EP 0076745 B1 19851204 - PROCESS FOR TREATING THE SURFACES OF STEELS AGAINST WEAR, AND COATING OBTAINED
Title (en)
PROCESS FOR TREATING THE SURFACES OF STEELS AGAINST WEAR, AND COATING OBTAINED
Publication
Application
Priority
FR 8118780 A 19811006
Abstract (en)
[origin: US4435227A] An object of the present invention is a method for the anti-wear treatment of the surface of steel parts having a carbon content of at least 0.15% and the coating obtained thereby. The method is characterized by the fact that an addition of sulfur, by depositing of a metal sulfide for example, and a vapor-phase chromizing are carried out in sucession on the surface to be treated. The coating obtained is characterized by the presence of a layer of chromium sulfide on the surface and by the partial recrystallization of the underlying M7C3 chromium carbide layer. The invention can be applied to any moving mechanical system which is subject to abrasion. The invention has importance because it increases the resistance to wear and the life of the system treated while limiting the wear of the untreated opposing part as a result of friction.
IPC 1-7
IPC 8 full level
C23C 12/00 (2006.01)
CPC (source: EP US)
C23C 12/00 (2013.01 - EP US); Y10T 428/12535 (2015.01 - EP US); Y10T 428/12576 (2015.01 - EP US); Y10T 428/12604 (2015.01 - EP US)
Designated contracting state (EPC)
BE CH DE GB LI LU NL SE
DOCDB simple family (publication)
EP 0076745 A1 19830413; EP 0076745 B1 19851204; DE 3267828 D1 19860116; FR 2514034 A1 19830408; FR 2514034 B1 19840720; US 4435227 A 19840306
DOCDB simple family (application)
EP 82401774 A 19820930; DE 3267828 T 19820930; FR 8118780 A 19811006; US 42866182 A 19820930