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Cu-Cr in-situ composite with boron, silver and rare earth elements added and preparation method thereof

An in-situ composite material, rare earth element technology, applied in the direction of metal/alloy conductors, etc., can solve the problems of large immiscible gap, limit the preparation and application of new materials, high melting point, and achieve low raw material cost, improved electrical conductivity, and improved cooling. Effects of deformation properties

Inactive Publication Date: 2011-01-19
INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the research on deformed copper-based composite materials mainly focuses on Cu-Nb and Cu-Ag in-situ composite materials, but since Nb and Ag are both noble metals, and the melting point of Nb is as high as 2648 °C, there are large amounts of liquid Cu and Nb. immiscible gap, thus limiting the preparation and application of this class of new materials

Method used

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  • Cu-Cr in-situ composite with boron, silver and rare earth elements added and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Ingredients: According to the chemical composition requirements, 8% of pure Cr, 0.05% of pure Ag, 0.05% of B-containing alloy, 0.01% of rare earth metal Ce, and electrolytic copper that meet the mass percentage of the formula are used as the balance to obtain the ingredients;

[0037] (2) Smelting: Put the prepared ingredients into an intermediate frequency electromagnetic induction furnace, and melt for 25 minutes according to the conventional copper alloy smelting process;

[0038] (3) Casting: pouring molten metal into a graphite mold to obtain an ingot;

[0039] (4) Hot forging or hot rolling: put the above-mentioned cast casting into a heat treatment furnace, heat it to 900°C, keep it warm for 3 hours, and then hot roll it on a conventional hot rolling mill to make it reach 40% deformation;

[0040] (5) Solution treatment: put the hot-rolled alloy into a heat treatment furnace, heat it to 980°C, keep it warm for 1 hour, and then quench it into cold water for ra...

Embodiment 2

[0049] (1) Ingredients: According to the chemical composition requirements, 10% of Cr-containing alloy, 0.05% of pure Ag, 0.05% of B-containing alloy, 0.01% of rare earth element Y, and electrolytic copper that meet the formula mass percentage are used as the balance to obtain the ingredients;

[0050] (2) Smelting: Put the prepared ingredients into an intermediate frequency electromagnetic induction furnace, and melt for 25 minutes according to the conventional copper alloy smelting process;

[0051] (3) Casting: pouring molten metal into a water-cooled steel mold to obtain an ingot;

[0052] (4) Hot forging or hot rolling: put the above-mentioned cast casting into a heat treatment furnace, heat it to 900°C, keep it warm for 3 hours, and then hot roll it on a conventional hot rolling mill to make it reach 40% deformation;

[0053] (5) Solution treatment: put the hot-rolled alloy into a heat treatment furnace, heat it to 980°C, keep it warm for 1 hour, and then quench it into ...

Embodiment 3

[0062] (1) Ingredients: According to the requirements of the chemical composition, 12% of pure Cr, 0.1% of Ag-containing alloy, 0.05% of B-containing alloy, 0.01% of rare earth element La, and electrolytic copper in accordance with the mass percentage of the formula are used as the balance to obtain the ingredients;

[0063] (2) Smelting: Put the prepared ingredients into an intermediate frequency electromagnetic induction furnace, and melt for 25 minutes according to the conventional copper alloy smelting process;

[0064] (3) Casting: pouring molten metal into a graphite mold to obtain an ingot;

[0065] (4) Hot forging or hot rolling: put the above-mentioned cast casting into a heat treatment furnace, heat it to 930°C, keep it warm for 3 hours, and then hot roll it on a conventional hot rolling mill to make it reach 40% deformation;

[0066] (5) Solution treatment: put the hot-rolled alloy into a heat treatment furnace, heat it to 1000°C, keep it warm for 1 hour, and then q...

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Abstract

The invention discloses a Cu-Cr in-situ composite with boron, silver and rare earth elements added and a preparation method thereof. The invention is characterized by adopting multimode comprehensive strengthening technology such as multi-micro alloying, solid solution strengthening, aging strengthening, fine grain strengthening, distortion strengthening, fiber strengthening and the like, using Cu as the base and adding a little Cr and trace Ag and B, rare earth or rare earth compounds to prepare the high performance copper alloy in-situ composite through smelting, casting, hot forging or hotrolling, solid solution treatment, cold rolling or cold drawing, aging and the like. The prepared material has the advantages of high strength, good electric and thermal conductivity, simple preparation process and low cost, thus realizing industrial application in the aspects such as electrician switches, contact materials, resistance electrodes, rotor conductors of large electrical high speed turbine generators, overhead conductors of electric cars and electric trains, lead frames of very large scale integrated circuits and the like.

Description

technical field [0001] The invention relates to a Cu-Cr in-situ composite material added with boron, silver and rare earth elements and a preparation method thereof, belonging to the technical field of nonferrous metal materials. Background technique [0002] With the rapid development of high-tech fields such as electronics, communications, transportation, electric power, aerospace, and precision instruments, the requirements for copper alloys are getting higher and higher. It is required that the copper alloy materials used not only have high strength, high electrical and thermal conductivity, but also have high softening temperature, oxidation resistance, creep resistance, and high pressure resistance. Traditional high-strength and high-conductivity copper alloys have been difficult to meet the requirements. . In recent decades, countries around the world have successively carried out research and development of high-performance copper alloys, which have been applied in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/02C22C9/00C22F1/08
Inventor 陆德平陆磊陈志宝刘克明邹晋胡强康林萍周喆
Owner INST OF APPLIED PHYSICS JIANGXI ACADEMY OF SCI
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