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A method for improving the hardness of copper-based multi-element alloy

A multi-element alloy and copper-based technology, applied in the field of metal materials, can solve the problems of deteriorating copper alloy conductivity, limited hardness of copper alloy, cumbersome process, etc., and achieve the effect of eliminating microscopic pores, dispersed distribution, and simple process

Active Publication Date: 2017-11-17
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the addition of trace elements can increase the hardness value of copper alloys, it also deteriorates the electrical conductivity of copper alloys; the use of deformation and heat treatment (solution, aging treatment) methods is cumbersome and costly, and it is still limited to improve the hardness of copper alloys.

Method used

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  • A method for improving the hardness of copper-based multi-element alloy

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Experimental program
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Effect test

Embodiment 1

[0016] The material used is a copper-based multi-element alloy cast by metal mold, and its chemical composition (mass fraction wt%) is: Cr 0.58%, Se 0.720%, Al 0.23%, Te 0.64%, Fe 0.21%, and the balance is Cu. The copper alloy sample was placed on a CS-IB type six-sided top press for high-pressure aging treatment. The pressure was 2GPa, the heating temperature was 480°C, the holding time was 120min, and the power was turned off and the pressure was released to cool to room temperature. The test results of the hardness value are shown in Table 1.

Embodiment 2

[0018] The composition and process of the materials used are the same as in Example 1. In this example, the pressure is 5GPa, the heating temperature is 550°C, the holding time is 60min, and the power is turned off and the pressure is released to cool to room temperature. The test results of the hardness value are shown in Table 1.

Embodiment 3

[0020] The composition and process of the materials used are the same as in Example 1. In this example, the pressure is 3GPa, the heating temperature is 500°C, the holding time is 100min, and the power is turned off and the pressure is released to cool to room temperature. The test results of the hardness value are shown in Table 1.

[0021] Table 1 Hardness test results of copper-based multi-element alloys in different states

[0022]

[0023] Note: Conventional heat treatment (solid solution + aging): solid solution at 950°C for 60 minutes + aging at 470°C for 120 minutes.

[0024] The above experimental results show that the copper-based multi-element alloy has a higher hardness value after being treated by the method of the present invention, which is higher than the hardness value before the embodiment and after the conventional heat treatment process (solid solution+aging).

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Abstract

A method for improving the hardness of copper-based multi-element alloys. The main method is to place the metal-cast copper-based multi-element alloys on a six-sided top press for high-pressure aging treatment. The pressure is 2-5Gpa, the heating temperature is 480-550°C, and the heat preservation After 60-120 minutes, turn off the power and release the pressure to cool down to room temperature. The process of the present invention is simple, easy to control, and stable in performance. The copper-based multi-element alloy treated by the method can obtain a higher hardness value, and the structure is more uniform and dense. Compared with the copper-based multi-element alloy before treatment, the hardness value is improved. About 28.05%; compared with conventional heat treatment, its hardness value increased by about 10.54%.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a method for improving the hardness of copper-based multi-element alloys. Background technique [0002] Copper alloys have been widely used in integrated circuit lead frames, electrodes for resistance welding, armatures, and commutators for electric tools due to their high strength, good electrical conductivity, and thermal conductivity. With the development of science and technology, the demand for high-strength and high-conductivity copper-based multi-component alloys is increasing, and at the same time, higher requirements are put forward for the mechanical properties of this type of copper alloy. Therefore, finding methods to prepare and improve the mechanical properties of such copper alloys has attracted extensive attention. [0003] At present, the methods to improve the hardness of this type of copper alloy are mainly to optimize the alloy composition, deformat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22F1/08
Inventor 常立民刘家福赵翠梅杨春维常龙焦永胜宋婷
Owner JILIN NORMAL UNIV
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