Recent development of new type powder metallurgy superalloys in Russia
ZHANG Yi-wen1, 2,CHI Yue1, 2,LIU Jian-tao1, 2
1. High Temperature Material Institute, Central Iron and Steel Research Institute, Beijing 100081, China 2. Beijing Key Laboratory of Advanced High Temperature Materials, Beijing 100081, China
Abstract：The latest development of new type BBП series(ВВ750П, ВВ751П, ВВ752П and ВВ753П) powder metallurgy(PM) superalloy designed for the fifth generation and fifth-and-one-half generation of aircraft engine (Russia division) were introduced. The PM superalloy discs are produced by directly hot isostatic pressing powders atomized by plasma rotating electrode process (PREP). The mechanical properties of BBП series PM superalloys, such as tensile strength, endurance strength at 650 ℃ and low cycle fatigue life are superior to those of ЭП741НП PM superalloy, while the plasticity and toughness of BBП series PM superalloys are inferior to those of ЭП741НП PM superalloy. BBП series PM superalloys components such as turbine discs meet the design requirements of the fifth generation and fifth-and-one-half generation of aircraft engine in Russia. The ВВ751П and ВВ752П superalloys has sound strength, and can be used as hot section components, such as turbine disc, which working at 650-700 ℃. The ВВ750П and ВВ753П PM superalloys has sound strength at higher temperature, and can be used as hot section components, such as turbine disc, which working above 750 ℃. In Russia, ВВ750П superalloys discs for turbine and compressor are in industrial batch production stage, ВВ751П superalloys discs have been applied in ПД14 and РД-133 engines, while the discs of ВВ752П and ВВ753П superalloys are presently in trial manufacturing stage.
2015, Vol. 25 
