Steel piston composite hear insulation coating and spraying technology thereof
A technology of thermal insulation coating and steel piston, which is applied in the direction of metal material coating process, coating, and surface coating liquid device, etc., which can solve the fatigue failure of thermal load distribution piston material, reduce the thermal insulation effect of steel piston, and prevent high temperature Insufficient corrosion performance and other problems, to achieve the effect of improving high temperature oxidation resistance, reasonable design method, and improving service life
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[0026] A Ф112mm bore engine steel piston top surface and combustion chamber surface are evenly sprayed with a 0.35mm thick composite thermal insulation coating to reduce heat conduction and improve engine thermal efficiency. After spraying, the steel piston top surface and combustion chamber surface contours remain unchanged.
[0027] The composite heat-insulating coating is a solid-state synthetic coating, including a high-temperature anti-oxidation layer, a low thermal conductivity heat-insulating layer, and a high-temperature anti-corrosion layer, wherein the high-temperature anti-oxidation layer is a CrN ceramic coating with a thickness of 0.0035mm, and the heat-insulating coating The layer is GN-302 heat-insulating ceramic solid polymer coating doped with zirconia nano-powder with a thickness of 0.25mm, and the high-temperature anti-corrosion layer is GN-201 high-temperature-resistant and anti-corrosion nano-ceramic solid polymer coating with a thickness of 0.0965mm .
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