Introduction of Tungsten Carbide for Thermal Spraying and Several Typical Applications

       

Introduction of Tungsten Carbide for Thermal Spraying and Several Typical Applications

With the tightening of the national environmental protection policy and the chromium electroplating in the face of user equipment performance and long-life requirements, the supersonic flame spraying tungsten carbide is gradually being accepted by many industrial enterprises as a standard process for wear-resistant and corrosion-resistant applications.

 

Usually for pure wear-resistant applications, such as steel process rolls, wear-resistant guide rolls, etc., you can choose cobalt/tungsten carbide, such as Wc 12Co or Wc17Co; when faced with corrosion or a combination of wear and corrosion, cobalt-chromium/carbonized Tungsten (such as Wc 10Co4Cr) has better performance.

 

For example, the corrugating roller of a corrugating machine, the rollers are mutually squeezed and driven by tooth-shape matching. With the long-term squeezing and wear between the roller body and the pulp, the tooth shape changes and the corrugating roller becomes invalid. At this time, the supersonic flame process (HVOF or HVAF) spraying Wc 12Co or Wc 10Co4Cr can greatly improve the surface wear resistance of the corrugated roller.

 

In addition, because the corrugated roller has a dense tooth profile and needs to be polished after spraying, the use of tungsten carbide fine powder (such as 5-25 microns) can reduce the roughness of the sprayed state, thereby saving the finishing time after spraying and reducing the polishing cost.

 

In the oil and gas screw drilling tools, due to the erosion of sediment and even the corrosion of saturated salt water, supersonic flame spraying Wc10Co4Cr is becoming the first choice of many users in Europe, America and even China.