| 金属粉末特性对选区激光熔化工艺及其制件性能影响 |
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| 引用本文： | 李克峰,施麒,毛新华,谭冲,刘辛.金属粉末特性对选区激光熔化工艺及其制件性能影响[J].粉末冶金技术,2022,40(6):499-509. |
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| 作者姓名： | 李克峰 施麒 毛新华 谭冲 刘辛 |
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| 作者单位： | 1.广东省科学院新材料研究所, 广州 510650 |
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| 基金项目： | 广州市科技计划资助项目（201906040007）；广东省自然科学基金资助项目（2018A030313127）；广东省科学院院属骨干科研机构创新能力建设专项资助项目（2018GDASCX-0117） |
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| 摘 要： | 高品质金属粉末是选区激光熔化（selective laser melting，SLM）制备高性能制件的重要基础。粉体特性对选区激光熔化技术的影响及其机理研究是理解选区激光熔化技术不可或缺的重要组成部分。本文从粉末物理和化学特性出发，论述了粉末特性对选区激光熔化工艺、制件微观组织与性能的影响。结果表明，粉末的物理特性，尤其是粉末形貌和粉末粒度分布能显著影响其流动性和粉末床堆密度等关键工艺特性；而粉末的化学成分，特别是杂质成分，是影响制件相组成和微观组织的重要因素。在此基础上，本文进一步介绍了选区激光熔化过程中高能量源与粉末颗粒的冶金作用机理研究进展。
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| 关 键 词： | 选区激光熔化 粉末特性 粉末形貌 粒度分布 化学成分 |
| 收稿时间： | 2020-06-05 |
Effect of metallic powder properties on selective laser melting technology and component performances |
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| Affiliation: | 1.Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China2.Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application, Guangzhou 510650, China3.National Engineering Research Centre of Powder Metallurgy of Titanium & Rare Metals, Guangzhou 510650, China |
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| Abstract: | High-quality metallic powders are essential for the selective laser melting (SLM) technology. The powder characteristics are indispensible for the understanding of SLM technology. The influences of powder physical and chemical characteristics on SLM processing, component microstructure, and mechanical properties were reviewed in this work. For the physical properties, the powder morphology and powder size distribution could significantly influence the powder flowability and powder-bed packing density, which were vital for the subsequent laser melting. On the other hand, the chemical compositions, especially the contents of impurities, determined the phase constitutes and microstructures. Furthermore, the recent progress on the interaction between laser and powder and the corresponding metallurgical mechanism were also introduced. |
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