ATE89868T1 - METHOD AND DEVICE FOR THE HEAT TREATMENT OF METALLIC WORKPIECES. - Google Patents

METHOD AND DEVICE FOR THE HEAT TREATMENT OF METALLIC WORKPIECES.

Info

Publication number
ATE89868T1
ATE89868T1 AT87112804T AT87112804T ATE89868T1 AT E89868 T1 ATE89868 T1 AT E89868T1 AT 87112804 T AT87112804 T AT 87112804T AT 87112804 T AT87112804 T AT 87112804T AT E89868 T1 ATE89868 T1 AT E89868T1
Authority
AT
Austria
Prior art keywords
gas
furnace
continuous furnace
heating zone
nitrogen
Prior art date
Application number
AT87112804T
Other languages
German (de)
Inventor
Reinhard Dipl-Ing Strigl
Original Assignee
Linde Ag
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 Linde Ag filed Critical Linde Ag
Application granted granted Critical
Publication of ATE89868T1 publication Critical patent/ATE89868T1/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
    • 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

Abstract

The workpieces are heat-treated in a gas-heated continuous furnace under the action of a gas atmosphere which consists essentially of nitrogen, hydrogen and carbon monoxide. This process is made more economical by means of saving gas, if the gas atmosphere formed by a treatment gas containing nitrogen, hydrogen and carbon monoxide is fed to the continuous furnace in the region of its heating zone and the gas is generated, directly before it enters the continuous furnace, by catalytic reaction of a gas containing hydrocarbons and air, and nitrogen is fed to the continuous furnace on either side of the treatment gas feed point, between the furnace inlet and the heating zone and between the heating zone and the furnace outlet.
AT87112804T 1986-09-10 1987-09-02 METHOD AND DEVICE FOR THE HEAT TREATMENT OF METALLIC WORKPIECES. ATE89868T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863630833 DE3630833A1 (en) 1986-09-10 1986-09-10 METHOD AND DEVICE FOR HEAT TREATING METAL WORKPIECES
EP87112804A EP0261461B1 (en) 1986-09-10 1987-09-02 Method and apparatus for heat treating metal work pieces

Publications (1)

Publication Number Publication Date
ATE89868T1 true ATE89868T1 (en) 1993-06-15

Family

ID=6309316

Family Applications (1)

Application Number Title Priority Date Filing Date
AT87112804T ATE89868T1 (en) 1986-09-10 1987-09-02 METHOD AND DEVICE FOR THE HEAT TREATMENT OF METALLIC WORKPIECES.

Country Status (5)

Country Link
EP (1) EP0261461B1 (en)
AT (1) ATE89868T1 (en)
BR (1) BR8704618A (en)
DE (2) DE3630833A1 (en)
ES (1) ES2042524T3 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3842372C2 (en) * 1988-12-16 1996-10-02 Induktionserwaermung Fritz Due Device for the heat treatment of metallic workpieces
DE3942810A1 (en) * 1989-12-23 1991-06-27 Linde Ag METHOD FOR PROVIDING AND DISTRIBUTING TREATMENT GAS IN HEAT TREATMENTS
DE4016183A1 (en) * 1990-05-19 1991-11-21 Linde Ag METHOD FOR IMPROVING THE PROVISION OF TREATMENT GAS IN HEAT TREATMENTS
FR2668584B1 (en) * 1990-10-26 1994-03-18 Lair Liquide PROCESS FOR DEVELOPING A HEAT TREATMENT ATMOSPHERE AND HEAT TREATMENT PLANT.
DE4343927C1 (en) * 1993-12-22 1995-01-05 Linde Ag Method for thermal treatment of workpieces under treatment gas
DE19545764C2 (en) * 1995-12-07 2000-02-17 Linde Ag Process for producing protective gas for a heat treatment furnace and heat treatment plant
IT1291479B1 (en) * 1997-01-29 1999-01-11 Rivoira Spa PROCESS OF HEAT TREATMENT OF METALLIC PIECES WITH A FERROUS BASE IN AN ACTIVE ATMOSPHERE WITH A HIGH CARBON POTENTIAL.
DE10347312B3 (en) * 2003-10-08 2005-04-14 Air Liquide Deutschland Gmbh Process for the heat treatment of iron materials

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD31283A (en) *
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
DD131292A1 (en) * 1977-03-28 1978-06-14 Arnd Mueller DEVICE FOR PROTECTING GAS GENERATION IN THE OVEN ROOM
DE3440876A1 (en) * 1984-11-08 1986-05-15 Linde Ag, 6200 Wiesbaden METHOD AND DEVICE FOR PRODUCING A PROTECTIVE GAS ATMOSPHERE

Also Published As

Publication number Publication date
BR8704618A (en) 1988-04-26
DE3630833A1 (en) 1988-03-17
EP0261461A3 (en) 1989-03-15
EP0261461B1 (en) 1993-05-26
DE3785989D1 (en) 1993-07-01
EP0261461A2 (en) 1988-03-30
ES2042524T3 (en) 1993-12-16

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Legal Events

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