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       Thermal Spraying Technology for Inner Hole is the most advanced processing technology of engine bore nowadays. The inner hole plasma spraying technology USES atmospheric plasma spraying technology to coat powder materials on the inner surface of cylinder operation. Different spraying powders are selected to achieve the goals of low friction, low fuel consumption, high wear resistance and high corrosion resistance.
It is a kind of inner hole spraying process, belong to Europe's top technology -- no cylinder liner, it already won the maturity of luxury car brands in foreign countries, such as the bugatti, porsche, aston Martin, Volkswagen, audi, such as automobile engines, scania trucks and ROTAX aircraft engine and diesel engine, such as BMW, yamaha motorcycle engine.
Another important application of this technology is the remanufacturing of cylinder liners for high-end second-hand engines and high-end commercial vehicles. The cylinder hole coating is honed to form a porous surface with an open and dispersed surface. It is these gently rounded holes that reduce the exposure of fuel to combustion Chambers and piston rings; At the same time, the tangential force of oil scraping ring is reduced, so that the piston ring can enter into the fluid dynamics state more smoothly, significantly reducing friction resistance and wear, thus further reducing the possibility of oil consumption and gas channeling.
Special porous surface oil storage structures are not worn away during the honing process as the reticulated structures in the flat-top honing process. With wear and tear, when the coating thickness gradually decreases, new lubrication holes will appear on the coating surface, ensuring the sustainability of the performance.
In addition, the coating thickness after honing is between 120 and 150 microns. Compared with the cast iron cylinder liner, the thin-wall coating greatly improves the heat transfer between the cylinder bore and cylinder block.

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