Geometry Study on 410NiMo Alloy Parts Printed by WAAM-CMT

Within metallic additive manufacturing, the Wire + Arc Additive Manufacturing (WAAM) method is one of the processes that is of great interest to the industry, based on layer-by-layer deposition. This study aims to present the best deposition parameters of the 410NiMo stainless steel alloy, using the WAAM method, and more specifically the Cold Metal Transfer, taking as a comparison the analysis of the best geometry obtained. The desired geometry in an additive manufacturing process is the one with the largest effective area, that is, with the greatest use of material. For this, depositions of single beads and with 5, 15 and 30 layers were carried out, one continuously and the other deposited in two stages with an intermediate cooling time (15 + 15 layers), varying the parameters between them, followed by analysis of their height and width, in addition to measuring the wettability angle obtained, in order to obtain the part with better geometries. In the case of wall depositions, using the parameters obtained from the analysis of single beads, it was verified that the geometry of the samples varied according to the deposited layers, possibly caused by the low temperature of the substrate, causing the molten material to solidify faster. For samples with 30 layers, the depositions without interruption of the arc, with the deposition in stages were compared, the latter being the strategy that presented a greater height, with a narrower width, generating a better use of material and geometry.