A kind of preparation method of high-performance beryllium aluminum-rare earth alloy and its prepared product

A rare earth alloy and rare earth intermediate alloy technology, applied in the field of alloy preparation and beryllium aluminum alloy, can solve the problems of difficult to produce complex structural parts, alloy composition segregation, complex process, etc. high performance effects

Active Publication Date: 2018-10-02
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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Problems solved by technology

[0010] The purpose of the present invention is: in order to obtain beryllium-aluminum alloys with good performance, the methods of beryllium-aluminum pre-alloying and powder metallurgy, subsequent cold / hot deformation processing (rolling) and adding other alloy elements are generally used to realize beryllium-aluminum alloys. The purpose of refining the two-phase grains and improving the overall performance, but the process is complicated, the cost is high, and it is difficult to produce complex structural parts, and the alloy is still prone to the problem of composition segregation. A new high-performance beryllium-aluminum-rare earth alloy is provided Preparation methods and products prepared therefrom

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  • A kind of preparation method of high-performance beryllium aluminum-rare earth alloy and its prepared product

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preparation example Construction

[0047] The invention provides a method for preparing a novel high-performance beryllium-aluminum-rare earth alloy and the product thereof, wherein the alloy is composed of the following raw materials in mass percentage: beryllium content is 45-80%, aluminum content is 10-45%, rare earth The element content is 0.1~10%, and the rest are all impurities. Among them, rare earth elements include lanthanum (La), cerium (Ce), praseodymium (Pr), samarium (Sm), europium (Eu), gadolinium (Gd), erbium (Er), yttrium (Y), scandium (Sc), One or more of ytterbium (Yb), neodymium (Nd), and lutetium (Lu).

[0048] The specific steps of the method are as follows.

[0049] (1) Weigh each component according to the proportion and set aside. Put the rare earth element and some metal aluminum (calculated amount) into the mold in the vacuum induction melting furnace for melting, and cast to obtain the aluminum-rare earth master alloy ingot. Among them, the mass percentage of rare earth elements in...

Embodiment 1

[0061] In this embodiment, each component is weighed according to mass percentage: the beryllium content is 62%, the aluminum content is 37%, the rare earth element lanthanum content is 0.4%, the rare earth element erbium content is 0.4%, and the remaining 0.2% is all impurities.

[0062] The specific steps of this embodiment are as follows.

[0063] (1) Weigh each component according to the proportion and set aside. Calculate and prepare metal aluminum and rare earth lanthanum and erbium metal ingot raw materials, and design the total mass percentage of rare earth elements lanthanum and erbium in the aluminum-rare earth master alloy to be 30%. Considering that the volatility of metal aluminum is higher than that of lanthanum and erbium at higher melting temperature and higher vacuum degree, therefore, the amount of aluminum input is increased by 1.68% on the basis of the original calculation result.

[0064] Put the rare earth lanthanum and erbium metal ingot raw materials w...

Embodiment 2

[0071] In this embodiment, each component is weighed according to mass percentage: the beryllium content is 70%, the aluminum content is 28%, the rare earth element scandium content is 1.0%, the rare earth element cerium content is 0.8%, and the remaining 0.2% is the total content of all impurities.

[0072] The specific steps of this embodiment are as follows.

[0073] (1) Preparation of aluminum-scandium-cerium master alloy

[0074] Weigh each component according to the proportion and set aside. Calculate and prepare metal aluminum and rare earth scandium and cerium metal particle raw materials, and design the total mass percentage of rare earth elements scandium and cerium in the aluminum-rare earth master alloy to be 35%. Considering that the volatility of metal aluminum is higher than that of scandium and cerium at higher melting temperature and higher vacuum degree, the amount of aluminum input is increased by 1.82% based on the original calculation results. Due to the...

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Abstract

The invention discloses a preparation method for novel high-performance beryllium-aluminum-rare-earth alloy and a product prepared through the method and aims to the solve the problems that a method which adopts the mode of beryllium-aluminum prealloying, powder metallurgy, subsequent cold / heated shape-changing machining (rolling) and addition of other alloy elements at present is complex in process and high in cost, components of complex structures cannot be produced easily, and composition segregation of alloy is prone to occurring. According to the provided novel preparation method for the beryllium-aluminum-rare-earth alloy, metallic beryllium, metallic aluminum and rare earth elements are used as raw materials, and through combination of vacuum induction melting, prealloying, magnetic levitation melting, remelting and rapid cooling and reasonable adjustment of reaction conditions, the non-dendritic alloy with fine and uniform structures is successfully prepared and is fine and compact in grain, high in mechanical performance and low in composition segregation degree, and has good plasticity and machining forming performance and good application prospects. Meanwhile, the production process is simple, the cost is low, and components of complex structures can be prepared.

Description

technical field [0001] The invention relates to the field of alloy preparation, especially the field of non-ferrous metal alloys and their preparation, and further relates to the field of beryllium aluminum alloys, specifically a method for preparing high-performance beryllium aluminum-rare earth alloys and products prepared therefrom. Background technique [0002] Metal beryllium has low density (theoretical density 1.842g / cm3), high melting point (1287°C), high specific stiffness, specific strength, and excellent nuclear performance, thermal performance and optical properties, etc. application value. However, beryllium itself has defects such as high price, brittleness, and toxicity, which greatly limit its large-scale industrial application. At the same time, metal beryllium is brittle, difficult to process, and difficult to make complex structural parts, which also greatly limits the application range of beryllium. In order to make up for this defect of metal beryllium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C25/00C22C30/00C22C1/03
CPCC22C1/026C22C1/03C22C21/00C22C25/00C22C30/00
Inventor 余良波王晶王震宏董鲜峰曲凤盛王旻周运洪鲍永鑫杨勋刚周福印
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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