钢铁钒钛2025，Vol.46Issue(3)：41-44,52,5.DOI:10.7513/j.issn.1004-7638.2025.03.007
TC21钛合金与G50钢的超高强扩散焊接头组织与性能研究
Microstructure and properties of ultra-high strength diffusion-bonded joint between TC21 titanium alloy and G50 steel
摘要
Abstract
An ultra-high strength joint between TC21 titanium alloy and G50 high-strength steel had been prepared by an improved diffusion bonding in this study.Under the constraints of a rigid mold,the diffusion bonding using the V and Cu as interlayers was carried out at 915 ℃ for 60 minutes with an axial load of 20 MPa.Unlike the traditional diffusion bonding processes where the joint was under uni-directional compressive stress,the bonded samples in this study were subjected to triaxial compressive stress state,which promoted more sufficient metal flow and elemental diffusion at the interfaces.This effectively eliminated interfacial defects such as voids and micro-pores.The tensile strength of the joint was as high as 752 MPa,which was so far the highest that have been reported in the literature for the joints between titanium and steel prepared by diffusion bonding.The interface analysis showed that there were no precipitates at the TC21/V and V/Cu interfaces,and Fe-rich precipitates were observed at the Cu/G50 interface.In the tensile test,the fracture occurred in the interface between Cu and G50,res-ulting from the Fe-rich precipitates.关键词
TC21钛合金/G50高强钢/扩散焊/超高强焊接接头Key words
TC21 titanium alloy/G50 high-strength steel/diffusion bonding/ultra high strength joint分类
矿业与冶金引用本文复制引用
刘姣,成培鑫,席锦会..TC21钛合金与G50钢的超高强扩散焊接头组织与性能研究[J].钢铁钒钛,2025,46(3):41-44,52,5.基金项目
国家重点研发计划(2022YFB3705604),陕西省稀有金属装备制造共性技术研发平台(2024ZG-GXPT-02). （2022YFB3705604）
