Thermal Spraying is a process used to form a continuous coating by melting consumable material into droplets and impinging these droplets on the substrate, to impart properties unobtainable by base metal selection alone. The mechanism of bonding to surface in thermal sprayings is both mechanical interlocking and atomic interaction, with the shear strength around 7 MPa (10 ksi). The thickness of the coatings may range from 25 µm to 2.5 mm (0.001 – 0.1 in). Coating materials include metals, alloys, carbides, ceramics, plastics, cermets, and special structures comprising combinations of the above.




    Typical Applications

    Thermal spray coatings are used for a broad range of applications within the field of wear protection and other requirements:

  • Abrasion: Piston Rods, Shaft Bushes.
  • Erosion: Pump Impellers, Mixing Units.
  • Adhesion: Shrink Fits, Bearings, Combustion Chambers.
  • Electrical Insulation: Insulation at elevated temperatures.
  • Thermal Barrier: Combustion Chambers.
  • High-temperature Corrosion: Steel Components.
  • Abradability: Labyrinths, Rotating Compressors.
  • Repair, Restoration: All Kinds of applications.
Benefits

Stability
Thermal spraying process involves high levels of thermal and kinetic energies,
it imparts very little heat to the substrate – less than 150°C (300°F) – thereby avoiding metallurgical change, distortion,
and oxidation to the base part.

Versatility
Thermal spraying offers industrial design maximum flexibility, due to its nearly unlimited usable materials selection. The combination of low temperature and high bond strength, allows thermal spray coatings to be selectively applied to specific part areas using a variety of masking processes, reducing manufacturing costs by eliminating unnecessary processing steps.


  Improvement
Applying the appropriate coatings is possible to improve part performance, dramatically lengthen its useful life.
Costs Reduction
Using Thermal Spraying,Spraying, engineers can design less costly base materials parts and just "spot coating" critical wear areas. Otherwise, scrap parts can be reclaimed by restoring dimensions with coatings.
 

Competitive Advantages
Thermal Spray can create component parts with unique technological features, eliminating manufacturing processes like heat treating and chrome plating, and reduce grinding/machining operations.
 
 
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Desarrollado por César Muñoz y Karen Ramírez
año 2003