EP 1230415 A1 20020814 - METHOD FOR NITRO-CARBURIZATION OF METAL WORKPIECES
Title (en)
METHOD FOR NITRO-CARBURIZATION OF METAL WORKPIECES
Title (de)
VERFAHREN FÜR DIE NITROCARBURIERUNG METALLISCHER WERKSTÜCKE
Title (fr)
PROCEDE POUR LA NITRO-CARBURATION DE PIECES METALLIQUES
Publication
Application
Priority
- DE 19940370 A 19990825
- EP 0007576 W 20000804
Abstract (en)
[origin: WO0114611A1] The invention relates to a known method for nitro-carburization of metal workpieces, whereby the workpieces are treated in a treatment chamber with a treatment atmosphere containing nitrogen, carbon monoxide and hydrogen at treatment temperature, whereby carbon dioxide is used as carbon contributor to generate the treatment atmosphere. The invention aims at modifying said method so as to be able to regulate as much as possible the type and volume of nitride formation. To this end, a gas flow (1; 21) containing carbon dioxide is introduced into a reactor (4; 24) connected upstream from the treatment chamber (6; 27) and modified therein into a carburizing gas (5; 25) by reaction with a hydrogen contributor (2; 22) at a reaction temperature above treatment temperature, said gas having a higher carbon activity at treatment temperature than the gas flow (1; 21) containing carbon dioxide.
IPC 1-7
IPC 8 full level
CPC (source: EP)
C23C 8/30 (2013.01)
Citation (search report)
See references of WO 0114611A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0114611 A1 20010301; AT E257865 T1 20040115; CZ 2002645 A3 20030212; CZ 298996 B6 20080402; DE 19940370 A1 20010301; DE 19940370 C2 20010712; DE 50005043 D1 20040219; EP 1230415 A1 20020814; EP 1230415 B1 20040114; ES 2214316 T3 20040916; PL 195105 B1 20070831; PL 353217 A1 20031103
DOCDB simple family (application)
EP 0007576 W 20000804; AT 00962293 T 20000804; CZ 2002645 A 20000804; DE 19940370 A 19990825; DE 50005043 T 20000804; EP 00962293 A 20000804; ES 00962293 T 20000804; PL 35321700 A 20000804