Federal-mogul Burscheid Gmbh

Michael Zinnabold

Marcus Kennedy

Marc-Manuel Matz

Ralf Lammers

Manfred Fischer

Steffen Hoppe

Yuriy Ivanov

Robert Reuven Aharonov

Peter Esser

Steffan Hoppe

Han-Rainer Brillert

Hans-Rainer Brillert

A sliding element, such as a piston ring, for use in diesel or highly supercharged spark-ignition engines with iron-based mating running elements is provided. The sliding element includes a base material made of cast iron or steel and a coating. The coating includes a CrN layer, an Me(CN) layer, and a DLC layer extending from the inside to the outer side respectively. The DLC layer consists of a metal-containing substructure layer and a metal-free DLC top layer. The Me(CN) layer is crystalline and Me is tungsten (W), chromium (Cr), or Silicon (Si). The hardness of the metal-free DLC top layer is harder than the metal-containing substructure layer.

Sliding element, in particular piston ring, and combination of a sliding element with a mating running element

The invention relates to a sliding element, in particular a piston ring, having a carbon-based coating and at least in sections, a surface roughness (R) according to DIN EN ISO 4287 of 0.05, preferably 0.08, to 0.11, preferably to 0.1 &#x3bc;m.

Sliding element, in particular piston ring

The invention relates to a novel wear-protection layer for piston rings of internal combustion engines and a method for applying a wear-protection layer of this type during production of a piston ring. The protective layer is characterized inter alia by reduced wear and high resistance to scuffing.

Wear-protection layer for piston rings

The invention relates to a sliding element, such as a piston ring, having a coating on at least one running surface, which comprises, from the inside out, an adhesive layer (), a metal-containing, preferably tungsten-containing, DLC layer (), and a metal-free DLC layer (), and is characterized in that the ratio of the thickness of the metal-free DLC layer to the thickness of the metal-containing DLC layer ranges from 0.7 to 1.5 and/or to the overall thickness of the coating ranges from 0.4 to 0.6.

Sliding element having a coating

The invention relates to a sliding element, in particular a piston ring, having at least one running surface. The running surface comprises a coating, which from the inside to the outside has at least one first adhesive layer, a hard hydrogen-free DLC layer, a second adhesive layer, a soft hydrogen-containing, metal and/or metal carbide-containing DLC layer, which is softer than the hard hydrogen-free DLC layer, and a hard hydrogen-containing DLC layer, which is harder than the soft hydrogen-containing, metal and/or metal carbide containing DLC layer.

Sliding element, in particular a piston ring, having a coating

The present application relates to a sliding element, in particular a piston ring, having at least one sliding surface which has a coating which has, from the inside outwards, a metal-containing bonding layer and a DLC layer, where the DLC layer is an amorphous hydrogen-free diamond-like carbon layer which has a DLC main layer which extends from the bonding layer to an adjoining DLC covering layer and has a carbon content of more than about 98.5 at %, oxygen and/or hydrogen and/or nitrogen in a proportion of in each case less than about 0.5 at % and an sp2/sp3 ratio of the carbon in the range from about 1 to about 3, and a DLC covering layer which extends from the DLC main layer to the surface of the sliding element and has a lower carbon content and/or higher oxygen content and/or higher hydrogen content compared to the main layer and also metals and/or metal oxides and an sp2/sp3 ratio of the carbon in the range from about 1 to about 3.

The present invention relates to a wear-resistant layer, which is preferably used on piston rings for internal combustion engines. The wear-resistant layer comprises: 15-25% by weight iron (Fe), 10-25% by weight tungsten carbide (WC), 30-40% by weight chromium (Cr), 10-25% by weight nickel (Ni), 10-25% by weight molybdenum (Mo), 1-10% by weight carbon (C), 0.1-2% by weight silicon (Si), wherein Cr is present in elemental form and/or as a carbide in the form of CrC. A method for applying the wear resistant layer and a piston ring having such a wear resistant layer are also disclosed.

Wear protection layer for piston rings

A sliding element, in particular a piston ring or a cylinder liner, comprising at least one a-C:H:Me layer, where Me is germanium and silicon, having a layer thickness of 10-40 &#x3bc;m, is provided.

Method for producing a piston ring having embedded particles

A method for producing a piston ring for an internal combustion engine includes providing, a substrate and applying a coating by means of thermal spraying of a powder including solid lubricants on the substrate, having the elemental proportions of 15-30% by weight of iron, Fe; 15-30% by weight tungsten, W; 25-35% by weight of chromium, Cr; 10-35% by weight of nickel, Ni; 1-5% by weight of molybdenum, Mo; 0.2-3% by weight of aluminum, Al; 3-20% by weight of copper, Cu; 1-10% by weight of carbon, C; 0.1-2% by weight of sulfur, S; and 0.1-2% by weight of silicon, Si. The resultant piston ring and coating are also provided.

Piston ring having a thermally sprayed coating and method for producing same

A sliding element, in particular a piston ring, preferably made of cast iron or steel, has a coating which has a plurality of layers of CrN () and a-C:H:Me coatings () alternately. In a method for coating the sliding element, in particular a piston ring, preferably made of cast iron or steel, a plurality of layers of CrN and a-C:H:Me coatings are applied alternately.

Sliding element and method for coating a sliding element

The invention relates to a sliding element, such as a piston ring, comprising a coating on at least one surface comprising, form inside to outside, a bonding layer, a metal DLC layer preferably containing tungsten, and a metal-free DLC layer doped with nitrogen at least in some regions, wherein said sliding element is characterized in that the nitrogen content in the metal-free DLC layer is graduated.

A helical compression spring, preferably of steel, in particular CrSi steel or CrNi steel, comprises a coating which has at least one a-C: H: Me coating or a plurality of layers of CrN () and a-C: H: Me coatings () alternately. In a method for coating a helical compression spring, preferably of steel, a plurality of layers of CrN and a-C: H: Me coatings are applied alternately.

Helical compression spring for an oil scraper ring of a piston in an internal combustion engine and method for coating a helical compression spring

A sliding element, particularly a piston ring for an internal combustion engine, includes a substrate, and a wear-protection layer, obtained by thermal spraying of a powder comprising the element proportions

Sliding element having adjustable properties

A sliding member for an internal combustion engine includes: a substrate and a coating obtainable by thermally spraying a powder, having the element proportions of 55 to 75 wt % of chromium, Cr; 3 to 10 wt % of silicon, Si; 18 to 35 wt % of nickel, Ni; 0.1 to 2 wt % of molybdenum, Mo; 0.1 to 3 wt % of carbon, C; 0.5 to 2 wt % of boron, B; and 0 to 3 wt % of iron, Fe.

Sliding member having a thermally sprayed coating and method for producing same

A sliding element, and in particular a piston ring, is provided with a DLC coating on a substrate of the sliding element. A material softer than DLC is embedded into the surface of the DLC coating with which the sliding element will come into contact with a sliding partner, against which the sliding element will slide.

Growing community of inventors

Burscheid, Germany

Michael Zinnabold