Flame spray is ideal for coating cylindrical parts. Powder is fed into a fixed oxy-acetylene or oxy-hydrogen flame and projected towards the base material. The semi molten material forms a mechanical bond that, when fused to the workpiece, creates a metallurgical bond. High hardness alloys and tungsten carbide mixtures can be used.
Deposition rates are from 1-9 kg/hour and surfacing thickness from 0,1 - 3 mm.