Wide application of thermal spraying technology on metal surface

       Metal surface thermal spraying technology is an application technology that is widely used in material surface strengthening, surface protection, surface repair and surface decoration. It can be used on the surface of various groups of engineering materials. Spraying various metals and alloys, ceramic plastics and composite materials formed by the above materials can form a firm bonding layer, so that the surface of the product can obtain special properties such as wear resistance, corrosion resistance, high temperature resistance and oxidation resistance. During the movement of mechanical parts, due to wear, corrosion or out of tolerance during processing, thermal spraying technology can be used to pre-repair. The use of thermal spraying technology can achieve the purpose of improving the service life of products, saving valuable materials, saving energy, repairing old waste, and decorating and beautifying.

  Thermal spraying technology has been widely used in aerospace, aviation, machinery, electric power, petroleum, chemical industry, metallurgy, mining, locomotives, ships, railways, etc., in almost all aspects of the national economy; it can also be used in arts and crafts, cultural relics protection, building anticorrosion and decoration, etc. aspect.

  Thermal spraying technology mainly includes: thermal spraying and flame spraying, which are suitable for the "four-tube" anti-wear, anti-oxidation, exhaust and induced draft fan blades of power plant boilers, and repair of mechanical parts and shafts.

  Operational and Quality Control Standards for Thermal Spray Technology



  1. Thermal spraying (working temperature is around 200°C)

1. Before spraying, the surface of the workpiece must be ground or sandblasted to roughen the surface of the workpiece;

2. The workpiece surface is required to be clean and clean;

3. Prime or spray directly on the surface of the sprayed workpiece;

4. Finally, the surface of the workpiece is sprayed with anti-wear, anti-corrosion, anti-oxidation and other composite powders.

Second, flame spray welding (working temperature quotient, easy to slightly deform the workpiece)

1. Derusting the metal surface before spray welding;

2. The metal surface is required to be free of rust and grease;

3. Preheat the sprayed metal surface and then prime it;

4. Finally, the sprayed metal surface is remelted to make the workpiece achieve high hardness, wear resistance and high temperature oxidation resistance.