Considerable surface texture is one of the typical drawbacks of laser powder bed fusion (LPBF). Especially up-facing inclined surfaces suffer from insufficient quality, due to the combination of the staircase effect (also called stair-stepping effect), attached powder particles and elevated edges (edge effect). In this work, the contribution of the edge effect to the topography of up-facing inclined surfaces is investigated in detail for the first time. Moreover, the effect of contour scanning was evaluated on up-facing surfaces over the whole range of inclinations, from horizontal to vertical. The edge effect was found to play a dominant role for surfaces with a low inclination angle, especially when contour scanning is used. A suitable scanning strategy can thus be determined for each surface inclination. In the present study, an optimization of scanning strategy allowed a significant improvement of the inclined surface quality. The arithmetical mean height of the roughness profile R_a could be reduced up to 52% for low inclinations, 20% for high inclinations and 32% for vertical walls.

相当大的表面纹理是激光粉末床熔合（LPBF）的典型缺陷之一。由于阶梯效应（也称为阶梯效应），附着的粉末颗粒和升高的边缘（边缘效应）的组合，尤其是朝上的倾斜表面的质量不足。在这项工作中，首次详细研究了边缘效应对面朝上的倾斜表面的形貌的影响。此外，在从水平到垂直的整个倾斜范围内，都在朝上的表面上评估了轮廓扫描的效果。发现边缘效应在低倾角的表面上起主要作用，尤其是在使用轮廓扫描时。因此，可以针对每个表面倾斜度确定合适的扫描策略。在目前的研究中，扫描策略的优化可以显着改善倾斜表面的质量。粗糙度轮廓的算术平均高度对于低倾角，R _a可以降低多达52％，对于高倾角，R _a可以降低20％，对于垂直壁，R _a可以降低32％。