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A kind of high-conductivity high-strength copper-iron alloy and preparation method thereof

A copper-iron alloy, high conductivity technology, applied in the direction of conductive materials, conductive materials, metal/alloy conductors, etc., can solve the problems of large Fe precipitate size, uneven distribution, insufficient mechanical properties, etc., to improve alloy strength, tensile strength, etc. Effects of increased strength, elongation at break, and improved electrical conductivity

Active Publication Date: 2022-04-22
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 Fe precipitates in the casting process and the long-term high-temperature heat treatment process, it is difficult to achieve the optimal mechanical properties of the prepared copper-iron alloy, and there are still insufficient mechanical properties.

Method used

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  • A kind of high-conductivity high-strength copper-iron alloy and preparation method thereof
  • A kind of high-conductivity high-strength copper-iron alloy and preparation method thereof
  • A kind of high-conductivity high-strength copper-iron alloy and preparation method thereof

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preparation example Construction

[0031] In a specific embodiment, such as figure 1 , the preparation method of the high-conductivity high-strength copper-iron alloy of the present invention, comprises the following steps: (1) first adopts atomization method to prepare alloy powder; (2) alloy powder is carried out sintering treatment, obtains sintered compact; (3) sintered compact is carried out A single cold working (cold rolling / drawing / cold forging) deformation treatment with a small amount of deformation to obtain a deformed Cu-Fe material; (4) short-term low-temperature aging treatment for the deformed Cu-Fe material; (5) repeat In steps (3) and (4), the total number of deformation-aging treatments reaches more than two times, preferably more than three times, so that the simultaneous improvement of strength and electrical conductivity can be achieved, and a high-conductivity and high-strength copper-iron alloy can be obtained.

[0032] Preferably, the atomization method in step (1) is an air atomization ...

Embodiment 1

[0041] A high-conductivity high-strength copper-iron alloy of the present invention, the Fe content of the copper-iron alloy is 5wt.%, the electrical conductivity is 65% IACS, the tensile strength is 620MPa, the elongation is 25%, and the stress under the condition of 120°C×1000h The relaxation rate is 80%.

[0042] The preparation method of the high-conductivity high-strength Cu-Fe alloy of the present embodiment comprises the following steps:

[0043] (1) The mass percentage of Fe / (Cu+Fe) in the alloy composition is 5%, that is, the Fe content in the required copper-iron alloy is 5wt.% proportioning pure copper block and copper-iron intermediate alloy block; under nitrogen atmosphere , the alloy powder is prepared by gas atomization, the pressure of the gas atomization process is 0.5-0.7MPa, and the melting temperature is 1200°C; (2) The alloy powder is pressed under a pressure of 200MPa to obtain a powder compact; the powder compact is heated in hydrogen Under atmosphere, ...

Embodiment 2

[0045] A high-conductivity and high-strength copper-iron alloy of the present invention, the iron content of the copper-iron alloy is 10wt.%, the electrical conductivity is 63%IACS, the tensile strength is 730MPa, the elongation is 23%, and the stress under the condition of 120°C×1000h The relaxation rate is 82%.

[0046] The preparation method of the high-conductivity high-strength Cu-Fe alloy of the present embodiment comprises the following steps:

[0047] (1) The mass percentage of Fe / (Cu+Fe) in the alloy composition is 10%, that is, the Fe content in the required copper-iron alloy is 10wt.% proportioning pure copper block and copper-iron master alloy block; under nitrogen atmosphere , the alloy powder is prepared by gas atomization, the pressure of the gas atomization process is 0.5-0.7MPa, and the melting temperature is 1200°C; (2) The alloy powder is pressed under a pressure of 200MPa to obtain a powder compact; the powder compact is heated in hydrogen Under atmosphere...

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Abstract

The invention discloses a high-conductivity and high-strength copper-iron alloy and a preparation method thereof. According to the Fe content of 5-25wt.%, and the balance of Cu and unavoidable impurities, the alloy raw material is prepared into alloy powder by an atomization method; the alloy The powder is sintered to obtain a sintered compact; the sintered compact is subjected to cold deformation treatment to obtain a deformed Cu-Fe material; the deformed Cu-Fe material is subjected to aging treatment, and the deformation-aging treatment is performed multiple times to obtain a high-conductivity and high-strength copper-iron alloy. Adopting the method of the present invention to prepare high-conductivity and high-strength copper-iron alloy can solve the problem of uneven distribution of Fe precipitates in high-strength and high-conductivity copper-iron alloys, and can realize the uniform distribution of Fe precipitates in the copper matrix at the submicron level or even nanometer level, and maintain high conductivity of the alloy The strength of the alloy is maximized under the premise of high efficiency, and the fracture elongation and electrical conductivity of the alloy are also improved.

Description

technical field [0001] The invention belongs to the field of copper-iron alloys, in particular to a method for preparing a high-conductivity and high-strength copper-iron alloy. Background technique [0002] Traditional high-strength and high-conductivity copper-iron alloys are usually prepared by a single cold deformation (rolling, drawing or forging, etc.) after casting and a single long-term high-temperature heat treatment. Due to the large size and uneven distribution of Fe precipitates in the casting process and the long-term high-temperature heat treatment process, it is difficult to achieve the optimal mechanical properties of the prepared copper-iron alloy, and there are still problems of insufficient mechanical properties. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a high-conductivity high-strength copper-iron alloy and a preparation method thereof by overcoming the deficiencies and defects mentione...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/04C22F1/08H01B1/02
CPCC22C9/00C22C1/0425C22F1/08H01B1/026B22F2998/10B22F9/082B22F3/02B22F3/1007B22F2003/1051
Inventor 李云平杨标标
Owner CENT SOUTH UNIV