EP 2135961 A2 20091223 - Method and device for heat treating metallic materials in a protective atmosphere
Title (en)
Method and device for heat treating metallic materials in a protective atmosphere
Title (de)
Verfahren und Einrichtung zur Wärmebehandlung von metallischen Werkstoffen unter Schutzgasatmosphäre
Title (fr)
Procédé et dispositif destinés au traitement à chaud de matières métalliques sous atmosphère protectrice
Publication
Application
Previously filed application
102008029001 20080620 DE
Priority
DE 102008029001 A 20080620
Abstract (en)
In a method for heat treating metals by carburization in an industrial furnace (1) with a heated enclosure and a quenching chamber (8) using inert gas (I), (I) is recycled after reacting the components of (I) (including carbon dioxide, oxygen and water vapor) with added hydrocarbon in a catalyst bed-containing processing region (3) of the heating chamber, to give carbon monoxide and hydrogen and provide (I) having a regulated carbon potential. An independent claim is included for apparatus for carrying out the metal heat treatment process, comprising the industrial furnace (1) having a heated enclosure, including a treatment chamber (2) and a catalyst bed-containing processing chamber (3), and a quenching chamber (8), plus (as novel features) (a) a gas analyzing carbon potential regulator (5) corresponding to the processing chamber, (b) a circulator (4) for inert gas (I) for recycling, plus regulated supplies of air and reaction gas, (c) a gas-tight valve (6.1) to a burning off site (6) with a pressure regulator (6.2) and a gassing function in the case of pressure reduction (components (a) - (c) being functionally integrated in a regulation circuit (R)) and (d) an inner door (7) for sealing the heated enclosure from the quenching chamber in sealed manner.
Abstract (de)
Die Erfindung umfaßt ein Schutzgasrezirkulationssystem mit Verfahren und Einrichtung für die Gasaufkohlung von Werkstoffen in einem Industrieofen (1), in dem die Komponenten Kohlenstoffdioxid, Sauerstoff und Wasserdampf mit zugeführtem Reaktionsgas zu Kohlenstoffmonoxid und Wasserstoff katalytisch reagieren, um bereits "verbrauchtes" Schutzgas als in einem Aufbereitungsraum (3) "aufbereitetes" Schutzgas dann wieder an einer oder mehreren Stellen (2.2) in einen Behandlungsraum (2.1) einzuspeisen, so dass sich ein realer Kreisprozess einstellt und die Gasaufkohlung kontinuierlich unter Einsparung an Schutzgas ablaufen kann (Fig.).
IPC 8 full level
C21D 1/76 (2006.01); C21D 1/773 (2006.01); C21D 11/00 (2006.01); C23C 8/20 (2006.01)
CPC (source: EP US)
C21D 1/763 (2013.01 - EP US); C21D 1/773 (2013.01 - EP US); C21D 11/00 (2013.01 - EP US); C23C 8/20 (2013.01 - EP US)
Citation (applicant)
- DE 3632577 A1 19880505 - LINDE AG [DE]
- DE 3888814 T2 19941027 - HI TECH CERAMICS INC [US]
- DE 4005710 C1 19900823
- DE 4416469 C1 19950907 - KOPPE JUERGEN DR [DE]
- DE 69133356 T2 20041209 - DOWA MINING CO [JP], et al
- DE 69013997 T2 19950524 - KANTO YAKIN KOGYO [JP]
- DE 69401425 T2 19970605 - SERTHEL [FR]
- DE 29908528 U1 19990812 - LINDE AG [DE]
- GB 1069531 A 19670517 - LEEDS & NORTHRUP CO
- US 3620518 A 19711116 - WINTER KARL-HEINZ, et al
- US 4294436 A 19811013 - TAKAHASHI SUSUMU
- US 5645808 A 19970708 - KRAUSE KARL ROBERT [US]
- US 2006081567 A1 20060420 - DOUGHERTY MICHAEL L SR [US], et al
- JP S62199761 A 19870903 - ISHIKAWAJIMA HARIMA HEAVY IND, et al
- FR 2181597 A1 19731207 - STEIN SURFACE [FR]
- DE 4427507 C1 19950601 - LINDE AG [DE]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
DE 102008029001 B3 20090917; CN 101608294 A 20091223; CN 101608294 B 20131023; EP 2135961 A2 20091223; EP 2135961 A3 20130213; EP 2135961 B1 20141001; JP 2010001567 A 20100107; PL 2135961 T3 20150331; RU 2009123209 A 20101227; US 2009314388 A1 20091224; US 8313586 B2 20121120
DOCDB simple family (application)
DE 102008029001 A 20080620; CN 200910146224 A 20090622; EP 09007348 A 20090603; JP 2009139871 A 20090611; PL 09007348 T 20090603; RU 2009123209 A 20090618; US 48734009 A 20090618