铸造技术2026，Vol.47Issue(8)：894-902,9.DOI:10.16410/j.issn1000-8365.2026.5261
添加镍箔中间层的异种高温合金层板结构扩散焊研究
Research on the Diffusion Bonding of Dissimilar Superalloy Laminates Structure with Nickel Foil Interlayer
摘要
Abstract
To meet the design requirements of higher thrust-to-weight ratios for the new generation of aeroengines,laminate structures have gradually become a research hotspot.GH4099 and GH3128,as typical nickel-based superalloys,are widely used in laminate structures because of their excellent high-temperature strength,oxidation resistance and creep resistance.However,direct diffusion bonding is prone to produce pores and carbide defects,resulting in low joint strength.Therefore,this study aims to systematically investigate the influence of diffusion bonding temperature(1 040～1 160℃)on the microstructure and mechanical properties of GH4099/GH3128 joints by adding a 3 μm Ni foil interlayer to optimize the process parameters and improve the mechanical properties of the joints.The microstructure and mechanical properties were characterized by scanning electron microscopy(SEM)and tensile tests.The results show that the Ni interlayer can effectively eliminate interface pores,and the solid solution effect of Ni on C causes a carbon-poor zone to form at the joint interface;carbides containing W and Mo precipitate on the GH3128 side,and a small amount of the γ'phase is generated on the GH4099 side;when the bonding parameters are 1 120℃-10 MPa-60 min,the mechanical properties of the joint are optimal,with a tensile strength of 938 MPa and an elongation of 17％.关键词
扩散焊/GH4099/GH3128/接头组织/力学性能Key words
diffusion bonding/GH4099/GH3128/joint microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
刘沔,郝定,宋添阳,熊江涛,袁琳..添加镍箔中间层的异种高温合金层板结构扩散焊研究[J].铸造技术,2026,47(8):894-902,9.基金项目
国家自然科学基金(52575447) （52575447）
陕西省稀有金属装备制造共性技术研发平台(2024ZG-GXPT-02) （2024ZG-GXPT-02）
