Characters of spherical powders which were manufactured by plasma rotating electrode process (PREP) were investigated. Microstructure and performance of cryogenic titanium alloy which was manufactured by
hot iso鄄static pressing ( HIP) have been analyzed. Researches on powder metallurgy TA7ELI alloy near net鄄shape
process with appropriative mold was made and assembled by mild steel has been developed, and the high performance
and high dependability rotor with large dimension, thin鄄walled,semi鄄closed which was used for cryogenic rocket en鄄
gine have been manufactured by near net鄄shape process technology. Cryogenic titanium alloy powders which were
manufactured by PREP has very well sphericity shape, high tap鄄density, better granularity distribution, and nonmetal鄄
lic impurity is lower than 20 per kilogram. Powder metallurgy titanium alloy has the same level performance with the
forged material, and the microstructure of the powder metallurgy is equiaxial grain. Powder metallurgy cryogenic tita鄄
nium alloy impeller which is used for hydrogen pump has past the engine test.