Preparation method of non-crystalline grains reinforced aluminium-base composite material by means of explosive compaction

A technology for strengthening aluminum matrix and composite materials, applied in the field of explosive processing, can solve the problems of high preparation cost, multiple manpower, material and financial resources, etc., and achieve the effects of low cost, elimination of bending effects, and prevention of macroscopic cracks

Inactive Publication Date: 2010-06-23
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of foreign amorphous particle-reinforced metal matrix composites usually adopts the method of mechanical alloying and powder metallurgy. This method requires special equipment, consumes more manpower, material resources and financial resources, and the preparation cost is higher.

Method used

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  • Preparation method of non-crystalline grains reinforced aluminium-base composite material by means of explosive compaction
  • Preparation method of non-crystalline grains reinforced aluminium-base composite material by means of explosive compaction
  • Preparation method of non-crystalline grains reinforced aluminium-base composite material by means of explosive compaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Fe-based amorphous powder (purity 99.5%, particle size 200 mesh) is used as the reinforcing phase, and its composition is: Fe63.3%, W15.36%, Mo10.95%, Ni5.43%, Cr3.56%, Si1. 28%. The amorphous powder is mixed with Al powder (99%, 325 mesh) at a mass fraction of 5%. Use an XQM-2L planetary ball mill to make it evenly mixed, and this process lasts for 4 hours with a rotating speed of 80rpm. Inner tube 6 has an inner diameter of 26mm and an outer diameter of 29mm, an outer tube 7 with an inner diameter of 33mm and an outer diameter of 37mm, and the distance between the inner and outer tubes is 2mm. After welding the inner tube 6, the outer tube 7 and the steel lower end plug 9, the powder is loaded and the mixed powder is loaded. 5 thickness 10mm, powder porosity 36.4%, 3 layers of steel pad 8, diameter 25.6mm, height 5mm, PVC upper end plug 2 is placed on the upper end of the device to adjust the waveform, the upper end plug cone angle is 120 degrees, explosive 3 thickne...

Embodiment 2

[0026] The mass fraction of amorphous powder is 30%, the inner diameter of the inner tube 6 is 26 mm, the outer diameter is 30 mm, the inner diameter of the outer tube 7 is 40 mm, the outer diameter is 45 mm, the distance between the inner and outer tubes is 5 mm, and two layers of steel pads 8 are set, with a diameter of 25.6 mm. The height is 10mm, the thickness of the explosive 3 is 48mm, and other conditions are the same as in Example 1 to obtain 3 samples with a diameter of 23.8mm and a height of 8.6mm.

[0027] The X-ray diffraction (XRD) test results of the compacted parts showed that the amorphous reinforcement in the composite material did not crystallize during the explosive compaction (such as figure 2 shown); as image 3Shown are the scanning electron microscope (SEM) photographs of the amorphous particle-reinforced Al-based composite material with amorphous mass fractions of 5% and 30%, respectively. Observation shows that the amorphous reinforcement is uniformly...

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Abstract

The invention discloses a preparation method of double pipes of a non-crystalline grains reinforced aluminium-base composite material by means of explosive compaction, which comprises the steps of: evenly mixing non-crystalline powder which is taken as reinforced phase and aluminium-base body powder, and filling into a steel inner pipe; arranging a steel outer pipe with a gap out of the inner pipe; arranging subuliform PVC end stoppers at the upper ends of the inner pipe and the outer pipe to adjust the wave shape; sealing the lower ends of the inner pipe and the outer pipe; packing explosive out of the outer pipe; exploding at the center of a top by a blasting cap; adopting a point exploding mode; slidably detonating at the side wall of the outer pipe after exploding the explosive to drive the outer pipe to beat the inner pipe and compact the powder; and eliminating the inner pipe and the outer pipe to obtain the block non-crystalline grains reinforced aluminium-base composite material. The preparation method can effectively prevent heat energy generated by the exploding of the explosive from acting on the mixed powder and can effectively reduce the whole temperature increase of the powder to be capable of keeping the characteristic of the non-equilibrium state of the reinforced phase non-crystalline grains; can arrange the layers of steel cushion in the inner pipe with numbers as required to obtain the block composite material with required numbers for once; and has low cost.

Description

technical field [0001] The invention belongs to the technical field of explosive processing, in particular to a double-tube explosive compaction preparation method of amorphous particle reinforced aluminum-based composite materials. Background technique [0002] Particle-reinforced metal matrix composites are widely used in some rigid, wear-resistant and heat-resistant parts in the aerospace field, as well as in the electronics industry and automotive industry. The low expansion coefficient, high thermal conductivity and low density of particle-reinforced metal matrix composites It has been applied in the fields of optical instruments and precision instruments. [0003] Amorphous materials have attracted extensive attention in recent years due to their importance in science and engineering. Compared with traditional metals and alloys, amorphous materials have high strength, high hardness and high elastic strain limit, relatively high fracture toughness, fatigue resistance a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/08
Inventor 王金相杭逸夫孙宇新荣光葛伟张晓立
Owner NANJING UNIV OF SCI & TECH
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