EP 0495151 B1 19940622 - Method of heat treating in vacuum furnaces.
Title (en)
Method of heat treating in vacuum furnaces.
Title (de)
Verfahren zur Wärmebehandlung in Vakuumöfen.
Title (fr)
Procédé pour le traitement thermique dans un four à vide.
Publication
Application
Priority
DE 4100989 A 19910115
Abstract (en)
[origin: EP0495151A1] 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.
IPC 1-7
IPC 8 full level
C21D 1/773 (2006.01)
CPC (source: EP)
C21D 1/773 (2013.01)
Citation (examination)
Designated contracting state (EPC)
AT DE FR GB
DOCDB simple family (publication)
EP 0495151 A1 19920722; EP 0495151 B1 19940622; AT E107707 T1 19940715; DE 4100989 A1 19920716; DE 59102016 D1 19940728
DOCDB simple family (application)
EP 91105103 A 19910328; AT 91105103 T 19910328; DE 4100989 A 19910115; DE 59102016 T 19910328