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High-strength and high-conductivity copper alloy material

A technology of copper alloy and high conductivity, which is applied in the field of copper alloy materials, can solve the problems that the conductivity cannot meet the demand, the connectors are prone to cracks, and the temperature of the material rises, so as to improve the resistance to high temperature softening and avoid the coarsening of material grains Or segregation, fine and uniform metallographic structure

Active Publication Date: 2012-03-28
RAOPING YUEXING COPPER PROCESSING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its conductivity cannot meet the demand
[0006] In the grid connectors, especially the connectors between the high-voltage grid wires and the connectors between the transformer and the high-voltage grid, there are high requirements for the volume resistivity and strength of the material. However, the current grid connectors have high conductivity and their strength Relatively low, oxidation occurs on the contact surface of the connector, which increases the contact resistance and increases the temperature of the material. At the same time, under the action of high pressure, the connector is prone to cracks, especially in the low temperature environment of frost and snow.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example provides an embodiment in which the copper alloy conductor material of the present invention is applied to precision copper parts of a squirrel-cage motor rotor.

[0026] In this embodiment, the copper alloy conductor material applied to the precision copper parts of the motor rotor includes Cu, Cr, and Zr components, and the mass percentages of each component are: Cr: 1.4%, Zr: 0.5%, and the balance is Cu and unavoidable impurities.

[0027] Among the above alloy components, Cr and Zr mainly play the role of aging precipitation strengthening and hindering recrystallization. Adding alloying elements (such as Cr, Zr) whose solubility decreases significantly with the decrease of temperature into copper forms a saturated solid solution through high-temperature solid solution treatment, and then through aging, the supersaturated solid solution is decomposed, and the alloying elements are precipitated in the form of precipitated phases and distributed in a dispe...

Embodiment 2

[0029] The copper alloy conductor material that the present invention is applied to motor rotor conductor comprises Cu, Cr, and Zr composition, and further comprises Zn, Fe, Mg, one or more in Ni, in the present embodiment, each component mass The percentages are: Cr: 1.3%, Zr: 0.4%, Zn: 2.0%, Ni: 0.04%, and the balance is Cu and unavoidable impurities.

[0030] The addition of Zn can adjust the resistivity. Among all the elements that can form a solution with copper, Zn has the least effect on the resistivity, and can be used to adjust the resistance of copper alloys. At the same time, zinc also has obvious solid solution strengthening effects in copper alloys. , it is beneficial to improve the room temperature and high temperature strength of the copper alloy, so that the resistance of the motor rotor conductor can be adjusted, and also ensure the casting performance and tensile strength of the motor rotor conductor.

Embodiment 3

[0032] The present invention is applied to the copper alloy conductor material of motor rotor conductors, connectors of high-voltage power grids, transformer connectors and railway rail electrical connectors, including Cu, Cr, and Zr components, and further includes Zn, Fe, Mg, Ni One or more, in this embodiment, the mass percentage of each component is: Cr: 1.5%, Zr: 0.5%, Fe: 0.08%, Ni: 0.1%, and the balance is Cu and unavoidable impurities.

[0033] Among them, the addition ratio of Fe and Ni is generally about 0.8:1, and their addition can improve the strength of the alloy while maintaining the good plasticity of the alloy. Fe and Ni can also refine the casting structure of the alloy and hinder recrystallization, thereby improving the high temperature performance of the alloy.

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Abstract

Embodiments of the invention disclose a high-strength and high-conductivity copper alloy material, comprising by mass: 1.3%-1.5% of Cr, 0.4%-0.5% of Zr, 30% of Zn, and the balance Cu as well as inevitable impurities. The material can further include one or several of Zn, Fe, Mg and Ni. The material of the invention improves the high temperature softening resistance of products, and can prevent cracking caused by reduced material strength due to temperature rise. While ensuring high high-temperature tensile strength, yield strength and hardness, the material provided in the invention can simultaneously maintain high electroconductivity and heat conductivity.

Description

technical field [0001] The invention relates to a copper alloy material, in particular to a high-strength and high-conductivity copper alloy material. Background technique [0002] With the transformation of electrified railways, the construction of high-speed railways and urban rail transit, the safe operation of electric locomotives has become an important research topic. Due to the frequent stops of electric locomotives, the traction motors are also frequently started. The frequent and huge starting currents cause the temperature rise of the traction motor rotor conductors and catenary components to increase, sometimes as high as 300°C. The material of the motor rotor is currently mainly copper, which softens The temperature is about 250°C. When the temperature rises to 300°C, the strength of the motor rotor material drops sharply, and material cracking is prone to occur, causing shutdown accidents of the traction motor and affecting the safe operation of the electric loc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C9/04
Inventor 佘京鹏陈钢李立鸿李上吉钟敏
Owner RAOPING YUEXING COPPER PROCESSING CO LTD
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