High-elasticity copper-chromium-zirconium alloy and machining process thereof

Abstract

The invention discloses a high-elastic copper-chromium-zirconium alloy and a processing technology thereof. By improving the strength and elasticity of the copper-chromium-zirconium alloy wire, the electrical conductivity does not decrease significantly, so that it can meet the requirements of high strength, elasticity and electrical conductivity, such as conductive springs. The copper chromium zirconium alloy, its mass percentage is: Cr 0.5~1.2%, Zr 0.05~0.5%, 0.2 <x(x为si、ti两种元素或si、ti、fe三种元素)<1.5%，余量为cu。其中，si、fe元素提高合金强度，ti元素提高合金的弹性性能。该合金经过以下工艺流程：a连铸、b固溶、c轧制、d时效、e拉拔、f成品退火、合金丝材成品。所制备合金的抗拉强度σ_{b can reach 680~780MPa, the plastic elongation δ is 2~6%, the electrical conductivity is 68~75%IACS, and the hardness (Hv) is greater than 165.</x(x为si、ti两种元素或si、ti、fe三种元素)<1.5%，余量为cu。其中，si、fe元素提高合金强度，ti元素提高合金的弹性性能。该合金经过以下工艺流程：a连铸、b固溶、c轧制、d时效、e拉拔、f成品退火、合金丝材成品。所制备合金的抗拉强度σ}

Description

technical field [0001] The invention relates to a highly elastic copper-chromium-zirconium alloy, in particular to a high-elasticity, high-conductivity copper-chromium-zirconium alloy and its processing technology, belonging to the technical field of non-ferrous metal processing. Background technique [0002] Copper-chromium-zirconium alloy has high strength and high conductivity, its tensile strength can reach 560MPa, and its conductivity is greater than 80% IACS, which is a typical aging-strengthened alloy. The alloying principle is that the solid solubility of Cr and Zr alloying elements in copper is high at high temperature, but the solid solubility drops sharply at low temperature, and a precipitation strengthening phase is formed between Cr, Zr and Cu elements, and the alloy strength and electrical conductivity are equal. get improved. However, the elastic properties of copper-chromium-zirconium alloys are low, and the strength decreases rapidly at high temperatures...

AI Technical Summary

Problems solved by technology

However, the elastic properties of copper-chromium-zirconium alloys are low, and the strength decreases rapidly at high temperatures (temperatures greater than 560°C), so it is necessary to add trace elements for alloying improvement

[0003] In order to obtain the best match between strength and conductivity, many institutions at home and abroad have conducted a lot of systematic research on the effect of adding Si, Mg, Ni, Ti, Fe and rare earths on the strength and conductivity of the copper-chromium-zirconium alloy. Research on the influence of the combination of Si+Ti or Si+Ti+Fe on the strength and electrical conductivity of copper-chromium-zirconium alloys, especially no research on the influence of the combination of Si+Ti or Si+Ti+Fe on the elastic properties of the alloy

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