The preparation method of 550℃ ~ 650℃ high-temperature titanium alloy foil is as follows: (1) The high-temperature titanium alloy ingot is heated at 1100℃ ~ 1200℃ and then forged to obtain the blank; (2) Rolling after heating at 950℃ ~ 1000℃; (3) After heat treatment at 50℃ ~ 70℃ above the β phase change point, the slab is obtained by water quenching and cooling to room temperature; (4) Rolling after heating at 950℃ ~ 1000℃; (5) The obtained billet will be welded together to obtain cladding rolling; (6) The rolling package is heated at 950 ° C ~ 1000 ° C and then rolled; (7) Disassemble the rolling package and weld the billet for the second time to obtain the rolling package; (8) The rolled package is heated at 900 ° C ~ 950 ° C and rolled perpendicular to the last rolling direction; (9) After annealing, creep calibration, alkali pickling and sanding, a sheet with a thickness of 0.6mm is obtained; (10) The sheet is cut and cold rolled for 7 to 25 times to obtain rolled foil with thickness of 0.08mm to 0.2mm; (11) Vacuum annealing heat treatment to obtain the finished foil with a thickness of 0.08mm ~ 0.2mm.
High temperature titanium alloy is mainly used in high temperature structural components of aircraft engines and aerospace hypersonic vehicles. At present, China's independent research and development of high temperature titanium alloys are TA32, TA33 and Ti65 titanium alloys, long-term use temperature of 550℃, 600℃ and 650℃, the above high temperature titanium alloy plates have been applied to aircraft engines and supersonic aircraft barrel, body, wing and other thermal structural components.
The high temperature titanium alloy honeycomb structure has irreplaceable advantages in the wing honeycomb panel and other components of ultra-high sound velocity aircraft due to its characteristics of light weight, high strength and high temperature resistance. The existing titanium alloy foil patent mainly focuses on the preparation process of structural titanium alloys such as TC4, TB8, TB5 and other alloy foil (see authorization announcement number CN103464461B, CN102941228B), the preparation method is relatively simple, generally from the market to purchase finished plates as blanks, and then use cold rolling or hot rolling to get the foil.
