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A kind of copper-aluminum-manganese alloy and preparation method thereof

A copper-aluminum-manganese and alloy technology, which is applied in the field of non-ferrous metal material preparation, can solve the problems that the strength and plasticity of the alloy cannot be improved at the same time, and achieve the effects of good plasticity, simple production process, and high promotion value

Active Publication Date: 2021-11-05
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that the strength and plasticity of the alloy cannot be simultaneously improved in the prior art, and to provide a high-component copper-aluminum-manganese alloy structure and a preparation method thereof. The copper-manganese-aluminum alloy has higher strength and plasticity, It can meet the requirements of high mechanical properties, corrosion resistance, low cost and high temperature softening resistance when used in industrial equipment

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  • A kind of copper-aluminum-manganese alloy and preparation method thereof
  • A kind of copper-aluminum-manganese alloy and preparation method thereof

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preparation example Construction

[0041] Therefore, the present invention provides a method for preparing a high-composition copper-aluminum-manganese alloy. In the preparation method, the metastable copper-aluminum-manganese alloy is subjected to a composite deformation heat treatment process of critical temperature processing and aging. Through this process, not only can the α phase be precipitated uniformly and dispersedly in the grain, but also the size of the precipitate is small, so as to significantly improve the plasticity of the alloy without reducing the strength of the alloy.

[0042] The preparation method of described copper-aluminum-manganese alloy comprises the following steps:

[0043] 1) Melting is carried out according to the formula of the alloying element to obtain the alloying element liquid;

[0044] 2) face milling after casting the alloying element solution;

[0045] 3) then rolling;

[0046] 4) Then carry out critical temperature deformation treatment;

[0047] 5) Then carry out agi...

Embodiment 1

[0065] The composition of the alloy ingredients of the present invention is: Al: 9.5%, Mn: 11.5%, and the balance is Cu.

[0066] The specific production process of the alloy is: batching→smelting→hot rolling heating→hot rolling→critical warm rolling→aging.

[0067] Melting: First melt the copper, and after the copper is melted, completely cover the liquid surface of the melt with charcoal. Then add electrolytic manganese, the electrolytic manganese should be wrapped with copper foil, and then added to the melt in batches. After the electrolytic manganese is added, the electrolytic manganese bag should be pressed into the liquid surface, so that the electrolytic manganese is completely melted under the liquid surface, and the oxidation of manganese is prevented. Aluminum is then added and the melt is stirred after adding aluminum to prevent localized overheating.

[0068] Hot rolling: the heating temperature of hot rolling is 800°C, and the heating time of hot rolling is abo...

Embodiment 2

[0073] The ingredients of the alloy in the present invention are as follows: Al: 10.5%, Mn: 11.5%, and the balance is Cu.

[0074] The specific production process of the alloy is: batching→smelting→hot rolling heating→hot rolling→critical warm rolling→aging.

[0075] Melting: First melt the copper, and after the copper is melted, completely cover the liquid surface of the melt with charcoal. Then add electrolytic manganese, the electrolytic manganese should be wrapped with copper foil, and then added to the melt in batches. After the electrolytic manganese is added, the electrolytic manganese bag should be pressed into the liquid surface, so that the electrolytic manganese is completely melted under the liquid surface, and the oxidation of manganese is prevented. Aluminum is then added and the melt is stirred after adding aluminum to prevent localized overheating.

[0076] Hot rolling: the heating temperature of hot rolling is 850°C, and the heating time of hot rolling is ab...

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Abstract

The invention relates to the technical field of preparation of non-ferrous metal materials, and discloses a copper-aluminum-manganese alloy and a preparation method thereof. The copper-aluminum-manganese alloy contains chemical elements in the following proportions by mass fraction: Al: 9.5-10.5%, Mn: 11.5% -12.5%, the balance is Cu, and the metallographic structure of the copper-aluminum-manganese alloy includes a metastable β-phase structure and an α-phase dispersedly distributed in the grain. The preparation method of the invention has low requirements on production equipment, does not need a high-temperature solution heat treatment furnace, is simple and energy-saving, and does not need gas protection, which is beneficial to the popularization and application of the method. The produced CuAlMn alloy has a tensile strength of ≥1000MPa, an elongation of ≥12%, and an anti-softening temperature of the alloy exceeding 400°C. The CuAlMn alloy of the present invention can be applied to occasions requiring high strength and plasticity, such as heavy-duty bearing bushes , Wear-resistant and pressure-resistant valve bodies in high-temperature chemical equipment, elastic structural parts in peripheral equipment of nuclear reactors, etc.

Description

technical field [0001] The invention belongs to the field of preparation of nonferrous metal materials, and in particular relates to a copper-aluminum-manganese alloy and a preparation method thereof. Background technique [0002] Copper-aluminum-manganese alloys with low and medium components are widely used in heavy-duty bearings, high-temperature and high-pressure chemical equipment valve bodies and valves because of their high strength, high plasticity, and corrosion resistance. In recent years, with the continuous improvement of the load-carrying capacity of such industrial equipment and the increasingly complex use environment, higher performance requirements have been put forward for copper-aluminum-manganese alloys. It is required to increase the strength of the alloy without losing plasticity, and the alloy has high anti-softening temperature. To improve the strength of the alloy, it is necessary to further increase the content of aluminum and manganese in the allo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/05C22C1/02C22F1/08B23P15/00
CPCB23P15/00C22C1/02C22C9/05C22F1/08
Inventor 魏海根夏福中
Owner JIANGXI UNIV OF SCI & TECH
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