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Thermal Spraying Technology application field(四)

Author: langfeng Time: 2017-08-12

Changsha Langfeng Metallic Material Co.,Ltd.

Thermal Spraying Technology application field(四)

5. restore the size - this type of coating is mainly used for repairing or machined parts due to wear ultra-poor. The choice of coating material depends on the requirements of the part. 
6. gap control coatings - such coatings provide tight seal gap, significantly improve equipment performance and operational efficiency. Contact with the mating parts, coating priority controlled wear. The Typical coating is nickel / graphite mixture polyester aluminum, aluminum / graphite coating. 
Select the main basis for thermal spraying (before selecting the thermal spraying,it is necessary to clarify the above several aspects)
(1) Corrosion of parts. Part in what medium; parts operating temperature; force parts of the case and the load size;Failure parts.
(2)Parts of the physical and chemical condition.Parts of the material, composition,size and shape;whether have used the other surface treatment method; thermal expansion coefficient; wear and the location and size;
(3) To the technical requirement of the coating,such as the thickness,hardness and bonding strength of coating;Size and deformation limit and precision grade; Machining performance and the surface roughness, etc.;
(4) Economic rationality, using thermal spray parts of the new pre-failure protection or repair parts, in addition to technical necessity, but mostly for economic reasons. After calculation, the average cost of spraying only about 20% of the price of the parts, of course, also have a greater proportion, or even much higher than the price of the parts, but the sprayed part of its service life than the non-coating to improve at least several times or more,  Some large parts or long manufacturing cycle parts, once damaged, it is difficult to purchase in time, so using the thermal spray to make up for losses caused by the shutdown,it is cost-effective.
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