What post-processing procedure can reduce the visibility of an AM part's layer lines?

Abrasive finishing is a post-processing procedure that can effectively reduce the visibility of layer lines on an additive manufacturing part. This technique involves the mechanical removal of material from the surface using abrasive materials, which helps to achieve a smoother finish. By carefully grinding or polishing the surface, the distinct layers built during the additive process become less pronounced, resulting in a more uniform appearance.

In additive manufacturing, layer lines are a natural byproduct of the layer-by-layer build-up of materials. While methods like painting and surface coating can conceal some imperfections, they do not necessarily alter the shape or smooth the topography of the surface to the same extent as abrasive finishing. On the other hand, heat treatment primarily focuses on altering the material properties rather than the surface finish, which means it may not have a significant impact on the visibility of layer lines. Thus, abrasive finishing stands out as a specific and effective method for addressing this aesthetic concern in AM parts.