Slide rings having a ledeburitic microstructure at the surface
AssigneeFederal-Mogul Friedberg GmbH
InventorsChristoph Bradl, Marc-Manuel Matz, Andreas Dengler, Andreas Kumpfmuller
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Abstract
A slide ring includes a main body composed of grey cast iron, wherein at least a partial region of a functional surface has a ledeburitic microstructure at the surface. A method for producing such a slide ring includes heating a functional surface of the slide ring by irradiating with high-energy radiation, wherein the irradiation is carried out so that at least a partial region of the irradiated surface is remelted, wherein the parameters of the irradiation are selected so that at least a partial region of the functional surface has a ledeburitic microstructure after cooling.
Claims6
A method for making a slide ring, comprising
- producing a slide ring of grey cast iron,
- heating a sliding surface of the slide ring by irradiating with radiation,
- wherein the irradiating is earned out so that at least a partial region of the irradiated surface is remelted to define a remelted partial region,
- wherein parameters of the irradiation are selected so that at least a partial region of the sliding surface has a ledeburitic microstructure after cooling, and further wherein
- particles of at least one carbide and/or a self-lubricating substance, are additionally introduced by dispersion into the remelted partial region.
Dependencies are inferred from the claim text.