PVD coating on surface of airspeed head and preparing method of PVD coating

Abstract

The invention relates to a PVD coating on the surface of an airspeed head and a preparing method of the PVD coating, and belongs to the technical field of material surface treatment. The non-balance magnetron sputtering physical vapor deposition method is adopted, equipment is provided with a single chromium metal target, a single layer of hard chromium is deposited on the surface of the airspeed head subjected to chromium removing and polishing, and the thickness of the PVD coating is about 2 microns-6 microns. By means of the preparing method, the bright airspeed head surface coating can be obtained, meanwhile, precise elements in the airspeed head cannot be damaged, and the using performance of the airspeed head can be guaranteed. In addition, the binding force between the PVD chromium coating and a base body of the airspeed head is good, and the abrasion resistance and corrosion resistance are good. No pollution is caused to the environment, and no harm is done to the human body.

Description

technical field [0001] The invention relates to the technical field of pitot tube surface treatment, in particular to a PVD coating on the surface of a pitot tube and a preparation method thereof. Background technique [0002] In the 21st century, with the progress of society, under the requirements of energy saving and material saving, and under the policy of sustainable development, the remanufacturing of various parts has been widely concerned and developed. Replace new parts with remanufactured parts to achieve energy saving, material saving and environmental protection. [0003] The pitot tube is one of the important parts of the aircraft. It can provide basic parameters such as the altitude and speed of the flight through the change of the surrounding air pressure during flight. It is an indispensable part of the aircraft. During the flight, due to air corrosion, surface scratches, etc., pitting and scratches will appear on the surface of the pitot tube, which not onl...

AI Technical Summary

Problems solved by technology

Since there are many small static pressure holes on the surface of the pitot tube, and there are devices that need to be insulated inside the pitot tube, various acidic and alkaline solutions may Enter the pitot tube through the small hole, destroy the insulation, and cause the pitot tube to lose its performance and be scrapped; while the conventional insulation method can block the static pressure hole so that the plating solution does not enter the pitot tube, but due to the electroplating The dispersing ability is poor, which will lead to the inability to deposit Cr coating around the blocked small hole, making the surface coating of pitot tube incomplete, which does not meet the requirements of appearance

[0005] It can be seen that although electroplating is a mature repair technology, because its theory is based on electrochemistry, it not only cannot repair some special parts (such as pitot tubes), but may also repair them. Damage to other properties of the part and cause additional losses

For the surface repair of such parts, there is still a lack of effective means

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