GH4099和GH3128异质高温合金TLP扩散焊接头组织与性能演化OA
Microstructural and Mechanical Property Evolution of GH4099 and GH3128 Dissimilar Superalloy Joints by TLP Diffusion Bonding
针对航空、航天等领域对异质镍基高温合金高可靠性连接的迫切需求,开展了异质镍基高温合金GH4099和GH3128 的瞬时液相扩散焊(transient liquid phase diffusion welding,TLP)研究,系统研究了焊接温度对接头显微组织与力学性能的影响规律,为异质材料的焊接提供理论指导.采用BNi-2 为中间层,通过EBSD、EPMA、SEM等手段对接头微观结构进行表征,并结合拉伸性能测试分析其力学行为.结果表明,随焊接温度升高,等温凝固区(ISZ)晶粒逐渐长大,扩散影响区(DAZ)晶界硼化物由连续状向断续状转变;焊接温度 1 120℃时接头力学性能最优,抗拉强度达到953 MPa,为GH3128 母材的 117.1%.
In response to the urgent demand for highly reliable joining of heterogeneous nickel-based superalloys in aerospace applications,transient liquid phase diffusion welding(TLP)of dissimilar nickel-based superalloys GH4099 and GH3128 was studied.The influence of the bonding temperature on the microstructure and mechanical properties of the joints was systematically investigated,providing theoretical guidance for welding dissimilar materials.BNi-2 was used as an interlayer,and the joint microstructures were characterized via EBSD,EPMA,and SEM.Tensile tests were performed to evaluate the mechanical properties.The results indicate that with increasing bonding temperature,grain growth gradually occurs in the isothermal solidification zone(ISZ)and that the borides along the grain boundaries in the diffusion-affected zone(DAZ)change from a continuous to a discontinuous morphology.The joint bonded at 1 120℃exhibits the best mechanical performance,with an ultimate tensile strength of 953 MPa,equivalent to 117.1%of the GH3128 base metal.
刘晓芸;郝定;巴特;熊江涛;李京龙
西北工业大学凝固技术全国重点实验室,陕西 西安 710072||西北工业大学摩擦焊接技术陕西省重点实验室,陕西 西安 710072西北工业大学凝固技术全国重点实验室,陕西 西安 710072||西北工业大学摩擦焊接技术陕西省重点实验室,陕西 西安 710072中国机械总院集团哈尔滨焊接研究所有限公司,黑龙江 哈尔滨 150028西北工业大学凝固技术全国重点实验室,陕西 西安 710072||西北工业大学摩擦焊接技术陕西省重点实验室,陕西 西安 710072西北工业大学凝固技术全国重点实验室,陕西 西安 710072||西北工业大学摩擦焊接技术陕西省重点实验室,陕西 西安 710072
矿业与冶金
高温合金BNi-2TLP界面组织演变力学性能
superalloysBNi-2TLPinterface microstructure evolutionmechanical properties
《铸造技术》 2026 (1)
39-49,11
国家自然科学基金面上项目(52475404)陕西省稀有金属装备制造共性技术研发平台(2024ZG-GXPT-02)
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