Aviation Material Thermal Processing Technology

According to the development needs of China’s aviation industry in the new century and the development trend of thermal processing technology, the fourth generation fighter aircraft and advanced civil aircraft and their supporting high thrust-to-weight ratio engines and airborne equipment are required for thermal processing technology, and subject development It is recommended to focus on the development of the following aviation thermal processing technologies at the beginning of the next century:
(1) Advanced casting technology. Research on complex casting blade precision casting technology, high temperature resistant core and shell materials and their precise preparation technology and coating technology, supporting electron beam physical vapor deposition technology (EB-PVD), etc., to explore efficient cooling at operating temperatures of 2000-2100K Manufacturing technology of single crystal blades; research on precision casting technology of titanium alloy casing-blade integral structural parts, precision casting technology of high temperature alloy casing, aluminum alloy lips and accessory shells, large thin-wall high-strength wax type He shell manufacturing technology and coating technology, numerical simulation technology of casting process, etc., in order to fully grasp the precision casting technology of large thin-walled structural parts. Aiming at the needs of the industrial production of typical parts of aircrafts and engines in research and in progress, the titanium alloy integral casing precision casting technology and its corresponding supporting technology were promoted and applied, and the monocrystalline composite blade batch production technology and its corresponding supporting technology were developed.
(2) Superplasticity and precision forging technology. Research on the numerical simulation technology of stress and rheological field during superplastic forging of powder superalloy discs (including injection molded disc blanks), preparation technology and forging process of superplastic forging blanks of powder superalloy discs, superplastic forging die and lubrication Technology, so as to fully grasp the superplastic forging technology of powder superalloy disks; explore the vacuum superplastic forging technology of powder superalloy turbine disks.
In response to the needs of the industrial production of typical parts of aircraft and engines in research and in progress, promote the application of titanium alloy blade mechanical press constant load precision forging batch production technology, lubrication and measurement technology, develop titanium alloy structural parts, compressor disks and large blades The isothermal die forging technology develops the graded die forging technology for large forgings with a projection area greater than 1m2.
(3) Special welding technology. Research on single crystal, NiAl, TiAl, C / C composite materials, Ti-based composite materials, ceramic structural parts and dissimilar materials components vacuum brazing technology and brazing materials, research on single crystal and NiAl material components transition liquid phase diffusion welding (TLP diffusion Welding) technology and its intermediate layer alloy, study the manufacturing technology of amorphous solder and intermediate layer alloy. In response to the needs of industrial production of typical parts of aircraft and engines in research and in progress, we developed friction welding and electron beam welding of engine rotors, laser brazing technology for compressor components and catheters, electron beam welding technology of large aluminum-lithium alloy components, Brazing technology of large complex structure radar antenna and electron beam welding technology of large titanium alloy structural parts and their corresponding supporting technologies.
(4) Heat treatment process foundation and general technology. Research the precise control technology of the cooling rate of the solution treatment of superplastic forging discs of powder and spray forming superalloys, the precise control technology of the nitrogen potential and the depth of the nitride layer of the nitriding treatment of stainless steel and structural steel components, and the simulation control technology of vacuum ion carburization 1. Computer expert system for heat treatment process. Aiming at the needs of the industrial production of typical parts of aircraft and engines under development and in progress, we developed high-temperature recovery heat treatment technology for engine hot-end parts, heat treatment technology for large aluminum alloy assemblies, high-temperature alloy weldment performance matching heat treatment technology, aircraft and engine parts, Titanium alloy sheet metal assembly small deformation precision heat treatment technology and its corresponding supporting technology.
(5) Surface engineering technology. Research on new thermal insulation coating technology with continuous gradient structure to increase the thermal insulation effect to 100 ~ 200 ℃; research on anti-corrosion coating technology for aerospace parts in marine climate conditions, circulating gas infiltration technology for cooling channels of turbine blade inner cavity, nickel High-temperature protective coating technology for aluminum intermetallic compound components, metal organic chemical vapor deposition (M ℃ VD) infrared transmission material film process, and new radome high wave transmittance anti-rain erosion coating process. In response to the needs of the research and production of aircraft and engine typical parts in industrial production, we developed an advanced aircraft whole-machine corrosion control technology, aircraft air intake stealth coating coating technology and fluorine-containing skin coating under Chinese climate conditions And its coating technology, popularize and apply the Cd-Ti coating technology of landing gear parts and the surface strain strengthening technology of various important load-bearing parts.
(6) Hot isostatic pressing and spray deposition forming technology. Research on dual-alloy monolithic disc structure (single crystal blade and powder disc) hot isostatic pressing composite forming technology, ultra-pure high-temperature alloy turbine disc spray forming technology and related technologies, aluminum matrix composite material spray forming technology, for the new machine research Make a good technical reserve. Aiming at the needs of industrial production of typical parts of aircrafts and engines in research and in progress, the direct hot isostatic pressing batch production process and reliability of an engine powder alloy turbine disk were studied, and the engineering application of injection molding technology on an engine turbine disk was developed. .
(7) The application of computer technology in the process of thermal processing. Research on the numerical simulation technology of titanium alloy and superalloy casting casting process, computer reverse simulation technology of forging process, numerical simulation and prediction of forging and casting defect formation, the application of computer neural network technology in brazing and diffusion welding technology, Computer expert system for heat treatment process. Popularize and apply the numerical simulation technology of the solidification process of directional solidification blade precision castings.