en.Wedoany.com Reported - The AECC Beijing Institute of Aeronautical Materials has made significant progress in the field of single-crystal turbine blade technology. The team led by Li Jiarong, the institute's full-time chief engineer, has developed a single-crystal superalloy with independent intellectual property rights, reaching internationally advanced levels. Single-crystal turbine blades are the core of hot-section components in aircraft engines, and their temperature tolerance directly determines the engine's energy conversion efficiency, thrust, fuel consumption, and overall performance. Currently, the turbine inlet temperature of commercial engines can exceed 1500°C, while military engines operate at even higher temperatures to meet extreme tactical demands.
Li Jiarong's team has also revealed the formation mechanisms of crystallization and recrystallization defects in single-crystal turbine blades, as well as the crystal growth mechanisms, achieving breakthroughs in key technologies for preparing composite air-cooled and double-wall ultra-cooled single-crystal turbine blades. Single-crystal turbine blades must serve safely and stably over long periods under harsh conditions of ultra-high temperatures, high pressure, high rotational speeds, and corrosive gas erosion. Compared to the polycrystalline alloy turbine blades used in the 1960s and 1970s, single-crystal alloys employ a special process to form the entire blade into a single complete crystal, achieving a qualitative leap in structural strength and high-temperature resistance.
The casting of single-crystal turbine blades follows the lost-wax process, involving over ten major core processes from alloy smelting to finished product delivery, with each core process further subdivided into a dozen to dozens of fine sub-processes. Currently, only the United States, the United Kingdom, Russia, France, and China can independently master the full-chain technology of single-crystal turbine blades, encompassing complete material research and development, precision casting, and engineering applications. Since the 1980s, the Beijing Institute of Aeronautical Materials has pioneered the development of single-crystal superalloys with independent intellectual property rights, as well as China's first single-crystal turbine blade and first single-crystal hollow turbine blade.
Established on May 26, 1956, the AECC Beijing Institute of Aeronautical Materials has witnessed the journey of China's aeronautical materials industry from catching up to running alongside, and even leading in certain areas.
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