Effect of Initial Surface Features on Laser Polishing of Co-Cr-Mo Alloy Made by Powder-Bed Fusion
Effect of Initial Surface Features on Laser Polishing of Co-Cr-Mo Alloy Made by Powder-Bed Fusion
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DOI：
10.1007/s11837-018-3216-2
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发表时间：
2019-03-01
期刊：
影响因子：
2.6
通讯作者：
Pfefferkorn, F. E.
中科院分区：
文献类型：
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作者：
Richter, B.;Blanke, N.;Pfefferkorn, F. E.
关于广泛使用由粉末床熔融工艺产生的部件的挑战之一是它们的高表面粗糙度，这需要某种类型的后成型精加工工艺。激光抛光（即，重熔）是这样一种潜在的精加工工艺，其使用表面张力驱动的流动来降低被照射的金属表面的粗糙度。这项工作检查的效果，表面特征上建成的部分上的性能的连续波激光重熔的钴铬钼合金（Celsit 21-P，钨铬钴合金21等效）的粉末床熔融制造的样品。这是通过使用焦点变化显微镜激光重熔前后的三维表面测量的比较来完成的。还介绍了用于模拟激光重熔表面轮廓的工程模型。这项工作的结果提供了深入了解的基本物理过程中发生的激光重熔粉末床熔融制成的零件，并将有助于表面固结和平滑的参数选择。
One of the challenges regarding widespread use of parts created by the powder-bed fusion process is their high surface roughness, which necessitates some type of postbuild finishing process. Laser polishing (i.e., remelting), which uses surface-tension-driven flow to reduce the roughness of irradiated metallic surfaces, is one such potential finishing process. This work examines the effect that surface features on the as-built part have on the performance of continuous-wave laser remelting of Co-Cr-Mo alloy (Celsit 21-P, Stellite 21 equivalent) samples produced by powder-bed fusion manufacturing. This is accomplished by comparison of three-dimensional surface measurements before and after laser remelting using focus-variation microscopy. Engineering models used to simulate the surface profile as a result of laser remelting are also presented. The results from this work provide insight into the fundamental physics occurring during laser remelting on parts made by powder-bed fusion and will aid parameter selection for surface consolidation and smoothing.