Abstract: A plasma transfer wire arc thermal spray system includes a section for feeding a wire acting as a first electrode, a source of plasma gas providing plasma gas, a nozzle directing the plasma gas stream from the source of plasma gas to a free end of the wire, and a second electrode located in the plasma gas stream towards the nozzle. In certain instances, the nozzle is made at least partially of electrically insulating material. The thermal spray apparatus with the inventive spray gun may have a simplified and faster starting procedure and the spray nozzle can be more durable.

Abstract: The invention relates to a material composition for a coating for components of internal combustion engines, selected from one of the three material compositions indicated in the following table: formula. C Mn Cr B Si Fe 1. variant 0.1-5% 0.1-3% ?0-2% 0.0-1% remainder 2. variant 0.1-5% 0.1-3% 1-13% 0.1-10% remainder 3. variant 0.1-5% 0.1-3% 8-30% 0.

Abstract: A brake drum for a vehicle includes a friction ring and a drum body. The friction ring has grooves arranged on a radial outer surface along a circumference, and a coating formed on the grooves. The drum body is cast onto the radial outer surface of the friction ring so that the grooves are filled with a material of the drum body. The grooves include first grooves and second grooves. A first axial segment is formed at the friction ring in which the first grooves are introduced so that the first grooves are inclined relative to a first axial end of the friction ring. A second axial segment is formed at the friction ring in which the second grooves are introduced so that the second grooves are inclined in a direction which is opposite to that of the first axial segment. Each of the grooves have undercuts.

Abstract: A plasma transfer wire arc thermal spray system includes a section for feeding a wire acting as a first electrode, a source of plasma gas providing plasma gas, a nozzle directing the plasma gas stream from the source of plasma gas to a free end of the wire, and a second electrode located in the plasma gas stream towards the nozzle. In certain instances, the nozzle is made at least partially of electrically insulating material. The thermal spray apparatus with the inventive spray gun may have a simplified and faster starting procedure and the spray nozzle can be more durable.

Abstract: In one or more embodiments, the invention relates to a plasma transfer wire arc thermal spray system, comprising a section for feeding a wire acting as a first electrode, a source of plasma gas providing plasma gas, a nozzle directing the plasma gas stream from the source of plasma gas to a free end of the wire, and a second electrode located in the plasma gas stream towards the nozzle. In certain instances, the nozzle is made at least partially of electrically insulating material. The thermal spray apparatus with the inventive spray gun may have a simplified and faster starting procedure and the spray nozzle can be more durable.

Abstract: A brake drum for a vehicle includes a friction ring and a drum body. The friction ring has grooves arranged on a radial outer surface along a circumference, and a coating formed on the grooves. The drum body is cast onto the radial outer surface of the friction ring so that the grooves are filled with a material of the drum body. The grooves include first grooves and second grooves. A first axial segment is formed at the friction ring in which the first grooves are introduced so that the first grooves are inclined relative to a first axial end of the friction ring. A second axial segment is formed at the friction ring in which the second grooves are introduced so that the second grooves are inclined in a direction which is opposite to that of the first axial segment. Each of the grooves have undercuts.

Abstract: The invention relates to a device for thermally coating a surface, which has at least one housing (6), a cathode (9), a primary gas distributor (11), a secondary gas distributor (12), electrically and thermally acting insulation elements (13, 14, 16), and an anode, which is designed as a consumable wire and is guided into a nozzle (19, 21) by means of a wire guide (18), wherein the nozzle (19, 21) is mounted in a centered manner and has openings (23) arranged radially in one plane on one of its sides (22).

Abstract: The invention relates to a device for thermally coating a surface, which has at least one housing, a cathode, which is designed as a consumable wire and at least one insulation element, wherein the housing has a non-detachable anti-adhesion layer.

Abstract: A thermal spraying method for coating an inner surface of a cylinder of an internal combustion engine or a piston engine. The method includes applying a thermal spray layer to the inner surface of the cylinder via a spray jet which is emitted by a spray torch and which includes a spray material, optically monitoring, via an optical sensor device, surroundings of the spray jet as defined by a space outside the spray jet, and assuming a coating process to be defective if the optical sensor device detects one or more particles of the spray material supplied to the spray torch in the surroundings monitored outside the spray jet and a parameter of the one or more particles exceeds a defined threshold.

