No 1, Vol. 43, 2020, pages 65-71


I.A. Polozov, E.V. Borisov, V.Sh. Sufiiarov, A.A. Popovich


Additive Manufacturing (AM) of copper and its alloys is a promising way to produce parts with complex geometries without tooling. One of the AM processes is Selective Laser Melting (SLM) technology that uses a laser beam to fuse powder layers to obtain a final part. Laser processing of copper is considered to be a challenging task due to its high thermal conductivity and poor laser absorptivity. In the present work, Cu-Cr-Zr-Ti alloy powder has been utilized in the SLM process to produce bulk samples. SLM process parameters (laser power, scanning speed, hatch distance) have been optimized to achieve almost fully-dense samples with a relative density of about 99.2% and a smooth surface. The obtained bulk samples were used to evaluate the microstructure of the as processes Cu-Cr-Zr-Ti alloy, which consisted of elongated grains with the size of 30 - 250 µm. A test part built using the optimized SLM parameters was 3D-scanned to evaluate the dimension accuracy, which resulted in the average deviation of +88 µm / -81 µm from the CAD-model.

Keywords: Selective Laser Melting, Copper Alloy, Powder Metallurgy

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