Preparation method of copper and magnesium alloy contact wire for railway electrification

Abstract

A copper and magnesium alloy contact wire for railway electrification comprises a copper base and alloy metal, wherein the alloy metal comprises components in percentage by weight as follows: 0.5-0.6% of magnesium, 0.012-0.014% of zirconium, 0.012-0.014% of niobium, 0.005-0.008% of titanium and 0.02-0.04% of misch metal. A preparation technology adopts an upward continuous casting extrusion-cold rolling-stretching technology. The oxygen content of the prepared contact wire reaches an oxygen-free copper level, the grain is fine, the mechanical property is remarkably improved, the contact wire is uniform in a length direction, the flatness is good, the locomotive picking-up performance is good, the tensile strength, the elongation percentage, the grain size and the toughness are greatly improved when the copper and magnesium alloy contact wire is compared with a conventional wire, and the copper and magnesium alloy contact wire has wide popularization and application values in the high-speed railway electrification field.

Description

technical field

[0001] The invention relates to the field of wires, in particular to a method for preparing a copper-magnesium alloy contact wire for railway electrification. Background technique

[0002] In order to meet the needs of high-speed economic development, my country's electrified railway is developing towards high-speed and heavy-duty. The country also regards the construction of high-speed railway as a key project in the "Twelfth Five-Year Plan", which puts forward higher requirements for the quality of contact wires. Require. The contact wire transmits electric energy to the electric locomotive through contact with the pantograph of the electric locomotive. It is one of the key components to ensure the normal operation of the electrified railway. It has high mechanical strength, high anti-softening temperature and wear resistance. Due to the limitations of domestic traditional production technology, domestic contact wires have low strength, poor straightness, ...