Method for spraying polyphenyl ester aluminum bronze fretting-wear-resistant coating

Abstract

The invention relates to a method for spraying a polyphenyl ester aluminum bronze fretting-wear-resistant coating. The content of Al2O3 in the coating and the content of polyphenyl ester in the coating can be effectively adjusted by having control over the plasma spraying power and the heated process of spraying powder in flight; meanwhile, heat can be dispersed in the spraying process through a compressed air cooling system, so that local overheating is prevented. According to spraying carried out through the method for spraying the polyphenyl ester aluminum bronze fretting-wear-resistant coating, it is ensured that polyester-containing porosity of the polyphenyl ester aluminum bronze fretting-wear-resistant coating can be controlled to range from 15% to 35%, the content of oxide can be no larger than 4%, and the three-prevention requirements that the mould experiment can be of a zero level, the salt spray resistance time through a salt spray test reaches 96h, the damp and hot resistance time of a damp and hot test reaches 10d, and the mechanical property of the coating can be more than 19MPa are met.

Description

technical field [0001] The invention relates to a spraying method, in particular to a method for spraying a polyphenylester aluminum bronze anti-fretting wear coating. Background technique [0002] The working conditions of aero-engine parts are harsh, and their parts are prone to wear and tear due to the perennial vibration. Among them, fretting wear is a more prominent type of wear damage in aero-engines, which occurs on two metal surfaces with a certain positive pressure and very small relative motion. At present, the existing aviation products generally use electroless nickel plating or electroplating nickel technology to improve the wear resistance of parts. Although the nickel layer is wear-resistant, due to its high hardness and strong wear resistance, it is easy to wear the matching parts of the electroless nickel layer. . Polyphenylester aluminum bronze coating belongs to the metal-based solid anti-friction composite material. % polyphenylene plus 5% aluminum bro...

AI Technical Summary

Problems solved by technology

In aviation products, the requirements for the anti-fretting wear coating of polyphenylene aluminum bronze are relatively high, including controlling the polyester-containing porosity of the polyphenylene aluminum bronze coating between 15% and 35%. The range is ≤4%. At the same time, the level of "three defenses" must reach the level 0 of the mold test, the resistance of the salt spray test is 96h, the resistance of the damp heat test is 10d, and its mechanical properties are above 19MPa. At present, the existing domestic spraying methods cannot meet the above requirements