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 strength

Active Publication Date: 2020-05-26
JIANGXI UNIV OF SCI & TECH
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  • 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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  • Copper-aluminum-manganese alloy and preparation method thereof
  • 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 nonferrous metal material preparation, and discloses a copper-aluminum-manganese alloy and a preparation method thereof. The copper-aluminum-manganese alloy comprises the following chemical elements of, in percentage by mass, 9.5 %-10.5 % of Al, 11.5 %-12.5 % of Mn and the balance Cu, and metallographic structures of the copper-aluminum-manganese alloy comprises metastable beta phase structures and alpha phases dispersively distributed in crystals. According to the preparation method, the requirement on production equipment is low, a high-temperature solid solution heat treatment furnace is not needed, the preparation method is simple and energy-saving, and the gas protection is not needed, so that the popularization and application of the method are facilitated. According to the CuAlMn alloy prepared through the method, the tensile strength is larger than or equal to 1000 MPa, the elongation is larger than or equal to 12 %, and the softening resistance temperature of the alloy exceeds 400 DEG C; and the CuAlMn alloy can be applied to occasions with high requirements on strength and plasticity, namely the alloy can be applied to a heavy-load bearing bush, a wear-resistant and pressure-resistant valve body in high-temperature chemical equipment, an elastic structural member in nuclear reactor peripheral equipment and the like.

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 Applications(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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