US 11,806,820 B2
Laminated molding and method of manufacturing laminated molding
Shinji Sato, Hyogo (JP); Takeshi Yamada, Hyogo (JP); and Takemasa Yamasaki, Hyogo (JP)
Assigned to KOBE STEEL, LTD., Hyogo (JP)
Filed by KOBE STEEL, LTD., Hyogo (JP)
Filed on Jan. 4, 2022, as Appl. No. 17/646,943.
Application 17/646,943 is a division of application No. 16/646,870, granted, now 11,524,352, previously published as PCT/JP2018/033895, filed on Sep. 12, 2018.
Claims priority of application No. 2017-177691 (JP), filed on Sep. 15, 2017; and application No. 2018-039447 (JP), filed on Mar. 6, 2018.
Prior Publication US 2022/0126388 A1, Apr. 28, 2022
Int. Cl. B23K 9/04 (2006.01); B22F 10/38 (2021.01); C22C 38/00 (2006.01); B33Y 10/00 (2015.01); B23K 35/02 (2006.01); B23K 35/30 (2006.01); B33Y 80/00 (2015.01); B23K 103/04 (2006.01)
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
OG exemplary drawing
 
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.