CPC B23K 9/042 (2013.01) [B22F 10/38 (2021.01); B23K 35/0255 (2013.01); B23K 35/3053 (2013.01); C22C 38/00 (2013.01); B23K 2103/04 (2018.08); B33Y 10/00 (2014.12); B33Y 80/00 (2014.12); C21D 2211/005 (2013.01)] | 5 Claims |
1. A method for producing an additively manufactured object, comprising subjecting a weld bead layer formed of a weld bead obtained by melting and solidifying a filler metal made of a mild steel by use of an arc to repeated deposition of the weld bead layer of a next layer,
wherein an interlayer time and a heat input amount are controlled such that when a surface layer temperature of the weld bead layer is within a range of 200° C. to 550° C., the weld bead layer of a next layer is deposited, and
the obtained weld bead layer has a continuous fine ferrite phase having an average grain diameter of 11 μm or less has a Vickers hardness of 130 Hv or more and 178 Hv or less.
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