摘要
采用电子束焊接对GH4169和IC10异种镍基高温合金进行了焊接实验,利用金相显微镜、扫描电镜等对电子束焊接接头进行组织观察,并分析了镍基高温合金的力学性能。结果表明,通过电子束焊接可以得到无明显焊接缺陷的接头;焊缝区由枝状晶和等轴晶构成,且熔合区附近富集大量柱状晶,垂直于熔合线朝着焊缝中心生长;焊接后,GH4169和IC10母材中主要第二相为δ-Ni_(3)Nb相;100 kV加速电压焊接后,焊缝区平均显微硬度为235 HV,150 kV加速电压焊接后焊缝区平均显微硬度为225 HV,2个参数下焊缝区平均显微硬度均高于两端母材区,两端母材越靠近焊缝,由于热影响区的存在,硬度都有提高趋势。
In order to further study the effect of electron beam welding on nickel-based superalloy dissimilar materials,GH4169 superalloy and IC10 nickel-based single crystal superalloy were selected for the electron beam welding test.The microstructure of the electron beam welded joints was observed using metallographic microscope and scanning electron microscope,and the mechanical properties of the nickel based superalloys were analyzed.The results show that nickel-based superalloy dissimilar materials joints without obvious welding defects can be obtained through electron beam welding.The welded area is composed of dendritic and equiaxed grains,and a large number of columnar grains are enriched near the fusion area,growing perpendicular to the fusion line towards the center of the weld.After welding,the main second phase in the GH4169 and IC10 base metals is the δ-Ni_(3)Nb phase.After welding with an acceleration voltage of 100 kV,the average microhardness of the weld area is 235 HV,and after welding with an acceleration voltage of 150 kV,the average microhardness of the weld area is 225 HV.Under both parameters,the average microhardness of the weld zone is higher than that of the base metal zone at both ends.The closer the base metal at both ends is to the weld,the higher the hardness tends to increase due to the presence of the heat affected zone.
作者
彭靖
张嘉艺
吴若琛
袁名全
蔡华淋
PENG Jing;ZHANG Jiayi;WU Ruochen;YUAN Mingquan;CAI Hualin(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)
出处
《有色金属科学与工程》
CAS
北大核心
2024年第5期716-722,共7页
Nonferrous Metals Science and Engineering
基金
江西省自然科学青年基金资助项目(20232BAB214015)
江西省教育厅青年人才项目(GJJ210881)。
