Powder Layer Density
The powder packing density indicates how densely the applied powder is arranged in the build area before the melting process. Too high a density can lead to porosity and poor sintering or melting behavior.
Physical-Chemical Mechanism of Action
The powder deposition density affects the deformation and contact between powder particles. High density increases pressure resistance, which can lead to better sintering. However, it can also cause porosity if particles do not fit well.
Metallurgical Relevance & Welding Risks
Too high a powder deposition density can lead to increased porosity in the component. This can impair the mechanical behavior and toughness of the material. Additionally, it can result in poor sintering or melting behavior, leading to reduced strength and density.
Workshop Practice & Action Instructions
The powder deposition density should be in the range of 1.5 g/cm³ to 2.0 g/cm³ in the build space. More precise control can be achieved by using pressure agents or adjusting the deposition height. If the density is too high, the powder particles should be finer or the deposition volume reduced.