In recent years, along with the domestic aviation industry's rapid development and progress, China's aviation industry has invested heavily, and carried out a large number of new product development and new technology research and development. Aero-engine product quality and efficiency of the substantial increase in the blade components is the core, so the key manufacturing technology of the aero-engine blade has always been the focus of the majority of scientific research workers on the project, the blade components of the final product is directly related to the performance of the aero-engine's main performance indicators. Therefore, vigorously invest in scientific research, significantly improve the aero-engine blade processing and manufacturing technology level, and then significantly improve the thrust and reliability of the aero-engine, will significantly promote China's aviation industry to achieve leapfrog development and progress.
Aero-engine blade for a long time in the high temperature, high pressure and high speed "three high" state operation, because a variety of random load and high temperature gas action and erosion, resulting in the degree of wear resistance, anti-fatigue ability to significantly reduce, and even cracking and other issues. Early blade parts of the remanufacturing technology has not been effectively promoted, resulting in general damage to the blade can not be effectively repaired, can only be scrapped, resulting in a relatively serious waste phenomenon.
For the aero-engine blade parts remanufacturing technology, can be divided into additive remanufacturing technology and material reduction type remanufacturing technology of these 2 categories.
(1) laser cladding: the application of high-energy laser beams for irradiation, so that the cladding material and the surface of the substrate material thin layer of the melting reaction, and then quickly solidified into a class of fusion cladding processing methods, can be achieved by repairing the damaged parts, and has to enhance the parts surface wear and corrosion resistance index role.
(2) Welding: If the standard is based on whether or not the base material melts during the blade reconstruction process, the blade welding and remanufacturing method can be divided into solid phase welding (the base material remains in the original solid state without change) and fusion welding (the base material melts). Solid-phase welding: the appropriate means are used to clean up the excess material at the cracks, after which the solder is set at the cracks, and the high temperature conditions are applied to make the solder melt and fill up the cracks, and make a tight connection with the base material. Welding: the main representative of the plasma arc welding, plasma arc welding method has the advantages of relatively concentrated energy density, strong penetration capacity and the quality of the welding process is relatively stable and so on, and the workload of the post-welding mechanical processing is relatively small, the work efficiency is relatively high.
Water-based cleaning method
The use of water-based type of cleaning agent, with detergent and rust additives and other additives, the main mechanism of this method is to apply the adsorption effect of surfactants to reduce the value of the surface tension between the dirt and the aqueous solution, combined with the mechanical type of stirring, ultrasonic and other methods of auxiliary effect to remove the surface of the dirt, carbon and so on.
