Titanium has been widely used in the manufacture of large-scale civil aircraft, landing gear and some key parts of the wheel are forged with titanium alloy, there are also a small number of parts forged with aluminum alloy. In the C919 large aircraft, the net mass of titanium alloy parts and components accounted for about 10% of the total net mass of the aircraft, the largest amount of titanium in the civil aircraft made in China, which parts for titanium: the nose, with the Ti-6Al-4VEVI forgings; hanging, with the Ti-6Al-4V alloy forging, plate and titanium alloy 55531 forgings; tail wing with the Ti-6Al-4V alloy forgings; outer wings with Ti-6Al-4V alloy forgings and plates; center wing with Ti-6Al-4V ELl alloy forgings; landing gear system with Ti-6Al-4V alloy forgings.
Ti-6Al-4V (TC4, GB/T3620), a medium-strength (>900MPa) α + β-type alloy, was developed by the U.S. Watertown (watertown, also known as Watertown) Arsenal in 1954, is widely used in aerospace, and its semi-finished products accounted for 55%-65% of the world's total production of titanium, which is used for the production of a variety of aviation spacecraft Forging and plate, because it has excellent comprehensive performance, price and moderate, molding early, the most in-depth research, the longest use of time, the application of the most extensive areas, so the birth of the alloy has been 67 years since the birth of the vitality of the exuberant.
This alloy China's brand name for the TC4, the United States titanium company (Timet) brand for the Ti-6Al-4V, the United States of America active metal company for the RMI 6Al4V, the British titanium metal for the IMI318, Russia's for the BT6, Japan's Sumitomo Metals for the ST-AI40, France's TA6V, the German Krupp company for the LT31. TC4 alloy in the annealed TC4 alloys are used in the annealed condition and can be heat-treated for strengthening, but have poor weldability. ti-6Al-4V The "ELI" in ELI stands for Extro-Low Interstitial titanium alloy, which are α and α + β titanium alloys that are suitable for low-temperature use, and whose strength properties increase with decreasing temperature. They are suitable for use at low temperatures. Their strength properties increase as the temperature decreases, and their toughness rarely decreases as the temperature decreases, so they can be used to manufacture low-temperature structural components. Low-temperature titanium alloys have very low oxygen content, from 0.2% oxygen to ≤0.12%, can be used at very low temperatures (＜77K), typical alloys are Ti-5Al-2.5Sn (ELI) and Ti-6AI-4V (ELI). Ti-5Al-2.5Sn ELI is an American alloy that was introduced in the early 1960s and copied in China in the 1970s under the brand name TA7 (Chinese military standard GJ B495). Ti-5Al-2.5Sn ELI is particularly suitable for liquid fuel tanks that operate at -255°C. Both of these titanium alloys are well supplied by China Baoti Group.
European Airbus A380 large passenger aircraft, is the world's largest wide-body civilian aircraft, but also the largest amount of titanium, titanium alloy parts and components of the net mass of about 10% of the total net mass of the aircraft, a single machine titanium dosage of about 65 tons. Titanium alloy parts are mainly: engine pods, skin, attached to the mouth, connecting ring wing, the front bulkhead, the shaft between the inner flap and the wing, the folded leaf rail track, the trailing edge, shaft parts, folded leaf 3 reinforcement, the engine part of the hanger, propulsion components, the leading edge, the front bracket, part of the landing gear, can be welded to make the wing (bar) rail.
about 65 tons of titanium used for a single aircraft.
