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Copper-chromium-calcium alloy with high conductivity and high strength and preparation method thereof

A calcium alloy and high conductivity technology, which is applied in the field of copper-chromium-calcium alloy and its preparation, can solve the problems of difficulty in achieving optimal mechanical properties, decreased electrical conductivity of the alloy, and large Cr precipitated phase size, etc., to achieve process optimization and tensile strength. The effect of lifting and cooling speed is fast

Active Publication Date: 2021-04-16
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the large size and uneven distribution of Cr precipitates in the casting process, it is difficult to achieve the optimal mechanical properties of the alloy after deformation processing, and there are still problems of insufficient mechanical properties.
In addition, in order to achieve a sufficiently high strength, the content of chromium is often high, and the electrical conductivity of the alloy will be significantly reduced, especially after severe plastic deformation

Method used

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  • Copper-chromium-calcium alloy with high conductivity and high strength and preparation method thereof
  • Copper-chromium-calcium alloy with high conductivity and high strength and preparation method thereof
  • Copper-chromium-calcium alloy with high conductivity and high strength and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A high-conductivity high-strength copper-chromium-calcium alloy. The Cr content of the copper-chromium-calcium alloy is 0.25wt.%, the Ca content is 0.10wt.%, and the balance is copper. The electrical conductivity is 92% IACS, and the tensile strength is 550MPa. The elongation is 25%.

[0031] The preparation method of the high-conductivity high-strength Cu-Cr-Ca alloy of the present embodiment comprises the following steps:

[0032](1) According to the mass percentage of Cr / (Cu+Cr+Ca) in the alloy composition is 0.25%, the mass percentage of Ca / (Cu+Cr+Ca) is 0.10%, that is, the chromium content in the required copper-chromium-calcium alloy is 0.25wt.%, the calcium content is 0.10wt.%, and the ratio of pure copper block, copper-chromium master alloy block and copper-calcium master alloy block; under nitrogen atmosphere, the alloy powder is prepared by gas atomization method, and the pressure of the gas atomization process The melting temperature is 0.5-0.7MPa, and the m...

Embodiment 2

[0034] A high-conductivity and high-strength copper-chromium-calcium alloy. The Cr content of the copper-chromium-calcium alloy is 0.50wt.%, the Ca content is 0.10wt.%, and the balance is copper. The electrical conductivity is 91% IACS, and the tensile strength is 620MPa. The elongation was 23%.

[0035] The preparation method of the high-conductivity and high-strength Cu—Cr—Ca alloy of this embodiment is the same as that of Embodiment 1.

Embodiment 3

[0037] A high-conductivity and high-strength copper-chromium-calcium alloy. The Cr content of the copper-chromium-calcium alloy is 1.00wt.%, the Ca content is 0.10wt.%, and the balance is copper. The electrical conductivity is 89% IACS, and the tensile strength is 680MPa. The elongation was 21%.

[0038] The preparation method of the high-conductivity and high-strength Cu—Cr—Ca alloy of this embodiment is the same as that of Embodiment 1.

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Abstract

The invention discloses a copper-chromium-calcium alloy with high conductivity and high strength. The copper-chromium-calcium alloy comprises the following components in percentage by mass: 0.05-10wt% of Cr, 0.01-0.5wt% of Ca and the balance of copper and unavoidable impurities. The invention further provides a preparation method of the copper-chromium-calcium alloy with high conductivity and high strength. According to the copper-chromium-calcium alloy with high conductivity and high strength and the preparation method thereof, chromium and calcium elements are added into traditional copper alloy, the proportion relation among all the elements is optimized, the tensile strength of the copper-chromium-calcium alloy is obviously improved, and the conductivity is slightly reduced.

Description

technical field [0001] The invention belongs to the field of alloy materials, in particular to a copper-chromium-calcium alloy and a preparation method thereof. Background technique [0002] Traditional high-strength and high-conductivity copper-chromium-based alloys are usually prepared by combining methods such as cold rolling and heat treatment after casting. Due to the large size and uneven distribution of Cr precipitates in the casting process, it is difficult to achieve the optimal mechanical properties of the alloy after deformation processing, and there are still problems of insufficient mechanical properties. In addition, in order to achieve high enough strength, the content of chromium element is often too high, and the electrical conductivity of the alloy will be significantly reduced, especially after severe plastic deformation. [0003] How to improve the strength of copper-chromium alloys without reducing the conductivity of the alloy is the key to the researc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/04C22F1/08
Inventor 李云平杨标标
Owner CENT SOUTH UNIV
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