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Endogenesis sub-micron TiB2 particle enhanced aluminum-base composite material and preparing technique thereof

A particle-reinforced aluminum and composite material technology, applied in the field of metal matrix composite materials, can solve the problems of inability to meet the requirements of industrial scale production, poor wettability between reinforced particles and the matrix, and high price of reinforced particles, and achieve great potential in market application. The effect of easy control of volume content and easy control of volume fraction

Active Publication Date: 2008-04-30
CHINALCO MATERIALS APPL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantages of high price of reinforced particles and complex manufacturing process, which cannot meet the requirements of industrial scale production
Moreover, in the composite material prepared by this method, the wettability between the reinforcing particles and the matrix is ​​poor, and the interface reaction is difficult to control.

Method used

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  • Endogenesis sub-micron TiB2 particle enhanced aluminum-base composite material and preparing technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Composition of material: Zn 8.0wt%, Mg 1.3wt%, Cu 3.5wt%, Zr 0.2wt%, TiB 2 The particle content is 10wt%, and the rest is Al.

[0036] After adding pure aluminum ingots into the smelting furnace, the furnace temperature is set at 750°C. After it is completely melted, the temperature is raised to 860-900°C. After the aluminum melt is kept at 860-900°C, add CH-T type at 860-900°C. Cover the melt with a sodium-free covering agent, dry NaBF4 and Al-Ti with a mass ratio of 1:2, add it to the melt, and stir. During the stirring process, use argon inert gas protection, and the stirring speed is 300r / min , the stirring time is 60min, and the stirring temperature is 860-900°C; after the reaction is completed, remove the reaction by-products, add pure Zn, pure magnesium Al-Cu, Al-Zr, and add a refining agent to the melt after melting for degassing and refining. The refining agent adopts the green environmental protection ZS-AZ refining agent, the refining temperature is 750 °C, ...

Embodiment 2

[0038] Composition of material: Zn 4.5wt%, Mg 3.0wt%, Cu 1.0wt%, Zr 0.05wt%, TiB 2 The particle content is 20wt%, and the rest is Al.

[0039] After adding pure aluminum ingots into the smelting furnace, the furnace temperature is set at 750°C. After complete melting, the temperature is raised to 660-860°C. After the aluminum melt is kept at 660-860°C, CH-T is added at 750-860°C. Type sodium-free covering agent to cover the melt, dry KBF4 and Al-Ti with a mass ratio of 1:2.5, add it to the melt, and stir it. During the stirring process, protect it with argon inert gas, and the stirring speed is 2000r / min , the stirring time is 30min, and the stirring temperature is 750-860°C; after the reaction is completed, remove the reaction by-products, add pure Zn, pure magnesium Al-Cu, Al-Zr, and add a refining agent to the melt after melting for degassing and refining. The refining agent adopts the green environmental protection ZS-AZ refining agent, the refining temperature is 720°C, ...

Embodiment 3

[0041] Composition of material: Zn 10wt%, Mg 2.5wt%, Cu 5.0wt%, Zr 0.25wt%, TiB 2 The particle content is 15wt%, and the rest is Al.

[0042] After adding pure aluminum ingots into the smelting furnace, the furnace temperature is set at 750°C. After it is completely melted, the temperature is raised to 700-900°C. After the aluminum melt is kept at 700-900°C, CH-T is added at 750-900°C. Type sodium-free covering agent to cover the melt, dry the NaBF4 and Al-Ti with a mass ratio of 1:2, add it to the melt, stir, and protect it with argon inert gas during the stirring process, and the stirring speed is 1000r / min , the stirring time is 50min, and the stirring temperature is 750-900°C; after the reaction is completed, remove the reaction by-products, add pure Zn, pure magnesium Al-Cu, Al-Zr, and add a refining agent to the melt for degassing and refining after melting. The refining agent adopts the green environmental ZS-AZ refining agent, the refining temperature is 740°C, and th...

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Abstract

The invention provides an endogenous submicron TiB2 particle-reinforced aluminum-based composite material and a preparation process, the composition: Zn 4.5-10wt%, Mg 1.0-3.0wt%, Cu 1.0-5.0wt%, Zr 0.05-0.25wt%, TiB2 Particles 5-20wt%. Process: After the industrial pure aluminum ingot is completely melted, cover the aluminum melt with a covering agent and raise the temperature; after the aluminum melt is kept warm, add the dried Al-Ti master alloy, KBF4 or NaBF4 reaction salt, and stir; after the reaction, Remove reaction salt slag, add industrial pure Zn, Mg, Al-Cu, Al-Zr master alloy, refining and degassing treatment, remove scum, pour into mold after standing; billet homogenization treatment, wagon, and then hot extrusion Pressing or rolling processing; the composite material after extrusion or rolling is subjected to solution aging treatment, and quenched in water at room temperature to obtain an ultra-high-strength aluminum-based composite material. The endogenous submicron TiB2 particles are fine, the surface is clean, and the utilization rate of the reinforcement phase is high; the process is simple and suitable for large-scale production.

Description

technical field [0001] The invention relates to an endogenous submicron TiB 2 The invention relates to particle-reinforced aluminum-based composite materials and a preparation process thereof, which belong to the technical field of metal-based composite materials. Background technique [0002] At present, the development and application of modern high-tech continue to put forward various requirements for materials, and promote the development of materials in many aspects such as high specific strength, high specific stiffness, high specific toughness, high temperature resistance, and fatigue resistance. Metal matrix composites have the synergistic effect of their constituent raw materials, integrating the advantages of high specific modulus, high specific strength, controllable thermal expansion coefficient and good high temperature performance, and have the characteristics of a large degree of freedom in material design. After decades of development, it has become one of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03C22F1/04C22C1/06
Inventor 毛建伟张建平乐永康
Owner CHINALCO MATERIALS APPL RES INST CO LTD
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