Copper alloy contact wire and method of producing the same

Abstract

The invention provides copper alloy contact lines and a preparation method thereof, wherein, the method includes the following steps: (1) preparing master alloy powders of Cu-AI, in which 0.21-0.53wt% is the content of AI, and the rest is copper; (2) using the master alloy powders of Cu-AI obtained from step (1) to prepare an oxygen source of Al2O3-Cu2O, in which the weight ratio of Cu and AI keeps unchanged; (3) mixing the master alloy powders of Cu-AI obtained from step (1) and the oxygen source of Al2O3-Cu2O obtained in step (2), wherein, the weight ratio of the oxygen source of Al2O3-Cu2O in the mixture is 10-25wt%; (4) carrying out internal oxidation and reduction treatment for the mixture obtained in step (3), so as to obtain alloy powders of Cu-Al2O3, in which the content of Al2 O3 is 0.4-1.0wt%; (5) suppressing the alloy powders of Cu-Al2O3 obtained in step (4) into billets and then carrying out sintering treatment; (6) molding the suppressed and sintered billets obtained in step (5) into bars; (7) making the bars obtained in step (6) into contact lines with required section size by drawing. The copper alloy contact lines prepared by the method present good conductivity, high mechanical strength and softening temperature, good performance of friction and abrasion resistance.

Description

technical field [0001] The present invention relates to a kind of copper alloy contact wire and its preparation method, more specifically, relates to the Al alloy used as high-speed railway contact wire 2 o 3 Dispersion strengthened copper alloy contact wire and its preparation method. Background technique [0002] The electrified railway catenary is composed of contact wires, catenary cables and suspension rings. The contact wire is a key component to ensure the normal operation of the electrified railway. It transmits electric energy from the traction substation to the electric power through direct contact with the pantograph slide plate of the electric locomotive and sliding friction locomotive. With the development of high-speed and heavy-duty electrified trains, higher requirements are put forward for the material and performance of the catenary: increase the suspension tension of the catenary, improve the stability of the catenary, the speed of wave propagation, and ...

AI Technical Summary

Problems solved by technology

The traditional methods to improve the strength of copper alloys are: strain hardening, solid solution strengthening and precipitation strengthening, but because the metal will recrystallize at high temperature, the second phase will coarsen and dissolve, and the intermetallic compound will grow, and the solid solution strengthening will The conductivity of the material is greatly reduced, so using the above strengthening methods, the strength of the material can be improved to varying degrees at room temperature, but at high temperatures, all the above strengthening methods will fail

The main problems faced by traditional strengthening methods: (a) the limit matching of tensile strength and electrical conductivity; (b) the stability of high temperature performance; (c) the resulting friction and wear life under high-speed current-carrying conditions

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