EP 2773788 B1 20190220 - METHOD FOR LOW-PRESSURE CARBONITRIDING HAVING AN EXTENDED TEMPERATURE RANGE IN AN INITIAL NITRIDATION PHASE
Title (en)
METHOD FOR LOW-PRESSURE CARBONITRIDING HAVING AN EXTENDED TEMPERATURE RANGE IN AN INITIAL NITRIDATION PHASE
Title (de)
VERFAHREN FÜR NIEDERDRUCK-CARBONITRIERUNG MIT ERWEITERTEM TEMPERATURBEREICH IN DER ERSTEN NITRIERUNGSPHASE
Title (fr)
PROCEDE DE CARBONITRURATION BASSE PRESSION, A PLAGE DE TEMPERATURE ETENDUE DANS UNE PHASE DE NITRURATION INITIALE
Publication
Application
Priority
- FR 1159875 A 20111031
- EP 2012069888 W 20121008
Abstract (en)
[origin: WO2013064335A1] The invention relates to a method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles, comprising: a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700°C and 750° C to a temperature between 860° C and 1000° C and is carried out using a reduced temperature gradient relative to the simple heating phase; and alternate cementing (C1-Cn) and nitridation (N1- Nn) steps at constant temperature; wherein the final nitridation step is accompanied with a decrease in temperature immediately before a quenching step (T).
IPC 8 full level
C23C 8/02 (2006.01); C23C 8/32 (2006.01); C23C 8/34 (2006.01); C23C 8/80 (2006.01)
CPC (source: EP US)
C23C 8/02 (2013.01 - EP US); C23C 8/32 (2013.01 - EP US); C23C 8/34 (2013.01 - EP US); C23C 8/80 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
FR 2981947 A1 20130503; FR 2981947 B1 20140103; BR 112014010314 A2 20170502; CN 103946411 A 20140723; CN 103946411 B 20160120; EP 2773788 A1 20140910; EP 2773788 B1 20190220; JP 2014532808 A 20141208; JP 6189849 B2 20170830; KR 101945006 B1 20190201; KR 20140101751 A 20140820; MX 2014005219 A 20150309; MX 359961 B 20181017; US 2014238549 A1 20140828; US 2017241008 A9 20170824; US 9765422 B2 20170919; WO 2013064335 A1 20130510
DOCDB simple family (application)
FR 1159875 A 20111031; BR 112014010314 A 20121008; CN 201280053989 A 20121008; EP 12772301 A 20121008; EP 2012069888 W 20121008; JP 2014539273 A 20121008; KR 20147015029 A 20121008; MX 2014005219 A 20121008; US 201214354418 A 20121008