Metal powder for metal additive manufacturing and molded object produced using said metal powder

Patent metadata

Field	Value
Publication number	US-2020188995-A1
Application number	US-201816348566-A
Country	US
Kind code	A1
Filing date	Jun 21, 2018
Priority date	Sep 29, 2017
Publication date	Jun 18, 2020
Grant date	—

Abstract

A metal powder in which a coating made of one or more types of elements selected from Gd, Ho, Lu, Mo, Nb, Os, Re, Ru, Tb, Tc, Th, Tm, U, V, W, Y, Zr, Cr, Rh, Hf, La, Ce, Pr, Nd, Pm, Sm and Ti is formed on a surface of a copper or copper alloy powder, wherein a thickness of the coating is 5 nm or more and 500 nm or less. A metal powder for metal additive manufacturing based on the laser method which can be efficiently melted with a laser while maintaining the high conductivity of copper or copper alloy, and a molded object produced by using such metal powder are provided.

First claim

1 . A metal powder in which a coating made of one or more types of elements selected from Gd, Ho, Lu, Mo, Nb, Os, Re, Ru, Tb, Tc, Th, Tm, U, V, W, Y, Zr, Cr, Rh, Hf, La, Ce, Pr, Nd, Pm, Sm and Ti is formed on a surface of a copper or copper alloy powder, wherein a thickness of the coating is 5 nm or more and 500 nm or less.

2 . The metal powder according to claim 1 , wherein a grain size d 50 of the copper or copper alloy powder is 20 μm or more and 100 μm or less.

3 . The metal powder according to claim 2 , wherein an oxygen concentration of the copper or copper alloy powder is 1000 wtppm or less.

4 . A metal laminate molded object produced by using the metal powder according to claim 1 , wherein a conductivity of the metal laminate molded object is 90% IACS or higher.

5 . The metal laminate molded object according to claim 4 , wherein a relative density of the metal laminate molded object is 97% or higher.

6 . The metal powder according to claim 1 , wherein an oxygen concentration of the copper or copper alloy powder is 1000 wtppm or less.

Assignees

• Jx Nippon Mining & Metals Corp

Inventors

• Shibuya Yoshitaka
• Sato Kenji

Classifications

• B22F10/20

  Direct sintering or melting · CPC title

• B22F12/41

  characterised by the type, e.g. laser or electron beam · CPC title

• B22F10/34

  of powder characteristics, e.g. density, oxidation or flowability · CPC title

• B22F1/05 Primary

  Metallic powder characterised by the size or surface area of the particles · CPC title

• B22F1/17

  Metallic particles coated with metal · CPC title