What is a single crystal superalloy?

Single crystal superalloy is based on a single crystal. Because of its high alloying degree, it makes up for the difficulties of serious segregation, poor hot workability and difficult forming of traditional cast-forged superalloy ingots. It is mainly used for high-temperature bearing rotating parts such as turbine disks, compressor disks, drum shafts, sealing disks, sealing rings, guide wheels and high-pressure baffles of turbine disks.

development and application of powder, casting and forging, and single crystal superalloy

In the manufacture of aero-engines, powder superalloys make up for the difficulties of serious segregation, poor hot working performance and difficult forming of traditional casting and forging superalloys ingots, and are mainly used for high-temperature bearing rotating parts such as turbine disks, compressor disks, drum shafts, sealing disks, sealing rings, guide vanes and high-pressure baffles of turbine disks, among which

at present, the super-plastic isothermal forged powder superalloy turbine disk has been used in many western military aircraft engines (this is a necessary condition for the fourth generation and even higher performance advanced aircraft).

In China, the lack of large-tonnage extrusion equipment has always prevented the extrusion+superplastic forging process from being implemented. The recent construction of a 36,-ton vertical extruder for ferrous metal in Beizhong Group means an important step. In addition, the progress of nickel-based single crystal superalloy last year (single crystal has the least grain boundaries, so it can achieve a high degree of creep resistance, so single crystal casting of superalloy is one of the key technologies in high-tech export control in western countries) means that aero-engine manufacturing with high thrust-to-weight ratio has a certain material foundation.