基于摆动的扫描策略对激光粉末床熔覆坡莫合金表面形貌的影响

Influence of Wobble-Based Scanning Strategy on Surface Morphology of Laser Powder Bed-Fabricated Permalloy.

作者信息

Huang Ta-Yu, Cheng Chung-Wei, Lee An-Chen, Chang Tsung-Wei, Tsai Mi-Ching

机构信息

Department of Mechanical Engineering, National Yang Ming Chiao Tung University, No. 1001, Ta Hsueh Road, Hsinchu 300, Taiwan.

Department of Mechanical Engineering, National Cheng Kung University, Tainan 701, Taiwan.

出版信息

Materials (Basel). 2023 Mar 2;16(5):2062. doi: 10.3390/ma16052062.

DOI:10.3390/ma16052062

PMID:36903177

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10004145/

Abstract

Surface roughness quality is still a significant problem in the laser powder bed fusion (LPBF) process. This study proposes a wobble-based scanning strategy to improve the insufficiencies of the traditional scanning strategy with regard to surface roughness. A laboratory LPBF system with a self-developed controller was used to fabricate Permalloy (Fe-79Ni-4Mo) with two scanning methods: traditional line scanning (LS) and the proposed wobble-based scanning (WBS). This study investigates the influences of these two scanning strategies on porosity and surface roughness. The results imply that WBS can maintain higher surface accuracy than LS, and the surface roughness can be reduced by about 45%. Furthermore, WBS can produce periodic surface structures arranged in fish scales or parallelograms with appropriate parameters.

摘要

表面粗糙度质量仍是激光粉末床熔融（LPBF）工艺中的一个重大问题。本研究提出一种基于摆动的扫描策略，以改善传统扫描策略在表面粗糙度方面的不足。使用一个配备自行开发控制器的实验室LPBF系统，采用两种扫描方法制备坡莫合金（Fe-79Ni-4Mo）：传统的线扫描（LS）和所提出的基于摆动的扫描（WBS）。本研究调查了这两种扫描策略对孔隙率和表面粗糙度的影响。结果表明，与线扫描相比，基于摆动的扫描可以保持更高的表面精度，并且表面粗糙度可降低约45%。此外，基于摆动的扫描可以通过适当的参数产生鱼鳞状或平行四边形排列的周期性表面结构。