| 扫描速度对激光熔覆NiAlBSi高温合金涂层组织和性能的影响 |
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| 引用本文： | 姚标,王存山,王锐,姜超.扫描速度对激光熔覆NiAlBSi高温合金涂层组织和性能的影响[J].中国激光,2011(10). |
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| 作者姓名： | 姚标 王存山 王锐 姜超 |
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| 作者单位： | 大连理工大学三束材料改性教育部重点实验室; |
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| 摘 要： | 采用激光熔覆技术在45#钢表面制备NiAlBSi高温合金涂层。利用X射线衍射仪、扫描电镜、电子探针、显微硬度计、摩擦磨损试验机和热重分析仪,对不同激光扫描速度下合金涂层的相组成、微观组织、成分、显微硬度、耐磨性和高温抗氧化性进行了分析。研究结果表明,不同激光扫描速度下合金涂层皆是由树枝状NiAl金属间化合物构成。随着扫描速度的增加,由于树枝晶逐渐细化,合金涂层的硬度增加,但耐磨性能和抗高温氧化性则呈现出先增后降的变化趋势,在激光扫描速度为4 mm/s时,合金涂层具有最好的耐磨性能和抗高温氧化性能。
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| 关 键 词： | 激光技术 激光熔覆 高温合金涂层 Ni-Al合金 微观组织 |
Influence of Scanning Velocity on Microstructure and Properties of Laser Clad NiAlBSi High-Temperature Alloy Coatings |
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| Yao Biao Wang Cunshan Wang Rui Jiang Chao.Influence of Scanning Velocity on Microstructure and Properties of Laser Clad NiAlBSi High-Temperature Alloy Coatings[J].Chinese Journal of Lasers,2011(10). |
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| Authors: | Yao Biao Wang Cunshan Wang Rui Jiang Chao |
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| Affiliation: | Yao Biao Wang Cunshan Wang Rui Jiang Chao (Key Laboratory for Materials Modification by Laser,Ion,and Electron Beams,Ministry of Education,Dalian University of Technology,Dalian,Liaoning 116024,China) |
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| Abstract: | NiAlBSi high-temperature alloy coatings are prepared by laser cladding on the 45# medium steel.The microstructures and properties of the NiAlBSi alloy coatings obtained at different scanning velocities are investigated by means of X-ray diffraction,scanning electron microscopy,electron probe microanalyzer,Vickers hardness tester,friction wear testing machine,and thermal analyzer.The results show that all coatings consist of Ni-Al dendrites.With the increase of scanning velocity,the hardness values of the co... |
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| Keywords: | laser technique laser cladding high temperature alloy Ni-Al alloy microstructure |
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