NBD news: driven by huge investment and advanced development system, aeroengine single crystal blades containing rhenium are expected to take the lead in making a breakthrough.

Ping An Securities Research Report said that the "two aircraft project" will invest a lot of money in the short term: developing aviation, power first. The R & D expenses of American aeroengine (including model development, improvement and modification) account for about 25% of the R & D expenses of the whole aviation industry.

Among them, the pre research cost of engines not specific to specific models accounts for about 35% of the total R & D cost. Pratt Whitney invested $8.4 billion in the development of F135 engines for F-35 fighters. It is expected that the investment scale of the "two aircraft special projects" (major national aeroengine and gas turbine science and technology projects) to be disclosed is expected to reach 100 billion yuan, the cycle may be shortened to less than 10 years, and the investment intensity will be greatly improved. According to Reuters, in the next 20 years, China will eventually invest as much as $300 billion in the engine field. It is clear that China has invested funds to maintain advanced performance of jet engines and large turbofan engines.

Establish a new system and emphasize the independent development of core aircraft: the "trilogy" of American aeroengine development: pre research project, core aircraft plan and engine serialization. Referring to the IHPTET plan of the United States ("comprehensive high-performance turbine engine technology plan"), it is expected that the "two machine project" will focus on the independent development of core machines, strengthening pre research and product serialization, so as to realize the major change of engine production mode. In this way, different aircraft can be equipped with standardized and serialized core aircraft, completely overturning the old model that previous engine models catch up with aircraft models. This is also conducive to mass manufacturers to save costs, reduce the difficulty of maintenance and improve the matching rate.

Mobilizing all forces, the turbine single crystal blade is expected to take the lead in making a breakthrough. It is expected that the "two machine project" will first increase investment support in turbine blade materials, and will not stick to enterprises within the traditional military industrial system. It may widely support various market players, including civil science and technology enterprises and private enterprises, with the goal of realizing the localization of single crystal blades. The progress of aeroengine mainly depends on its thrust weight ratio, and the key is the temperature bearing capacity of blade materials. When the turbine inlet temperature increases by 100, the thrust weight ratio of aeroengine can increase by about 10%. From 1965 to 1985, the average turbine inlet temperature increased by 15 every year, of which the contribution of materials was about 7. 70% - 80% of the realization of IHPTET plan in the United States comes from the improvement of materials. In addition, 50% of the cost of Aeroengine Parts also comes from the materials themselves. At present, almost all advanced aeroengines abroad use the third generation nickel base single crystal alloy containing 5% rhenium as the main material of turbine blades. The average service life of aeroengine turbine blades is 10 years. The peak of the second generation replacing the third generation single crystal blades is coming, and the consumption of single rhenium will double. Regardless of the change in the number of blades of a single engine, the demand for rhenium in the international civil aviation engine market will increase by 211% in 2017 compared with 2011, and the compound annual growth rate will reach 16%.