Titane dans Aviation Et Aérospatiale Applications

The invention of the aeroplane at the beginning of the 20th century opened a new era of human aerospace. Early aircraft manufacturing materials are mainly wood, but there are fragile, easy to break and easy to decay defects, with the aircraft in the first and second world war, people's performance requirements of the aircraft is more and more high, so the plasticity is good, high strength, easy to process, lighter weight aluminium alloy aircraft came into being, but the aluminium alloy aircraft, a non-existent high-temperature resistance, wear-resistant shortcomings. In order to solve the above problems, scientists have been looking for an alternative to aluminium alloy to make aircraft skeleton metal, so titanium into the vision of the aircraft manufacturers. From the nature of titanium can be seen, titanium's density is small, but also has a high thermal strength and enduring strength, in the vibration load and impact load under the action of crack expansion degree low sensitivity, but also has good corrosion resistance, titanium and its alloys of strength and steel strength is comparable to the weight is 57% of the steel, so the use of titanium alloys instead of aluminium alloys to manufacture aircraft is the trend, in modern aircraft manufacturing, people will be in the aircraft engine In modern aircraft manufacturing, people will be in the aircraft engine and shell structure, the general use of high-strength titanium and titanium alloy Q to replace the aluminium alloy. At present, titanium alloy-based manufacturing aircraft in the field of aviation has accounted for the proportion of the overwhelming advantage, especially the U.S. military aircraft are mostly titanium alloy products. For example, its hypersonic reconnaissance aircraft SR-71, the aircraft in the titanium alloy mass accounted for 92% of the total mass of the aircraft, and for the first time the use of beta titanium alloy. Another example is the American fourth-generation fighter F-22, the space shuttle, the proportion of titanium has reached 50-60 per cent. Also, F-14, F-15, F-18 Hornet, F-117 Nighthawk, B-1 bomber, B-2 bomber within the proportion of titanium in order of 24%, 27%, 13%, 25%, 22%, and 26%. The amount of titanium used in the weight composition of a supersonic aircraft is going to be more than 95%. It has proved difficult to develop supersonic aircraft without the use of titanium alloys, because aircraft made of titanium alloys can reduce the mass by about 5t compared with aluminium alloys, and the speed of titanium alloy aircraft is greatly increased in the case of the same amount of passengers. In addition, in the development of rockets and other aviation engines, titanium application ratio is also increasingly high, generally accounted for 18% to 25% of the total weight, according to research, half of the world's production of titanium are applied to the aviation engine.