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Overhead line and making method thereof

A manufacturing method and overhead wire technology, applied in the direction of overhead wires, metal/alloy conductors, conductors, etc., can solve the problems of increased wear speed of overhead wires, and achieve the effect of excellent wear resistance

Active Publication Date: 2005-05-04
SUMITOMO ELECTRIC IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The arc causes the problem that the wear speed of the overhead wire increases
In the prior art described above, certain required properties as an overhead wire are satisfied in terms of strength and electrical conductivity, but further improvement is required regarding strength and wear resistance.

Method used

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Comparison scheme
Effect test

Embodiment Construction

[0016] Next, the present invention will be described in more detail.

[0017]

[0018] The purpose of making the Sn content greater than 0.5% by mass is to obtain a higher-strength overhead wire material, and the purpose of making the Sn content to be 0.8% by mass or less is to further suppress a decrease in electrical conductivity.

[0019]

[0020] By adding at least one of Ag, In, Sr, Ca, Mg, and Zr to copper, the strength of the copper alloy can be increased, and even if the heat is generated by the arc between the pantograph and the overhead wire, the copper alloy will not be damaged. Softens to improve heat resistance.

[0021] If the total content of the above-mentioned additive elements such as Ag is less than 0.0005% by mass, the effect of increasing the strength and heat resistance will be limited. Furthermore, although Ag has a higher electrical conductivity than copper when present in a metallic form, when Ag is dissolved in a copper alloy, the electrical cond...

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PUM

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Abstract

The present invention provides an overhead wire having sufficient strength and electrical conductivity, and excellent wear resistance, and a manufacturing method thereof. In the trolley wire of the present invention, the Sn content is more than 0.5 mass % and less than 0.8 mass %, the total content of at least one selected from Ag, In, Sr, Ca, Mg and Zr is 0.0005 to 0.3 mass %, and the oxygen content is 0.01 ~0.05% by mass, and the remainder is constituted in the form of Cu and unavoidable impurities. The tensile strength of the overhead wire is above 460N / mm2, and the electrical conductivity is above 60% IACS. Not just high-concentration Sn, but by adding at least one selected from Ag, In, Sr, Ca, and Mg in the above-mentioned specified amount, high tensile strength and high electrical conductivity can be obtained. High wear resistance destructive.

Description

technical field [0001] The present invention relates to an overhead wire and a manufacturing method thereof. In particular, it relates to a trolley wire excellent in strength, electrical conductivity, and wear resistance, and a method of manufacturing the trolley wire to obtain the trolley wire. Background technique [0002] Conventionally, pure copper or a copper alloy containing 0.3% by mass or less of tin has been used as a material constituting a trolley wire for contacting a pantograph of an electric vehicle and supplying electric power to the electric vehicle. [0003] However, the speed of trains has increased in recent years, and it is necessary to increase the tension of the trolley wires. As a technique to meet such a request, Japanese Patent Application Laid-Open No. 6-8759, which was published earlier in the Japanese patent process, has been described. [0004] In this technique, firstly, continuous casting is used to obtain a cast material having an oxygen con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/08B60M1/13C22C9/02C22F1/00H01B1/02H01B5/00
Inventor 久保范明中本稔南条和弘西川太一郎佐野忠德大塚保之
Owner SUMITOMO ELECTRIC IND LTD