A method for additive manufacturing of large-scale dispersion-strengthened copper components

Abstract

The invention discloses an additive manufacturing method for a large-scale dispersion-strengthened copper component, comprising the following steps: 1) degreasing, drying and grinding the surface of an aluminum alloy substrate; 2) heat-treating the dispersion-strengthened copper powder for cold spraying; 3) Carry out 3D modeling and transform the 2D plane model; 4) Optimize the movement trajectory of the spray gun for cold spraying; 5) Load the powder into the cold spraying powder feeding tank, and use the cold spraying equipment controlled by the robotic arm to obtain the composite component; 6 ) Machining the composite component to remove the aluminum alloy matrix to obtain a dispersion-strengthened copper component; 7) Putting the dispersion-strengthened copper component into a hydrogen reduction furnace for processing, and finally obtaining the desired dispersion-strengthened copper component. The large-scale and complex dispersion-strengthened copper alloy components can be prepared, and the size and shape of the components are not limited; the preparation process is simple, the powder utilization rate is high, the processing period of the dispersion-strengthened copper alloy is greatly reduced, and the preparation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing of dispersion-strengthened copper components, in particular to an additive manufacturing method of dispersion-strengthened copper components, which is particularly suitable for oxide, tungsten carbide, nitride, boride ceramic phases (Al 2 O 3 , Y 2 O 3 , TiC, TiN, TaC, TaN, TiB 2 ) and other dispersion-strengthened copper preparations. Background technique [0002] Copper and copper alloys have excellent thermal and electrical conductivity, and are widely used in machinery manufacturing, transportation, construction, electrical, electronic and other industrial sectors. However, with the continuous progress of electronic information industries such as microelectronics, computers, communications, and industrial automatic control, higher requirements have been placed on the performance of copper. With good mechanical properties and high thermal stability, traditional copper and copper allo...

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Problems solved by technology

[0006] 1) Limited by the size of the compact or sheath and the hot isostatic pressing equipment, the shape and size of the prepared dispersion-strengthened copper components will be greatly restricted. At present, the domestic dispersed copper products are generally rods And the size is small (the general size is diameter 100mm*length 2000mm), and there are few plate products. For example, the Chinese invention application with the publication number CN 109536771A has prepared a dispersion-strengthened copper plate with a thickness of 1.0-5mm, but it is impossible to prepare a larger-sized plate. Dispersion strengthened copper components;

[0007] 2) During the reaction spray deposition process, the dispersion strengthening phase is easy to coarsen, and it is difficult to play the role of nano strengthening phase;

[0008] 3) Since the oxide has a strong inhibitory effect on the sintering of Cu powder, the material is not easy to achieve high density during sintering, thus affecting the performance of dispersion strengthened copper components;

[0009] 4) The process of mechanical alloying and internal oxidation method is complicated to operate and has a long cycle, making it difficult to realize automatic and large-scale continuous production

[0010] The above problems have greatly hindered the promotion and application of dispersion strengthened copper materials.

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