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Preparation method of Al2O3 dispersion strengthened copper alloy

A technology for dispersion strengthening of copper and alloys, applied in the field of powder metallurgy, can solve the problems of low utilization rate of raw materials, poor product stability, complex process, etc., to improve material utilization rate and yield, high material utilization rate and yield, process Simple process effect

Inactive Publication Date: 2014-07-23
广东省工业技术研究院(广州有色金属研究院)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The whole process has problems such as complex process, low utilization rate of raw materials, high energy consumption, poor product stability and high cost

Method used

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  • Preparation method of Al2O3 dispersion strengthened copper alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Commercially available -100 mesh water atomized CuAl alloy powder (Al mass content: 0.10%) was used as raw material, oxidized at 600 °C for 1 h in oxygen / nitrogen mixed gas and reduced at 900 °C for 1 h in hydrogen to prepare Al 2 o 3 Dispersion-strengthened copper alloy powder; high-speed compression of alloy powder with an impact velocity of 4m / s to prepare a green body; pre-sintering the green body at 800°C in hydrogen for 2 hours, and high-speed recompression with an impact velocity of 10m / s, and finally The composite compact was sintered at 1030°C for 1 h in hydrogen to obtain a dispersion-strengthened copper alloy. Its electrical conductivity is 90%IACS, hardness is 75HRB, and softening temperature is ≥800℃.

Embodiment 2

[0018] Commercially available -100 mesh water atomized CuAl alloy powder (Al mass content: 0.20%) was used as raw material, oxidized at 600 °C for 2 h in oxygen / nitrogen mixed gas and reduced at 800 °C for 2 h in hydrogen to prepare Al 2 o 3 Dispersion-strengthened copper alloy powder; high-speed compression of alloy powder with an impact velocity of 5m / s to prepare a green body; pre-sintering the green body at 900°C in hydrogen for 2 hours, and high-speed recompression with an impact velocity of 15m / s, and finally the complex The compact was sintered at 1030°C for 2h in hydrogen to obtain a dispersion-strengthened copper alloy. Its electrical conductivity is 86%IACS, its hardness is 78HRB, and its softening temperature is ≥900℃.

Embodiment 3

[0020] Commercially available -100 mesh water atomized CuAl alloy powder (Al mass content: 0.30%) was used as raw material, oxidized at 400 °C for 4 h in oxygen / nitrogen mixed gas and reduced at 600 °C for 4 h in hydrogen to prepare Al 2 o 3 Dispersion-strengthened copper alloy powder; the alloy powder is pressed at an impact speed of 5m / s at high speed to prepare a green body; after the green body is pre-sintered at 950°C in hydrogen for 1 hour, the impact speed is 15m / s for high-speed re-pressing, and finally re-pressed The blank was sintered at 1080°C for 1h in hydrogen to obtain a dispersion-strengthened copper alloy. Its electrical conductivity is 80%IACS, hardness is 80HRB, and softening temperature is ≥900℃.

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Abstract

The invention relates to a preparation method of an Al2O3 dispersion strengthened copper alloy and belongs to the technical field of powder metallurgy. The Al2O3 dispersion strengthened copper alloy is prepared through performing internal oxidation and reduction treatment, then pressing the powder at high speed to prepare a green body, pre-sintering in hydrogen, and then performing high-speed re-pressing and re-sintering to prepare the Al2O3 dispersion strengthened copper alloy by taking CuAl alloy powder as a raw material and taking oxygen-nitrogen mixed gas as an oxygen source. Compared with the existing method for preparing a dispersion copper alloy which is mainly based on deformation processing, the preparation method provided by the invention has the advantages of simple process, high material utilization rate, high finished product rate, short process flow, low cost and capability of preparing the dispersion copper alloy with excellent performances, and is suitable for industrial production. As for the dispersion copper alloy prepared by the preparation method provided by the invention, the electric conductivity is 80-90% IACS, the hardness is 75-80HRB, and the softening temperature is not less than 800 DEG C.

Description

technical field [0001] The present invention relates to a kind of preparation method of copper alloy, especially a kind of Al 2 o 3 A method for preparing a dispersion-strengthened copper alloy. It belongs to the technical field of powder metallurgy. Background technique [0002] Al 2 o 3 Dispersion-strengthened copper alloys have outstanding strength at room temperature and high temperature, as well as excellent electrical and thermal conductivity. They are favored in many occasions that require materials to have high electrical conductivity, thermal conductivity and high-temperature strength at the same time. They can be widely used in electricity, electronics, machinery, etc. Industrial fields, such as spot welding electrodes, high-strength power lines, integrated circuit lead frames, etc. Taking spot welding electrodes for automobiles as an example, spot welding electrodes made of dispersed copper alloy have the characteristics of long life (4~10 times that of ordin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/05
Inventor 闫志巧陈峰蔡一湘
Owner 广东省工业技术研究院(广州有色金属研究院)