METHOD AND DEVICE FOR THERMAL SPRAYING

摘要

The invention relates to a method and a device for thermal spraying, in particular for arc spraying using a filler material (3), which is melted by an arc generated by means of electrodes, wherein the compressed gas (8) flows out through a nozzle (7) at high velocity and sprays the molten filler material (3) onto a prepared surface (1a), and wherein, according to the invention, the compressed gas (8) is generated with a modulated/pulsating gas flow having high velocity, whereby an undesirably developing eddy region of the molten material in the region of the ends of the filler material (3) is restricted or prevented. The device comprises a unit for generating the compressed gas (8) having high velocity and means by which the modulated/pulsating gas flow having high velocity can be generated such that particles/drops of the molten material are prevented from depositing or staying on the nozzle (7) and/or on the filler material (3) and/or particles/drops that have been deposited thereon are detached.