Flamespray: Autogenous powderspray
Using an acetylene-oxygen flame at a temperature of approx. 3000-3200 ° C, the spray material is metered accurately in powder form, is melted and atomized. Followed by a heat treatment at about 1050 -. 1150 º C, where the fusing takes place
The autogenous powderspray process
Using autogenous powderspray, a variant of flamespray, spray this process, metals, alloys and metallic compounds are sprayed. The material in powder-form is melted and sprayed in a gas/oxygen flame that can reach temperatures up to 3,200°C. Using autogenous powder alloy coatings such as nickel-chromium and tungsten carbide (the cobalt alloys) can be sprayed.
The result is a metallurgical bond having a diffusion area of a few tens of microns. The typical characteristic microporous lamellar structure of the cold spray process is no longer present. The coatings of autogenous powderspray have homogeneous structure .
The layers are made ofnickel, chromium or cobalt optionally with additions of Wolframcarbiden and are supplied in a hardness of Rc 30 to Rc 75. The oxyfuel spraying powder is mainly used for applying meltingalloys.