Titanium consumption of aero engine

The amount of titanium used in advanced foreign engines is usually kept at 20% to 35%. The early turbojet engines produced in my country did not use titanium. The turbojet 13 engine, which was developed in 1978 and was designed and finalized in early 1988, used 13% of titanium. For aero engines with intellectual property rights, the amount of titanium has been increased to 15%, and my country’s first turbofan engine with independent intellectual property rights, which is about to be designed and finalized, has further increased the amount of titanium to 25%.

In the design of airplanes or engines, the alloy grades are mainly selected according to the working temperature and stress level of the parts, and the corresponding molding and welding performances are considered in conjunction with the manufacturing process plan of the parts. The characteristics of different types of Titanium Welding Rods are different, and the specific parts used are also different: α-type alloys cannot be strengthened by heat treatment, and have only moderate room temperature strength, but the structure is stable, the creep resistance is good, and it can work stably at higher temperatures for a long time. It is the basis for the creation of new heat-resistant titanium heat exchanger pipe, and is generally used as sheet metal parts and forgings with greater bearing capacity; β-type alloys have good process plasticity in the solid solution state, which is convenient for processing and forming, and can obtain high strength after aging treatment Performance, but high sensitivity to impurity elements, unstable structure, low heat resistance, not suitable for use at high temperatures, generally used as fasteners and aircraft structural parts; α + β type alloy has good thermal strength and cold Formability, good overall performance, and can be quenched and aging strengthened, generally used as turbine engine body components.