Shot Blast Nozzles
Hot (or sand) blasting is a method of surface preparation or cleaning. It involves blasting an abrasive grit, such as sand, alumina or chill-cast iron, at high velocities at the surface to be treated through a nozzle which is lined with wear resistant material. Sialon and silicon nitride advanced ceramic shot / sand blast nozzle liners are extremely effective in this application.
Sialons are alloys of silicon nitride and possess outstanding wear resistant properties. The shot / sand blast nozzle liners must be extremely wear resistant. International Syalons manufacture a range shot / sand blast nozzles from Syalon 050, which has a high hardness, fracture toughness and Young's modulus, resulting in excellent wear resistant properties.
Traditionally liners have been made from tungsten carbide. However, at the low angle impacts encountered in many blasting operations, tungsten carbide wears excessively due to the erosion of the relatively soft and ductile cobalt used to cement the carbide grains together.
Syalon 050 has been shown to outperform many competitive materials, such as alumina and tungsten carbide. For example, a standard 3/8" nozzle tested using chill-cast iron grit and operating at 100psi performed for more than 1000 hours without appreciable wear.
International Syalons produce a wide range of standard shot / sand nozzle sizes as well as custom made fine sialon ceramic liners. Please contact us with your requirements.
For more information on the wear resistance applications of silicon nitride and sialon advanced ceramics please download our Industrial Wear Applications PDF