镍基高温合金K4169熔敷金属间化合物CrFeNb熔合区微观组织结构

发布时间：2018-02-21 10:44

本文关键词： 氩弧熔敷金属间化合物熔合区微观组织　出处：《焊接学报》2015年02期 　论文类型：期刊论文

【摘要】：采用氩弧熔敷的方法在镍基高温合金K4169表面熔敷高温金属间化合物Cr Fe Nb.利用扫描电镜(SEM)和能谱分析(EDS)及X射线衍射(XRD)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42μm厚度的熔合区;熔合区无气孔、裂纹等缺陷,基材与熔敷金属材料呈冶金结合.根据能谱分析和X射线分析发现熔合区由γ,γ',Fe2Nb和Cr Fe Nb相组成,这些相以细小的基材组织、白色块状组织及菊花状组织形式存在;联生方式结晶和高熔点Cr Fe Nb相形核使熔敷金属材料Cr Fe Nb与基材K4169呈现嵌套结构.
[Abstract]:The high temperature intermetallic compound Cr Fe NB was deposited on the surface of nickel-based superalloy K4169 by argon arc deposition. The microstructure and composition distribution of the fusion zone were studied by means of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). A fusion zone about 42 渭 m thick was formed between K4169 and high temperature intermetallics. According to the energy spectrum analysis and X-ray analysis, the fusion zone is composed of 纬, 纬 -Nb Fe 2Nb and Cr Fe NB phase. These phases exist in the form of fine substrate structure, white block structure and chrysanthemum structure. Combined crystallization and high melting point Cr Fe NB nucleation make the deposited metal material Cr Fe NB and substrate K4169 have nested structure.
【作者单位】：西北工业大学机电学院;西北工业大学工程训练中心;西北工业大学凝固技术国家重点实验室;
【基金】：国家自然科学基金资助项目(51054007,51374173) “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)
【分类号】：TG132.3;TG174.4

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