Contact line of bronze in use for electrified railroad in high speed, and preparation method

A technology of electrified railways and copper-tin alloys, applied in the direction of cable/conductor manufacturing, other manufacturing equipment/tools, electrical components, etc., can solve problems such as low strength, high temperature resistance, poor corrosion resistance and wear resistance, and achieve uniform composition , Improve the strength, reduce the effect of gas content

Active Publication Date: 2008-08-13
TAIXING SHENGDA COPPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the pure copper and silver-copper alloy contact wires widely used in China have good electrical conductivity, they have low strength, poor high temperature resistance, corrosion resistance and wear resis

Method used

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  • Contact line of bronze in use for electrified railroad in high speed, and preparation method
  • Contact line of bronze in use for electrified railroad in high speed, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Each component is prepared according to the following weight:

[0024] Tin 5000×0.16%×(1+3%)=8.24kg

[0025] Zirconium 5000×0.008%×(1+30%)=0.52kg

[0026] Mixed rare earth 5000×0.01%×(1+20%)=0.6kg

[0027] Copper 5000×(100-0.16-0.007-0.01-0.008-0.01)%=4991.1kg

[0028] Melt 5% of the copper weight in the raw material, that is, 249.6kg, 8.24kg tin, and 0.52kg zirconium into an alloy matrix in a vacuum induction melting furnace, and divide it into 250 equal parts, and each part is mixed with 0.0024kg mixed rare earth and 18.9kg copper. Add it to a power frequency induction furnace with a sealing device, and draw it up according to the above melting and drawing process 15.8mm cast stem. The total weight of the obtained casting rod is 5 tons, and the content of each element is: 0.16% of tin, 0.008% of zirconium, 0.01% of mixed rare earth, and the balance of copper. The cast rod is heated to 300°C in an argon-protected induction furnace and then extruded by a continuou...

Embodiment 2

[0030] Each component is prepared according to the following weight:

[0031] Tin 5000×0.2%×(1+3%)=10.3kg

[0032] Zirconium 5000×0.01%×(1+30%)=0.65kg

[0033] Magnesium 5000×0.009%×(1+20%)=0.54kg

[0034] Mixed rare earth 5000×0.016%×(1+20%)=0.96kg

[0035] Silver 5000×0.01%=0.5kg

[0036] Copper 5000×(100-0.2-0.009-0.01-0.016-0.01)%=4987.8kg

[0037] Melt 8% of the copper weight in the raw material, that is, 399kg with 10.3kg tin, 0.65kg zirconium, 0.54kg magnesium, and 0.5kg silver into an alloy matrix in a vacuum induction melting furnace, and divide it into 400 equal parts, each part with 0.0024kg Add the mixed rare earth and 11.47kg copper into the power frequency induction furnace with a sealing device, and follow the above-mentioned smelting and upward induction process. 16.0mm cast rod. The total weight of the cast rod obtained is 5 tons, and the content of each element is: 0.20% tin, 0.009% magnesium, 0.01% zirconium, 0.016% mixed rare earth, 0.01% silver, and...

Embodiment 3

[0039] Each component is prepared according to the following weight:

[0040] Tin 6000×0.3%×(1+3%)=18.54kg

[0041] Zirconium 6000×0.01%×(1+30%)=0.78kg

[0042] Magnesium 6000×0.007%×(1+20%)=0.504kg

[0043] Mixed rare earth 6000×0.02%×(1+20%)=1.44kg

[0044] Silver 6000×0.007%=0.42kg

[0045] Copper 6000×(100-0.3-0.007-0.01-0.02-0.007)%=5979.36kg

[0046] Melt 10% of the copper weight in the raw material, that is, 598kg with 18.54kg tin, 0.78kg zirconium, 0.504kg magnesium, and 0.42kg silver into an alloy matrix in a vacuum induction melting furnace, and divide it into 600 equal parts, each with 0.0024kg Add the mixed rare earth and 9kg copper into the power frequency induction furnace with a sealing device, and follow the above-mentioned smelting and upward induction process. 17.0mm cast stem. The total weight of the obtained casting rod is 6 tons, and the content of each element is: 0.3% of tin, 0.007% of magnesium, 0.01% of zirconium, 0.02% of mixed rare earth, 0.007...

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Abstract

Contact wire of bronze in use for electric railway in high speed is composed of copper base and additive components. The said components include stannum, zirconium, and mixed rare earths. Weight percentage of each component is as following stannum 0.15-0.35%, zirconium 0.005-0.01%, mixed rare earths 0.005-0.02%. Additive components can also include magnesium and silver. Weight percentage of magnesium is 0.005-0.01%, and weight percentage of silver is 0.01- 0.03%. Advantages are: fine grain, high intensity, good plasticity, and abrasion resistance, tensile strength larger than or equal to 430Mpa, extensibility larger than or equal to 3.5%, grain size smaller than or equal to 0.01mm, resistivity smaller than or equal 0.02250 ohm .mm2/m, tensile strength larger than or equal to 390Mpa at softened 300 deg.C. The contact wire is applicable to electric railway in speed higher than 300 km per hour.

Description

Technical field [0001] The invention relates to a copper-tin alloy contact wire for high-speed electrified railways and a manufacturing method thereof. Background technique [0002] At present, my country's electrified railway is developing at a high speed. From 2006 to 2020, my country will build 12,000 kilometers of railway passenger dedicated lines with a speed of more than 300 kilometers per hour. At the same time, many large and medium-sized cities are planning to develop urban and intercity speeds of more than 250 kilometers per hour. Light rail transit, which puts higher requirements on the contact wire in the electrified railway catenary. The material of the contact wire must not only have good electrical conductivity to meet the high-current load requirements of high-speed electric locomotives, but also require high tensile strength and low linear density to increase the wave propagation speed and adapt to the high-speed operation of locomotives. Its impact and fric...

Claims

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Application Information

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IPC IPC(8): H01B5/02H01B7/10H01B1/02C22C9/02C22C1/02B22D11/00B21C1/00B23P23/04H01B13/00
Inventor 杨吉林张元建卜荣明
Owner TAIXING SHENGDA COPPER IND CO LTD
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