The large-area coating of aero-engines has a key impact on the entire equipment

       In aero-engines, more than 75% of the components need to be painted, and different components have different requirements for coating performance, and their performance is related to coating materials, coating technology, and coating technology. Thermal spraying materials are one of the core technologies. The development of thermal spraying materials can provide better safety for aero-engines. Therefore, thermal spraying materials have broad development space.

Thermal spray technology is a method of using a heat source to heat the spray material to melt or semi-melt, and then spray and deposit a coating on the pretreated substrate surface at a certain speed.



Thermal spraying equipment has the advantages of diverse materials, light equipment, flexible process, few operation steps, quick maintenance, strong adaptability, controllable coating thickness, etc. It is suitable for various substrates. The surface of almost all solid materials can be made into protective coatings and functional coatings, and has been widely used in petrochemical, aerospace, transportation, paper, machinery and other industries.

Application of Thermal Injection Technology in Aeroengine

The following briefly describes the application of several thermal spray materials in aero-engines

Abrasion Resistant Coatings.

In the field of mechanical engineering, a common failure form is the wear of mechanical parts caused by long-term operation. The way to reduce this mechanical failure is to replace parts in time or improve the wear resistance of parts, but frequent replacement of parts will inevitably lead to more waste of manpower and financial resources. The emergence of wear-resistant materials greatly meets people's needs and reduces the wear of materials on equipment parts. For aero-engine parts, the wear-resistant coating materials must meet the requirements of high melting point, high hardness and impact wear resistance, and the wear-resistant coatings prepared by thermal spraying process have excellent wear resistance.



cover seal material

For aero-engines, the gap between the rotors will also have a great impact on its working efficiency. Smaller voids can not only greatly improve the efficiency of aero-engines, reduce fuel consumption, but also effectively improve the safety performance of engines, so a large number of sealing coating materials are used on aero-engines. In order to meet the needs of current aero-engine operation, it is necessary to use sealing coating materials with high strength and aerodynamic impact resistance, generally metal and non-metal composite materials. As of now, there are more than 20 kinds of feasible spray materials. Conduct research on thermal spraying materials such as ceramics and nanometers.



High temperature resistant coating material.

Aircraft engines generate a lot of heat during operation. In order to prevent engine components from being oxidized at high temperatures, it is necessary to spray high temperature protective materials on their surfaces. According to actual needs, the applied high-temperature protective coating has basic high temperature resistance and anti-oxidation properties, and the substances that require this coating material will not decompose at high temperatures and will not react with the coated machine surface.



Size repair coating material.

When the aircraft engine is running, in order to effectively reduce the possibility of wear or other damage, coating the surface of the parts with corresponding materials cannot directly avoid the occurrence of damage. Therefore, after a long-term operation of an aero-engine, parts wear or other damage will inevitably occur, thereby changing the size of the original parts and affecting the normal operation of the engine. Therefore, the study of repair coating materials is also very important. In addition, according to the actual repair technology, it is necessary to adopt the corresponding scientific and reasonable coating technology and coating technology.