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Thermal spray process and the perfect combination of ceramic coating(一)

Author: langfeng Time: 2017-10-25

Changsha Langfeng Metallic Material Co.,Ltd.

Thermal spray process and the perfect combination of ceramic coating(一)

Thermal spraying technology is an important part of surface engineering in the field of materials science. It is a kind of surface strengthening and surface modification technology. By spraying a layer of coating on the surface of metal substrate, the metal has wear resistance, corrosion resistance and high temperature resistance Oxidation, electrical insulation, insulation, radiation, wear and sealing performance. Thermal spraying technology is mainly used for high temperature, wear, corrosion and other parts of the pre-protection, functional coating preparation and failure of the repair parts. In the case of Thermal spraying process is widely used in flame spraying, arc spraying, plasma spraying, explosive spraying and supersonic spraying technology. Flame spray is achieved through the flame gun, the gun through the valve were introduced acetylene, oxygen or compressed air, acetylene and oxygen mixed at the nozzle outlet after the combustion flame, the introduction of powder or rod-like coating in the flame was heated and melted , Under the action of the flame in the formation of small droplets of droplets are sprayed to the substrate surface to form a coating. The two linear coating materials used in the arc spraying are automatically introduced by the wire feed wheel. When a large current is passed between the two linear materials, the arc is generated and the linear material rapidly melts under the high temperature of the arc and is compressed by compression The air acts into small droplets that are sprayed onto the substrate surface to form a coating. Plasma spray for powder coating materials, plasma guns will be converted into heat energy, resulting in high temperature and high speed plasma flame flow, the plasma flame temperature can be up to 50000 ℃, can melt all the spray material. Explosive spraying is the use of combustible gas and oxygen mixture ignition energy provided by the explosion, the powder spray to the substrate surface to form a coating. 
The two linear coating materials used in the arc spraying are automatically introduced by the wire feed wheel. When a large current is passed between the two linear materials, the arc is generated and the linear material rapidly melts under the high temperature of the arc and is compressed by compression The air acts into small droplets that are sprayed onto the substrate surface to form a coating. Plasma spray for powder coating materials, plasma guns will be converted into heat energy, resulting in high temperature and high speed plasma flame flow, the plasma flame temperature can be up to 50000 ℃, can melt all the spray material. Explosive spraying is the use of combustible gas and oxygen mixture ignition energy provided by the explosion, the powder spray to the substrate surface to form a coating. The supersonic flame spraying method has improved the bonding strength, hardness, compactness and abrasion resistance of the coating because of its high particle impact velocity.
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