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  5. Influential process parameters

Article | REF: BM7900 V1

Selective laser melting of metallic powder bed

Author: Sébastien PILLOT

Publication date: February 10, 2016 | Lire en français

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    5. Influential process parameters

    The main objectives of laser melting are to manufacture dense parts (typically with porosity rates of less than 1%) with good mechanical properties, close to the specified dimensions and with a good surface finish. To achieve these objectives, there are many parameters that need to be taken into account. Below is a non-exhaustive list of these different parameters.

    5.1 Powder

    The thickness of the deposited layers typically ranges from 20 μm for the thinnest to less than 100 μm for the thickest. The grains of the powders used must have a correspondingly fine particle size distribution. In addition, to ensure good powder bed density before the laser passes through, the powders used have a Gaussian particle size distribution and a grain morphology that is as...

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