Selective laser melting of iron-based powder
Selective laser melting of iron-based powder
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DOI：
10.1016/j.jmatprotec.2003.11.051
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发表时间：
2004-06-10
影响因子：
6.3
通讯作者：
Lauwers, B
中科院分区：
文献类型：
--
作者：
Kruth, JP;Froyen, L;Lauwers, B
选择性激光熔化(SLM)是由于需要加工机械性能与块状材料相当的接近全密度的物体。在此过程中，粉末颗粒被激光完全熔化。由此产生的高密度可避免金属粉末选择性激光烧结(SLS)所需的冗长后处理。与SLS不同，SLM更难控制。由于激光的大能量输入和颗粒的完全熔化，产生了球化、残余应力和变形等问题。本文将描述SLM在不同类型的颗粒(Fe、Ni、Cu和Fe3P)的混合物中的应用。对出现的不同现象进行了讨论，并对工艺优化进行了描述。后者包括适当的工艺参数调整和特殊扫描策略的应用。得到的零件以其显微组织、密度和机械性能为特征。(C)2004爱思唯尔B.V.保留所有权利。
Selective laser melting (SLM) is driven by the need to process near full density objects with mechanical properties comparable to those of bulk materials. During the process the powder particles are completely molten by the laser beam. The resulting high density allows avoiding lengthy post-processing as required with selective laser sintering (SLS) of metal powders. Unlike SLS, SLM is more difficult to control. Because of the large energy input of the laser beam and the complete melting of particles problems like balling, residual stresses and deformation occur. This paper will describe SLM applied to a mixture of different types of particles (Fe, Ni, Cu and Fe3P) specially developed for SLM. The different appearing phenomenons are discussed and the process optimization is described. The latter includes an appropriate process parameter adjustment and the application of special scanning strategies. Resulting parts are characterized by their microstructure, density and mechanical properties. (C) 2004 Elsevier B.V. All rights reserved.