Preparation method of hollow sphere and aluminum alloy-based sound insulation material

An aluminum alloy-based, sound-insulating material technology, applied in the field of composite material equipment, can solve problems such as complex operation process, and achieve the effects of simple operation process, reduced holes, and short process flow

Active Publication Date: 2018-11-13
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Rabiei et al. used the gravity casting method to prepare low-carbon steel hollow sphere / 356 aluminum alloy composite foam material. Due to the inability to apply pressure during the preparation process, there were a large number of other holes in the prepared composite material except for the inner cavity of the hollow sphere; Dou et al. used the pressure infiltration method to prepare fly ash hollow balls / 2024 aluminum alloy composites. Although this method can reduce the existence of holes, the operation process is complicated.

Method used

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  • Preparation method of hollow sphere and aluminum alloy-based sound insulation material
  • Preparation method of hollow sphere and aluminum alloy-based sound insulation material
  • Preparation method of hollow sphere and aluminum alloy-based sound insulation material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Weigh 3.71g (150 pieces) of 316L hollow spheres and 40g of 7075 aluminum alloy powder (D50, 10μm). Use dilute hydrochloric acid to clean the oxide film on the surface of the hollow ball, then use alcohol to further clean the hollow ball in an ultrasonic cleaner, and dry the cleaned hollow ball with a hair dryer for later use. The cleaned hollow balls and the weighed 7075 aluminum alloy powder are prefabricated in a stainless steel mold sprayed with boron nitride, and the hollow balls are randomly and evenly distributed inside the matrix.

[0030] Put the prefabricated mold into a vacuum hot-press sintering furnace for hot-press sintering. The entire heating and cooling process is carried out in a vacuum environment. Heat the sample to 500°C at a heating rate of 6°C / min, and keep the pressure at 16MPa during the heating process; keep it at 500°C for 30 minutes, and keep the pressure at 16MPa during the holding process; then heat the sample at a heating rate of 3°C / min ...

Embodiment 2

[0037] Weigh 2.47g (100 pieces) of 316L hollow spheres and 30g of 7075 aluminum alloy powder (D50, 10μm). Use dilute hydrochloric acid to clean the oxide film on the surface of the hollow ball, then use alcohol to further clean the hollow ball in an ultrasonic cleaner, and dry the cleaned hollow ball with a hair dryer for later use. The cleaned hollow balls and the weighed 7075 aluminum alloy powder are prefabricated in a stainless steel mold sprayed with boron nitride, and the hollow balls are randomly and evenly distributed inside the matrix.

[0038]Put the prefabricated mold into a vacuum hot-press sintering furnace for hot-press sintering. The entire heating and cooling process is carried out in a vacuum environment. Heat the sample to 530°C at a heating rate of 8°C / min, and keep the pressure at 20MPa during the heating process; keep it at 530°C for 30 minutes, and keep the pressure at 20MPa during the holding process; then heat the sample at a heating rate of 2°C / min T...

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Abstract

The invention provides a preparation method of a hollow sphere and aluminum alloy-based sound insulation material, the method is a simple and convenient method for preparing the lightweight high-performance sound insulation material. The cleaned stainless steel hollow ball and the aluminum alloy base body are placed into a die, the stainless steel hollow spheres are randomly and uniformly distributed in the aluminum alloy matrix, so as to obtain a hollow sphere and an aluminum alloy prefabricated body, putting the prefabricated body and the mold into a vacuum hot-pressing sintering furnace for hot-pressing sintering, carrying out hot-pressing sintering, taking out and carrying out T7 heat treatment. The hollow sphere and the aluminum alloy sound insulation material obtained by the methodcan achieve uniform distribution of the hollow sphere in the matrix, and the porosity in the sound insulation material can be controlled.

Description

technical field [0001] The invention relates to a composite material preparation method, in particular to a method for preparing stainless steel hollow spheres and aluminum alloy-based sound-insulating materials using powder metallurgy technology. Background technique [0002] Metal foam is a kind of metal solid material containing a large number of pores. This kind of material often has a special pore structure, a large porosity, a large specific surface area, a small density, and a certain strength and stiffness. Due to this unique structure, this kind of material often has excellent performances such as vibration and noise reduction, cushioning and energy absorption, heat insulation and radiation shielding, and can be widely used in aerospace, petrochemical, nuclear energy, construction, automobile and other industries. However, the traditional metal foam has problems such as difficult control of pore size and uneven pore distribution, which lead to local weakness of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04B22F3/14
CPCB22F3/14B22F2998/10C22C1/0416B22F3/03B22F2003/248
Inventor 姜风春范琦琪果春焕王春鹤于天淼孙小婧
Owner HARBIN ENG UNIV
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