Hatch Strategy in Powder Bed
Hatching strategy in powder bed: Geometric approach to minimize thermal gradients by line- or island-wise exposure of powder cross-sections. Rotating vectors prevent cumulative distortion.
Physical-Chemical Effect Mechanism
In powder bed fusion, the hatch strategy uses a line- or island-style exposure of powder cross-sections. This minimizes thermal gradients by spreading the heat evenly. Rotating vectors help avoid cumulative distortion and allow the material to cool uniformly.
Metallurgical Relevance & Welding Risks
Uneven cooling can lead to thermal stresses that may cause cracking or distortion. The hatch strategy helps minimize these stresses and improves weld quality.
Workshop Practice & Action Guidelines
Use a line- or island-style exposure method in the powder bed. Make sure the vectors rotate to prevent cumulative distortion. The exact exposure time and intensity depend on the material and welding type. For stiff metals like steel, a careful cooling strategy is especially important.