大规格损伤容限钛合金TC4-DT的研制及应用

doi:10.7527/S1000-6893.2019.23454

材料工程与机械制造

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大规格损伤容限钛合金TC4-DT的研制及应用

陈联国¹, 王文盛², 朱知寿³, 赵勇¹, 黄建云¹, 张海¹, 彭富华⁴

1. 中国航空工业成都飞机设计研究所, 成都 610091;
2. 西部超导材料科技股份有限公司, 西安 710012;
3. 北京航空材料研究院, 北京 100095;
4. 中国航空工业成都飞机工业(集团)有限责任公司, 成都 610091

收稿日期:2019-09-05 修回日期:2019-10-09 出版日期:2020-06-15 发布日期:2019-12-26
通讯作者: 陈联国 E-mail:chen_in_chengdu@163.com

Development and application of large-scale damage tolerance titanium alloy TC4-DT

CHEN Lianguo¹, WANG Wensheng², ZHU Zhishou³, ZHAO Yong¹, HUANG Jianyun¹, ZHANG Hai¹, PENG Fuhua⁴

1. AVIC Chengdu Aircraft Design and Research Institute, Chengdu 610091, China;
2. Western Superconducting Technologies Co. Ltd., Xi'an 710012, China;
3. Beijing Institute of Aeronautical Materials, Beijing 100095, China;
4. AVIC Chengdu Aircraft Industrial(Group) Co. Ltd., Chengdu 610091, China

Received:2019-09-05 Revised:2019-10-09 Online:2020-06-15 Published:2019-12-26

摘要/Abstract

摘要： 为了满足新一代战斗机对大规格损伤容限钛合金的需求，开展了TC4-DT钛合金大规格棒材与锻坯的成分与组织控制、大型锻件热处理过程中的显微组织控制、材料与锻件的制造过程控制、零件的疲劳强化等研究。经过大型铸锭熔炼、大规格棒材和锻坯试制、大厚度锻件试制、结构设计与制造，结果表明：损伤容限钛合金TC4-DT大型铸锭的成分均匀、大型锻坯和大厚度锻件的抗拉强度变异系数降至约2%，激光冲击、喷丸和冷挤压等对该合金的寿命增益效果显著。损伤容限钛合金TC4-DT在新一代战斗机上获得了广泛应用。

关键词: 损伤容限, 钛合金, 铸锭熔炼, 热处理, 片层组织, 过程控制, 激光冲击

Abstract: To meet the need of large-scale damage tolerance titanium alloy for new generation fighter, this paper examines the TC4-DT titanium alloy’s composition and macrostructure control of large-scale bar and forging stock, the microstructure control during heat treatment process of large-scale forgings, the manufacturing process control of material and forgings, and the fatigue strengthening of parts. The results of large-scale ingot melting, large-scale bar and forging stock trail production, heavy section forging trail production, and structural design and manufacture show that the damage tolerance titanium alloy TC4-DT’s composition of large-scale ingots is homogeneous and the tensile strength coefficient variation of large-scale forging stocks and heavy section forgings can be reduced to about 2%. The impacts of laser shock peening, shot peening, and cold extrusion have remarkable life increment of the titanium alloy. The damage tolerance titanium alloy TC4-DT has been widely applied on new generation fighters.

Key words: damage tolerance, titanium alloy, ingot melting, heat treatment, lamellar microstructure, process control, laser shock peening

中图分类号:

V252.2

陈联国, 王文盛, 朱知寿, 赵勇, 黄建云, 张海, 彭富华. 大规格损伤容限钛合金TC4-DT的研制及应用[J]. 航空学报, 2020, 41(6): 523454-523454.

CHEN Lianguo, WANG Wensheng, ZHU Zhishou, ZHAO Yong, HUANG Jianyun, ZHANG Hai, PENG Fuhua. Development and application of large-scale damage tolerance titanium alloy TC4-DT[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(6): 523454-523454.

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E-mail：hkxb@buaa.edu.cn

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大规格损伤容限钛合金TC4-DT的研制及应用

Development and application of large-scale damage tolerance titanium alloy TC4-DT

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