| 镍铁基高温合金熔敷Co3FeNb2金属间化合物熔合区组织结构分析 |
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| 引用本文： | 田齐,赵志龙,艾昌辉,任海果,李景伟,刘林.镍铁基高温合金熔敷Co3FeNb2金属间化合物熔合区组织结构分析[J].焊接学报,2014,35(4):99-102. |
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| 作者姓名： | 田齐 赵志龙 艾昌辉 任海果 李景伟 刘林 |
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| 作者单位： | 1.西北工业大学机电学院, 西安 710072 |
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| 基金项目： | 国家自然科学基金资助项目(51054007);高档数控机床与基础制造装备科技重大专项资助项目(20092X04006-042) |
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| 摘 要： | 采用氩弧熔焊的方法在镍铁基高温合金K4169表面熔敷高温金属间化合物Co3FeNb2.利用电镜扫描(SEM)和能谱分析(EDS)及X射线分析研究熔合区的微观组织特征及成分分布.结果表明,在K4169与高温金属间化合物之间形成了约85 μm厚度的熔合区,熔合区无气孔、裂纹等缺陷,形成良好的冶金结合.根据能谱分析和X射线分析发现熔合区的组织大部分为γ',γ和Co3FeNb2相,少量熔敷金属Co和Nb元素的扩散使得基材在熔合区局部得到强化.同时在熔合区形成了基材γ和γ'相与Co3FeNb2和NbNi9等Nb元素的化合物形成的机械混合物,结合牢固.
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| 关 键 词： | 氩弧焊接 金属间化合物 熔合区 高温合金 |
| 收稿时间： | 2012/12/20 0:00:00 |
Microstructure analysis of Co3FeNb2 intermetallics coating layer on Ni-Fe-base superalloy |
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| TIAN Qi,ZHAO Zhilong,AI Changhui,REN Haiguo,LI Jingwei and LIU Lin.Microstructure analysis of Co3FeNb2 intermetallics coating layer on Ni-Fe-base superalloy[J].Transactions of The China Welding Institution,2014,35(4):99-102. |
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| Authors: | TIAN Qi ZHAO Zhilong AI Changhui REN Haiguo LI Jingwei and LIU Lin |
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| Affiliation: | 1.School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China2.Engineering Training Center, Northwestern Polytechnical University, Xi'an 710100, China3.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China |
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| Abstract: | High-temperature intermetallic compound (IMC) Co3FeNb2 was deposited on K4169 alloy substrate by argon arc cladding technique. The microstructure and element distribution of the cladding layer were analyzed by scanning electron microscope (SEM),X-Ray diffraction and energy dispersive spectrum (EDS). The results show that an 85 μm thick fusion layer was generated between the K4169 alloy substrate and Co3FeNb2 IMC by forming metallurgical bonding without defects such as pores or cracks. EDS analysis and X-ray analysis results reveal that most of the fusion zone microstructure were γ',γ and Co3FeNb2 phase, and the diffusion of a small amount of Co and Nb strengthened the fusion zone. Meanwhile, mechanically mixed phases including the substrate γ',γ and Co3FeNb2,NbNi9 IMCs formed in the fusion zone,leading to solid bonding. |
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| Keywords: | argon arc intermetallic compound fusion layer superalloy |
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