Goetze Ag

Goetzewerke Friedrich Goetze A.g.

Ulrich Buran

Horst Beyer

Manfred Fischer

Hans-Jochem Neuhauser

Hans J Neuhauser

Martin Morsbach

Norbert Dautzenberg

Hans J Neuehauser

Rudolf Linde

Joseph Hewing

Hans-Joachim Neuhauser

Solid particles of primarily hard substances, solid lubricants, ductile metals or their alloys and/or molten polymers are embedded in a network of cracks of hard chromium coatings to attain improved physical characteristics, primarily to increase wear resistance, sliding behavior, ductility and corrosion resistance. The chrome plating process takes place in a microcrack-forming chrome-plating electrolyte with solid particles dispersed therein and with one-time or repeated current reversal so that, if the workpiece is connected to the anode, the network of microcracks in the chromium coating is widened and solid particles are embedded within the cracks. Preferred uses are as coatings on the bearing surfaces of piston rings or cylinder bearing sleeves for internal-combustion engines.

Electrolytically deposited hard chronium coatings

Friction-reducing coating compositions and coated machine parts having a wearing surface provided with coatings of same. In one embodiment, the coating composition includes from 10 to 25 weight % molybdenum metal; from 55 to 70 weight % nickel alloy; and from 5 to 25 weight % chromium carbide Cr.sub.3 C.sub.2. In a second embodiment, the coating composition includes from 25 to 45 weight % molybdenum metal; from 45 to 60 weight % nickel alloy; and from 5 to 25 weight % of a hard substance selected from chromium metal, chromium carbide Cr.sub.23 C.sub.6 and molybdenum carbide Mo.sub.2 C. Preferably the nickel alloys contain from 73 to 95 weight % nickel and have a melting point below that of nickel metal. Preferably the friction-reducing coating is applied to a wearing surface by plasma flame spraying. These coatings impart excellent wear resistance to the wearing surface, while lowering wear of counter-running faces.

Friction-reducing coating compositions and coated machine part

Wear-resistant coating on a machine part which is subject to friction wear, the coating being applied by a flame spray process and being composed of a plurality of superposed sprayed-on layers each differing in structure or composition from each layer adjacent thereto.

Wear-resistant coating

A spray powder for the production of wear resistant coatings on the bearing and friction faces of machine parts subjected to sliding friction, comprising 20 to 60 weight percent molybdenum, 25 to 50 weight percent molybdenum carbide and up to 30 weight percent of a low melting point alloy.

Spray powder for producing wear resistant coatings

A sprayed-on wear-resistant coating which is carried on a substrate constituted by a machine part surface, has an inner face oriented towards the substrate and an outer face oriented away from the substrate. The coating consists of a material whose structure and/or composition continuously varies from the inner face of the coating towards the outer face thereof.

A spray powder for the manufacture of wear resistant and temperature resistant coatings, the powder comprising 50 to 90 weight percent aluminum oxide (Al.sub.2 O.sub.3) and 5 to 40 weight percent titanium dioxide (TiO.sub.2) with additives in the form of 5 to 30 weight percent lanthanum oxide (La.sub.2 O.sub.3) and/or niobium oxide (Nb.sub.2 O.sub.5), possibly together with 30 weight percent calcium carbonate (CaCO.sub.3).

Spray powder for the manufacture of wear resistant and temperature

A wear-resistant coating is provided for a sealing strip used in a rotary engine having a trochoidal chamber made of a supereutectic aluminum-silicon alloy. The coating consists essentially of chromium or a chromium alloy applied by plasma deposition welding.

Wear-resistant coating for sealing strips in rotary engines

A machine part, such as a piston ring or sealing strip for an internal combustion engine, having one surface arranged to be in sliding contact with a cooperating part to thus be subjected to friction wear, the machine part being provided with a recess extending inwardly from the one surface and presenting at least one lateral wall, and the machine part comprising a layer of material different from the material of the machine part, which layer is disposed in the recess at the sliding surface, in which the layer is held in the recess in a manner such that no bond exists between the layer and the lateral wall.

Friction wear experiencing machine part having a coating on its sliding

Plasma deposition welding powder for the production of a wear-resistant coating on machine parts subject to friction consists essentially of a mixture of two components A and B, of which component A is present at 70 to 99.5 weight percent of the total of A and B. Component A comprises at least one metal selected from the group consisting of molybdenum and tungsten. Component B is present at 0.5 to 30 weight percent of the total of A and B and consists essentially of at least one alloy or compound of at least one of the metals selected from the group consisting of cobalt, chromium, iron, nickel, copper and manganese, with at least one of the elements selected from the group consisting of phosphorus, boron and silicon.

Plasma deposition welding powder for producing wear resistant layers

A spray powder is provided for the manufacture of layers having a high resistance to wear and burn traces on the bearing surfaces of engine parts which are subject to friction. The spray powder consists essentially of a powder mixture of about 30 to about 80 weight percent iron, about 0.1 to about 60 weight percent of at least one Group VIB metal selected from the group consisting of molybdenum and tungsten, and about 4 to about 50 weight percent boron.

Spray powder for the manufacture of layers having high resistance to

A sinterable material for use as sealing strips for rotary piston engines, the material being based on a known mixture of iron and vanadium carbide and further including a material which will be liquid at the sintering temperature and which will wet the carbide grains and partially dissolve them to give them a rounded form in the finished strip.

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Burscheid, Germany

Ulrich Buran