Preparation method of resin-based composite material flow guide blade erosion-resistant coating

Abstract

The invention belongs to the field of resin-based composite material protective coatings, and particularly relates to a preparation method of a resin-based composite material flow guide blade erosion-resistant coating. According to the preparation method, structures of a resin / metal primer layer and a metal intermediate layer are added in a traditional anti-scouring coating, so that the problem of excessive interface stress caused by mismatching of thermal expansion coefficients of the coating is effectively solved, the coating can be continuously used 3000 times in a thermal cycle test of 300 DEG C without failure, and the method is suitable for preparing the anti-scouring coatings of resin-based composite material flow guide blades and stator blades. The resin base / metal primer layer structure is prepared through a room-temperature gas spraying and curing treatment process, so that the interface compatibility of the coating and a resin-base body is improved, and the interface bonding strength is improved; on the other hand, the pretreatment of spraying to blade bodies is not needed, so that the damage of the pretreatment to blade body matrix resin and fibers is reduced. The metal intermediate layer and the anti-scouring surface layer are prepared on the surface of the primer layer by adopting a thermal spraying process, and the method has the advantages of strong controllability in the process, low cost, high spraying efficiency and good coating performance.

Description

technical field [0001] The invention belongs to the field of aero-engines, and in particular relates to a method for preparing an anti-scouring coating of a guide vane made of resin-based composite material. Background technique [0002] For advanced aero-engines, the use of resin-based composite materials instead of metal materials to make guide vanes can achieve significant weight reduction. In actual use, the guide vane mainly plays the role of rectification, flow adjustment and support. During the working process, the guide vanes not only have to withstand high temperatures above 150°C for a long time, but also undergo high-speed erosion of dust particles entrained by high-speed airflow during the engine start / stop process, which can easily cause high-temperature erosion and wear failure of components. [0003] Compared with metal materials, resin-based composite materials have lower hardness and poorer erosion and wear resistance, which have become the main factors lim...

AI Technical Summary

Problems solved by technology

For the application of guide vane components, this technology has the following problems: (1) The thickness of the traditional metal edging reaches (0.4-0.5) mm, and it is connected with the composite material through an adhesive, and the overall weight gain is obvious; (2) The metal edging The processing technology is complicated and costly, and the shape of the guide vane is complex and diverse, which further limits the popularization and application of this method; (3) With the continuous development of engine technology, the working temperature of the guide vane continues to increase, due to the metal wrapping and The thermal expansion coefficient of the resin-based composite material matrix is ​​quite different. During the temperature change process, the metal wrapping and composite material blades are prone to debonding and cracking, which will affect the safe operation of the engine.

This patent is composed of Cu, Ni or copper-nickel mixture, which does not fundamentally change the interface stress between the protective layer and the substrate caused by the difference in thermal expansion coefficient during the temperature alternation process. Insufficient applicability of personal protection requirements