重型机械Issue(3)：13-18,6.
γ-TiAl合金与钢的异质材料连接工艺研究
Research on heterogeneous joining of γ-TiAl alloy and steel
摘要
Abstract
γ-TiAl alloy,as a low-density,high-specific-strength,high-temperature-resistant structural material,holds significant application value in the aerospace field.However,its heterogeneous joining with steel presents challenges due to substantial differences in physical properties and the tendency to form brittle intermetallic compounds.Firstly,reviewing recent advances in joining technologies for γ-TiAl alloy and steel,with particular focus on welding techniques,joint performance optimization,and interfacial metallurgical behavior.Secondly,the study examines the effects of process parameter optimization,intermediate layer material selection(e.g.,high-entropy alloys),and post-weld heat treatment on joint performance enhancement.The research results indicate that adopting Ti/Nb+V composite intermediate layers and optimized brazing parameters(temperature and duration)can effectively suppress brittle phase formation while significantly improving joint strength(achieving a room-temperature tensile strength of 457 MPa).Mechanical joining methods(including interference fit and double-arc self-locking threaded structures)and hybrid joining techniques(combining interference fit with brazing)are shown to effectively address thermal expansion coefficient mismatch issues.Furthermore,a novel interface microstructure control strategy based on thermodynamic analysis is proposed to optimize interfacial metallurgical behavior.For future research directions,recommend prioritizing:additive manufacturing process optimization,development of advanced high-entropy alloy intermediate layers,and establishment of standardized performance evaluation protocols to facilitate the engineering application of γ-TiAl alloy heterogeneous joining technologies.For future research directions,some suggestions were provided,including prioritizing:optimization of additive manufacturing processes,development of advanced high-entropy alloy intermediate layers,and establishment of standardized performance evaluation protocols to advance the engineering application of γ-TiAl alloy heterojunction technol-ogy.关键词
γ-TiAl合金/异质材料连接/焊接技术/接头性能Key words
γ-TiAl alloy/heterogeneous material joining/welding technology/joint performance分类
金属材料引用本文复制引用
刘烨,尚泳来,梁永森,高帆,薛兴旭,静永娟,宋志伟..γ-TiAl合金与钢的异质材料连接工艺研究[J].重型机械,2025,(3):13-18,6.基金项目
中国兵器工业集团有限公司自主科技创新项目(JY052024101) （JY052024101）
先进焊接与连接国家重点实验室开放课题研究基金资助(AWJ-23R0) （AWJ-23R0）
