What is Wire flame spray gun and how does wire flame spray gun work?
The Process of Wire Flame Spray gun is essentially the spraying of molten metal* onto a surface to provide a coating. Material in the wire form is melted in a flame (oxy-acetylene flame most usual) and atomized using compressed air to form a fine spray. When the spray contacts the prepared component of substrate material, the fine molten droplets quickly solidify forming a coating. This flame spray process brought out correctly is called a “cold process” (relative to the substrate material being coated) as the substrate temperature can be kept low during processing avoiding damage, metallurgical changes, & distortion to the substrate component.
This flame spray process has been extensively utilized in the past and today for machine element work & anti-corrosion coatings.
- Low capital investment
- Simple to operate
- Wire form cheaper than powder in wire flame spray gun
- Deposit efficiency very high
- Likely best for applying pure molybdenum coatings for wear resistance.
- Portable system
- Preheating facility built-in, unlike arc spraying
- Likely to use system in areas without electricity supply
Common materials Sprayed:
- Zinc & for anti-corrosion cathodic coatings on steel
- Nickel/aluminum composite wire for bond coats & self-bonding coatings
- Molybdenum for bond coats
- Molybdenum for hard bearing applications, and excellent resistance to adhesive wear, used on piston rings, synchromesh cones & journals.
- High Chromium steel for many applications requiring hard & wear-resistant coating
- Bronzes, babbitt for bearing applications
- Stainless steels, nickel, & Molybdenum for anti-corrosion and wear
- Aluminum, nickel/aluminum for heat & oxidation resistance
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