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Method for manufacturing copper-magnesium alloy stranded wire for cold tinned railway

A copper-magnesium alloy and cold tin-plating technology, applied in the field of railway stranded wires, can solve the problems of paralysis of the catenary system, high temperature of the contact point, deterioration of the connection quality, etc. The effect of prolonged rust time

Inactive Publication Date: 2016-07-13
CHANGZHOU YITENG ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corrosion and oxidation will intensify at high temperature, resulting in a vicious circle, further deteriorating the connection quality, and finally causing the contact point temperature to be too high and even accidents such as smoking and burning, resulting in the paralysis of the entire catenary system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of copper-magnesium alloy stranded wire for cold-tinning railway, comprising the following steps:

[0024] (1) Connecting and extruding the copper-magnesium alloy rod and repeatedly drawing it to form a copper-magnesium alloy monofilament blank;

[0025] (2) surface-treating the copper-magnesium alloy monofilament blank; adopting a mixed solution of imidazole compound and sugar alcohol as the surface treatment liquid;

[0026] (3) The copper-magnesium alloy monofilament billet processed by the surface treatment liquid is repeatedly blown and washed;

[0027] (4) pickling the copper-magnesium alloy monofilament blank that step (3) obtains;

[0028] (5) the copper-magnesium alloy monofilament billet that pickling is blown dry is placed in the electroplating bath and carries out electroplating tin;

[0029] (6) Using a wire drawing machine to draw the copper-magnesium alloy monofilament blank multiple times to make a copper-magnesium alloy monofilame...

Embodiment 2

[0039] The difference with embodiment 1 is:

[0040] The concentration of the imidazole compound described in step (2) is 5% by mass.

[0041] The sugar alcohol described in step (2) is sorbitol.

[0042] The concentration of the sugar alcohol described in step (2) is 7% by mass.

[0043] The concentration of the acid described in step (4) is 80% by mass.

[0044] Electroplating solution described in step (5) comprises 170g / L stannous sulfate, 20g / L potassium citrate, 20g / L amphoteric surfactant and 10g / L alkalized tetraisopropylammonium, the pH of described electroplating solution for 8.

[0045] The process of electroplating tin described in step (5) is carried out under the following conditions: the electroplating bath temperature is 30 ℃, and the cathode current density is 20A / dm 2 , Plating time is 20min.

Embodiment 3

[0047] The difference with embodiment 1 is:

[0048] The concentration of the imidazole compound in the step (2) is 2% by mass.

[0049] The sugar alcohol described in step (2) is xylitol.

[0050] The concentration of the sugar alcohol described in step (2) is 4% by mass.

[0051] The concentration of the acid described in step (4) is 40% by mass.

[0052] Electroplating solution described in step (5) comprises 165g / L stannous sulfate, 18g / L potassium citrate, 18g / L amphoteric surfactant and 6g / L alkalized tetraisopropylammonium, the pH of described electroplating solution for 5.

[0053] The process of electroplating tin described in step (5) is carried out under the following conditions: the electroplating bath temperature is 25 ℃, and the cathode current density is 16A / dm 2 , Plating time is 18min.

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PUM

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Abstract

The invention relates to the field of stranded wires for railways, in particular to a method for manufacturing a copper-magnesium alloy stranded wire for a cold tinned railway.The method comprises the following steps that 1, a copper-magnesium alloy rod is connected, extruded and drawn to form a copper-magnesium alloy single-wire blank; 2, the copper-magnesium alloy single-wire blank is subjected to surface treatment; 3, the copper-magnesium alloy single-wire blank treated with surface treatment fluid is subjected to blowing and washing many times; 4, the copper-magnesium alloy single-wire blank obtained in the step 3 is subjected to acid pickling; 5, the copper-magnesium alloy single-wire blank subjected to acid pickling is blow-dried and placed in an electroplate liquid tank for electrotinning; 6, the copper-magnesium alloy single-wire blank is drawn many times through a drawbench, and copper-magnesium alloy single wires of the specified size are manufactured; 7, the copper-magnesium alloy single wires are stranded into the copper-magnesium alloy stranded wire.The production process is simple, the process operation reliability is high, the tinning effect is good, and high corrosion resistance is achieved.

Description

technical field [0001] The invention relates to the field of stranded wires for railways, in particular to a preparation method of copper-magnesium alloy stranded wires for cold-tinned railways. Background technique [0002] With the continuous acceleration of electrified railways and urban rail transit, the requirements for catenary are getting higher and higher. Not only the stranded wires are required to have high tensile strength, but also they are required to have good electrical conductivity to meet the requirements of high-speed electric locomotives. Current load to ensure the speed and safety of train operation. The deflector in contact with the catenary uses a large number of aluminum products. When the copper stranded wire is directly connected to the aluminum conductor, the contact surface of the two metals is very easy to form an electrolyte under the action of moisture, carbon dioxide and other impurities in the air. , thus forming a primary battery with alumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04C25D3/30
CPCB21C37/042C25D3/30
Inventor 邵宇
Owner CHANGZHOU YITENG ELECTRICAL
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