US10421122B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10421122-B2 |
| Application number | US-201715657300-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 24, 2017 |
| Priority date | May 13, 2015 |
| Publication date | Sep 24, 2019 |
| Grant date | Sep 24, 2019 |
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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.
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What is claimed is: 1. An additively-manufactured article made from a copper alloy, the copper alloy 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 %, the additively-manufactured article having a relative density of not less than 96% and not more than 100% with respect to a theoretical density of the copper alloy, and the additively-manufactured article having an electrical conductivity of not less than 26% IACS. 2. The additively-manufactured article according to claim 1 , wherein the copper alloy is a chromium-containing copper alloy comprising: not less than 0.10 mass % and not more than 0.60 mass % of the chromium; and a balance of the copper, the additively-manufactured article has a relative density of not less than 96% and not more than 100% with respect to a theoretical density of the chromium-containing copper alloy, and the additively-manufactured article has an electrical conductivity of not less than 30% IACS. 3. The additively-manufactured article according to claim 1 , wherein the copper alloy is a silicon-containing copper alloy comprising: not less than 0.10 mass % and not more than 0.60 mass % of the silicon; and a balance of the copper, the additively-manufactured article has a relative density of not less than 96% and not more than 100% with respect to a theoretical density of the silicon-containing copper alloy, and the additively-manufactured article has an electrical conductivity of not less than 26% IACS. 4. An additively-manufactured article made from a copper alloy, the copper alloy 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 %. 5. The additively-manufactured article according to claim 4 , wherein the copper alloy comprises more than 0.51 mass % and not more than 0.94 mass % of the chromium. 6. The additively-manufactured article according to claim 4 , wherein the copper alloy comprises not less than 0.22 mass % and not more than 0.51 mass % of the chromium. 7. The additively-manufactured article according to claim 4 , wherein the copper alloy comprises not less than 98.5 mass % of the copper. 8. The additively-manufactured article according to claim 4 , wherein the copper alloy comprises not less than 99.0 mass % of the copper.
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