| Fabrication of directional solidification components of nickel-base superalloys by laser metal forming |
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| 引用本文： | LipingFeng WeidongHuang DarongChen XinLin HaiouYang. Fabrication of directional solidification components of nickel-base superalloys by laser metal forming[J]. 北京科技大学学报(英文版), 2004, 11(2): 169-172 |
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| 作者姓名： | LipingFeng WeidongHuang DarongChen XinLin HaiouYang |
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| 作者单位： | [2]StateKeyLaboratoryofSolidificationProcessing,NorthwesternPolytechnicalUniversity,Xi＇an710072,China [3]StateKeyLaboratoryofTribology,TsinghuaUniversity,Beijing100084.China [4]StateKeyLaboratoryofTribology,TsinghuaUniversity,Beijing100084.China／StateKeyLaboratoryofSolidificationProcessing,NorthwesternPolytechnicalUniversity,Xi＇an710072,China |
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| 基金项目： | 国家高技术研究发展计划(863计划)，the Development Plan of State Key Fundamental Research of China |
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| 摘 要： | Straight plates, hollow columns, ear-like blade tips, twist plates with directional solidification microstructure made of Rene 95 superalloys were successfully fabricated on Nickel-base superalloy and DD3 substrates, respectively. The processing conditions for production of the parts with corresponding shapes were obtained. The fabrication precision was high and the components were compact. The solidification microstructure of the parts was analyzed by optical microscopy. The results show that the solidification microstructure is composed of columnar dendrites, by epitaxial growth onto the directional solidification substrates. The crystallography orientation of the parts was parallel to that of the substrates. The primary arm spacing was about 10μm, which is in the range of superfine dendrites, and the secondary arm was small or even degenerated. It is concluded that the laser metal forming technique provides a method to manufacture directional solidification components.
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| 关 键 词： | 镍基超耐热合金 定向凝固 激光金属成型 激光多层覆层 单晶体 |
Fabrication of directional solidification components of nickel-base superalloys by laser metal forming |
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| Liping Feng,Weidong HUANG,Darong Chen,Xin Lin,Haiou Yang. Fabrication of directional solidification components of nickel-base superalloys by laser metal forming[J]. Journal of University of Science and Technology Beijing, 2004, 11(2): 169-172 |
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| Authors: | Liping Feng Weidong HUANG Darong Chen Xin Lin Haiou Yang |
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| Abstract: | Straight plates, hollow columns, ear-like blade tips, twist plates with directional solidification microstructure made of Rene 95 superalloys were successfully fabricated on Nickel-base superalloy and DD3 substrates, respectively. The processing conditions for production of the parts with corresponding shapes were obtained. The fabrication precision was high and the components were compact. The solidification microstructure of the parts was analyzed by optical microscopy. The results show that the solidification microstructure is composed of columnar dendrites, by epitaxial growth onto the directional solidification substrates. The crystallography orientation of the parts was parallel to that of the substrates. The primary arm spacing was about 10 μm, which is in the range of superfine dendrites, and the secondary arm was small or even degenerated. It is concluded that the laser metal forming technique provides a method to manufacture directional solidification components. |
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| Keywords: | laser multi-layer cladding laser metal forming directional solidification single crystal |
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