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a preparation al 3 method of strengthening aluminum-based materials

A technology for strengthening aluminum-based and composite materials, which is applied in the field of metal smelting and extraction, and can solve problems such as the interface is easily oxidized or damaged, high production costs, and cumbersome procedures.

Active Publication Date: 2021-08-20
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In industry, powder metallurgy is often used to prepare aluminum-based composite materials. It needs to go through steps such as powder making, mixing, granulating, molding, and sintering. The process is cumbersome and the production cost is high.
In addition, due to the low wettability of the reinforced particles and the liquid aluminum, the interface formed is easily oxidized or damaged, which seriously affects the comprehensive performance of the composite material.

Method used

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  • a preparation al <sub>3</sub> method of strengthening aluminum-based materials
  • a preparation al <sub>3</sub> method of strengthening aluminum-based materials
  • a preparation al <sub>3</sub> method of strengthening aluminum-based materials

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Embodiment 1

[0027] Example 1: see figure 2 and image 3 , a preparation of Al 3 Ti-reinforced aluminum-based material method, at 920-1000 ° C, dosing titanium oxide or titanium fluoride into the aluminum liquid, using metal aluminum as the reducing agent, aluminothermic reduction reaction occurs for 0.5-2h, the aluminothermic reduction process The reduced titanium further reacts with aluminum to form Al 3 Ti,Al 3 Ti enters the molten aluminum and distributes evenly to form Al 3 Ti-enhanced aluminum-based materials. During specific implementation, the reduction reaction temperature can be selected from 920°C, 930°C, 940°C, 950°C, 960°C, 970°C, 980°C, 990°C or 1000°C, and the reduction time can be selected from 0.5h, 0.8h, 1.0h, 1.2 h, 1.4h, 1.5h, 1.6h, 1.8h or 2h.

[0028] The Al 3 Ti-enhanced aluminum-based materials contain 2%≤Al by volume percentage 3 Ti≤25%. Specifically, Al 3 Al in Ti-reinforced aluminum-based materials 3 The volume percentage of Ti can be selected from 2%...

Embodiment 2

[0034] Example 2: see Figure 1 to Figure 3 , a preparation of Al 3 Ti strengthens the method for aluminum base material, is solvent with cryolite base molten salt, and aluminum oxide (aluminum oxide in this embodiment is Al 2 o 3 ) as the solute for electrolytic production of aluminum, adding titanium oxide or titanium fluoride to the cryolite-based molten salt, at 920-1000 ° C, using metal aluminum as the reducing agent, the aluminothermic reduction reaction occurs for 0.5-2h, aluminum The reduced titanium further reacts with aluminum to form Al during thermal reduction 3 Ti,Al 3 Ti enters the molten aluminum and distributes evenly, and the alloy and cryolite-based molten salt are separated to obtain Al 3 Ti reinforced aluminum matrix composites. During specific implementation, the reduction reaction temperature can be selected from 920°C, 930°C, 940°C, 950°C, 960°C, 970°C, 980°C, 990°C or 1000°C, and the reduction time can be selected from 0.5h, 0.8h, 1.0h, 1.2 h, 1.4...

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Abstract

The present invention relates to a kind of preparation Al 3 The method of Ti reinforcing aluminum-based materials is to add titanium oxide or titanium fluoride to the molten aluminum at 920-1000°C, use metal aluminum as the reducing agent, and undergo an aluminothermic reduction reaction for 0.5-2h. The aluminothermic reduction process The reduced titanium further reacts with aluminum to form Al 3 Ti,Al 3 Ti enters the molten aluminum and distributes evenly to form Al 3 Ti-enhanced aluminum-based materials. The method shortens the process flow, reduces the preparation cost, and greatly reduces the impurity content, thereby improving the comprehensive performance of the aluminum-based material. al 3 The interface between Ti-enhanced particles and the matrix is ​​clean, pollution-free, and has good compatibility, high interfacial bonding strength, and its mechanical properties and wear properties are greatly improved. 3 The Ti-reinforced particles are an ordered phase, exhibiting high strength and elastic modulus. In addition, the intermetallic phase also has good oxidation resistance and corrosion resistance in the fluoride atmosphere above the melting point of aluminum.

Description

technical field [0001] The invention relates to the field of metal smelting and extraction, in particular to the preparation of Al by aluminothermic reduction in the process of industrial aluminum electrolysis 3 A method for the reinforcement of aluminum-based alloys with Ti particles. Background technique [0002] Aluminum has been widely used in transportation, electric power, machinery manufacturing, building materials and packaging due to its small specific gravity, high strength, excellent electrical and thermal conductivity, and high corrosion resistance. It has become an irreplaceable metal material. my country's aluminum production ranks among the top in the world over the years, and its products are mainly distributed in cold-rolled products and aluminum profiles, with few involving high value-added alloy materials. [0003] Metal matrix composites have broad application prospects in other structural engineering materials. It usually consists of a metal matrix and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22B5/04C25C3/06C22C1/02
Inventor 李涛谭敏严建川商志强余骞余先颜
Owner CHONGQING UNIV
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