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Low tin-copper alloy contact wire for electric railway and manufacturing method thereof

A technology of electrified railways and tin-copper alloys, which is applied in the direction of cable/conductor manufacturing, electrical components, metal/alloy conductors, etc., can solve the problems of non-compliance with national policies, poor machinability, short service life, etc., and achieve obvious economic value and social value, good processability and low production cost

Active Publication Date: 2010-06-30
沈阳北恒新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, copper-silver alloy contact wires are mainly used to meet the normal speed of electrified railways in China, but because of their high production costs, poor machinability, and short service life, they are no longer in line with the current national policy of building a conservation-oriented society.

Method used

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  • Low tin-copper alloy contact wire for electric railway and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Low tin copper alloy contact wire for electrified railway and its manufacturing method:

[0028] The continuous casting and rolling process is used to produce a low-tin-copper alloy contact wire blank rod with a diameter of Φ28mm. Among them, tin is added to the upper part of the lower flow tank by a quantitative adding device with a diameter of Φ6mm. Finally, the cross section is 2300mm after hot rolling 2 The cast bar is hot-rolled to a Φ28mm billet rod, and the hot working pass can be 4-8 times, the pass processing rate is 18.5% to 23.5% per pass, the total hot working rate is 73.26%, and the hot rolling temperature is 750-830 ℃, the grain size is 0.015~0.018mm, hot rolling has enough to change the as-cast grain size of alloy metal, but it is a good foundation for the subsequent cold working rate to improve the performance index.

[0029] The high-purity cathode copper is put into the vertical melting furnace, the fuel is natural gas, the temperature of the copper liquid...

Embodiment 2

[0033] Put 35 tons of high-purity cathode copper into the vertical melting furnace. When the temperature of the holding furnace rises to 1140℃~1150℃, ensure that the atmosphere in the furnace is slightly reduced and start production. The molten liquid metal flows into the ladle continuously through the lower chute. In the lower chute, the wire feeding method is used to control the weight percentage to add the metal tin wire at 0.097%, and the adding amount is synchronized with the casting speed. Sampling and analysis, after the tin content is qualified, start casting and rolling, the ladle temperature is controlled at 1100~1120℃, the casting speed is 750rpm, the cooling water pressure is 0.08~0.25Mpa, the casting slab is obtained after cooling and solidification, and the casting section is trapezoidal. Section area 2300mm 2 . The cast slab is fed into a rolling mill with a running speed of 750 rpm for continuous rolling four passes, and the rolling temperature is controlled to ...

Embodiment 3

[0035] The continuous casting and rolling process is used to produce a low-tin-copper alloy contact wire blank rod with a diameter of Φ28mm. Among them, tin is added to the upper part of the lower flow tank by a quantitative adding device with a diameter of Φ6mm. Finally, the cross section is 2300mm after hot rolling 2 The cast bar is hot-rolled to a Φ28mm billet rod, the hot working pass is 4-8 times, the pass processing rate is 18.5-23.5%, the total hot working rate is 73.26%, and the hot rolling temperature is 750-830℃. The grain size is 0.015~0.018mm. Hot rolling is enough to change the as-cast grain size of alloy metals, but it provides a good foundation for the subsequent cold working rate to improve performance indicators.

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Abstract

The invention relates to a low tin-copper alloy contact wire for an electric railway, which is a tin-copper alloy comprising the following components in parts by weight percent: 0.06-0.97% of tin, less than or equal to 0.10% of impurities and balance of copper. In the manufacturing method of the invention for protecting the low tin-copper alloy contact wire, cast bars the sectional areas of which are 2300mm<2> are used as initial raw materials, and the cast bars are machined by hot rolling for 4-12 times to obtain intermediate blank rods the diameters of which are 25-32mm; the machining rate in each time is 12-25%; and the low tin-copper alloy contact wire comprises the following materials in parts by weight percent: 0.06-0.97% of tin, less than or equal to 0.10% of impurities and the balance of copper. The low tin-copper alloy contact wire fills up the domestic blank, has excellent comprehensive performance indexes and has better economic value and social value.

Description

Technical field [0001] The invention relates to non-ferrous metal processing design and processing technology, in particular to a low-tin copper alloy contact wire for electrified railways and a manufacturing method thereof. Background technique [0002] Nowadays, my country's electrified railway construction has entered a period of rapid development. At present, copper-silver alloy contact wires are mainly used to meet the ordinary speed of electrified railways in China. However, due to their high production costs, poor workability, and short service life, they no longer meet the current national policy of building a conservation-oriented society. [0003] People expect to obtain a low-tin-copper alloy contact wire for electrified railway and its manufacturing method with better technical effect. Summary of the invention [0004] The object of the present invention is to provide a low-tin copper alloy contact wire for electrified railways and a manufacturing method thereof. [0005...

Claims

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Application Information

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IPC IPC(8): H01B1/02H01B5/02H01B13/00B60B1/12C22C9/02
Inventor 张敏陈绍华逯富君青木明王恒波李玉刚罗兴盛付坚
Owner 沈阳北恒新材料有限公司
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