Transactions of Materials and Heat Treatment

Title：Influence of forging process on microstructure and mechanical properties for TC4 titanium alloy return material bars

Authors： Ye Ning1 2 Ran Xing1 Fu Xukai1 Zhu Mingyu1 Wang Yixin1 Ren Yonghai2 Guo Wenwen2 Lu Baiping3 Pan Zhiping3

Unit： 1. AVIC Heavy Machinery Co. Ltd. 2.Heavy Machinery Aerospace Materials Engineering (Guizhou) Co. Ltd. 3. School of Materials Science and Engineering Nanchang Hangkong University

KeyWords： TC4 titanium alloy return material ingot forging process ring rolling microstructure mechanical properties

ClassificationCode：TG316

year,vol(issue):pagenumber：2025,50(2):7-15

Abstract：

In order to explore whether the TC4 titanium alloy return material ingots and bars meet the usage requirements of aviation TC4 titanium alloy and the feasibility of application in the aviation field, for Φ425 mm×330 mm TC4 titanium alloy return material ingot prepared by the dual melting process of electron beam cold hearth remelting + vacuum arc remelting, the influences of forging process on the chemical composition of TC4 titanium alloy return material ingots and the microstructure and mechanical properties of TC4 titanium alloy return material bars were studied, and the applicability of TC4 titanium alloy return material bars to prepare special-shaped ring forgings based on the ring rolling process was explored. The results show that Φ210 mm TC4 titanium alloy return material bars are prepared by using eight rounds of forging (three rounds above the phase transition point and five rounds below the phase transition point of TC4 titanium alloy), which chemical composition, microstructure and mechanical properties meet the requirements of GB/T 2965—2023. The mechanical properties of TC4 titanium alloy return material special-shaped ring forgings are equivalent to those of normal new material forgings and meet the requirements of GJB 2274A—2019, indicating that the microstructure and properties of the special-shaped ring forgings prepared by the dual melting process of electron beam cold hearth remelting + vacuum arc remelting with TC4 titanium alloy return material are good,which is expected to reduce the cost of TC4 titanium alloy for aviation use.

Funds：

中航重机技术研究院创新基金（GK202203108）

作者简介：叶宁(1987-)，男，硕士，工程师,E-mail：1215368970@qq.com;通信作者：冉兴(1968-)，男，博士，正高级工程师,E-mail：ranx@avic.com

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