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A kind of preparation method of high-performance aluminum alloy and its composite material

A technology for composite materials and aluminum alloys, applied in the field of preparation of high-performance aluminum alloys and their composite materials, to achieve high elastic modulus, low forming temperature, and strong plastic deformation

Active Publication Date: 2022-05-27
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above patents obtain aluminum-based composite materials, they need to be rolled at a higher temperature, and this method is generally used to manufacture plates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the high-performance aluminum alloy of the present embodiment and its composite material comprises the following steps:

[0022] 1) The spherical 6082 aluminum alloy powder with an average particle size of 30 μm and the SiC powder with a particle size of 1 μm are mixed by ball milling, under an argon protective atmosphere, the ball milling speed is 150r / min, and the ball milling time is 4h to obtain mixed powder;

[0023] 2) In step 1), a stainless steel tube with an outer diameter of 125 mm and an inner diameter of 119 mm is used as the wrapping material, and the mixed powder is put into the stainless steel wrapping, and a pressure of 40 MPa is applied to make the powder in the wrapping full and tight, and then degassing, After vacuuming and sealing, densification and toughening are carried out by rotary forging. The aforementioned densification and toughening by swaging refers to: swaging the steel pipe filled with mixed powder at room temper...

Embodiment 2

[0027] The preparation method of the high-performance aluminum alloy of the present embodiment and its composite material comprises the following steps:

[0028] 1) The spherical 6061 aluminum alloy powder with an average particle size of 30 μm and the SiC powder with a particle size of 1 μm are mixed by ball milling, under an argon protective atmosphere, the ball milling speed is 150r / min, and the ball milling time is 4h to obtain mixed powder;

[0029] 2) In step 1), a stainless steel tube with an outer diameter of 100 mm and an inner diameter of 95 mm is used as the wrapping material, and the mixed powder is put into the stainless steel wrapping, and a pressure of 40 MPa is applied to make the powder in the wrapping full and tight, and then degassing, After vacuuming and sealing, densification and toughening are carried out by rotary forging. The aforementioned densification and toughening by swaging refers to: swaging the steel pipe filled with mixed powder at room tempera...

Embodiment 3

[0033] The preparation method of the high-performance aluminum alloy of the present embodiment and its composite material comprises the following steps:

[0034] 1) mixing spherical 6061 aluminum alloy powder with an average particle size of 30 μm and graphene by ball milling, under an argon protective atmosphere, the ball milling speed is 150r / min, and the ball milling time is 4h to obtain mixed powder;

[0035] 2) In step 1), a stainless steel tube with an outer diameter of 100 mm and an inner diameter of 95 mm is used as the wrapping material, and the mixed powder is put into the stainless steel wrapping, and a pressure of 40 MPa is applied to make the powder in the wrapping full and tight, and then degassing, After vacuuming and sealing, densification and toughening are carried out by rotary forging. The aforementioned densification and toughening by swaging refers to: swaging the steel pipe filled with mixed powder at room temperature according to the processing rate of 3...

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Abstract

The invention relates to a preparation method of high-performance aluminum alloy and its composite material, which is characterized in that it comprises the following steps in sequence: 1) mixing aluminum alloy powder and reinforcement powder through ball milling to obtain mixed powder; 2) obtaining mixed powder in step 1) Put the mixed powder into the steel sheath, apply a pressure of 30-50MPa to make the powder full and compact in the sheath, then degas, vacuumize, seal and weld, and carry out densification and toughening by swaging; 3 ) processing the blank obtained in step 2) to remove the steel sheath to obtain an aluminum-based composite material. Under the impact of high-speed cold swaging at room temperature, through the plastic deformation of aluminum alloy powder and the mutual friction of reinforcements, the dense oxide film on the surface of aluminum alloy powder is removed, the bonding ability of powder metallurgy is enhanced, and the powder densification is realized.

Description

technical field [0001] The invention belongs to the field of metals and their matrix composite materials, and in particular relates to a preparation method of a high-performance aluminum alloy and a composite material thereof. Background technique [0002] Powder metallurgy aluminum alloy has the characteristics of low density, high specific strength, high wear resistance and corrosion resistance, showing broad application prospects. At present, the main production processes of aluminum-based powder metallurgy include normal temperature pressing, warm pressing, hot extrusion, powder forging, etc. These preparation methods often require sintering or extrusion deformation at temperatures above 400 °C. In the process of powder solidification, due to the high activity of Al, a dense oxide film is inevitably formed during the rapid solidification and milling process, which leads to the restriction of the mutual diffusion of alloying elements during the densification process, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05B22F3/17B22F9/04
CPCC22C1/05B22F9/04B22F3/172
Inventor 王军曹召勋刘辰付玉王荫洋韩俊刚徐永东朱秀荣
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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