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Method for manufacturing high-conductivity high-ductility copper alloy bus for motor

A copper alloy, high conductivity technology, applied in the direction of cable/conductor manufacturing, circuits, electrical components, etc., can solve the problems of uncontrollable oxygen content, copper bus conductivity, ductility and strength, etc., to achieve the effect of improving toughness

Active Publication Date: 2013-03-27
JIANGYIN ELECTRICAL ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In "Nonferrous Metal Processing", Volume 32, Issue 5, "Development of High-Strength and High-conductivity Copper Busbar", it is mentioned that the traditional production process of copper busbar will make the copper liquid have the opportunity to contact with oxygen during pouring, and the oxygen content cannot be obtained. At the same time, the raw copper contains a large amount of impurities, which has a great impact on the conductivity, ductility and strength of the copper busbar

Method used

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preparation example Construction

[0017] The invention relates to a method for preparing a high-conductivity and high-ductility copper alloy bus bar for a motor. The copper content in the copper alloy bus bar is ≥99.95% by weight, the oxygen content is ≤0.001% by weight, and the indium content is 0.002-0.004% by weight %, the content of lanthanum is 0.003-0.004% by weight, and the balance is unavoidable impurities.

[0018] Indium has a low melting point (156.61°C), high boiling point (2080°C), good conductivity, good ductility, softer than lead, and can be scored with nails; it has strong plasticity and can be pressed into extremely thin metal sheets. Oxide can form a transparent conductive film and other characteristics.

[0019] The lanthanides are usually silvery-white lustrous metals that are relatively soft, malleable, and paramagnetic. The chemical properties of lanthanide elements are relatively active, and they are easy to change the crystal phase when smelting with other metal elements, and at the s...

Embodiment 1

[0021] Step 1. Smelting

[0022] Take 99.96kg of cathode copper, 0.003kg of indium, and 0.004kg of lanthanum, place them in a vacuum melting furnace, heat to 1100°C to form a copper alloy liquid, and cover the surface of the copper alloy liquid with a charcoal layer to keep the copper alloy liquid from oxygen;

[0023] Step 2, upward continuous casting

[0024] The graphite crystallizer is directly inserted into the copper liquid, and the graphite crystallizer is cooled by a water spacer, the copper alloy liquid is condensed into a solid in the graphite crystallizer, and the upper end of the solid is drawn by a drafting mechanism to make a copper alloy rod, which is drawn up and continuously cast When using charcoal for oxygen isolation, water jacket cooling;

[0025] Step three, continuous extrusion

[0026] The copper alloy rod obtained in step 2 is placed in an extruder and continuously extruded into a billet;

[0027] Step 4. Cold drawing

[0028] The blank obtaine...

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Abstract

The invention relates to a method for manufacturing a high-conductivity high-ductility copper alloy bus for a motor. The method is characterized in that the copper alloy bus comprises the following components in percentage by weight: larger than or equal to 99.95% of copper, smaller than or equal to 0.001% of oxygen, 0.002-0.004% of indium, 0.003-0.004% of lanthanum and the balance of unavoidable impurity. The method comprises the following steps of: placing cathode copper and indium and lanthanum rare-earth elements in a vacuum smelting furnace, heating to form a molten copper alloy, and coating a wood charcoal layer on the surface of the molten copper alloy; directly inserting a hollow crystallizer into the molten copper alloy, drawing to manufacture a copper alloy rod by a drawing mechanism, and placing the copper alloy rod in an extruder to continuously extrude to form a blank material, wherein the crystallizer is cooled down by a water spacer bush; and placing the blank material on a drawing machine form drawing molding to obtain the copper alloy bus. The copper alloy bus manufactured by the method disclosed by the invention can meet high strength requirements and also has improved conductivity.

Description

technical field [0001] The invention relates to a copper alloy busbar for a motor, in particular to a preparation method for a high-conductivity and high-ductility copper alloy busbar for a motor. It belongs to the technical field of electrical alloy materials. Background technique [0002] Copper bus bar is used to make motor and electrical winding coils, high and low voltage electrical switch contacts and conductor materials for installation of power supply and distribution equipment. Copper busbars can be divided into soft copper busbars and hard copper busbars according to their uses. In "Nonferrous Metal Processing", Volume 32, Issue 5, "Development of High-Strength and High-conductivity Copper Busbar", it is mentioned that the traditional production process of copper busbar will make the copper liquid have the opportunity to contact with oxygen during pouring, and the oxygen content cannot be obtained. At the same time, the raw copper contains a large amount of impur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00
Inventor 陈希康冯岳军张忠良
Owner JIANGYIN ELECTRICAL ALLOY
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