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The extrudable materials for this process are metals and alloys that can be drawn into a wire shape, and have a melting point that is far below the temperature of the heat source used.
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Autogenous wire spraying or wire flame spraying is the oldest process in thermal spray technology. Using an electric or air motor a material is transported as a wire through a spray gun and melted down centrally in a burning gas-oxygen mixture (usually acetylene-oxygen). Subsequently, compressed air is used to spray the molten material onto the substrate to form a coating.
The extrudable materials for this process are metals and alloys that can be drawn into a wire shape, and have a melting point that is far below the temperature of the heat source used. If zinc, aluminium, or a zinc-aluminium alloy is used for the wires, it is also called metal spraying.
Material Form: Wire (sometimes cord or rod shape)
Thermal energy source: by combustion of a fuel and oxygen
Process fuel: propane, hydrogen, acetylene
Process temperature: < 4,000ºC
Spray particle speed: < 150 m/s
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