FOR HEATING, HEALING OR HEATING OF METALLIC GOODS

Country Status (6)

Country Link
EP (1) EP0052113A1 (en)
BR (1) BR8108584A (en)
DK (1) DK182A (en)
FI (1) FI814187A7 (en)
SE (1) SE8003349L (en)
WO (1) WO1981003184A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3440876A1 (en) * 1984-11-08 1986-05-15 Linde Ag, 6200 Wiesbaden METHOD AND DEVICE FOR PRODUCING A PROTECTIVE GAS ATMOSPHERE

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE890513C (en) * 1938-08-30 1953-09-21 Benno Schilde Maschb A G Process and furnace for the heat treatment of high-speed steels under protective gas
DE901655C (en) * 1939-08-08 1954-01-14 Siemens Ag Method and device for generating a furnace protective gas with a high content of carburizing constituents
DE1433735B1 (en) * 1963-09-21 1969-09-04 Werner Goehring Process for achieving a furnace atmosphere with which an oxidation-free heat treatment of workpieces made of steel can be carried out while at the same time influencing the carbon content

Also Published As

Publication number Publication date
DK182A (en) 1982-01-04
EP0052113A1 (en) 1982-05-26
FI814187L (en) 1981-12-29
WO1981003184A1 (en) 1981-11-12
FI814187A7 (en) 1981-12-29
BR8108584A (en) 1982-04-06

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