Method for preparing high-performance beryllium-copper alloy through mechanical vibration treatment and high-performance beryllium-copper alloy

A technology of mechanical vibration and beryllium copper alloy, which is applied in the field of metal material processing, can solve the problems of difficulty in effectively improving the performance of beryllium copper alloy, long solid solution time, and coarsening, so as to be suitable for large-scale production and avoid grain coarsening , the effect of uniform dispersion

Active Publication Date: 2021-06-29
NANCHANG HANGKONG UNIVERSITY +1
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AI Technical Summary

Problems solved by technology

As a simple and effective method to improve the properties of alloys, mechanical vibration is often used in the preparation of aluminum alloys and magnesium alloys, but there are few high-performance copper alloys that can be mass-produced using this process.
This is because mechanical vibration can break the dendrites when the alloy is solidified, increase the number of liquid phase nucleation, and easily cause the formation of beryllium, which is the second phase in the beryllium-copper alloy, to nucleate and precipitate, while the beryllium-copper alloy mainly relies on aging heat treatment The precipitation strengthening of beryllium in the process improves the performance of the beryllium-copper alloy. If more beryllium elements form precipitates prematurely, it is easy to coarsen the grains of the beryllium-copper alloy in the subsequent heat treatment process and reduce the performance of the beryllium-copper alloy; and even if it can be passed Solution treatment makes the precipitated phase in the ingot redissolve, but the solution time is longer, which not only increases the production cost, but also tends to cause the grain growth and coarsening of the copper matrix after a long period of solution treatment, making it difficult to effectively Improving the Properties of Beryllium Copper Alloys
After searching the literature of the prior art, it was found that although the invention patent with the publication number "CN102181744A" discloses a high-performance beryllium-copper alloy and its preparation method, it is formed in the casting device by vibrating the metal mold during casting, but it does not It records how to set the mechanical vibration parameters to obtain high-performance beryllium copper alloy, and the follow-up still needs to undergo a long-term solution treatment for at least 5 hours, and the production cost is high

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  • Method for preparing high-performance beryllium-copper alloy through mechanical vibration treatment and high-performance beryllium-copper alloy
  • Method for preparing high-performance beryllium-copper alloy through mechanical vibration treatment and high-performance beryllium-copper alloy
  • Method for preparing high-performance beryllium-copper alloy through mechanical vibration treatment and high-performance beryllium-copper alloy

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preparation example Construction

[0027] The beryllium-copper alloy suitable for the preparation method provided by the invention is preferably a beryllium-copper alloy comprising the following mass percentage components: Co 0.6-1.2%, Ni 1.5-2.0%, Be 0.4-0.7% and the remainder of Cu; more preferably It is: Co 0.7-1.0%, Ni 1.8-2.0%, Be 0.45-0.65%, and the balance Cu.

[0028] In the invention, alloy raw materials are smelted to obtain a melt.

[0029] In the present invention, the alloy raw materials preferably include 0.6-1.2% of pure cobalt sheet, 1.5-2.0% of pure nickel wire, 11.6%-20.3% of beryllium-copper master alloy and the balance of electrolytic Copper; more preferably including 0.7-1.2% of pure cobalt sheet, 1.5-2.0% of pure nickel wire, 13%-18% of beryllium-copper master alloy and the balance of electrolytic copper. The present invention can make the ratio of each element in the beryllium-copper alloy more conducive to improving the performance of the beryllium-copper alloy by regulating the additio...

Embodiment 1

[0053] The method for preparing high-performance beryllium-copper alloy by mechanical vibration treatment in this embodiment is specifically as follows:

[0054] (1) In terms of mass percentage, add 83% electrolytic copper (99.99% purity) into the crucible in the smelting furnace, melt it completely at 1300°C, and then add 0.8 % pure cobalt sheet (purity is 99.99%) and 1.7% pure nickel wire (purity is 99.99%), then add 14.5% Cu-3.8Be master alloy, smelting for 60s, continuously add charcoal powder in the smelting process to prevent Oxidation, to obtain a melt;

[0055] (2) Adjust the temperature of the melt obtained in the step (1) to 1250°C for casting. During the casting, the melt is tilted and paused for 1 second, so that the low-density charcoal powder floats on the surface of the melt and the melt naturally sinks close to the gate. Finally, cast the pure melt into a stainless steel mold under mechanical vibration, and keep the mechanical vibration until the melt is compl...

Embodiment 2

[0061] The method for preparing high-performance beryllium-copper alloy by mechanical vibration treatment in this embodiment is specifically as follows:

[0062] (1) In terms of mass percentage, add 80.1% electrolytic copper (purity: 99.99%) into the crucible in the smelting furnace, melt it completely at 1300°C, and then add 0.8 % pure cobalt sheet (purity is 99.99%) and 1.7% pure nickel wire (purity is 99.99%), then add 17.4% Cu-3.8Be master alloy, smelting for 60s, continuously add charcoal powder in the smelting process to prevent Oxidation, to obtain a melt;

[0063] (2) Adjust the temperature of the melt obtained in the step (1) to 1250°C for casting. During casting, the melt is tilted and paused for 1 second, so that the low-density charcoal powder floats on the surface of the melt and the melt naturally sinks close to the pouring After the mouth, the pure melt is cast into a stainless steel mold under mechanical vibration, and the mechanical vibration is maintained un...

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Abstract

The invention provides a method for preparing a high-performance beryllium-copper alloy through mechanical vibration treatment and the high-performance beryllium-copper alloy, and belongs to the field of metal material machining. The method comprises the following steps that (1) alloy raw materials are smelted, and melt is obtained; (2) the melt obtained in the step (1) is poured into a mold in mechanical vibration, and mechanical vibration is kept until the melt is completely solidified to obtain a beryllium copper alloy cast ingot; the amplitude of mechanical vibration is 1-4 mm, and the frequency of the mechanical vibration is 25-75 Hz; and (3) the beryllium-copper alloy ingot obtained in the step (2) is sequentially subjected to solution treatment and graded aging treatment, and the high-performance beryllium-copper alloy is obtained; the temperature of the solution treatment is 920-950 DEG C, and the time of the solution treatment is 0.8-1.2 h. The method is simple in technology, low in production cost and relatively low in requirements on smelting equipment, and the beryllium-copper alloy prepared by the method is excellent in mechanical property and high in conductivity.

Description

technical field [0001] The invention relates to the field of metal material processing, in particular to a method for preparing a high-performance beryllium-copper alloy through mechanical vibration treatment and the high-performance beryllium-copper alloy. Background technique [0002] Beryllium-copper alloy is a copper-based alloy material with beryllium as the main additive element. Its processing method can be forged and cast. After quenching and aging treatment, beryllium-copper alloy has high strength, hardness and elastic limit, and has good stability. Corrosion, wear resistance, fatigue resistance, good electrical and thermal conductivity, no sparks when impacted, etc., its comprehensive performance ranks first among copper alloys. However, although beryllium-copper alloy has many excellent properties, its process is complex, and it is prone to serious problems such as more pores, coarse grains and uneven structure in the casting situation, resulting in low yield of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C9/00C22F1/08B22D27/08
CPCC22C1/03C22C9/00C22F1/08B22D27/08
Inventor 陈乐平方森鹏周全徐勇周水军袁源平
Owner NANCHANG HANGKONG UNIVERSITY
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