Patent application number | Description | Published |
20110081540 | WEAR-RESISTANT COMPONENT - The present invention pertains to wear-resistant components for internal combustion engines, particularly piston rings, that feature a wear protection layer with iron base alloy on their surface that is subjected to wear and are characterized in that the components are manufactured of a coating powder by means of high-velocity flame spraying (HVOF) and the coating is single-phase, wherein the proportions of the elements Fe, Cr, B and C in the wear protection layer are 45-75 wt.-% Fe, 15-40 wt.-% Cr, 1-10 wt.-% B and 0.1-5 wt.-% C. The present invention furthermore pertains to a method for manufacturing wear-resistant components for internal combustion engines, particularly piston rings, according to the present invention. | 04-07-2011 |
20110101621 | WEAR-RESISTANT COMPONENT - The present invention pertains to wear-resistant components for internal combustion engines, particularly piston rings, especiallly piston rings that feature a wear protection layer with iron base alloy on their surface that is subjected to wear and are characterized in that they are manufactured of a coating powder by means of high-velocity flame spraying (HVOF), wherein the coating is single-phase and comprises the elements Fe, Cr, V and C, and wherein VC forms mixed crystals and also leads to a dispersion strengthening. The present invention furthermore pertains to a method for manufacturing wear-resistant components for internal combustion engines, particularly piston rings, according to the present invention. | 05-05-2011 |
20110109048 | METHOD AND DEVICE FOR PRODUCING A DISPERSION-HARDENED OBJECT THAT CONTAINS CARBIDE NANOPARTICLES - A method for producing a dispersion-hardened object which contains carbide nanoparticles comprises producing an object by means of a thermal spraying method, wherein downstream of the combustion chamber, the gas flow is supplied by means of a carrier gas with at least one precursor which reacts in the gas flow to form a carbide, or carbide nanoparticles are supplied via an external nanoparticle generator which is subject to a thermal load. It allows the production of a dispersion-hardened object such as, for example, a component for an internal combustion engine, for example a piston ring. The method is carried out by means of a thermal spraying device which, downstream of the combustion chamber, besides at least one line for supplying a thermal spray powder, further comprises at least one line for supplying a precursor by means of a carrier gas. | 05-12-2011 |
20110256366 | METHOD FOR COATING A SLIDING ELEMENT AND SLIDING ELEMENT, IN PARTICULAR A PISTON RING OR CYLINDER LINER OF AN INTERNAL COMBUSTION ENGINE - In a method for coating a sliding element, in particular a piston ring or a cylinder liner of an internal combustion engine, DLC phases are embedded into a hard material layer as said hard material layer is deposited. A sliding element, such as a piston ring or a cylinder liner of an internal combustion engine, comprises a hard material layer with embedded DLC phases. | 10-20-2011 |
20120067203 | SLIDING ELEMENT WITH EXPOSED FUNCTIONAL SURFACE - The invention relates to a sliding element, which comprises a support and a coating applied by means of thermal spraying on the support, wherein the coating comprises at least two phases and at least one of the at least two phases is recessed in respect of the other phase of phases. | 03-22-2012 |
20120088093 | METHOD FOR COATING A SLIDING ELEMENT AND SLIDING ELEMENT, IN PARTICULAR A PISTON RING - The invention relates to a method wherein nanoparticle are first produced and then infused in the coating during the coating process by means of a PVD and/or CVD method. A sliding element comprises a coating formed by means of a PVD and/or CVD method comprising separately produced nanoparticles. | 04-12-2012 |
20120126487 | SLIDING MEMBER HAVING A THERMALLY SPRAYED COATING AND METHOD FOR PRODUCING SAME - 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. | 05-24-2012 |
20120161401 | GLIDING ELEMENT - The invention relates to a gliding element of an internal combustion engine, especially a piston ring, having a DLC coating of the ta-C type which has at least one residual stress gradient, a negative residual stress gradient being present in a center region (II) of the coating, when seen from the outside to the inside, said gradient being preferably smaller than in an inner region (III), the inner region (III) having a smaller layer thickness than the center region (II). | 06-28-2012 |
20120205875 | SLIDING ELEMENT, IN PARTICULAR A PISTON RING, HAVING A COATING - 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 ( | 08-16-2012 |
20120306158 | SLIDING ELEMENT HAVING ADJUSTABLE PROPERTIES - 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
| 12-06-2012 |
20130004756 | SLIDING ELEMENT, IN PARTICULAR A PISTON RING, AND METHOD FOR COATING A SLIDING ELEMENT - 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 ( | 01-03-2013 |
20130042845 | 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, preferably made of cast iron or steel, comprising a coating having a CrN, an Me(C | 02-21-2013 |
20130084031 | SLIDING ELEMENT WITH DLC COATING - 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. | 04-04-2013 |
20130136861 | METHOD FOR COATING AT LEAST THE INNER FACE OF A PISTON RING AND PISTON RING - In a method for coating at least part of the inner face of a piston ring, said ring preferably consisting of cast iron or steel, a PVD and/or DLC coating is applied by means of at least one of the following methods: PA-CVD, glow discharge and/or HIPIMS. A piston ring has a coating that is formed at least on part of the inner face of said ring, said coating being a PVD and/or DLC coating that preferably has been applied by means of PA-CVD, glow discharge and/or HIPIMS. | 05-30-2013 |
20130140776 | SLIDING ELEMENT, IN PARTICULAR PISTON RING, HAVING A COATING AND PROCESS FOR PRODUCING A SLIDING ELEMENT - A sliding element, in particular piston ring, has on at least one running surface, from the inside outwards, a coating having a metal-containing adhesive layer and a ta-C type DLC layer with a thickness of at least 10 μm. | 06-06-2013 |
20130168906 | 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 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 ( | 07-04-2013 |
20130181409 | PISTON RING HAVING A THERMALLY SPRAYED COATING AND METHOD FOR PRODUCING SAME - 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. | 07-18-2013 |
20130192458 | METHOD FOR PRODUCING A PISTON RING HAVING EMBEDDED PARTICLES - 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 μm, is provided. | 08-01-2013 |
20130316156 | SLIDING ELEMENT, IN PARTICULAR A PISTON RING, HAVING A COATING - 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. | 11-28-2013 |
20140284882 | WEAR PROTECTION LAYER FOR PISTON RINGS - 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 Cr | 09-25-2014 |