US 12,472,578 B2
Additively-manufactured refractory metal component, additive manufacturing process, and powder
Karl-Heinz Leitz, Reutte (AT); Heinrich Kestler, Reutte (AT); Peter Singer, Reutte (AT); Gerhard Leichtfried, Innsbruck (AT); Jakob Braun, Innsbruck (AT); Lukas Kaserer, Innsbruck (AT); and Janko Stajkovic, Innsbruck (AT)
Assigned to Plansee SE, Reutte (AT)
Appl. No. 17/294,845
Filed by PLANSEE SE, Reutte (AT)
PCT Filed Oct. 3, 2019, PCT No. PCT/AT2019/060326
§ 371(c)(1), (2) Date May 18, 2021,
PCT Pub. No. WO2020/102834, PCT Pub. Date May 28, 2020.
Claims priority of application No. A 50191/2018 (AT), filed on Nov. 19, 2018.
Prior Publication US 2022/0016699 A1, Jan. 20, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C22C 32/00 (2006.01); B22F 1/12 (2022.01); B22F 10/28 (2021.01); B22F 10/34 (2021.01); B22F 12/41 (2021.01); B23K 15/00 (2006.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01)
CPC B23K 15/0086 (2013.01) [B22F 1/12 (2022.01); B22F 10/28 (2021.01); B22F 10/34 (2021.01); B22F 12/41 (2021.01); B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); C22C 32/0031 (2013.01); C22C 32/0047 (2013.01); B22F 2207/13 (2013.01); B22F 2301/20 (2013.01); B22F 2304/10 (2013.01)] 13 Claims
 
1. A component, comprising:
a matrix phase composed of at least one material selected from the group consisting of molybdenum, a molybdenum-based alloy, tungsten, a tungsten-based alloy, and a molybdenum-tungsten-based alloy, the component having been manufactured using a laser or electron beam in an additive manufacturing process, the component being formed from powder particles fused selectively by said laser or electron beam to form a solid structure;
a molybdenum content, a tungsten content, or a total content of molybdenum and tungsten being greater than 85 at %;
particulates contained in the component having a melting point above a melting point of the matrix phase, said particulates configured to function as crystallization nuclei for a molten matrix phase to achieve a fine-grained microstructure of the component; and
the component having been manufactured in a build direction in the additive manufacturing process and, in a plane parallel to the build direction, a grain extent parallel to the build direction has an average grain aspect ratio of more than 2 and less than 5.