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Preparation process of tissue-controllable high-aluminum-content Cu-Al2O3 nano dispersion 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: 2019-01-15
湖南高创科惟新材料股份有限公司
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  • Summary
  • 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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  • Preparation process of tissue-controllable high-aluminum-content Cu-Al2O3 nano dispersion 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 oxidant, 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 copper sheat...

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 oxidizing agent, 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 coppe...

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Abstract

The invention discloses a preparation process of a tissue-controllable high-aluminum-content Cu-Al2O3 nano dispersion copper alloy. According to the preparation process, the Cu-Al2O3 nano dispersion copper alloy is prepared by performing ball milling activation and two-stage internal oxidation on Cu-Al alloy powder of which the Al content is 0.5 to 1.0 percent by weight; the tensile strength of the Cu-Al2O3 nano dispersion copper alloy at room temperature is larger than or equal to 550Mpa, the elongation rate is larger than 20 percent, and the electric conductivity is larger than 78 percent IACS; when the Cu-Al2O3 nano dispersion copper alloy is tensioned at a temperature of 700 DEG C, the tensile strength is larger than or equal to 245MPa. The preparation process is reasonable, and is convenient to operate, the formation of Al2O3 particles which are distributed continuously or densely along a crystal boundary in a high-temperature internal oxidation process can be effectively avoided;a prepared material has the advantages of high electric conductivity and high room temperature and high-temperature strength and elongation rate, so that the prepared Cu-Al2O3 nano dispersion copperalloy has superior performance, high strength and high electric conductivity. Thus, urgently needed raw materials are provided for the assembly of spot-welding electrodes, electrovacuum devices and high-voltage direct-current relays on an automatic welding production line in industries such as electronics, appliances, electric vacuum, batteries and new energy automobiles, and the preparation process 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 Applications(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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