Novel high-conductivity free-cutting selenium copper alloy material and preparation method thereof

Abstract

The invention discloses a novel high-conductivity free-cutting selenium copper alloy and a preparation method thereof. The alloy is characterized in that the copper alloy comprises the following chemical components by weight percent: 0.2-0.5% of Se, 0.01-0.05% of R, 0.004-0.012% of P and the balance of Cu, wherein R is at least one or two of trace element La and Ce. The preparation method comprises the following steps: smelting, extruding, cleaning, cold machining and annealing. A rod and wire product processed according to the method is characterized in that the tensile strength is more than or equal to 280Mpa, the conductivity is more than or equal to 88% IACS, the cutting processing property is more than or equal to 85% (compared by taking HPb63-3 as 100%), and the ductility is more than or equal to 15%. The copper alloy material has high-strength, high-conductivity and free-cutting properties and can be used for replacing the American mark C14500 product.

Description

technical field [0001] The invention relates to a novel high-conductivity easy-cutting selenium-copper alloy material and a preparation method thereof. Background technique [0002] With the development of society and the advancement of science and technology, the machinery and equipment used in people's production and life are becoming more and more sophisticated, and the structure is becoming more and more complex. However, most of the electrical parts are still made of copper. In order to meet the precision of the equipment , which puts forward higher requirements for the fineness of the shape processing of these key electrical components. Although ordinary pure copper has good electrical conductivity, its processing performance is not good, and it cannot meet the needs of finishing equipment components. [0003] After World War II, with the widespread application of tellurium, free-cutting copper alloys began to appear. The free-cutting alloy materials represented by C1...

AI Technical Summary

Problems solved by technology

However, as a metal material with scarce reserves and greatly affected by the output of electrolytic copper, tellurium is not only expensive and increases the production cost of alloy materials, but also is greatly affected by the output of electrolytic copper, which seriously restricts its application range and can only be used as a high-end Use of special copper alloys (see "Discussion on C14500 Ingot Production Process" Hu Xiaping, Shanghai Nonferrous Metals, 2003, 24(2), P74-P77)

[0004] In order to solve the problem of huge market demand, high cost and low output of high-conductivity free-cutting copper alloy, the present invention proposes a new type of special copper alloy that can replace C14500 tellurium-copper alloy material. Its conductivity reaches more than 90%, and its machinability is excellent. More than 80% of H63-3, the cost is reduced by 5,000-10,000 yuan / ton compared with C14500, suitable for large-scale production and use

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