EP 0695813 A3 19970212 - Process for carburizing carburisable work pieces under the action of plasma-pulses
Title (en)
Process for carburizing carburisable work pieces under the action of plasma-pulses
Title (de)
Verfahren zum Aufkohlen von Bauteilen aus kohlungsfähigen Werkstoffen mittels einer impulsförmig betriebenen Plasma-entladung
Title (fr)
Procédé pour la carburation de pièces carburables par des impulsions à plasma
Publication
Application
Priority
DE 4427902 A 19940806
Abstract (en)
[origin: US5558725A] Workpieces of carburizable materials, especially steels, are carburized by means of a pulsed plasma discharge in a carbon-containing atmosphere at pressures of 0.1-30 mbars and at pulsed voltages of 200-2,000 V, preferably of 300-1,000 V. A continuously applied baseline voltage, which is below the breakdown voltage, is superimposed on the pulsed voltage. The baseline voltage is preferably a direct-current voltage, which is in the range of 10-150 V, preferably of 20-100 V.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
C23C 8/38 (2013.01 - EP US)
Citation (search report)
- [X] US 2946708 A 19600726 - BERNHARD BERGHAUS, et al
- [XP] FR 2708624 A1 19950210 - NEUVILLE STEPHANE [FR]
- [X] US 4406765 A 19830927 - HIGASHI AKIO [JP], et al
- [A] DE 2842407 A1 19800403 - STAUDER NORBERT
- [A] DE 4003623 A1 19910808 - KLOECKNER IONON [DE]
- [AD] DE 4238993 C1 19930701
- [X] PATENT ABSTRACTS OF JAPAN vol. 14, no. 342 (C - 0743) 24 July 1990 (1990-07-24)
Designated contracting state (EPC)
AT CH DE FR GB IT LI SE
DOCDB simple family (publication)
US 5558725 A 19960924; AT E184329 T1 19990915; DE 4427902 C1 19950330; DE 59506771 D1 19991014; EP 0695813 A2 19960207; EP 0695813 A3 19970212; EP 0695813 B1 19990908; JP H08170162 A 19960702
DOCDB simple family (application)
US 49821695 A 19950705; AT 95109082 T 19950613; DE 4427902 A 19940806; DE 59506771 T 19950613; EP 95109082 A 19950613; JP 19884395 A 19950803