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Copper alloy with high strength, high conductivity and high plasticity and preparation method thereof

A high-conductivity, high-plasticity technology, applied in the field of alloys, can solve problems such as high strength, high conductivity and high plasticity, achieve good strength and conductivity, and ensure safety and reliability.

Pending Publication Date: 2019-02-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to propose a high-strength, high-conductivity, high-plasticity copper alloy for the problem that current alloys cannot have high strength, high conductivity, and high plasticity. Compared with CuCrZr series alloys, the alloy has the same plasticity. Under the deformation process, the uniform elongation rate is increased by 38% to 80%, achieving high strength, high conductivity and high plasticity at the same time

Method used

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  • Copper alloy with high strength, high conductivity and high plasticity and preparation method thereof
  • Copper alloy with high strength, high conductivity and high plasticity and preparation method thereof
  • Copper alloy with high strength, high conductivity and high plasticity and preparation method thereof

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Embodiment 1

[0029] This embodiment discloses a method for preparing a copper alloy with high strength, high conductivity and high plasticity, including the following steps:

[0030] 1. The electrolytic pure copper is electrolytically polished to remove oxide scale and other surface materials, the raw materials are cleaned with anhydrous ethanol through ultrasonic waves, and dried in a blast drying oven at 50°C for 30 minutes;

[0031] 2. Ingredients, the total weight is 2500g, the mass fraction of Cr is 0.4% (10g), the mass fraction of Zr is 0.2% (5g), the mass fraction of Hf is 0.2% (5g), the mass ratio of Zr to Hf is 1, the Cu particles in the master alloy are 60g, The rest is Cu block (2420g) for weighing ingredients;

[0032] 3. Zr and Hf elements are added to the copper melt in the form of a master alloy, and the master alloy is prepared using a vacuum non-consumable electric arc furnace, where the mass ratio of Cu particles (60g) to the total Zr and Hf raw materials (10g) is 6, repeated S...

Embodiment 2

[0045] This embodiment discloses another method for preparing a copper alloy with high strength, high conductivity and high plasticity, including the following steps:

[0046] 1. The electrolytic pure copper is electrolytically polished to remove oxide scale and other surface materials, the raw materials are cleaned with anhydrous ethanol through ultrasonic waves, and dried in a blast drying oven at 50°C for 30 minutes;

[0047] 2. Ingredients, the total weight is 2500g, the mass fraction of Cr is 0.4% (10g), the mass fraction of Zr is 0.1% (2.5g), the mass fraction of Hf is 0.3% (7.5g), the mass ratio of Zr to Hf is 0.33, Cu particles in the master alloy 60g, the rest is Cu block (2420g) for weighing ingredients;

[0048] 3. Zr and Hf elements are added to the copper melt in the form of a master alloy, and the master alloy is prepared using a vacuum non-consumable electric arc furnace, where the mass ratio of Cu particles (60g) to the total Zr and Hf raw materials (10g) is 6, repeat...

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Abstract

The invention provides a copper alloy with high strength, high conductivity and high plasticity and a preparation method thereof. The copper alloy with high strength, high conductivity and high plasticity comprises, by weight, 0.3-0.6% of Cr, 0.1-0.3% of Zr, 0.1-0.3% of Hf and the balance Cu. The preparation method of the copper alloy with the high strength, the high conductivity and the high plasticity comprises the following steps that a CuZrHf intermediate alloy is prepared by adopting a vacuum non-self-consumption electric-arc furnace; a vacuum medium-frequency induction melting furnace isadopted for preparing the copper alloy with the high strength, the high conductivity and the high plasticity; by means of a secondary charging hopper, Cr sheets are added into the vacuum medium-frequency induction melting furnace; the CuZrHf intermediate alloy is added into a melt, and after pouring is carried out, the copper alloy with the high strength, the high conductivity and the high plasticity is obtained. Compared with a CuCrZr series alloy, under the same plasticity deformation technology, the uniform elongation is improved by 38-80%, and the copper alloy has high strength, high conductivity and high plasticity.

Description

Technical field [0001] The invention relates to alloy technology, in particular to a copper alloy with high strength, high conductivity and high plasticity and a preparation method thereof. Background technique [0002] Copper and copper alloys have high strength and good electrical conductivity, so they are widely used in electrical contacts, high voltage switches, contact wires, integrated circuit lead frames, and resistance welding electrodes. [0003] High strength and high electrical conductivity are essentially contradictory to each other. Increasing the tensile strength of the material will inevitably damage the electrical conductivity of the material. At present, high-strength and high-conductivity copper alloys are generally prepared by large plastic deformation or dynamic plastic deformation. The prepared copper alloys usually have a tensile strength of more than 600 MPa and an electrical conductivity of about 80% IACS, which meets the requirements for high strength and h...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/03C22F1/08
CPCC22C1/03C22C9/00C22F1/08
Inventor 王同敏李仁庚康慧君郭恩宇陈宗宁接金川曹志强卢一平张宇博李廷举
Owner DALIAN UNIV OF TECH
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