TC25钛合金α+β锻件和准β锻件组织和性能研究  

Study on Microstructure and Properties ofα+βForging and Quasi-βForging of TC25 Titanium Alloy

作　　者：肖清云 郎连林 苏庆 张元伟 李玉凤 李晓婷 刘雅辉[4] 王俊[4] XIAO Qingyun;LANG Lianlin;SU Qing;ZHANG Yuanwei;LI Yufeng;LI Xiaoting;LIU Yahui;WANG Jun

机构地区：[1]中国航发贵州黎阳航空动力有限公司,贵州贵阳550000 [2]空装成都局驻贵阳地区第二军代表室,贵州贵阳550000 [3]无锡透平叶片有限公司,江苏无锡214000 [4]上海交通大学材料科学与工程学院,上海200240

出　　处：《模具技术》2023年第1期23-30,共8页Die and Mould Technology

摘　　要：为满足航空发动机钛合金锻件对安全性和可靠性的需求,以某型航空发动机第一级压气机盘TC25钛合金锻件为研究对象,对比分析了α+β锻件和准β锻件的微观组织和力学性能。结果表明:α+β锻件为双态组织,准β锻件为含初生α相的片层组织;α+β锻件在室温、高温下的抗拉强度和屈服强度较高,准β锻件的热稳定性较高。准β锻件较小的集束尺寸使其塑性较高。由于原材料的Al和O含量偏高,导致两种锻件的热稳定性偏低。两种锻件的持久寿命均满足要求。In order to meet the requirements for safety and reliability of titanium alloy forgings for aeroengines,in this paper,TC25 titanium alloy forgings of the first stage compressor disk of an aeroengine are taken as the research object,and the microstructures and mechanical properties ofα+βforgings and quasi-βforgings are compared and analyzed.The results show that theα+βforging has duplex microstructure,and the quasi-βforging has lamellar microstructure containing primary a phase;Theα+βforging has higher tensile strength and yield strength at room temperature and high temperature,and the quasi-R forging has higher thermal stability.The smaller cluster size of quasi-βforging leads to its letter plasticity.Due to the high Al and O content of raw materials,the thermal stability of the two forgings is low.The stress rupture life of the two forgings meets the requirements.

关 键 词：TC25钛合金压气机盘 α+β锻件 准β锻件 微观组织 力学性能 

分 类 号：TG249[金属学及工艺—铸造]