Autogenous wire spraying
In autogenous wire spray all spraying materials which can be pulled in a wire shape (metals and metal alloys), are molten in a acetylene/oyxgen flame and sprayed, using compressed air, onto the workpiece. Hence a lamellar structure is created because particle by particle is slammed onto the base material.
The spray layers applied in this way are more or less impact or shock resistant. The structure of the modified layer is always micro-porous (up to 40%). This gives the ability to hold oil and thus self-lubricating properties are obtained.
Despite the flame temperature of about 2800-3000°C, autogenous wire spray is a so called cold process. I.e. the workpiece temperature during spraying will not exceed 150°C. The advantage is that any distortion or structural change of the base materials is excluded.
Features of autogenous wire spray coating
- Microporous lamellar structure
- High degree of oxidation in the coating
- Good adhesion and density of the layer
- Simple process to perform
- Versatile and reliable
- High production capacity
- Inexpensive thermal spraying process
Autogenous wire spray materials
- C- and stainless steel
- Various stainless steel alloys
- Nickel based alloys
- Copper and copper alloys
Applications of autogenous wire spraying
For locks, bridges, etc. with aluminium, zinc and their alloys
(Shielding) with tin, zinc et cetera
And traction coatings
Boiler walls or incinerators
Against high temperature erosion and chemical degradation
Repairs or size corrections
From run-in journal or bearing seats with nickel base alloys
Metalo is supplier for a.o.
More flame spraying
Flame spray is a unique and practical technique to apply a coating to almost any kind of metal and non-metal surfaces. This coating improves the basic material properties such as hardness, abrasion, scratch and corrosion resistance.
HVOF flamespray forms a coating with a high density and a high bonding value. The HVOF flamespray principle is based on a transfer of thermal and, in particular, kinetic energy from the spray particles of the substrate.
The high heat level and conductivity of the plasma flame, in combination with the very high gas- and transport velocity of the molten particles result in optimal condtions for very strong adhesion, uniformity and purity of the sprayed layer.
Electric wire spraying is a form of thermal spraying where two consumable metal wires are fed independently into the spray gun. With electrical wire spraying, coatings can be applied quickly and at low cost.