EP 0213991 B1 19890125 - PROCESS FOR RAPID CEMENTATION IN A CONTINUOUS FURNACE
Title (en)
PROCESS FOR RAPID CEMENTATION IN A CONTINUOUS FURNACE
Publication
Application
Priority
FR 8512380 A 19850814
Abstract (en)
[origin: ES8706850A1] Process in which there are injected a carrier gas and a hydrocarbon capable of producing, at conventional carburizing temperatures, an atmosphere of predetermined composition having a nominal concentration of carbon monoxide, a door of the furnace being opened with a given periodicity to permit the passage of a charge to be carburized, the opening of this door resulting in particular in an increase in the concentration of the oxidizing species in the atmosphere of the furnace. According to the invention, the concentration of carbon monoxide of the atmosphere injected into the furnace is increased with the same periodicity so as to compensate for the increase in the concentration of the oxidizing species of the furnace and thus maintain the carbon potential of the carburizing atmosphere of the furnace substantially constant throughout the duration of the carburization of the workpieces of the charge.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
C23C 8/22 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0213991 A1 19870311; EP 0213991 B1 19890125; AT E40416 T1 19890215; AU 587045 B2 19890803; AU 6022586 A 19870219; BR 8603865 A 19870324; CA 1259550 A 19890919; DE 3661943 D1 19890302; ES 556249 A0 19870701; ES 8706850 A1 19870701; FR 2586259 A1 19870220; FR 2586259 B1 19871030; JP S6240359 A 19870221; JP S6356304 B2 19881108; US 4769090 A 19880906; ZA 865392 B 19870325
DOCDB simple family (application)
EP 86401584 A 19860716; AT 86401584 T 19860716; AU 6022586 A 19860716; BR 8603865 A 19860813; CA 515899 A 19860813; DE 3661943 T 19860716; ES 556249 A 19860619; FR 8512380 A 19850814; JP 18973386 A 19860814; US 88392786 A 19860710; ZA 865392 A 19860718