Flame
Flame spray coating is the most basic form of thermal spray and one of the oldest, using oxygen and acetylene to melt wire or powder material and apply it to a part. At HTS Coatings it is the most economical solution for wear-resistant surface enhancement and the restoration of damaged machine parts.
What is flame spray?
Flame spray coating is the most basic form of thermal spray and one of the oldest. It's tried and true techniques provide great restoration for damaged machine parts. Flame spray at HTS Coatings is typically performed using oxygen and acetylene and can be sprayed with either wire or powder materials. Flame spray melts these materials in the combustion stream and applies the material to the part.
Flame Spray Solutions
Flame spray can easily repair surface erosion but is also good for larger surface gouges since it can deposit large amounts of material easily. The flame spray gun is designed to be sprayed robotically and can spray inner diameter (I.D.) and outer diameter (O.D.) surfaces. It can also be transported to a site for field service repairs of larger machine parts. Flame spray is the most economical solution if one is seeking wear resistant surface enhancement.
Common Coating Solutions
- Abradable coatings
- Metals
- Alloys
- Composites
- Self-fluxing
- Aluminum Oxides Cermets
Common Coating Materials
- Stainless steel
- Bronze
- Babbitt
- Nickel aluminum
How it works
Flame spray is typically performed using oxygen and acetylene, and can be sprayed with either wire or powder materials. The material is melted in the combustion stream and applied to the part.
Flame Spray Process Diagram for Wire Materials — feedstock is supplied as wire, fed into the oxy-acetylene flame, melted, and propelled onto the part surface.
Flame Spray Process Diagram for Powder Materials — feedstock is supplied as powder, fed into the oxy-acetylene flame, melted, and propelled onto the part surface.
Flame Spray Coating Properties
| Property | Value |
|---|---|
| Operating Cost | Economical |
| Bond Mechanism | Mechanical (1,000-5,000 psi) |
| Max Flame Temperature | 5,600° F |
| Particle Velocity | 160-300 ft/sec |
| Max Spray Rate | 20 lbs/hr |
| Coating Thickness Range | 0.005" to 0.250" |
| Special Features | Economical, no heat distortion |
| Wear Resistance | Acceptable |
| Corrosion Resistance | Poor to Medium |
| Porosity | High |
Advantages
- Most economical thermal spray solution for wear-resistant surface enhancement
- Deposits large amounts of material easily, making it well suited to larger surface gouges as well as surface erosion
- No heat distortion
- Can be sprayed robotically on both inner diameter (I.D.) and outer diameter (O.D.) surfaces
- Portable to a site for field service repairs of larger machine parts
- Sprays either wire or powder materials
Common applications
- Shaft enhancement or repair
- Bearing housing enhancement or repair
- Casting repairs
- Mold dye enhancement or repair
Thinking about Flame for a part?
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