CPC B22F 10/18 (2021.01) [B22F 1/05 (2022.01); B22F 1/105 (2022.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 40/20 (2020.01); B33Y 70/00 (2014.12); C09D 11/38 (2013.01); B22F 2304/10 (2013.01)] | 5 Claims |
1. A powdery composition for 3D printing, comprising:
a metal powder;
a multifunctional carboxylic acid salt powder that reacts with water to form a metal-chelate bridge with the surfaces of at least two adjacent metal powders for bonding between the metal powders, and
an alkali metal salt additive that strengthens the bond between metal powders,
wherein the metal powder and the multifunctional carboxylic acid salt powder are mixed in a weight ratio of 90:10 to 75:25, and
wherein the alkali metal salt additive is included in an amount of 2 to 7 wt. % based on the total weight of the powdery composition.
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