Titanium has been widely used in the manufacture of large civil aircraft. Some key parts of landing gear and wheels are forged with titanium alloy, and a small number of parts are forged with aluminum alloy. In the C919 large aircraft, the net mass of titanium alloy parts accounts for about 10% of the total net mass of the aircraft. Among the civil aircraft manufactured in China, the amount of titanium is the largest. Which parts are made of titanium (see Figure 1): Ti-6Al-4VEVI forgings are used for the head; Ti-6Al-4V alloy forgings, plates and titanium alloy 55531 forgings are used for the suspension; Ti-6Al-4V alloy forgings are used for the tail; Ti-6Al-4V alloy forgings are used for the outer wings. -6Al-4V alloy forgings and plates; Ti-6Al-4V ELl alloy forgings for the central wing; Ti-6Al-4V alloy forgings for the landing gear system.
Ti-6Al-4V (TC4, GB/T3620) is a medium-strength (>900MPa) α+β-type alloy, which was developed by the US Watertown (also translated as Watertown) Arsenal in 1954 and is widely used in aviation In the aerospace field, its semi-finished product output accounts for 55%-65% of the world's total titanium production, which is used to produce various aerospace forgings and plates. Because of its excellent comprehensive performance, moderate price, early forming, and the most researched In-depth, used for the longest time, and the application field is the most extensive, so the alloy has maintained strong vitality since its birth 67 years ago. The grade of this alloy is TC4 in China, Ti-6Al-4V from American Titanium Company (Timet), RMI 6Al4V from American Active Metals, IMI318 from British Titanium, BT6 from Russia and BT6 from Sumitomo Metals from Japan. ST-AI40, TA6V of France, LT31 of Krupp of Germany. TC4 alloy is applied in the annealed state and can be strengthened by heat treatment, but the weldability is poor. "ELI" in Ti-6Al-4V ELI means Extro-Low Interstitial titanium alloys are α and α+β titanium alloys suitable for use at low temperatures, their strength properties increase with decreasing temperature, Toughness decreases very little with temperature and can be used to make low temperature structural parts. The oxygen content of low-temperature titanium alloys is very low, from ordinary grade 0.2% oxygen to ≤0.12%, and can be used at extremely 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, which was introduced in the early 1960s and was successfully copied in China in the late 1970s. The grade is TA7 (Chinese military standard GJ B495). Ti-5Al-2.5Sn ELI alloys are particularly suitable for liquid fuel storage tanks operating at -255°C. These two titanium alloys are available in sufficient supply from China Baotai Group.
Contact us for more information. Thank you
Nicole
Company: Baoji Jimiyun Dynamic Co., Ltd
Cuntry:China
Add:Baoti road,Jintai,Baoji city,Shaanxi,China
Cel:+86 13369210920
Gmail:nicole@jmyunti.com
Website:www.jm-titanium.com
