ATE107707T1 - PROCESSES FOR HEAT TREATMENT IN VACUUM FURNACES. - Google Patents

PROCESSES FOR HEAT TREATMENT IN VACUUM FURNACES.

Info

Publication number
ATE107707T1
ATE107707T1 AT91105103T AT91105103T ATE107707T1 AT E107707 T1 ATE107707 T1 AT E107707T1 AT 91105103 T AT91105103 T AT 91105103T AT 91105103 T AT91105103 T AT 91105103T AT E107707 T1 ATE107707 T1 AT E107707T1
Authority
AT
Austria
Prior art keywords
heat treatment
hydrogen
processes
workpieces
vacuum furnace
Prior art date
Application number
AT91105103T
Other languages
German (de)
Inventor
Alexander Dipl-Ing Jurmann
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 ATE107707T1 publication Critical patent/ATE107707T1/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
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Tunnel Furnaces (AREA)

Abstract

The invention relates to the heat treatment of workpieces in a vacuum furnace, using hydrogen. For convective heating and for high-pressure gas-quenching of the workpieces, usually nitrogen and helium are used. To achieve shorter heating and/or cooling times, the use of hydrogen is desirable, but this raises safety engineering problems. The risks are here considerably reduced if, according to the invention, a space which surrounds at least a part of the vacuum furnace and is insulated gas-tight is flushed with an inert gas and continuously checked for its hydrogen content and oxygen content.
AT91105103T 1991-01-15 1991-03-28 PROCESSES FOR HEAT TREATMENT IN VACUUM FURNACES. ATE107707T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4100989A DE4100989A1 (en) 1991-01-15 1991-01-15 PROCESS FOR HEAT TREATMENT IN VACUUM OVENS

Publications (1)

Publication Number Publication Date
ATE107707T1 true ATE107707T1 (en) 1994-07-15

Family

ID=6423052

Family Applications (1)

Application Number Title Priority Date Filing Date
AT91105103T ATE107707T1 (en) 1991-01-15 1991-03-28 PROCESSES FOR HEAT TREATMENT IN VACUUM FURNACES.

Country Status (3)

Country Link
EP (1) EP0495151B1 (en)
AT (1) ATE107707T1 (en)
DE (2) DE4100989A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19709957A1 (en) * 1997-03-11 1998-09-17 Linde Ag Process for gas quenching of metallic workpieces after heat treatments
DE10108057A1 (en) * 2001-02-20 2002-08-22 Linde Ag Process for quenching metallic workpieces
FR2863628B1 (en) * 2003-12-11 2006-11-17 Etudes Const Mecaniques DEVICE FOR TEMPERING STEEL PARTS
DE102005045783A1 (en) * 2005-09-23 2007-03-29 Sistem Teknik Endustriyel Elektronik Sistemler Sanayi Ve Ticaret Ltd. Sirketi Single-chamber vacuum furnace with hydrogen quenching

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE52162C (en) * Dr. A. BUECHER in Heidelberg Method and means for eradicating rust on objects made of iron and steel
AT99423B (en) * 1923-02-17 1925-03-10 Huettenmaennische Verfahren M Closed furnace with gas-tight jacket for vacuum operation.
AT395321B (en) * 1983-07-05 1992-11-25 Ebner Ind Ofenbau METHOD FOR COOLING CHARGES IN DISCONTINUOUSLY WORKING INDUSTRIAL OVENS, ESPECIALLY STEEL WIRE OR TAPE BANDS IN DOME GLUES
DE3736501C1 (en) * 1987-10-28 1988-06-09 Degussa Process for the heat treatment of metallic workpieces

Also Published As

Publication number Publication date
EP0495151B1 (en) 1994-06-22
EP0495151A1 (en) 1992-07-22
DE59102016D1 (en) 1994-07-28
DE4100989A1 (en) 1992-07-16

Similar Documents

Publication Publication Date Title
DE3864007D1 (en) METHOD FOR HEAT TREATING METAL WORKPIECES.
ES2100254T3 (en) IN SITU PRODUCTION OF ATMOSPHERES FOR THERMAL TREATMENT THROUGH THE USE OF NON-CRYOGENICALLY PRODUCED NITROGEN.
ES520824A0 (en) SURFACE HARDENING PROCEDURE FOR METAL PIECES.
ES552641A0 (en) PROCEDURE FOR THE THERMAL TREATMENT OF STEEL WIRES IN FLUIDIFIED BEDS AND APPARATUS FOR THE IMPLEMENTATION OF THE SAME
ATE107707T1 (en) PROCESSES FOR HEAT TREATMENT IN VACUUM FURNACES.
SE8203563L (en) BLESTERTEMPERATURHOJNING
BR9102643A (en) PROCESS FOR TREATING A METAL PIECE WITH LASER RAY
PL338955A1 (en) Method of and apparatus for performing heat treatment of workpieces
SE9400807D0 (en) Treatment of steel
AR013587A1 (en) METHOD FOR PRODUCING STEEL IN AN ELECTRIC OVEN LOADED WITH FIXED ARRABIO.
Pishvanov et al. Annealing of Ball Bearing Steel in Continuous Furnaces Using a Nitrogen-Hydrogen Protective Gas
SU1315487A1 (en) Method for cyclic heat treatment of medium-carbon and low-alloy steels
Holm Synthetic heat-treating atmospheres
Renowden et al. Unique Atmosphere Control System for Carbon Control
ATE317918T1 (en) METHOD FOR QUENCHING METAL WORKPIECES
Holm et al. Atmosphere for high quality tube annealing
Noll Heat Treatment of Steel Wires in Compact Coils
Luiten et al. Vacuum Heat Treatment Equipment in Practical Application
Wittler High-performance hydrogen annealing
Pierre Get High Uniformity, Repeatability With Vacuum Carburizing
Stanescu et al. Process for Annealing Ferrous Wire
Strigl New Style Gas Insertion. A Protective Gas Process for Carburization-Free Annealing of Steel
Astolfi Gas Techniques in the Heat Treatment of Metals
Virta et al. Gas Carburising and Neutral Hardening in the Fluidised Bed
GB969487A (en) Method and plant for the heat treatment of steel

Legal Events

Date Code Title Description
REN Ceased due to non-payment of the annual fee