High-strength high-conductivity free-cutting copper alloy material and preparation method thereof

Abstract

The invention discloses a high-strength high-conductivity free-cutting copper alloy material and a preparation method thereof. The copper alloy material is characterized by comprising the following chemical components in percentage by weight: 0.6-1.5 percent of Pb, 0.6-1.5 percent of Ni, 0.1-0.5 percent of P, 0.01-0.05 percent of R and the balance of Cu, wherein R is either or both of trace elements, i.e., lanthanum and cerium. The preparation method comprises the steps of smelting, extruding, cleaning, cold working and annealing. The tensile strength of a processed bar product is 550-620MPa, the yield strength is 490-560MPa, the electrical conductivity is more than or equal to 50 percent IACS, the cutting machining performance is 70 percent (compared with 100 percent of HPb63-3), and the elongation percentage is more than or equal to 3 percent. The copper alloy material has the properties of high strength, high conductivity, free cutting and the like, and a production process is nontoxic and environment-friendly, so that the copper alloy material can be used for replacing a beryllium-copper material along with which extremely toxic substances are produced in a production process,.

Description

technical field [0001] The invention relates to a high-strength and high-conductivity free-cutting copper alloy material and a preparation method thereof. The invention belongs to the field of preparation of alloy materials. Background technique [0002] With the continuous development of human society and the rapid development of science and technology, a large number of high-tech precision equipment and instruments have put forward extremely high requirements for the parts used, especially in terms of strength, electrical conductivity and machinability. High service strength determines the wear resistance and mechanical service life of the material, and the electrical conductivity determines the conductivity and heat dissipation of electrical signals when the material is used as a component. The higher the conductivity, the smaller the attenuation effect on electrical signals and the better the heat dissipation performance; the machinability determines whether the materia...

AI Technical Summary

Problems solved by technology

The use strength of beryllium copper material can reach more than 1000MPa, but its electrical conductivity is low, usually less than 20%, and its machinability is not good, which is less than 20% compared with HPb63-3

At the same time, because beryllium is a scarce element and beryllium oxides are highly toxic, only vacuum smelting can be used for smelting, which is complicated, harmful and expensive

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