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《工程(英文)》 >> 2019年 第5卷 第4期 doi: 10.1016/j.eng.2019.07.002

微观选择性激光熔化技术发展的现状及未来展望

Singapore Institute of Manufacturing Technology (SIMTech), Agency for Science, Technology and Research (A*STAR), Singapore 637662, Singapore

收稿日期: 2018-07-27 修回日期: 2019-01-31 录用日期: 2019-03-14 发布日期: 2019-07-03

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摘要

增材制造(AM)能将各种材料制成形状复杂的部件,因此在制造业中越来越受到青睐。选择性激光熔化(SLM)是一种常见的AM技术,它基于粉床熔融法(PBF)来处理金属,但目前只专注于大中型元件的制作。本文综述了微型金属材料SLM的研究现状。与通常用于微观AM的直接写入技术相比,微观SLM由于许多因素而更加具有吸引力,包括更快的周期时间、流程简单性和材料通用性。此外,本文综合评价了利用SLM和选择性激光烧结(SLS)制造微尺度零件的各种研究工作和商业系统,不仅从微观尺度上找出了SLM存在的问题,包括粉末重涂、激光光学和粉末粒度等, 还详细阐述了SLM未来的发展方向。文章详细回顾了粉床技术中现有的粉末重涂方法,并描述了在AM领域实施干粉分配方法的新进展。对AM部件的一些二次整理技术进行了回顾,重点介绍了细微加工特征的应用以及与微观SLM系统的结合。

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