Abstract: A thermal spraying method for coating an inner surface of a cylinder of an internal combustion engine or of a piston engine. The method includes applying a thermal spray layer onto the inner surface of the cylinder so as to obtain a coated inner surface, inserting an optical sensor device into the cylinder, and scanning the coated inner surface via the optical sensor device in order to detect at least one of a ridge and an indentation in the thermal spray layer. A thermal spray torch for the method includes an optical sensor device which is inserted into the cylinder and to scan the coated inner surface of the cylinder so as to detect at least one of a ridge and an indentation in the coated inner surface.

Abstract: A coating for components of internal combustion engines, in particular for cylinder and/or piston surfaces that includes chromium with a mass fraction between 1 and 30%, iron with a mass fraction between 0 and 50%, carbides and/or oxides with a mass fraction between 0 and 50%, and a solid lubricant with a mass fraction between 0 and 30%.

Abstract: A method for producing a cylinder running surface of a cylinder crankcase of an internal combustion engine includes thermally spraying a coating material comprising particles onto a cylinder inner wall of a cast cylinder crankcase using an inert gas as an atomizer gas so as to produce a coating. A mass feed rate of the coating material during the thermal spraying is 8 to 22.5 kg/h.

Abstract: An apparatus for thermally coating a surface, including at least one housing, a cathode, a primary gas distributor, a secondary gas distributor, electrically and thermally effective insulation elements and an anode which is designed as a consumable wire and is guided into a nozzle by a wire guide, the nozzle being mounted in a centered manner and having openings on one of its sides which are radially arranged in one plane.

Abstract: The invention relates to a device for thermally coating a surface, which has at least one housing, a cathode, which is designed as a consumable wire and at least one insulation element, wherein the housing has a non-detachable anti-adhesion layer.

Abstract: A method for roughening and thermally coating a surface, in particular a cylinder running surface of an internal combustion engine, the roughening being the preparation of the surface for the thermal coating of the surface with a coating. The method is characterized in that different roughening profiles are introduced into the surface during the roughening and the coating has different properties distributed over the surface. This allows the coating or spraying process during the later thermal coating to be carried out with substantially constant spraying parameters. The different properties of the coating, such as hardness, porosity, machinability, chemical composition, oxidation and adhesion, are then obtained just on the basis of the differently roughened surface.

Abstract: A device for the thermal coating of a surface, having a wire supply unit for the supply of a wire, wherein the wire acts as a first electrode, a source for plasma gas for generating a plasma gas stream, a nozzle body with a nozzle opening through which the plasma gas stream is conducted as a plasma gas jet to one wire end, and a second electrode which is arranged in the plasma gas stream before the latter enters into the nozzle opening The device is characterized in that the wire supply unit is adjustable, whereby the wire end situated in front of the nozzle opening can be moved by a certain adjustment travel. In this way, it is possible for installation tolerances in the device to be easily compensated, and high and consistent quality of the coating is attained.

Abstract: A method of repairing an inner surface of a cylinder liner housed in an engine block. Material is removed from the inner surface to produce a reduced-thickness region, the reduced-thickness region extending axially relative to the cylinder and stopping short of an end of the liner to leave a region of original diameter between the reduced thickness region and the end of the liner. The surface the reduced-thickness region is then roughened, for example by hammer brushing. A plasma coating is applied to the reduced-thickness region and to at least a portion of the region of original diameter. The coating is then finish-machined to produce a uniform internal diameter equal to an original internal diameter of the region of original diameter prior to the application of the coating.

Abstract: A block for an internal combustion engine having at least one coated cylinder bore, which has a chamfer at a sealing surface with respect to a cylinder head, wherein the chamfer is a curved chamfer.

Abstract: The application relates to a process for producing a coating by thermal spraying, in particular by plasma spraying, in which a component, in particular a cylinder liner, is internally coated with an alloy. It is proposed that nitrogen is fed as transporting gas, a spraying additive being a solid alloy wire which is guided into a plasma stream, and coating being performed without additional powder.

Abstract: The application relates to a process for producing a coating by thermal spraying, in particular by plasma spraying, in which a component, in particular a cylinder liner, is internally coated with an alloy, wherein a plasma nozzle, to which a plasma gas and a transporting gas are fed, rotates about a wire and is movable along a longitudinal axis of the bore, such that the bore is coated as seen from the inside all around and in the axial direction of the bore. What is proposed is a variable gas stream or a variable flow rate of the transporting gas and/or of the plasma gas, it being possible for the flow rate to be set over the axial length (x) of the bore to be coated.