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: 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 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: 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: 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 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: 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.