导航

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1987, Vol. 8 ›› Issue (1): 10-19.

• 论文 • Previous Articles     Next Articles

STATE-OF-ART AND PROSPECT FOR MATERIALS AND HOT WORKING TECHNOLOGY FOR GAS TURBINE DISK

Xu Changgan   

  1. Beijing Institute of Aeronautics and Astronautics
  • Received:1986-01-22 Revised:1900-01-01 Online:1987-01-25 Published:1987-01-25

Abstract: The state-of-art and prospect for materials and hot working technology for gas-turbines, made in China, were reviewed in the present paper.Materials used for gas-turbine disk, which were loaded with complex stresses and undergone non-uniform distribution of temperature, have been developed starting from stainless steels to super-alloys, since 1940. Such disks, either formed with casting or forging technology, exhibiting inevitably a series of metallurgical defects, greatly reduce the working life of a gas turbine. So that it seems to be more important to develop new manufacture technology, in order to reduce the metallurgical defects to a minimum, rather than reseaches on new alloying composition.Some advanced technological processes have been developed recently, among then there are powder metallurgy, isothermal hot working and he-at-isopress technology. Due to lack of uniformity, stability and cleanliness, however,powder metallurgy method often renders disk's low-cycle fatigue failure. The later two processes might be the appropriate production methods to improve the working life and utilities of gas-turbine disks, used for manufacture of large thrust to weight ration gas turbines.It is concluded that researches on new alloying compositions and new forming processes should be proceeded hand in hand. For the purpose of improving turbine performance, researches on new forming processes might be more important.