ABSTRACT

SLM (Selective Laser Melting) is an AM (Additive Manufacturing) technology able to manufacture components with high structural integrity; however, a key drawback is the resulting poor surface quality of these parts. In order to reduce the roughness of these surfaces different treatments could be applied, but all of them have limitations when applied to SLM parts. One of the main challenges for surface treatments is to provide quality surfaces regardless of its starting state or geometry. Currently, chemical polishing is the best positioned treatment to achieve this but it usually employs hazardous electrolytes. Therefore, more comparative data about the performance of alternative treatments to polish parts with different geometrical characteristics are required by industry. In this study, electropolishing, blasting and laser have been applied, either separately or combined, to complex SLM Ti6Al4 V parts. The most promising technologies have been also applied to parts with different planes and internal cavities.

摘要

SLM（选择性激光熔化）是一种 AM（增材制造）技术，能够制造具有高度结构完整性的部件；然而，一个关键的缺点是这些零件的表面质量很差。为了降低这些表面的粗糙度，可以应用不同的处理方法，但在应用于 SLM 零件时，所有这些处理方法都有局限性。表面处理的主要挑战之一是提供高质量的表面，而不管其初始状态或几何形状。目前，化学抛光是实现这一目标的最佳处理方法，但它通常使用危险的电解质。因此，行业需要更多关于抛光具有不同几何特征的零件的替代处理性能的比较数据。在这项研究中，已经应用了电解抛光、喷砂和激光，单独或组合，以复杂的 SLM Ti6Al4 V 零件。最有前途的技术也已应用于具有不同平面和内腔的零件。