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

作　　者：陈联国 王文盛[2] 朱知寿[3] 赵勇[1] 黄建云[1] 张海[1] 彭富华 CHEN Lianguo;WANG Wensheng;ZHU Zhishou;ZHAO Yong;HUANG Jianyun;ZHANG Hai;PENG Fuhua(AVIC Chengdu Aircraft Design and Research Institute,Chengdu 610091,China;Western Superconducting Technologies Co.Ltd.,Xi’an 710012,China;Beijing Institute of Aeronautical Materials,Beijing 100095,China;AVIC Chengdu Aircraft Industrial(Group)Co.Ltd.,Chengdu 610091,China)

机构地区：[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

出　　处：《航空学报》2020年第6期374-382,共9页Acta Aeronautica et Astronautica Sinica

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。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.

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 

分 类 号：V252.2[一般工业技术—材料科学与工程]