600℃高温钛合金双性能整体叶盘锻件制备技术研究进展

In order to further explore the potential performance of 600℃ high temperature titanium alloy blisk, the design idea and corresponding manufacturing technology of dual property blisk (DP-Blisk) have been innovated by optimizing of material technology and process technology, namely, microstructural control of blade region and disc body are respectively suitable for the actual service condition requirements of aeroengine to integrate material properties and structural design perfectly. Based on reviewing the development process and application of titanium alloy blisk, the reasons for the development from homogeneous blisk to DP-Blisk of structural design in advanced aeroengines were analyzed, the latest research progress in manufacturing technology of 600℃ high temperature titanium alloy TA29 DP-Blisk forging was introduced. Compared with separated region temperature-controlled forging (SRTCF) process, separated region temperature-controlled heat treatment (SRTCHT) process can achieve the expected dual microstructure more easily, that is, the blade region obtains uniform and fine bi-modal structure, and the disc body obtains fine lamellar structure by means of controllable SRTCHT process, the microstructure of transitional region changes gradually along the radial direction of the blisk forging. Finally, key issues need to be solved in the future in application research of DP-Blisk of 600℃ high temperature titanium alloy were proposed, including precise control of microstructure and performance of blade and disc body, position and size control of the transitional region, and key service performance evaluation and research.