US 11,724,312 B2
Method for producing three-dimensional molded object
Itaru Matsumoto, Kanagawa (JP)
Assigned to Sodick Co., Ltd., Kanagawa (JP)
Filed by Sodick Co., Ltd., Kanagawa (JP)
Filed on Jun. 17, 2019, as Appl. No. 16/443,013.
Claims priority of application No. 2018-134239 (JP), filed on Jul. 17, 2018.
Prior Publication US 2020/0023436 A1, Jan. 23, 2020
Int. Cl. B33Y 10/00 (2015.01); B22F 10/28 (2021.01); C21D 1/00 (2006.01); B22F 12/30 (2021.01); B22F 10/64 (2021.01); C21D 1/18 (2006.01); C21D 1/26 (2006.01); B22F 3/24 (2006.01); B33Y 40/00 (2020.01); B22F 12/41 (2021.01)
CPC B22F 3/24 (2013.01) [B22F 10/28 (2021.01); B33Y 10/00 (2014.12); C21D 1/00 (2013.01); B22F 10/64 (2021.01); B22F 12/30 (2021.01); B22F 12/41 (2021.01); B22F 2003/248 (2013.01); B22F 2301/35 (2013.01); B33Y 40/00 (2014.12); C21D 1/18 (2013.01); C21D 1/26 (2013.01); C21D 2211/008 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A manufacturing method for a three-dimensional molded object, comprising:
repeating formation of a material layer and formation of a solidified layer, the material layer being formed by spreading a metal material on a base plate and the solidified layer being formed by irradiating the material layer with a laser beam or an electron beam, thereby molding a solidified body which is a laminated solidified layer on the base plate; and
subjecting the base plate and the solidified body after molding to a heat treatment, wherein the base plate is a non-heat treated metal before molding, exhibits the same type of volumetric change of either expansion or shrinkage as the solidified body during the heat treatment, a material of the base plate is different from a material of the solidified body,
the material of the solidified body is martensitic stainless steel,
and the material of the base plate is carbon steel.