High-strength high conduction copper alloy and its preparation method

Abstract

The invention discloses a high-strength high-conductive copper alloy, which comprises 0.04~0.16 Ag, 0.02~0.4% Zr and copper. The opposite method comprises: melting alloy; solidifying alloy; deformation treating and failure treating. This invention overcomes the conflicting problem for high-strength and high-conductive. The product prolongs service life 3~5 times, has strength 500~600MPa, conductivity more than 80%IACS, softening temperature more than 400Deg, strength reduction rate less than 10% and extension rate more than 5% at 300Deg, and fit to all request for copper alloy.

Description

Technical field [0001] The invention relates to the technical field of copper alloy material and its manufacturing process, and mainly relates to a high-strength and high-conductivity copper alloy and a preparation method thereof. Background technique [0002] Copper alloy materials are mainly used as contact wires for trams and electric locomotives, integrated circuit lead frame materials, conductor materials for high pulse magnetic fields, heat exchange materials and corrosion-resistant parts for coastal power plants, electrodes for various spot welding and seam welding machines, contacts Head materials, commutators for armatures and electric tools, rotor bars for large high-speed turbine generators, linings for high-thrust rocket engines. Therefore, there is a requirement for copper alloy materials to have both high strength and high electrical conductivity. However, copper alloys inherently have contradictory properties of high strength and high electrical conductivity....

AI Technical Summary

Problems solved by technology

The production cost of new high-strength and high-conductivity copper alloys such as in-situ composite materials is high, and the process control is difficult. At present, it is difficult to realize large-scale industrialization, and further research is still needed. The effect is not as remarkable as the composite material method, but it can be directly combined with conventional casting, especially continuous casting technology, which can greatly reduce the production cost of copper alloys. Its products can be used not only as functional materials, but also as structural materials, thus still showing strong Therefore, in order to develop high-strength and high-conductivity copper alloys with good performance, great market potential, low cost and suitable for large-scale production, conventional alloying methods are still the direction of efforts

[0015] At present, the high-strength and high-conductivity copper alloys produced and used by conventional alloying methods still have defects of low strength or low conductivity, and their strength is generally lower than 550MPa, or their conductivity is lower than 80% IACS

For example, the commonly used Cu-Ag alloy has a conductivity of 96% IACS, but its strength is below 400MPa and its strength decreases a lot at high temperature, so the heat resistance of the alloy is poor; the strength of Cu-Cr alloy can reach 500MPa, but its conductivity is generally lower than 80%IACS