Title (en)

Method of carburizing metallic workpieces in a vacuum furnace

Title (de)

Verfahren zur Aufkohlung metallischer Werkstücke in einem Vakuum-Ofen

Title (fr)

Procédé de cémentation de pièces métalliques dans un four sous vide

Publication

EP 0882811 B2 20101215 (DE)

Application

EP 97108860 A 19970603

Priority

EP 97108860 A 19970603

Abstract (en)

[origin: EP0882811A1] The method concerns carburisation of metal workpieces in a vacuum furnace, according to which the furnace atmosphere contains a carbon carrier which under the process conditions is split for delivery of pure carbon. The carbon carrier used is a hydrocarbon with a carbon to hydrogen ratio of 1:1, preferably acetylene.

IPC 8 full level

C23C 8/22 (2006.01); C23C 8/38 (2006.01)

CPC (source: EP)

C23C 8/22 (2013.01); C23C 8/38 (2013.01)

Citation (opposition)

Opponent :

• DE 2216688 A1 19730111 - HAYES INC C I
• EP 0818555 A1 19980114 - JH CORP [JP]

Designated contracting state (EPC)

AT BE CH DE ES FR GB IT LI NL SE

DOCDB simple family (publication)

EP 0882811 A1 19981209; EP 0882811 B1 20010725; EP 0882811 B2 20101215; AT E203572 T1 20010815; DE 59704123 D1 20010830; ES 2161398 T3 20011201; ES 2161398 T5 20110405

DOCDB simple family (application)

EP 97108860 A 19970603; AT 97108860 T 19970603; DE 59704123 T 19970603; ES 97108860 T 19970603