600℃高温钛合金双性能整体叶盘锻件制备技术研究进展

Research Progress in Manufacturing Technology of 600℃ High Temperature Titanium Alloy Dual Property Blisk Forging

为了进一步挖掘600℃高温钛合金整体叶盘的性能潜力,通过材料技术和工艺技术的优化,创新发展了双性能整体叶盘设计思路及制备技术,即控制叶片和盘体分别采用最为适合航空发动机实际使用工况要求的组织状态,实现材料性能和结构设计的融合。在回顾整体叶盘结构发展历程及应用的基础上,分析先进发动机结构设计由追求均质整体叶盘向双性能整体叶盘转变的原因,重点介绍600℃高温钛合金TA29双性能整体叶盘锻件制备技术的最新研究进展。与分区控温锻造相比,分区控温热处理更容易实现双重组织的控制,即叶片获得等轴均匀细小的双态组织,盘体通过精确可控的β区热处理得到细晶的片层组织,过渡区的显微组织沿整体叶盘径向平缓变化。最后,指出600℃高温钛合金双性能整体叶盘应用研究未来拟解决的关键问题,包括整体叶盘叶片和盘体组织性能精确控制、过渡区位置及尺寸控制、关键服役性能评价与研究等。

In order to further explore the potential performance of 600℃ high temperature titanium al loy 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, mi crostructural control of blade region and disc body are respectively suitable for ＂the actual service condi tion 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 de velopment from homogeneous blisk to DP Blisk of structural design in advanced aeroengines were ana lyzed, ＂the latest research progress in manufacturing ＂technology of 600 ℃ high temperature titanium al loy 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 direc tion 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 micro structure and performance of blade and disc body, position and size control of the transitional region, and key service performance evaluation and research.