Metal powder for 3d printer, shaped article, and method for manufacturing shaped article

Abstract

A metal powder for 3D printer includes a plurality of metal particles. A particle size distribution of the plurality of metal particles has a maximum peak within particle diameters of 1 μm to 200 μm. The particle size distribution gives a difference D90−D10 of 10 μm or more between D90 and D10, D90 denoting a particle diameter in which a cumulative percentage is 90% in volume proportion, and D10 denoting a particle diameter in which a cumulative percentage is 10% in volume proportion.

What is claimed is: 
     
         1 . A metal powder for 3D printer, comprising
 a plurality of metal particles, wherein:   a particle size distribution of the plurality of metal particles has a maximum peak within particle diameters of 1 μm to 200 μm; and   the particle size distribution gives a difference D 90 −D 10  of 10 μm or more between D 90  and D 10 , D 90  denoting a particle diameter in which a cumulative percentage is 90% in volume proportion, and D 10  denoting a particle diameter in which a cumulative percentage is 10% in volume proportion.   
     
     
         2 . The metal powder according to  claim 1 , wherein
 the particle size distribution is within 0.1 μm to 300 μm.   
     
     
         3 . The metal powder according to  claim 1 , wherein
 each of the plurality of metal particles contains 50 atom % or more of at least one element selected from the group consisting of tungsten, molybdenum, rhenium, niobium, tantalum, chromium, and vanadium.   
     
     
         4 . The metal powder according to  claim 1 , wherein
 at least one metal particle selected from the group consisting of the plurality of metal particles has sphericity of 90% or more.   
     
     
         5 . The metal powder according to  claim 1 , wherein
 at least one metal particle selected from the group consisting of the plurality of metal particles is a primary particle and has a maximum diameter of 1 μm or more and an aspect ratio of 1.0 or more and 1.5 or less.   
     
     
         6 . The metal powder according to  claim 1 , wherein
 a mass ratio of metal particles having a maximum diameter of 1 μm or more and sphericity of 90% or more, is 0.5 g or more per 10 g of metal particles of the plurality of metal particles.   
     
     
         7 . The metal powder according to  claim 1 , wherein
 a ratio of a bulk density to a true density is 15% or more.   
     
     
         8 . A shaped article, comprising a molding made from the metal powder according to  claim 1 . 
     
     
         9 . The shaped article according to  claim 8 , wherein
 the molding has at least one structure selected from the group consisting of a fin structure, a lattice structure, a plate structure, a column structure, a honeycomb structure, a hollow structure, and a spring structure.   
     
     
         10 . The shaped article according to  claim 8 , wherein
 a density of the molding is 90% or more.   
     
     
         11 . A method for manufacturing a shaped article, comprising
 forming a molding using a 3D printer with the metal powder according to  claim 1 .   
     
     
         12 . The method according to  claim 11 , wherein
 an average density of the molding is 90% or more.