EP 4045689 A1 20220824 - METHOD FOR TREATING A PART MADE OF FERROUS METAL, AND PART MADE OF FERROUS METAL
Title (en)
METHOD FOR TREATING A PART MADE OF FERROUS METAL, AND PART MADE OF FERROUS METAL
Title (de)
VERFAHREN ZUR BEHANDLUNG EINES TEILES AUS EISENMETALL UND TEIL AUS EISENMETALL
Title (fr)
PROCÉDÉ DE TRAITEMENT D'UNE PIÈCE EN MÉTAL FERREUX ET PIÈCE EN MÉTAL FERREUX
Publication
Application
Priority
- FR 1915524 A 20191224
- FR 2020052620 W 20201223
Abstract (en)
[origin: CA3160425A1] The invention relates principally to a method for treating a part (P) made of ferrous metal, comprising: a nitriding operation forming on the part (P) a combination layer (2) having a thickness of between 5 and 30 pm, and a diffusion region (3), arranged beneath and in contact with the combination layer (2), having a thickness of between 100 pm and 500 pm; then an operation of quenching the part (P) by high-frequency induction, over an induction depth that is greater than or equal to 0.5 mm, thereby hardening the part (P) and lending said part (P): ? a surface hardness greater than or equal to 50 HRC, ? a hardness of the combination layer (2) greater than or equal to 400 HV0.05, ? a hardness of the part of greater than or equal to 500 HV0.05 at a depth of 500 pm, and wherein the high-frequency induction quenching operation is carried out without the application of a protective film on the part (P) prior to the induction quenching operation. The invention also relates to a part (P) made of ferrous metal, having significant resistance to wear by abrasion and adhesion, improved friction properties and improved resistance to scaling, and good corrosion behavior.
IPC 8 full level
C21D 1/10 (2006.01); C21D 1/26 (2006.01); C21D 1/78 (2006.01); C22C 38/00 (2006.01); C22C 38/38 (2006.01); C23C 8/26 (2006.01); C23C 8/50 (2006.01); C23C 8/56 (2006.01); C23C 8/80 (2006.01)
CPC (source: EP KR US)
C21D 1/10 (2013.01 - EP KR); C21D 1/18 (2013.01 - KR); C21D 1/26 (2013.01 - EP KR); C21D 1/38 (2013.01 - KR); C21D 1/78 (2013.01 - EP KR); C22C 38/00 (2013.01 - EP); C23C 8/26 (2013.01 - EP KR US); C23C 8/38 (2013.01 - EP KR); C23C 8/56 (2013.01 - EP KR); C23C 8/80 (2013.01 - EP KR US); C21D 2211/008 (2013.01 - EP KR); Y02P 10/25 (2015.11 - EP)
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
DOCDB simple family (publication)
FR 3105262 A1 20210625; FR 3105262 B1 20220415; AU 2020411028 A1 20220609; BR 112022010610 A2 20220816; CA 3160425 A1 20210701; CN 114846160 A 20220802; CN 114846160 B 20240816; EP 4045689 A1 20220824; JP 2023508956 A 20230306; JP 7570420 B2 20241021; KR 20220115576 A 20220817; MX 2022007942 A 20220727; US 2023029324 A1 20230126; WO 2021130460 A1 20210701; ZA 202205809 B 20230125
DOCDB simple family (application)
FR 1915524 A 20191224; AU 2020411028 A 20201223; BR 112022010610 A 20201223; CA 3160425 A 20201223; CN 202080090077 A 20201223; EP 20851331 A 20201223; FR 2020052620 W 20201223; JP 2022538999 A 20201223; KR 20227021411 A 20201223; MX 2022007942 A 20201223; US 202017783544 A 20201223; ZA 202205809 A 20220525