EP0261461A3 - Method and apparatus for heat treating metal work pieces - Google Patents

Method and apparatus for heat treating metal work pieces Download PDF

Info

Publication number
EP0261461A3
EP0261461A3 EP87112804A EP87112804A EP0261461A3 EP 0261461 A3 EP0261461 A3 EP 0261461A3 EP 87112804 A EP87112804 A EP 87112804A EP 87112804 A EP87112804 A EP 87112804A EP 0261461 A3 EP0261461 A3 EP 0261461A3
Authority
EP
European Patent Office
Prior art keywords
gas
furnace
continuous furnace
heating zone
nitrogen
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
EP87112804A
Other languages
German (de)
Other versions
EP0261461B1 (en
EP0261461A2 (en
Inventor
Reinhard Dipl.-Ing. Strigl
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 GmbH filed Critical Linde GmbH
Priority to AT87112804T priority Critical patent/ATE89868T1/en
Publication of EP0261461A2 publication Critical patent/EP0261461A2/en
Publication of EP0261461A3 publication Critical patent/EP0261461A3/en
Application granted granted Critical
Publication of EP0261461B1 publication Critical patent/EP0261461B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Furnace Details (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Processing Of Solid Wastes (AREA)
  • Tunnel Furnaces (AREA)

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.
EP87112804A 1986-09-10 1987-09-02 Method and apparatus for heat treating metal work pieces Expired - Lifetime EP0261461B1 (en)

Priority Applications (1)

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

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
DE3630833 1986-09-10

Publications (3)

Publication Number Publication Date
EP0261461A2 EP0261461A2 (en) 1988-03-30
EP0261461A3 true EP0261461A3 (en) 1989-03-15
EP0261461B1 EP0261461B1 (en) 1993-05-26

Family

ID=6309316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112804A Expired - Lifetime EP0261461B1 (en) 1986-09-10 1987-09-02 Method and apparatus for heat treating metal work pieces

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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD31283A (en) *
AT258994B (en) * 1963-09-21 1967-12-27 Werner Goehring Method for generating a furnace atmosphere for the heat treatment of metals, in particular steel
DE2758024A1 (en) * 1977-03-28 1978-10-12 Thaelmann Schwermaschbau Veb Shielding gas generator for heat treatment furnaces - is cracker with tubular housing with catalyst held in furnace chamber
EP0180953A2 (en) * 1984-11-08 1986-05-14 Linde Aktiengesellschaft Method and device for producing a protective atmosphere

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD31283A (en) *
AT258994B (en) * 1963-09-21 1967-12-27 Werner Goehring Method for generating a furnace atmosphere for the heat treatment of metals, in particular steel
DE2758024A1 (en) * 1977-03-28 1978-10-12 Thaelmann Schwermaschbau Veb Shielding gas generator for heat treatment furnaces - is cracker with tubular housing with catalyst held in furnace chamber
EP0180953A2 (en) * 1984-11-08 1986-05-14 Linde Aktiengesellschaft Method and device for producing a protective atmosphere

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HTM HAERTEREI-TECHNISCHE MITTEILUNGEN, Band 41, Nr. 2, Maerz/April 1986, Seiten 107-108, München; G. Boehm: 'Bessere Wirtschaftlichkeit beim Blankglühen durch Cryogen-Schnellk}hlung' *

Also Published As

Publication number Publication date
BR8704618A (en) 1988-04-26
DE3630833A1 (en) 1988-03-17
DE3785989D1 (en) 1993-07-01
ATE89868T1 (en) 1993-06-15
EP0261461B1 (en) 1993-05-26
ES2042524T3 (en) 1993-12-16
EP0261461A2 (en) 1988-03-30

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