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Preparation method of endogenous particle reinforced aluminium-based composite material

A particle-reinforced aluminum and composite material technology, which is applied in the field of industrial-scale preparation of endogenous particle-reinforced aluminum-based composite materials, can solve the problems of complex preparation process and equipment, high cost, difficult industrial scale production and application, and achieve particle Small size, low cost, evenly distributed effect

Active Publication Date: 2005-09-14
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, the preparation process and equipment of the above method are complicated, and the cost is high, so it is difficult to realize industrial scale production and application

Method used

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  • Preparation method of endogenous particle reinforced aluminium-based composite material
  • Preparation method of endogenous particle reinforced aluminium-based composite material
  • Preparation method of endogenous particle reinforced aluminium-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: heating resistance furnace (5), melting industrial pure aluminum in ceramic crucible (3), overheating to 950°C for heat preservation, carrying out nitrogen degassing and refining, and after standing for 12min, it will account for 7.6% of the mass percentage of molten aluminum ZrSiO 4 Add the powder into the aluminum melt through the conduit (7), and start electromagnetic stirring with the electromagnetic stirrer (4) at the same time, and keep warm at the same time. The electromagnetic stirring current is 30A, the electromagnetic field frequency is 10Hz, and the stirring time is 40min. Gas refining for 10 minutes, semi-continuous casting at 800°C. The composite material endogenous (Al 3 Zr+Al 2 o 3 ) The theoretical volume fraction of reinforcing particles is 5%. image 3 is the microstructure diagram of the composite material, given by image 3 It can be seen that the generated particles are fine.

Embodiment 2

[0035] Example 2: Heating the resistance furnace (5), melting the A356 alloy in a ceramic crucible (3), overheating to 900 ° C for heat preservation, carrying out nitrogen degassing and refining, and standing for 15 minutes, the mass percentage of the aluminum alloy melt will be 13.1 % powder ZrOCl 2 Add it into the molten aluminum alloy through the conduit (7), and start electromagnetic stirring with the electromagnetic stirrer (4) at the same time, and keep warm at the same time, the electromagnetic stirring current is 40A, the electromagnetic field frequency is 15Hz, and the stirring time is 30min, then remove the slag, and then carry out nitrogen gas Degassing and refining for 12 minutes, then semi-continuous casting at 800°C. The composite material endogenous (Al 3 Zr+Al 2 o 3 ) The theoretical volume fraction of reinforcing particles is 10%. Depend on Figure 4 It can be seen that the generated particles are fine.

Embodiment 3

[0036] Embodiment 3: Heating the resistance furnace (5), melting the A356 alloy in the ceramic crucible (3), overheating to 900 ° C for heat preservation, carrying out nitrogen degassing and refining, and after standing for 15 minutes, it will account for 21.4% of the mass percentage of the matrix alloy liquid mixed powder (K 2 TiF 6 +KBF 4 ) is mixed evenly by the molar ratio of Ti: B=1: 2 and added in the aluminum alloy melt through the conduit (7), and simultaneously starts to carry out electromagnetic stirring with the electromagnetic stirrer (4), carries out heat preservation simultaneously, electromagnetic stirring current 50A, electromagnetic field The frequency is 20Hz, the stirring time is 25min, and then the slag is removed, and the nitrogen degassing refining is carried out for 15min, and the semi-continuous casting is carried out at 800°C. The composite endogenous (TiB 2 +Al 3 The theoretical volume fraction of Ti) reinforcing particles is 15%. Depend on Fig...

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Abstract

This invention provides a preparation method of industrial scale preparing endogeny particle reinforcing aluminum base composite material. That is fusant reaction mthod + electromagnetic agitation proposal + dc casting forming integrated technology. The method is that compound contains reinforcing particle forming element is added to fusing aluminum or aluminum alloy at certain temperature, electromagnetic agitation is applied at the same time to make it fully reaction, and make endogeny particle to disperse uniformly in fusant, the composite material fusant got is cast into bar stock through half joint. The technique is simple, cost is low, period is short, and it can meet industrial production, is a new technology of realizing endogeny particle reinforcing aluminum base composite material industrial scale production. The endogeny particle has high strength, hardness and elastic modulus, the particle dimension is small and disperses uniform in matrix, so the reinforcing effect is good.

Description

technical field [0001] The invention relates to a method for preparing endogenous particle-reinforced aluminum-based composite materials on an industrial scale, that is, it is integrated by melt reaction method + electromagnetic stirring treatment + semi-continuous casting. Background technique [0002] Endogenous particle-reinforced metal matrix (aluminum matrix) composites. Since the reinforcement is a thermodynamically stable phase that nucleates and grows in situ from the metal matrix (usually Al), the surface of the reinforcement is free from pollution and avoids compatibility with the matrix. The problem of poor performance, and the interface bonding strength is high. Therefore, it has been praised as a breakthrough new compound and has attracted much attention. In recent years, it has become a new hotspot in the research of metal matrix (especially aluminum matrix) composite materials. According to the different states of the two reaction components participating in ...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C1/06C22C21/00
Inventor 赵玉涛程晓农戴起勋朱延山
Owner JIANGSU UNIV
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