Abstract: A thermal spraying method is provided, wherein spray particles of a powdered spray material are introduced into a hot carrier gas stream, heated by the carrier gas stream and then sprayed onto the surface of a substrate by a spray nozzle, wherein the temperature of the spray particles upon impact onto the substrate is below the melting temperature of the spray material. The spray particles are heated in the hot carrier gas stream upstream of the nozzle throat to a temperature that causes at least partial melting of the spray particles in that location.

Abstract: A method for the subsequent treatment of welded connections is shown and described. The object of providing a method for the subsequent treatment of a weld by which the tensile stresses in the region of the weld are reduced is achieved by applying a top layer to the weld on a workpiece by cold-gas spraying.

Abstract: The invention relates to a nozzle for cold gas spraying in which gas and spraying particles are accelerated. According to the invention, the cold gas spraying nozzle is at least partially coated at its inner wall.