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

Patent metadata

Field	Value
Publication number	US-2021069781-A1
Application number	US-202016951304-A
Country	US
Kind code	A1
Filing date	Nov 18, 2020
Priority date	May 30, 2018
Publication date	Mar 11, 2021
Grant date	—

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.

First claim

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.

Assignees

• Toshiba Kk
• Toshiba Materials Co Ltd

Inventors

• Mizobe Masanori
• Yamamoto Shinichi
• Ino Tadashi
• Tanaka Tooru
• Nakano Hideshi

Classifications

• B22F1/052 Primary

  characterised by a mixture of particles of different sizes or by the particle size distribution · CPC title

• B22F1/065

  Spherical particles · CPC title

• B22F10/28 Primary

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title

• B22F10/36

  of energy beam parameters · CPC title

• Y02P10/25

  Process efficiency · CPC title