EP 0535319 B1 19950614 - Vacuum furnace for plasma carburization of metallic workpieces.
Title (en)
Vacuum furnace for plasma carburization of metallic workpieces.
Title (de)
Vakuumofen zur Plasmaaufkohlung metallischer Werkstücke.
Title (fr)
Four sous vide pour la carburisation de pièces métalliques par plasma.
Publication
Application
Priority
DE 4132712 A 19911001
Abstract (en)
[origin: EP0535319A1] A vacuum furnace for plasma carburisation of metallic workpieces in an artificially generated electric field by means of a carbon-containing gas comprises an electric heating device (11), a vacuum pump (24) for producing a vacuum in the heating chamber (6) and gas inlet orifices (9) by means of which a cooling gas delivered by a fan (22) and passed through a heat exchanger (21) is fed to the charge (7). To obtain a vacuum furnace of smaller constructional size than that of known vacuum furnaces, the furnace casing (1) in the form of a pressure vessel is designed with respect to its permissible pressure loading for a pressure of at least 10 bar, as is the drive (4) of the fan (22) with respect to the gas pressure which can be reached on cooling of the charge (7). In addition, the gas inlet orifices (9) bearing the cooling gas are located in the heating chamber (6) and point to the charge (7). <IMAGE>
IPC 1-7
IPC 8 full level
C21D 1/673 (2006.01); C23C 8/36 (2006.01); C23C 8/38 (2006.01)
CPC (source: EP)
C23C 8/38 (2013.01)
Designated contracting state (EPC)
AT CH DE ES FR GB IT LI SE
DOCDB simple family (publication)
EP 0535319 A1 19930407; EP 0535319 B1 19950614; AT E123820 T1 19950615; DE 4132712 A1 19930408; DE 4132712 C2 19950629; DE 59202520 D1 19950720; ES 2074773 T3 19950916
DOCDB simple family (application)
EP 92112630 A 19920723; AT 92112630 T 19920723; DE 4132712 A 19911001; DE 59202520 T 19920723; ES 92112630 T 19920723