Metal powder, method of producing additively-manufactured article, and additively-manufactured article

Patent metadata

Field	Value
Publication number	US-10843260-B2
Application number	US-201615151693-A
Country	US
Kind code	B2
Filing date	May 11, 2016
Priority date	May 13, 2015
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

A metal powder contains not less than 0.10 mass % and not more than 1.00 mass % of at least one of chromium and silicon, and a balance of copper. The total content of the chromium and the silicon is not more than 1.00 mass %. In accordance with an additive manufacturing method for this metal powder, an additively-manufactured article made from a copper alloy is provided. The additively-manufactured article has both an adequate mechanical strength and an adequate electrical conductivity.

First claim

What is claimed is:

1. A method of producing an additively-manufactured article, the method comprising:
a first step of forming a powder layer consisting of a copper alloy powder, the copper alloy powder consisting of not less than 0.10 mass % and not more than 1.00 mass % of at least one of chromium and silicon, a total content of the chromium and the silicon being not more than 1.00 mass %, and a balance of copper, an element besides the copper, the chromium, and the silicon being less than 0.10 mass %; and
a second step of forming a shaped layer by melting and/or sintering the copper alloy powder so that metal particles included in the copper alloy powder fuse directly to each other at a predetermined position in the powder layer,
the first step and the second step being successively repeated to stack the shaped layers and produce an additively-manufactured article.

2. The method of producing an additively-manufactured article according to claim 1 , further comprising a heat treatment step of heat-treating the additively-manufactured article.

3. The method of producing an additively-manufactured article according to claim 1 , wherein the copper alloy powder comprises more than 0.51 mass % and not more than 0.94 mass % of chromium; and a balance of copper.

4. The method of producing an additively-manufactured article according to claim 1 , wherein in the second step, the copper alloy powder is melted and/or sintered by irradiating the copper alloy powder with at least one selected from the group consisting of a laser, an electron beam and plasma.

5. A method of producing an additively-manufactured article, the method comprising:
a first step of forming a powder layer consisting of a copper alloy powder, the copper alloy powder consisting of not less than 0.22 mass % and not more than 0.94 mass % of chromium, not less than 98.0 mass % of copper, and an impurity element, the impurity element being an element besides the copper and the chromium, the impurity element being less than 0.10 mass %, and
a second step of forming a shaped layer by melting and/or sintering the copper alloy powder so that metal particles included in the copper alloy powder fuse directly to each other at a predetermined position in the powder layer,
the first step and the second step being successively repeated to stack the shaped layers and produce an additively-manufactured article.

6. The method of producing an additively-manufactured article according to claim 5 , wherein the copper alloy powder comprises not less than 98.5 mass % of copper.

7. The method of producing an additively-manufactured article according to claim 5 , wherein the copper alloy powder comprises not less than 99.0 mass % of copper.

8. The method of producing an additively-manufactured article according to claim 5 , wherein the copper alloy powder comprises more than 0.51 mass % and not more than 0.94 mass % of chromium.

9. The method of producing an additively-manufactured article according to claim 5 , wherein in the second step, the copper alloy powder is melted and/or sintered by irradiating the copper alloy powder with at least one selected from the group consisting of a laser, an electron beam and plasma.

Assignees

• Daihen Corp
• Tech Research Institute Of Osaka Prefecture
• Osaka Res Inst Ind Science & Tech

Inventors

• Tsubota Ryusuke
• Tanaka Jyunichi
• Oka Yohei
• Nakamoto Takayuki
• SUGAHARA Takahiro
• Takemura Mamoru
• Uchida Sohei

Classifications

• B22F1/00 Primary

  Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties · CPC title

• B22F1/05

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

• B22F10/80

  Data acquisition or data processing · CPC title

• B22F10/64

  by thermal means (control of energy beam parameters for post heating B22F10/364) · CPC title

• B22F10/32

  of the atmosphere, e.g. composition or pressure in a building chamber · CPC title