A kind of high-strength and high-conductivity cucrzrmg series copper alloy wire material and preparation method thereof

Abstract

The invention discloses a high-strength and high-conductivity CuCrZrMg series copper alloy wire. The high-strength and high-conductivity CuCrZrMg series copper alloy wire comprises the following components in percentage by mass: 1.5-15.0% of Cr, 0.1-2.5% of Zr, 0.05-1.0% of Mg and the balance being copper and inevitable impurities. In addition, the invention also discloses a preparation method ofthe high-strength and high-conductivity CuCrZrMg series copper alloy wire. The preparation method comprises the following steps: step one. carrying out fusion casting to obtain an ingot casting; steptwo. carrying out surface treatment and homogenization treatment on the ingot casting; step three. carrying out cold forging to obtain a bar, and then carrying out cold rotary forging to obtain a wire bar; and step four. drawing the wire bar to obtain the wire, and carrying out ageing treatment on the wire. The high-strength and high-conductivity CuCrZrMg series copper alloy wire has the beneficial effects that the wire is reasonable in design of the alloy components, high in alloying degree, appropriate in production cost, controllable in technology and environmentally-friendly and has highalloy strength and high electrical conductivity; and the high tensile strength and the high electrical conductivity can meet the requirements of high current connectors, electric power, machinery andelectronics and the like on high-strength and high-conductivity materials.

Description

technical field [0001] The invention belongs to the technical field of copper alloys, and in particular relates to a high-strength and high-conductivity copper CuCrZrMg series alloy rod and a preparation method thereof. Background technique [0002] As a representative of high-strength and high-conductivity alloys, copper-chromium-zirconium alloys have been widely used in various sectors of the national economy, such as high-current connectors, electric power, and mechanical electronics. They have also become the focus of copper and alloy research and production departments. Cu-Cr-Zr alloys are structural and functional materials with comprehensive physical and mechanical properties. They have certain strength, good electrical and thermal conductivity and corrosion resistance. They are suitable for nuclear equipment, integrated circuit lead frames, high-speed railways, Resistance welding and continuous casting and other fields, especially the main products of lead frames for...

AI Technical Summary

Problems solved by technology

[0003] At present, the research on Cu-Cr-Zr alloys mainly focuses on three aspects: (1) Low Cr series (Cr content is less than 1.2%), the electrical conductivity reaches 70% IACS ~ 80% IACS, but the alloy strength is low, only About 500MPa; (2) Large-scale production of non-vacuum atmosphere improves production efficiency, but increases the gas content of the ingot, reduces the quality of the ingot, and affects the elasticity and electrical properties of the material; (3) Microalloys such as rare earths The transformation is mainly concentrated in the low-Cr series of Cu-Cr-Zr alloys, which have an effect on performance improvement but to a small extent

[0004] The disclosed invention patent CN201210567822.9 simplifies the preparation and processing technology of age-strengthened low-alloyed (Cr content is 0.15-0.6%) Cu-Cr-Zr-X alloy wire rod, and the alloy ultra-fine wire rod prepared by it has a strength of 430- 690MPa, can only meet the needs of modern high-speed railways, low-speed and heavy-duty catenaries, etc., and cannot meet the requirements for the strength of alloy wire rods for further speed-up of high-speed railways; CN201610401790.3 passed Cu-Cr with a Cr content of 0.5 to 1.2%. -Zr rare earth element modification and smelting process improvement and other means to optimize the design of material composition, break through the conflicting relationship between strength and conductivity, and significantly improve the conductivity while ensuring the high strength of the end ring of the bar, but the highest tensile strength is only 502MPa

CN201610074956.5 adopts continuous solid solution + quenching device and process to process Cu-Cr-Zr alloy rods or wires, which has a high degree of automation and high production efficiency, and is conducive to ensuring the uniformity and consistency of quenching quality of alloy rods or wires. Mention the specific composition of the alloy and the tensile strength and electrical conductivity of the finished wire rod; CN200810235978.0 is mainly through inert gas protection smelting, plate rolling, different content, different types of trace elements (Ni, Si, Ti), to change The performance of the alloy, especially the alloy sheet with superior comprehensive performance can be obtained by adding an appropriate amount of Si or Ti elements, but the maximum tensile strength of the sheet is 603MPa, the electrical conductivity is 77% IACS, and the tensile strength has not been greatly improved