EP 0512254 B2 20000119 - Process for uniform thermochemical treatment of steel pieces having difficult accessible areas
Title (en)
Process for uniform thermochemical treatment of steel pieces having difficult accessible areas
Title (de)
Verfahren zur gleichmässigen thermochemischen Behandlung von Bauteilen aus Stahl, die schwer zugängliche Flächen aufweisen
Title (fr)
Procédé pour le traitement thermochimique uniforme de pièces en acier ayant des surfaces d'accès difficle
Publication
Application
Priority
DE 4115135 A 19910508
Abstract (en)
[origin: CZ288263B6] Hollow bodies or holes in steel components are subjected to thermomechanical treatments above 450 deg.C with reactive gases, partic. ammonia with 5-95 vol.% N or a C-generating gas, pref. methane at 870-1000 deg.C, at gas pressures above 0.2 MPa. Pref. the treatment is carried out at constant pressure, between 0.2 MPa and 10 MPa, depending on furnace capability.
IPC 1-7
IPC 8 full level
C23C 8/20 (2006.01); C23C 8/22 (2006.01); C23C 8/26 (2006.01); F02M 61/16 (2006.01)
CPC (source: EP)
C23C 8/22 (2013.01); C23C 8/26 (2013.01); F02M 61/166 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0512254 A2 19921111; EP 0512254 A3 19930324; EP 0512254 B1 19960619; EP 0512254 B2 20000119; AT E139579 T1 19960715; CS 137592 A3 19921216; CZ 288263 B6 20010516; DE 4115135 C1 19920227; DE 59206595 D1 19960725; ES 2088515 T3 19960816; ES 2088515 T5 20000501; HU 209457 B 19940628; HU 913870 D0 19920228; HU T61056 A 19921130; JP 3258071 B2 20020218; JP H05132753 A 19930528; PL 291528 A1 19921116; RU 2052535 C1 19960120; TW 223128 B 19940501
DOCDB simple family (application)
EP 92105758 A 19920403; AT 92105758 T 19920403; CS 137592 A 19920506; DE 4115135 A 19910508; DE 59206595 T 19920403; ES 92105758 T 19920403; HU 387091 A 19911209; JP 11353092 A 19920506; PL 29152891 A 19910826; SU 5011449 A 19920507; TW 80106842 A 19910828