摘要:
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.
摘要:
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 2-50 percent by weight iron, FE; 5-60 percent by weight tungsten, W; 5-40 percent by weight chrome, Cr; 5-25 percent by weight nickel, Ni; 1-5 percent by weight molybdenum, Mo; 1-10 carbon, C and 0.1-2 percent by weight silicon, Si; and a running-in layer, obtained by thermal spraying of a powder comprising the element proportions 60-95 percent by weight nickel; 5-40 percent by weight carbon.
摘要:
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.
摘要:
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.
摘要:
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(CxNy) 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(CxNy) 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.
摘要:
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 (14) and a-C:H:Me coatings (16) 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.
摘要:
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.
摘要:
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.
摘要:
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 (10), a metal-containing, preferably tungsten-containing, DLC layer (12), and a metal-free DLC layer (14), 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.
摘要:
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 (16) and a-C: H: Me coatings (14) 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.