High-strength and high-conductivity copper-chromium-zirconium alloy material and preparation method thereof

Abstract

The invention relates to a high-strength and high-conductivity copper-chromium-zirconium alloy material and a preparation method thereof. The material is composed of, by weight, 0.5-1.5% of Cr, 0.05-0.3% of Zr, 0.02-0.1% of Mg, 0.005-0.01% of Si, 0.002-0.005% of Fe and the balance Cu. The alloy further includes two of the four elements: Ti, La, B and Ca, the content of each element is 0.001-0.005%, and the total content of the alloy elements is 0.005-0.01%. The material is prepared through smelting and casting, hot rolling, face milling, rough rolling, intermediate annealing, intermediate rolling, high-temperature rapid solution treatment, finish rolling and aging treatment. The high-strength and high-conductivity copper-chromium-zirconium alloy material has the tensile strength of 500-800MPa, the yield strength of 350-700 MPa, the elongation of 3-10%, the electrical conductivity of 75-90% IACS and the softening temperature of 500-600 DEG C, the stress relaxation after treatment for 1000 hours at 150 DEG C is smaller than 10%, and the transverse or longitudinal section does not crack after bending by 90 or 180 degrees under the condition: R/t<=1.5. The use requirements of precision plug-in terminals of high-end electronic components for copper alloy materials are completely met.

Description

technical field [0001] The invention relates to a high-strength and high-conductivity copper-chromium-zirconium alloy material and a preparation method thereof, belonging to the field of nonferrous metal processing. Background technique [0002] High-performance copper alloy is an important industrial basic material. It is widely used in the core devices of industrial equipment such as integrated circuits, transportation equipment, aerospace, new energy, electric power, electronic communications, and smart home appliances. It is mainly used in the ultra-large-scale integration of the electronic information industry. Circuit lead frame, USB Type-c interface, new energy vehicle electrical connector, high current connector for electronic equipment, overhead wire for high-speed rail transit, conductor for electronic countermeasure radar and high pulse magnetic field, rotor wire for large high-speed turbine generator Functional conductor devices such as resistance welding electro...

AI Technical Summary

Problems solved by technology

However, since Cr and Zr elements are easily oxidized in a non-vacuum environment, the ingot composition is likely to be uneven during the industrial production process of a large-tonnage non-vacuum environment, which affects the use of alloy materials. At present, the domestic demand for high-end copper-chromium-zirconium products, Mainly rely on imports from Japan, Germany and other developed countries

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