低密度铌合金与铌铪合金电子束焊接性能分析  

Analysis on Welding Properties of Low Density Niobium Alloy and Niobiumhafnium Alloy by Electron Beam Welding

作　　者：许璠 刘政 张艳桥 宋国新 XU Fan;LIU Zheng;ZHANG Yanqiao;SONG Guoxin(Xi’an Space Engine Company Limited,Xi’an 710100)

机构地区：[1]西安航天发动机有限公司,西安710100

出　　处：《宇航材料工艺》2022年第4期77-82,共6页Aerospace Materials & Technology

基　　金：装备预研联合基金项目(6141B06310101)。

摘　　要：低密度铌合金与铌铪合金由于物理性能差异性较大,采用常规电子束方法焊接时,易产生焊接缺陷。为进一步探究低密度铌合金与铌铪合金焊接的可行性,通过数值模拟与工艺试验两种方法对其焊接接头的性能进行了系统研究。首先建立了异种材料有限元模型,对接头的温度场规律进行了分析;然后,采用真空电子束焊接的方法进行试验研究,从宏观形貌、力学性能、微观组织及元素分布等方面分析了接头性能。结果表明:采用电子束偏置铌铪侧焊接的方式,可获得无裂纹、无气孔,具有良好拉伸强度的低密度铌合金与铌铪合金接头。Due to the differences in physical property,low density niobium alloy and niobium-hafnium alloy were easy to produce welding defects when they were welded by conventional electron beam method.To further explore the feasibility of welding between low density niobium alloy and niobium-hafnium alloy,properties of the welded joint were numerical simulated and experimental studied.Firstly,the finite element model of dissimilar materials was established,and the temperature field of the joint was analyzed.Then,the experimental study was carried out by electron beam welding,and the macroscopic morphology,mechanical properties,microstructure and element distribution of the joint were analyzed.The results show that the joint of low density niobium-hafnium alloy and niobium-hafnium alloy without cracks,pores and has good tensile strength can be obtained by electron beam welding with niobium-hafnium alloy side offset.

关 键 词：低密度铌合金 铌铪合金 偏移量 电子束焊接 

分 类 号：G456.[文化科学—教育学]