Tungsten carbide is a chemical compound consisting of various metallic and non-metallic elements which pose cohesive and adhesive properties in their chemical structures. They exhibit the above characteristics when treated under controlled chemical conditions. Therefore, the compound is applied as a coating powder due to their distinct binding properties to form an anti-wear coating to galling, abrasion and fretting. The tungsten carbide coatings are primarily done by thermal sprays to achieve a strong concrete coating.
The coating can as well be applied by other modest ways of application to attain a higher texture coating which normally depends on the application procedures. When plasma sprays are used, it triggers the use of flame spray for secondary fusing purposes and to provide a metallic bonded coating. The essential aspect of the use of tungsten carbide as the coating powder is to ensure consistency in application and a presentable metallic surface output.
The critical process ordains by combusting fuel gas and mixing it with oxygen gas which is then subjected to high pressure to generate a high velocity through increasing the kinetic energy. The mixture of gases is then strictly injected through a narrowed nozzle. At the nozzle point, it is mixed with the tungsten carbide feedstock powder where it jets out at an accelerating velocity.
The speeding mixture of the powder and the gases impart terrific amounts of the motion energy, including the kinetic energy on the on the injected powder particles. This makes the energetic particles to strike the surface making the velocity to yield zero and also the adoption of the kinetic energy which makes them cling instantly to the workpiece in question. This results in the formation of a very dense, cohesive and adhesive coating. Therefore, low porosity and a high bond strength coating are realized.
To produce the specialized coating, the tungsten carbide is mixed with a binding material which results in a very hard component with a higher melting point. The coating properties such wear resistance, hardness, and strength primarily are determined by the grain size and the volume proportion of tungsten material used. Therefore, the technology of controlled grain size and volume of coating chemical used determines the specific coating properties be achieved.
Various considerations are put in place when selecting different binder materials and chemistry; these include; corrosion, erosion, and abrasion. Thus, the coating is commonly used for extreme wear conditions. It is thus applied in coating rolling surfaces in paper production processes. The quality and thickness of the paper produced can be ascertained by the parameters applied in thermal spraying the surfaces to adapt the desired paper characteristic.
The coating technology is also applicable to power generation points, majorly coal-oriented power plants. It plays a key role in maintaining the surfaces from adverse conditions like corrosion. Similarly, the coating is also widely used in steel and metal production from the fabrication process to the finishing process. Collectively, it serves as cost reduction technique, and thus it efficiently fosters productivity.
Lastly, the adoption of the tungsten carbide coating technology has revealed endless benefits. This is because it is the most durable and efficient mode of coating in that it serves the metal substrate extremely longer time duration. Still, it overpowers the former conventional chrome plating due to its faster deposition rate and does not undergo lengthy processes of embrittlement-treatment.
The coating can as well be applied by other modest ways of application to attain a higher texture coating which normally depends on the application procedures. When plasma sprays are used, it triggers the use of flame spray for secondary fusing purposes and to provide a metallic bonded coating. The essential aspect of the use of tungsten carbide as the coating powder is to ensure consistency in application and a presentable metallic surface output.
The critical process ordains by combusting fuel gas and mixing it with oxygen gas which is then subjected to high pressure to generate a high velocity through increasing the kinetic energy. The mixture of gases is then strictly injected through a narrowed nozzle. At the nozzle point, it is mixed with the tungsten carbide feedstock powder where it jets out at an accelerating velocity.
The speeding mixture of the powder and the gases impart terrific amounts of the motion energy, including the kinetic energy on the on the injected powder particles. This makes the energetic particles to strike the surface making the velocity to yield zero and also the adoption of the kinetic energy which makes them cling instantly to the workpiece in question. This results in the formation of a very dense, cohesive and adhesive coating. Therefore, low porosity and a high bond strength coating are realized.
To produce the specialized coating, the tungsten carbide is mixed with a binding material which results in a very hard component with a higher melting point. The coating properties such wear resistance, hardness, and strength primarily are determined by the grain size and the volume proportion of tungsten material used. Therefore, the technology of controlled grain size and volume of coating chemical used determines the specific coating properties be achieved.
Various considerations are put in place when selecting different binder materials and chemistry; these include; corrosion, erosion, and abrasion. Thus, the coating is commonly used for extreme wear conditions. It is thus applied in coating rolling surfaces in paper production processes. The quality and thickness of the paper produced can be ascertained by the parameters applied in thermal spraying the surfaces to adapt the desired paper characteristic.
The coating technology is also applicable to power generation points, majorly coal-oriented power plants. It plays a key role in maintaining the surfaces from adverse conditions like corrosion. Similarly, the coating is also widely used in steel and metal production from the fabrication process to the finishing process. Collectively, it serves as cost reduction technique, and thus it efficiently fosters productivity.
Lastly, the adoption of the tungsten carbide coating technology has revealed endless benefits. This is because it is the most durable and efficient mode of coating in that it serves the metal substrate extremely longer time duration. Still, it overpowers the former conventional chrome plating due to its faster deposition rate and does not undergo lengthy processes of embrittlement-treatment.
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