Industrial production process of high-strength copper-tin alloy contact wire

A technology of copper-tin alloy and production process, which is applied in the direction of metal/alloy conductors, overhead wires, cables, etc., can solve the problem of unstable continuous production of high-strength copper-tin alloy contact wires with large lengths, difficulty in mass production, and difficulty in impurity content. Control and other issues to achieve the effect of realizing large-length continuous batch production, reducing the degree of anti-segregation and high yield

Active Publication Date: 2022-05-13
CHINA RAILWAY CONSTR ELECTRIFICATION BUREAU GRP KANG YUAN NEW MATERIALS CO LTD
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Problems solved by technology

Copper-tin alloy contact wire has the characteristics of high wear resistance, high temperature stability, and relatively easy alloy melting. However, due to the limitation of strength and production technology, it is rare in the application of high-speed railways with a speed of more than 300 kilometers per hour in my country, and the large length Continuous production of high-strength copper-tin alloy contact wires still has the problem of instability
[0003] In addition, there are few reports on the industrial production of high-strength copper-tin alloy contact wires applied at a speed of more than 300 kilometers per hour at home and abroad
Chinese patent CN201410262535.6 proposes to prepare copper-tin alloy contact wire by adding tellurium and rare earth lan

Method used

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  • Industrial production process of high-strength copper-tin alloy contact wire

Examples

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Comparison scheme
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Example Embodiment

[0023] Example 1:

[0024] An industrial production process for high-strength copper-tin alloy contact lines, which includes the following steps:

[0025] Step 1: Double molten ditch three-body melting furnace smelting.

[0026] Add cathode copper plate to the melting area of the three-body melting furnace (the cathode copper plate is not less than No. 1 standard copper), and add dry charcoal as a covering agent, the covering thickness is 120mm, in the insulation area is covered with graphite scales, the coverage thickness is 100mm, the intermediate interval oxygen chamber is covered with dry charcoal, the thickness is 150mm, and the slag and mixing operation are carried out according to the actual working conditions of the smelting, and the tin element and zinc element are added after the furnace condition is stabilized, and the alloy raw material is completely melted, the heat preservation is 10min, so that the elements are mixed evenly, The melting temperature is 1160 °C, the z...

Example Embodiment

[0035] Example 2:

[0036] An industrial production process for high-strength copper-tin alloy contact lines, which includes the following steps:

[0037] Step 1: Double molten ditch three-body melting furnace smelting.

[0038] Add cathode copper plate to the melting area of the three-body melting furnace (the cathode copper plate is not less than No. 1 standard copper), and add dry charcoal as a covering agent, the covering thickness is 120mm, in the insulation area is covered with graphite scales, the coverage thickness is 100mm, the intermediate interval oxygen chamber is covered with dry charcoal, the thickness is 150mm, and the slag and mixing operation are carried out according to the actual working conditions of the smelting, and the tin element and zinc element are added after the furnace condition is stabilized, and the alloy raw material is completely melted, the heat preservation is 10min, so that the elements are mixed evenly, The melting temperature is 1160 °C, the z...

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Abstract

The invention relates to an industrial production process of a high-strength copper-tin alloy contact wire. The industrial production process comprises the following process steps: step 1, smelting in a double-melting-channel three-body smelting furnace; step 2, up-drawing continuous casting; step 3, extruding by a continuous extruder; 4, multi-pass rolling is carried out; and fifthly, cold drawing forming is conducted. The zinc element is added into the copper-tin alloy, so that the fluidity of the alloy is improved, the alloy components are more uniform, the reverse segregation degree of tin is reduced, the mold filling capacity and feeding capacity of the alloy are improved, and looseness is relieved; by controlling parameters of an up-drawing continuous casting and extrusion process, designing a special shape of a roller and applying a cooling cavity of a drawing die, the product quality and the production efficiency are further improved, and a guarantee is provided for batch stable production of the high-strength copper-tin alloy contact wire; according to the technology, large-length continuous stable production can be achieved, the yield is high, the tensile strength of the contact line reaches 520 MPa or above, the electric conductivity is kept at 70% IACS or above, and the application requirement of a high-speed railway with the speed of 300 km or above per hour can be completely met.

Description

technical field [0001] The invention relates to the technical field, in particular to an industrial production process of a high-strength copper-tin alloy contact wire. Background technique [0002] With the continuous development of economy and technology, the electrified railway is moving towards high speed, which puts forward higher requirements for the railway catenary. In order to ensure the safe operation of high-speed trains, contact wires are required to have good electrical conductivity, high strength, wear resistance, and high temperature resistance, as well as long-length, continuous and stable production processes. Copper-tin alloy contact wire has the characteristics of high wear resistance, high temperature stability, and relatively easy alloy melting. However, due to the limitation of strength and production technology, it is rare in the application of high-speed railways with a speed of more than 300 kilometers per hour in my country, and the large length Con...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C9/02B22D11/16B21C37/04H01B1/02H01B9/00H01B13/00B60M1/28
CPCC22C1/02C22C9/02B22D11/004B22D11/16B21C37/04H01B1/026H01B9/008H01B13/0016B60M1/28Y02P10/20
Inventor 彭勇吴晓君花思明于婷路超赵海洋赵德胜杨玉军郭杨杨李颖
Owner CHINA RAILWAY CONSTR ELECTRIFICATION BUREAU GRP KANG YUAN NEW MATERIALS CO LTD
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