Global Patent Index - EP 3230487 A1

EP 3230487 A1 2017-10-18 - LOW PRESSURE CARBONITRIDING METHOD AND FURNACE

Title (en)

LOW PRESSURE CARBONITRIDING METHOD AND FURNACE

Title (de)

NIEDERDRUCK-CARBONITRIERUNGSVERFAHREN UND OFEN

Title (fr)

PROCEDE ET FOUR DE CARBONITRURATION A BASSE PRESSION

Publication

EP 3230487 A1 (FR)

Application

EP 15817994 A

Priority

  • FR 1462260 A
  • FR 2015053419 W

Abstract (en)

[origin: WO2016092219A1] The invention relates to a method for carbonitriding of a steel part arranged in a chamber, comprising first steps and second steps, a carburizing gas being injected into the chamber during the first steps only and a nitriding gas being injected into the chamber during the second steps only, at least one of the second steps being situated between two first steps, the pressure in the chamber during at least one part of said two first steps being maintained at a first value and the pressure in the chamber during at least one part of said second step situated between said two first steps being at a second value that is strictly greater than the first value.

IPC 8 full level (invention and additional information)

C23C 8/32 (2006.01); C21D 1/06 (2006.01); C21D 1/76 (2006.01); C23C 8/34 (2006.01)

CPC (invention and additional information)

C23C 8/34 (2013.01); C21D 1/06 (2013.01); C21D 1/76 (2013.01)

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

Designated extension state (EPC)

BA ME

EPO simple patent family

WO 2016092219 A1 20160616; CA 2970247 A1 20160616; CN 107406960 A 20171128; EP 3230487 A1 20171018; FR 3029938 A1 20160617; JP 2018505301 A 20180222; KR 20170093855 A 20170816; MX 2017007484 A 20171002; US 2017356077 A1 20171214

INPADOC legal status


2018-04-25 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20180322

2018-03-21 [DAV] REQUEST FOR VALIDATION OF THE EUROPEAN PATENT (IN ANY COUNTRY) (DELETED)

2018-03-21 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) (DELETED)

2017-10-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20170529

2017-10-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): 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

2017-10-18 [AV] REQUEST FOR VALIDATION OF THE EUROPEAN PATENT IN:

- Countries: MA MD

2017-10-18 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: BA ME