titanium

Why can an aircraft fly and soar through the air? Because it has an engine to provide it with power, but most people do not understand what materials are used to make the engine. Or that is made of steel, of course, steel is essential, but in addition to steel, but also used aluminum alloys, titanium alloys, composites and high-temperature alloys, at the same time, with the passage of time and titanium performance improvements and price reductions in the proportion of aircraft engine materials, titanium's share of the increase year by year. At the same time, different countries, different companies, different models, different engines, the amount of titanium material used also has a big difference.
Jet engine is the main application of titanium, the United States Pratt - Whitney (Pratt &Whitney) production of the engine, titanium alloy parts and components of the net quality of its total quality of 7% to 18%, the United States of America General Electric Company (GE) of the J73 jet engine titanium accounted for 6%. U.S. J79 engine 17-stage rotor was originally stainless steel, and later improved 11-stage disk changed to titanium alloy, in the J79-8 engine using 20% of the titanium alloy workpiece, but in the previous J79-3 engine titanium alloy parts in the quality of only 4%.

The fan blades of the low-pressure compressor of the American JT3D turbofan engine, as well as its spacer and fan valve, are made of Ti-6A1-4V alloy. The fan blades are 406mm long, two times longer than the compressor blades.The JT9D fan blades are 711mm long, nearly 10 times longer than the compressor blades.The amount of titanium alloy used in the JT9D turbofan engine accounts for 28% of the mass, about 1.035t, of which 46 fan blades are made of Ti-6AI-4V alloy. The rotor of the low-pressure pressurizer and the 9th stage of the 11-stage high-pressure pressurizer are made of Ti-6AI-4V, Ti-8AI-1Mo-1V and Ti-6Al-2Sn-4Zr-2Mo alloys, the latter of which can withstand 480°C, and 450kg were used, and the static blades are made of Ti-5Al-2.5Sn alloy.
Britain, the United States, Germany, Italy and Japan and other countries manufactured V2500 engine weight 2.2t, titanium accounted for 31%. British Rolls-Royce (Rolls-Royce) manufactured high-pressure pressurized machine 3 to 6 levels used in high creep resistance alloy IMI 550 (Ti-4AI-4Mo-2Sn-0.5Si) alloy, Japanese-made engine fan and low-pressure pressurized machine with Ti-6AI-4V alloy.