EP 0947600 A3 20030312 - Process for vacuum carburizing in a treatment furnace
Title (en)
Process for vacuum carburizing in a treatment furnace
Title (de)
Verfahren zur Vakuumaufkohlung unter Behandlungsgas
Title (fr)
Procédé de cémentation sous vide sous un gaz de traitement
Publication
Application
Priority
DE 19815233 A 19980404
Abstract (en)
[origin: EP0947600A2] Steel is gas carburized using propane mixed with at least an equal quantity of hydrogen, while pumping away the propane decomposition products. Vacuum carburizing of steel is carried out at up to 20 mbar pressure and at 250 degrees C using propane mixed with hydrogen in the ratio 1:1-2, the propane decomposition products being withdrawn by a pump connected to the treatment chamber.
IPC 1-7
IPC 8 full level
CPC (source: EP)
C23C 8/22 (2013.01)
Citation (search report)
- [A] DE 4343927 C1 19950105 - LINDE AG [DE]
- [A] DE 4110361 A1 19921001 - LINDE AG [DE]
- [A] US 4807853 A 19890228 - MURAKAMI KOJI [JP], et al
- [A] US 4386973 A 19830607 - KAWKA RICHARD J, et al
- [A] EP 0818555 A1 19980114 - JH CORP [JP]
- [A] GB 1510481 A 19780510 - BRITISH STEEL CORP
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)
EP 0947600 A2 19991006; EP 0947600 A3 20030312; DE 19815233 A1 19991007; JP H11315362 A 19991116
DOCDB simple family (application)
EP 99100982 A 19990121; DE 19815233 A 19980404; JP 9495599 A 19990401