(1. 北京航空材料研究院，北京 100095；
(2. 西北工业大学 凝固技术国家重点实验室，西安 710072；
(3. 景德镇航空锻铸集团公司，景德镇 333039)
摘 要: 研究不同尺寸规格和质量的TC4-DT钛合金自由锻件的组织与性能的影响因素。结果表明：为获得具有均匀组织和性能的TC4-DT钛合金自由锻件，应尽量避免采用单火次、大变形量的锻造方式。在制定合适的锻后热处理制度时，应综合考虑锻件的最大截面和尺寸因素。
关键字: TC4-DT钛合金；自由锻件；组织；性能；均匀性
（1. Beijing Institute of Aeronautical Materials，Beijing 100095, China;
(2. Stated Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China;
(3. Jinghang Forging & Casting Co., Ltd., Jingdezhen 333039, China）
Abstract:The influence factors of microstructure and property uniformity of TC4-DT titanium alloy free forgings with different sizes and mass were studied. The results show that a TC4-DT titanium alloy free forging with uniform microstructure and property will be achieved by a multi-step forging process with different smaller deformation rates instead of single-step process with a larger deformation rate. The factors of maximum thickness of cross section and mass of forgings should also be taken into account when a proper heat-treatment processing is used.
Key words: TC4-DT titanium alloy; free forging; microstructure; property; uniformity
