Abstract: The invention relates to a sliding surface (1), which is applied by arc spraying with the aid of a rotating tool. During the spraying process, the parameters are to be set in such a way that all the material particles are fused. The benefit of the high degree of fusion is that the sliding surface (1) can be machined by precision turning without the uncontrolled eruption of material. The rotating spraying process orientates the surface roughness on the face (1.2) of the sliding surface (1) transversally in the peripheral direction. This enables valley structures in the form of recesses (1.1) to be produced during the precision turning process, said recesses having a Peklenit factor of less than 1, achieving a high degree of flow obstruction and forming a defined oil-retaining volume.

Abstract: An inner torch for the electric-arc spraying of cavities, in particular of cylinder contact surfaces. The inner torch as at least two torch tubes for heating electrodes. The electrodes are provided for melting purposes and are designed as wires which can be burned away in an electric arc. The inner torch also has a gas feed for a process gas which is provided for transporting and spraying the molten wire material in the direction of the cavity surface which is to be coated. The wires are guided towards one another, by way of the torch tubes, wherein at the outlet and in the region of the electric arc, the electric arc of the electrodes wires, which is arranged in the contact region of the wires, is arranged in the region of the flow of the discharged process has, referred as the main gas arranged transversely to the main transporting direction of the wires. Furthermore, in addition to being bent towards one another, the wires are also bent transversely to this direction.

Abstract: An inner torch for the electric-arc spraying of cavities, in particular of cylinder contact surfaces. The inner torch as at least two torch tubes for heating electrodes. The electrodes are provided for melting purposes and are designed as wires which can be burned away in an electric arc. The inner torch also has a gas feed for a process gas which is provided for transporting and spraying the molten wire material in the direction of the cavity surface which is to be coated. The wires are guided towards one another, by way of the torch tubes, wherein at the outlet and in the region of the electric arc, the electric arc of the electrodes wires, which is arranged in the contact region of the wires, is arranged in the region of the flow of the discharged process has, referred as the main gas arranged transversely to the main transporting direction of the wires. Furthermore, in addition to being bent towards one another, the wires are also bent transversely to this direction.