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Powder metallurgy preparation method for aluminum oxide dispersion strengthened copper alloy

A dispersion-strengthened copper and powder metallurgy technology, applied in the field of powder metallurgy, can solve the problems of poor formability of dispersion-strengthened copper powder, high compact density, and difficulty in obtaining it, so as to improve material utilization and yield, and simplify the preparation process , The effect of reducing manufacturing costs

Active Publication Date: 2014-11-12
GUANGDONG INST OF NEW MATERIALS
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  • Summary
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AI Technical Summary

Problems solved by technology

In addition, with Al in the alloy 2 o 3 content increase, Al 2 o 3 The formability of dispersion strengthened copper powder also deteriorates significantly
For Al 2 o 3 For dispersion-strengthened copper powder with a mass content greater than 1%, it is difficult to obtain high compaction density even with high-speed pressing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The commercially available -100 mesh, Al mass content of 0.15% water atomized CuAl alloy powder was used as raw material, and -325 mesh Cu 2 O is an oxidizing agent, and Cu, which is 8.0 times the mass of Al contained in it, is added to the CuAl alloy powder. 2 O powder, after being fully mixed in a V-type mixer, the impact velocity is 7.7m / s, the ratio of impact energy to powder loading is 1246J:20g high-speed pressing mixed powder to prepare green compact, and the green compact is sintered in the atmosphere In the furnace, treat in nitrogen at 900 °C for 1 h and in hydrogen at 1040 °C for 1 h to prepare Al 2 o 3 Dispersion strengthened copper alloys. After testing, its electrical conductivity is 88%IACS, and its hardness is 70HRB.

Embodiment 2

[0022] The commercially available -100 mesh, Al mass content of 0.18% water atomized CuAl alloy powder was used as raw material, and -325 mesh Cu 2 O is an oxidizing agent, and Cu, which is 8.2 times the mass of Al contained in it, is added to the CuAl alloy powder. 2 O powder, after being fully mixed in a V-type mixer, the impact velocity is 7.9m / s, and the ratio of impact energy to powder loading is 1325J:20g high-speed pressing mixed powder to prepare a compact, and the compact is placed in the atmosphere for sintering In the furnace, treat at 900°C for 1h in nitrogen and 1060°C in hydrogen for 1h to prepare Al 2 o 3 Dispersion strengthened copper alloys. After testing, its electrical conductivity is 86%IACS and its hardness is 75HRB.

Embodiment 3

[0024] The commercially available -100 mesh, Al mass content of 0.55% water atomized CuAl alloy powder was used as raw material, and -325 mesh Cu 2 O is an oxidizing agent, and Cu, which is 8.5 times the mass of Al contained in it, is added to the CuAl alloy powder. 2 O powder, after being fully mixed in a V-type mixer, the impact velocity is 8.3m / s, and the ratio of impact energy to powder loading is 1458J:20g high-speed pressing the mixed powder to prepare a compact, and the compact is placed in the atmosphere for sintering In the furnace, treat in nitrogen at 900 °C for 1 h and in hydrogen at 1070 °C for 1 h to prepare Al 2 o 3 Dispersion strengthened copper alloys. After testing, its electrical conductivity is 78%IACS and its hardness is 85HRB.

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Abstract

A powder metallurgy preparation method for an aluminum oxide dispersion strengthened copper alloy is characterized in that CuAl alloy powder and Cu2O powder are mixed uniformly and proportionally, the mixed powder is pressed and formed at a high speed, an obtained compact is arranged in an atmosphere sintering furnace, integral processing of internal oxidation and reduction sintering is conducted in sequence, and the aluminum oxide dispersion strengthened copper alloy is prepared. The powder metallurgy preparation method is simple in technology process, the performance of the prepared alloy is the same as the performance of an alloy prepared through deformation processing methods including hot extrusion and the like, the aluminum oxide dispersion strengthened copper alloy with excellent performance is prepared with low cost through short process, and the powder metallurgy preparation method is suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method of copper alloy, in particular to a powder metallurgy preparation method of aluminum oxide dispersion strengthened copper alloy. It belongs to the technical field of powder metallurgy. Background technique [0002] Al 2 o 3 Dispersion strengthened copper alloy is a kind of structural functional material with excellent comprehensive physical and mechanical properties. It has the advantages of high strength, high electrical conductivity, high thermal conductivity and high wear resistance. It can be widely used in electric power, electronics, machinery and other industries. Fields, such as lead frames for integrated circuits, overhead wires for large electric locomotives, mold linings for continuous casting machines, and resistance welding electrodes. Traditional Al 2 o 3 The preparation process of dispersion strengthened copper alloy is: CuAl alloy + oxygen source (Cu 2 O) → mixing → isostatic pressing ...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C9/00
Inventor 闫志巧陈峰蔡一湘
Owner GUANGDONG INST OF NEW MATERIALS
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