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Method and device for preparing high-performance aluminum-base composite material under the action of pulsed magnetic field

An aluminum-based composite material and pulsed magnetic field technology, applied in the field of composite material preparation, can solve the problem of uneven distribution of particle segregation

Inactive Publication Date: 2010-06-02
JIANGSU UNIV
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  • Application Information

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Problems solved by technology

[0008] The object of the present invention is to provide a method and device for preparing high-performance particle-reinforced aluminum-based composite materials by in-situ crystallization under the action of a pulsed magnetic field, that is, a pulsed magnetic field is applied during the solidification and crystallization process of the composite melt, and a pulsed electromagnetic pulsed magnetic field is used. The action of force and pulse-induced thermal shock refines the solidification structure of the aluminum matrix and at the same time refines the in-situ crystallized particle phase, controls the cluster growth of the particle phase, and overcomes the problem of uneven distribution of particle segregation to prepare ultra-high Performance Particle Reinforced Composites

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  • Method and device for preparing high-performance aluminum-base composite material under the action of pulsed magnetic field
  • Method and device for preparing high-performance aluminum-base composite material under the action of pulsed magnetic field
  • Method and device for preparing high-performance aluminum-base composite material under the action of pulsed magnetic field

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Embodiment 1

[0029] Implementation example 1 Preparation of primary silicon reinforced aluminum matrix composite material by in-situ crystallization under pulsed magnetic field

[0030] High-silicon aluminum alloy Al-18% Si is prepared from pure aluminum and crystalline silicon, the synthesis temperature is 850°C, the parameters of the electromagnetic stirring magnetic field during the preparation process are 15Hz, and the current is 250A. During the solidification process, the pulse width of the pulsed magnetic field was 10 ms, the intensity of the pulsed magnetic field was 30 T, and the ingot drawing speed was 15 cm / min, and the aluminum matrix composite material reinforced by primary crystal silicon was obtained.

[0031] figure 2 It is the solidification structure and XRD detection result of Si particle reinforced aluminum matrix composite before and after applying pulsed magnetic field. Depend on figure 2 It can be seen that: (1) It can be seen from XRD that the types of phases in...

Embodiment 2

[0032] Preparation of Al by in-situ crystallization method under implementation example 2 pulsed magnetic field 3 Ti Particles Reinforced Aluminum Matrix (A356) Composite

[0033] A356 aluminum alloy and aluminum-titanium alloy were used to synthesize aluminum-titanium alloy melt Al-5%Ti at 840°C. During the synthesis process, the parameters of the electromagnetic stirring field were 1Hz and the current was 350A. The pulse width of the pulsed magnetic field during the solidification process is 500ms, the pulsed magnetic field intensity is 10T, and the ingot drawing speed is 10cm / min, and the Al 3 Ti particles reinforced A356-based composites.

[0034] image 3 is the Al before and after applying the pulsed magnetic field 3 Solidification structure and XRD detection results of Ti particle reinforced aluminum matrix composites. It can be seen from the figure: (1) From the XRD pattern, it can be concluded that the phase types in the solidification structure are α(Al) and Al ...

Embodiment 3

[0035] 20% Mg prepared by in situ crystallization method under the implementation example 3 pulsed magnetic field 2 Si Particle Reinforced Aluminum Matrix Composite

[0036] Preparation of Al-20%Mg from pure aluminum, pure silicon and Al-Mg alloy 2 For Si alloy, the synthesis temperature is 750°C, the parameters of the electromagnetic stirring magnetic field during the preparation process are 30Hz, and the current is 150A. The pulse width of the pulsed magnetic field in the solidification process is 100ms, the pulsed magnetic field intensity is 2T, and the ingot drawing speed is 10cm / min, and 20% Mg 2 Si particles reinforced aluminum matrix composites.

[0037] Figure 4 is the Mg before and after applying the pulsed magnetic field 2 Solidification structure and XRD detection results of Si particle reinforced aluminum matrix composites. It can be seen from the figure: (1) From the XRD pattern, the phase types in the solidified structure are α(Al) and Mg 2 Si phase; (2) I...

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Abstract

The invention provides a method and a device for preparing high-performance aluminum-base composite material under the action of the pulsed magnetic field with the in situ crystallization method, belonging to the technical field of material preparation. The method comprises the following steps: smelting to synthesize compound material melt at the temperature of 10-200 DEG C higher than the compound material melt liquidus temperature and pouring the compound material melt into a specially-designed crystallizer to make the compound material melt solidify under the action of the pulsed magnetic field. The pulsed magnetic field has the key parameters of the pulse width of 1-500 ms and the amplitude strength of 0.1-50T. The pulsed electromagnetic force is applied to the process of solidifying the compound material melt under the action of the pulsed magnetic field so as to refine the matrix structure and the particle reinforced phase of the compound material at the same time, control the growth of the particle reinforced phase in cluster, increase the bonding strength of the interface of the particle reinforced phase and the matrix and obviously improve the performance of the composite material.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a method and a device for preparing a high-performance in-situ self-generated aluminum-based composite material by using an in-situ crystallization method under the action of a pulsed magnetic field. Background technique [0002] Particle-reinforced aluminum matrix composites have gradually become a new type of material that is more and more widely used because of its composite structural characteristics and good physical, chemical and mechanical properties. At present, the in-situ composite method is an important method for preparing particle-reinforced aluminum matrix composites. Since the reinforcing phase of the in-situ composite method is nucleated and precipitated from the aluminum matrix in situ, it has high thermodynamic stability, and the interface between the composite phase and the matrix has high cleanliness, good wettability, and high bonding s...

Claims

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Application Information

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IPC IPC(8): C22F3/02
Inventor 王宏明李桂荣赵玉涛
Owner JIANGSU UNIV
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