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1. (WO2015043782) SLIDE RINGS HAVING A LEDEBURITIC MICROSTRUCTURE AT THE SURFACE

Pub. No.:    WO/2015/043782    International Application No.:    PCT/EP2014/064135
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Fri Jul 04 01:59:59 CEST 2014
IPC: F16J 15/34
C21D 1/09
C21D 1/40
C21D 9/40
Applicants: FEDERAL-MOGUL FRIEDBERG GMBH
Inventors: BRADL, Christoph
MATZ, Marc-Manuel
DENGLER, Andreas
KUMPFMÜLLER, Andreas
Title: SLIDE RINGS HAVING A LEDEBURITIC MICROSTRUCTURE AT THE SURFACE
Abstract:
The invention relates to a slide ring, comprising a main body composed of gray cast iron (2), wherein at least a partial region (6) of a functional surface (4) has a ledeburitic microstructure at the surface. The invention further relates to a method for producing a slide ring, comprising producing a slide ring composed of gray cast iron (2), heating a functional surface (4) of the slide ring by irradiating the functional surface of the slide ring with high-energy radiation, wherein the irradiation is performed in such a way that at least a partial region of the irradiated surface is remelted, wherein the parameters of the irradiation are selected in such a way that at least a partial region (6) of the functional surface has a ledeburitic microstructure after the functional surface has been cooled.