(2) Superplasticity and precision forging technology. Numerical simulation technology for stress and rheological field in superplastic forging of powder superalloy discs (including spray-formed disc blanks), preparation technology of super-plastic forging blanks for powdered superalloy discs and forging process, superplastic forging die and lubrication Technology, so as to fully grasp the superplastic forging technology of powder superalloy discs; explore the vacuum superplastic forging technology of powder superalloy turbine discs.
Developed titanium alloy structural parts, compressor discs and large blades for the demand for industrial production of aircraft and its engine typical parts, and the application of titanium alloy blade mechanical press constant load precision forging batch production technology, lubrication and measurement technology. The isothermal die forging technology develops a large-scale forging stepwise die forging technique with a projected area of ​​more than 1 m2.
(3) Special welding technology. Study on single-crystal, NiAl, TiAl, C/C composites, Ti-based composites, ceramic structural parts and vacuum brazing technology of dissimilar materials components and their brazing materials, and study the transient liquid phase diffusion welding of single crystal and NiAl material components (TLP diffusion) Welding technology and its intermediate layer alloys, to study the manufacturing technology of amorphous solder and intermediate layer alloy. Developed laser brazing technology for engine rotor friction welding and electron beam welding, compressor components and conduits, and electron beam welding technology for large components of aluminum-lithium alloys, in order to meet the needs of industrial production of aircraft and its engine parts. Large-scale complex structure radar antenna brazing technology and electron beam welding technology for titanium alloy large-sized structural parts and their corresponding supporting technologies.
(4) Heat treatment process basis and general technology. Study on precise control of cooling rate for solution treatment of powder and spray-formed superalloy superplastic forged discs, precise control technology of nitrogen potential and nitride layer depth for nitriding treatment of stainless steel and structural steel members, vacuum ion carburizing simulation control technology , computer expert system for heat treatment process. Develop high-pressure recovery heat treatment technology for engine hot-end parts, heat treatment technology for large-scale aluminum alloy assemblies, performance matching heat treatment technology for high-temperature alloy weldments, and aircraft and engine parts for the needs of industrial production of aircraft and its engine typical parts. Small deformation precision heat treatment technology of titanium alloy sheet metal assembly and its corresponding supporting technology.
(5) Surface engineering technology. Studying the new thermal insulation coating technology of continuous gradient structure, improving the heat insulation effect to 100-200 °C; researching the anti-corrosion coating process of aviation parts under maritime climatic conditions, circulating gas phase infiltration process of turbine blade inner cavity cooling channel, nickel High-temperature protective coating technology for aluminum intermetallic compounds, metal organic chemical vapor deposition (MOCVD) infrared transmission material thin film process, new radome high transmittance and anti-rain coating process. Developed an advanced aircraft full-scale corrosion control technology, aircraft inlet stealth coating coating technology and fluorine-containing skin coating under the climatic conditions in China for the needs of the industrial production of aircraft and its engine typical parts. And its coating technology, promote the application of Cd-Ti coating technology for landing gear parts and surface strain strengthening technology of various important bearing parts.
(6) Hot isostatic pressing and spray deposition forming techniques. Study on hot isostatic pressing composite forming technology of double alloy whole leaf disc structure (single crystal blade and powder disc), ultra-pure high-temperature alloy turbine disc spray forming technology and related technology, and aluminum-based composite material component injection forming technology for new machine research Make a good technical reserve. In view of the demand for industrial production of aircraft and its engine typical parts, research on the direct hot isostatic pressing batch process and reliability of an engine powder alloy turbine disk, and develop engineering application of injection molding technology on an engine turbine disk .
(7) Application of computer technology in thermal processing. Research on numerical simulation technology of casting process of titanium alloy and high-temperature alloy casting, computer reverse simulation technology of forging process, numerical simulation and prediction of forging and casting defect formation, application of computer neural network technology in brazing and diffusion welding technology, Computer expert system for heat treatment processes. The numerical simulation technology for the solidification process of directional solidified blade precision castings is promoted.
3 Conclusion
Aviation thermal processing technology is a key technology that significantly improves the performance of aerospace products, significantly reduces the weight of aviation products, reduces manufacturing costs and improves the service life and reliability of aviation products. It is along the direction of quality, efficiency, precision, large scale and pollution-free. development of. In order to adapt to the development of China's aviation industry in the new century, in addition to strengthening the pre-research of key technologies in various disciplines, we must also pay attention to the supporting development of batch production technology to improve the overall level of manufacturing technology. Suggestions for this:
(1) Concentrate on the high-efficiency cooling of single-crystal blade precision casting technology and powder superalloy turbine disk superplastic forging technology and other advanced fighters and advanced civil aircraft and its key engine urgently needed key thermal processing technology to ensure the smooth development of new machines .
(2) Develop and apply titanium for high-efficiency, precise and low-cost advanced thermal processing technologies such as titanium alloy blade precision forging batch production technology and titanium alloy integral precision casting technology for research and development of aviation products. Alloy large-scale structural parts and compressor die isothermal die forging technology and single-crystal combined blade batch production technology to produce high-quality advanced thermal processing technology to improve the comprehensive technical level, product quality and economic benefits of the aviation industry.
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