EP 1432841 B1 20080123 - METHOD FOR HEAT-TREATING WORK PIECES MADE OF TEMPERATURE-RESISTANT STEELS
Title (en)
METHOD FOR HEAT-TREATING WORK PIECES MADE OF TEMPERATURE-RESISTANT STEELS
Title (de)
VERFAHREN ZUR WÄRMEBEHANDLUNG VON WERKSTÜCKEN AUS TEMPERATURBESTÄNDIGEN STÄHLEN
Title (fr)
PROCEDE DE TRAITEMENT THERMIQUE DE PIECES EN ACIERS RESISTANTS A LA TEMPERATURE
Publication
Application
Priority
- DE 0203582 W 20020924
- DE 10147205 A 20010925
Abstract (en)
[origin: WO03027349A2] The invention relates to a method for heat-treating work pieces made of a temperature-resistant steel. According to the inventive method, the work piece, once mechanically machined and electrochemically treated, is hardened and depassivated. The hardening comprises a reduction step so that before nitration no depassivation such as for example by pickling is required, thereby producing in the hardening step a surface condition that is favorable for the step-wise nitration.
IPC 8 full level
C23C 8/26 (2006.01); C21D 1/06 (2006.01); C21D 1/76 (2006.01); C21D 1/773 (2006.01); C21D 6/00 (2006.01); C23C 8/02 (2006.01)
CPC (source: EP US)
Designated contracting state (EPC)
FR GB IT
DOCDB simple family (publication)
WO 03027349 A2 20030403; WO 03027349 A3 20031204; BR 0206051 A 20030923; BR 0206051 B1 20110208; DE 10147205 C1 20030508; EP 1432841 A2 20040630; EP 1432841 B1 20080123; JP 2005503488 A 20050203; US 2004055670 A1 20040325; US 7108756 B2 20060919
DOCDB simple family (application)
DE 0203582 W 20020924; BR 0206051 A 20020924; DE 10147205 A 20010925; EP 02776699 A 20020924; JP 2003530909 A 20020924; US 43275103 A 20031022