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A tissue controllable high aluminum content cu-al 2 o 3 Preparation Technology of Nano-dispersed Copper Alloy

A cu-al2o3, preparation process technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of alloy plastic toughness and impact resistance reduction, and achieve the effect of excellent performance and uniform distribution

Active Publication Date: 2020-09-29
湖南高创科惟新材料股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when preparing dispersion-strengthened copper alloys with high Al content (Al≥0.5wt%), the dispersion-strengthened copper alloys prepared by the internal oxidation method have coarse or continuous Al that preferentially precipitate along the grain boundaries. 2 o 3 Particles, which significantly reduce the plasticity, toughness and impact resistance of the alloy

Method used

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  • A tissue controllable high aluminum content cu-al <sub>2</sub> o <sub>3</sub> Preparation Technology of Nano-dispersed Copper Alloy
  • A tissue controllable high aluminum content cu-al <sub>2</sub> o <sub>3</sub> Preparation Technology of Nano-dispersed Copper Alloy
  • A tissue controllable high aluminum content cu-al <sub>2</sub> o <sub>3</sub> Preparation Technology of Nano-dispersed Copper Alloy

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Experimental program
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Effect test

Embodiment 1

[0050] Al and Cu are smelted at 1200-1230°C to form a Cu-Al alloy melt with an Al content of 0.6wt%. After the melt is purified and impurity removed, high-purity nitrogen is used (the purity of nitrogen is not less than 99.99%) Atomization prepares alloy powder, sieves out particle diameter and is less than 40 mesh alloy powder, it is mixed with oxidant (Cu 2 O) mixing, the amount of oxidant added accounted for 4.8% of the alloy powder mass, the mixture was ball milled for 3 hours, the ball to material ratio was 5:1, the ball milling speed was 200rpm, and the atmosphere was air. Heat the ball-milled material to 380°C in an argon atmosphere and keep it warm for 3 hours to internally oxidize the ball-milled activated alloy powder and oxidant, then continue to heat to 900°C for 3 hours to oxidize and crush until the powder mesh is less than 40 mesh. ℃Hydrogen reduction for 4 hours, cold isostatic pressing of the billet, the argon chamber is wrapped in a pure copper sheath, and th...

Embodiment 2

[0055] Al and Cu are smelted at 1200-1230°C to form a Cu-Al alloy melt with an Al content of 0.8wt%. After the melt is purified and impurity removed, it is prepared by atomizing with high-purity nitrogen (nitrogen purity 99.99%) Alloy powder, sieve the alloy powder with particle size less than 40 mesh, and mix it with oxidant (Cu 2 O) mixing, the amount of oxidant added accounted for 6.36% of the alloy powder mass, the mixture was ball milled for 4 hours, the ball-to-material ratio was 7:1, the ball milling speed was 200rpm, and the atmosphere was air. Heat the ball-milled material to 400°C in an argon atmosphere and keep it warm for 3 hours to internally oxidize the ball-milled activated alloy powder and the oxidizing agent, then continue to heat to 900°C for 3.5 hours to internally oxidize, and crush the powder until the mesh size is less than 40 mesh. Hydrogen reduction at 900°C for 4 hours, cold isostatic pressing of the billet, wrapping in the argon chamber in a pure copp...

Embodiment 3

[0060] Al and Cu are smelted at 1200-1230°C to form a Cu-Al alloy melt with an Al content of 1.0wt%. After the melt is purified and impurity removed, it is atomized with high-purity nitrogen (nitrogen purity 99.99%) Prepare the alloy powder, sieve out the alloy powder with particle size less than 40 mesh, and mix it with oxidant (Cu 2 O) Mixing, the amount of oxidant added accounted for 8% of the alloy powder mass, the mixture was ball milled for 5 hours, the ball to material ratio was 7:1, the ball milling speed was 250rpm, and the atmosphere was air. Heat the argon ball milled material to 400°C in a nitrogen atmosphere and keep it warm for 3.5 hours to internally oxidize the ball-milled activated alloy powder and the oxidant, then continue to heat to 900°C for 4 hours to internally oxidize, and crush the powder until the mesh size is less than 40 mesh. ℃Hydrogen reduction for 4 hours, cold isostatic pressing of the billet, the argon chamber is wrapped in a pure copper sheath...

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Abstract

A kind of microstructure controllable high aluminum content Cu-Al 2 O 3 The preparation process of nano-dispersed copper alloy is prepared from Cu-Al alloy powder with Al content of 0.5wt%-1.0wt% through ball milling activation and two-stage internal oxidation technology. 2 O 3 The room temperature tensile strength of the nano-dispersed copper alloy is greater than or equal to 550MPa, the elongation is greater than 20%, and the electrical conductivity is greater than 78% IACS; when stretched at 700°C. The tensile strength is greater than or equal to 245MPa. The invention has reasonable process and convenient operation, and can effectively avoid the formation of continuous or coarsely distributed Al along the grain boundary during the high temperature internal oxidation process. 2 O 3 particles, the prepared material has high electrical conductivity, good room temperature and high temperature strength and elongation, and obtains high-strength and high-conductivity Cu-Al with excellent performance 2 O 3 Nano-dispersed copper alloy. It provides much-needed raw materials for assembling spot welding electrodes, electric vacuum devices and high-voltage DC relays for automated welding production lines in electronics, electrical appliances, electric vacuum, batteries and new energy vehicles, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation process of a nano-dispersion strengthened copper alloy, in particular to a Cu-Al with a controllable structure and high aluminum content 2 o 3 Preparation process of nano-dispersed copper alloy. Belongs to Al 2 o 3 Dispersion strengthened copper alloy preparation technology field. Background technique [0002] Cu-Al 2 o 3 Nano-dispersion strengthened copper alloy is a new type of structural functional material with excellent comprehensive physical and mechanical properties. It has high strength, high electrical conductivity and good high temperature softening resistance. In developed countries such as Europe and the United States, it has become a key material for electric vacuum devices. In addition, it is widely used in automated welding production lines and assembly spot welding electrodes in industries such as electronics, electrical appliances, electric vacuum, batteries and new energy vehicles. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10C22C32/00C22F1/08
CPCC22C1/05C22C9/00C22C32/0021C22F1/08B22F2998/10B22F2999/00B22F1/145C22C1/0425B22F2009/0824B22F2201/02B22F2009/043B22F2201/50B22F9/04B22F3/04B22F2003/208B22F2003/248
Inventor 李周肖柱邱文婷龚深赵子谦
Owner 湖南高创科惟新材料股份有限公司
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