Copper alloy additive manufacturing structure, and method for manufacturing a copper alloy additive manufacturing structure.

Abstract

This invention provides a copper alloy additively fabricated body made of a Cu-Cr-Zr alloy, which has few structural defects such as voids and exhibits high crystal orientation. [Solution] A copper alloy additive body made of a Cu-Cr-Zr alloy, wherein the Cu-Cr-Zr alloy has a Cr content of 0.5 mass% to 1.5 mass%, a Zr content of 0.02 mass% to 0.2 mass%, a nitrogen concentration of 1 masssppm or less, or a hydrogen concentration of 3 masssppm or less, the total amount of additive elements and impurity elements other than the alloying elements of the Cu-Cr-Zr alloy is 0.04 mass% or less, the density of the additive body is 99.1% or more, and as a result of crystal orientation measurement by electron backscatter diffraction, the area ratio of crystals having a plane orientation of {10¹}±15° in a specific direction is 50% or more.

Claims

1. A copper alloy additively fabricated body made of a Cu-Cr-Zr alloy, The Cu-Cr-Zr alloy has a Cr content in the range of 0.5% by mass or more and 1.5% by mass or less, and a Zr content in the range of 0.02% by mass or more and 0.2% by mass or less. The nitrogen concentration is set to 1 mass ppm or less. The Cu-Cr-Zr alloy contains additive elements other than alloying elements and impurity elements in total amount to 0.04% by mass or less. The density of the molded object is said to be 99.1% or higher. A copper alloy additively manufactured body characterized in that, as a result of measuring the crystal orientation by electron backscatter diffraction in the sample cross-section of the copper alloy additively manufactured body, the area ratio of crystals having a plane orientation of {10¹} ± 15° in the powder stacking direction in the sample cross-section is 50% or more.

2. A copper alloy additively fabricated body made of a Cu-Cr-Zr alloy, The Cu-Cr-Zr alloy has a Cr content in the range of 0.5% by mass or more and 1.5% by mass or less, and a Zr content in the range of 0.02% by mass or more and 0.2% by mass or less. The hydrogen concentration is said to be 3 mass ppm or less. The Cu-Cr-Zr alloy contains additive elements other than alloying elements and impurity elements in total amount to 0.04% by mass or less. The density of the molded object is said to be 99.1% or higher. A copper alloy additively manufactured body characterized in that, as a result of measuring the crystal orientation by electron backscatter diffraction in the sample cross-section of the copper alloy additively manufactured body, the area ratio of crystals having a plane orientation of {10¹} ± 15° in the powder stacking direction in the sample cross-section is 50% or more.

3. The copper alloy additive body according to claim 1 or 2, characterized in that the oxygen concentration is 300 mass ppm or less.

4. The copper alloy additive body according to claim 1 or 2, characterized in that, as a result of measuring the crystal orientation by electron backscatter diffraction in the sample cross-section of the copper alloy additive body, the area ratio of crystals having a plane orientation of {001} ± 15° in a direction parallel to the sample cross-section and perpendicular to the powder layering direction is 66.4% or more in the sample cross-section.

5. The copper alloy additive body according to claim 1 or 2, characterized in that its conductivity is 50% IACS or higher.

6. A powder bed forming step in which a powder bed containing copper alloy powder for metal AM is formed, A process of forming a molding bed by solidifying the copper alloy powder for metal AM at a predetermined position in the powder bed, A method for manufacturing a copper alloy additive body according to claim 1 or 2, comprising having the following characteristics.

7. The method for manufacturing a copper alloy additive body according to claim 6, characterized by having an aging heat treatment step of maintaining the copper alloy additive body in a range of 400°C to 800°C.

8. The method for manufacturing a copper alloy additive body according to claim 6, characterized by having a solution heat treatment step of maintaining the copper alloy additive body in a range of 900°C to 980°C.

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