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.
Several techniques which include: thermal and plasma sprays are employed to get the opted coating texture which primarily depends on the application procedures used. A further coating operation is usually used which is aimed for secondary and tertiary fusibility purposes to produce a stronger metallic luster. It thus portrays appealing results and facilitates consistency in application.
The process of application is usually initiated by a jet of combusted high-pressure fuel gas together with oxygen gas. It is then pressurized more in pressure chambers where it jets out via a small diameter-nozzle at an accelerating velocity in a long gas barrel. It is thus mixed with carbide powder at nozzle point where the two attains a supersonic speed.
The speeding gas-powder mixture is then imparted on the metal surface where its speed yields to zero, but the particles normally absorb it by cohesively clinging together and adhesive attaching permanently to the metal surface. This leads to the formation of a very turgid, rigid coating. The coating shiny and smooth due to its low porosity characteristics. Also, the resulting coating is strongly bonded by giant ionic bonds which contribute to its durability.
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.
The binder material and chemical technique selected determines the resulting coating characteristics and its ability to curb irritating processes like corrosion, erosion, and abrasion in drastic wear conditions. Through the above technique, it renders it applicable in various industries processes like in paper production where the desired paper output is solely determined by the nature of the rolling surface.
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.
The introduction of these coatings has accrued tantamount benefits in the engineering community. It has led to operational and maintenance cost reduction in the cases of entirely solid plants that involved combustion chambers in their production. Therefore, it has led to obsolesce of other coating methods like hard chromium coatings which are characterized by undesirable attributes.
Several techniques which include: thermal and plasma sprays are employed to get the opted coating texture which primarily depends on the application procedures used. A further coating operation is usually used which is aimed for secondary and tertiary fusibility purposes to produce a stronger metallic luster. It thus portrays appealing results and facilitates consistency in application.
The process of application is usually initiated by a jet of combusted high-pressure fuel gas together with oxygen gas. It is then pressurized more in pressure chambers where it jets out via a small diameter-nozzle at an accelerating velocity in a long gas barrel. It is thus mixed with carbide powder at nozzle point where the two attains a supersonic speed.
The speeding gas-powder mixture is then imparted on the metal surface where its speed yields to zero, but the particles normally absorb it by cohesively clinging together and adhesive attaching permanently to the metal surface. This leads to the formation of a very turgid, rigid coating. The coating shiny and smooth due to its low porosity characteristics. Also, the resulting coating is strongly bonded by giant ionic bonds which contribute to its durability.
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.
The binder material and chemical technique selected determines the resulting coating characteristics and its ability to curb irritating processes like corrosion, erosion, and abrasion in drastic wear conditions. Through the above technique, it renders it applicable in various industries processes like in paper production where the desired paper output is solely determined by the nature of the rolling surface.
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.
The introduction of these coatings has accrued tantamount benefits in the engineering community. It has led to operational and maintenance cost reduction in the cases of entirely solid plants that involved combustion chambers in their production. Therefore, it has led to obsolesce of other coating methods like hard chromium coatings which are characterized by undesirable attributes.
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