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Method for preparing aluminum-based composite material plate by friction stir

An aluminum-based composite material and friction stir technology, which is applied in the field of friction stir preparation of aluminum-based composite materials and achieves the effect of simple process steps.

Inactive Publication Date: 2009-10-21
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
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Problems solved by technology

At present, there is no method that can use FSP solid-phase forming technology to prepare particle-reinforced aluminum matrix composite sheets.

Method used

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  • Method for preparing aluminum-based composite material plate by friction stir

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Embodiment Construction

[0016] The friction stir preparation method of the aluminum-based composite material plate of the present embodiment comprises the following steps: 1. uniformly forming several circular holes with a diameter of 1-5 mm on a base material aluminum plate (pure aluminum plate) with a thickness of 2 mm, Mix titanium powder with a particle size of 30-100 microns in advance with alcohol, grind and stir it into a paste, and then place it in the small hole to form an intermediate plate; ② sandwich the intermediate plate with the base material A composite sheet is formed between surface aluminum sheets with the same composition and specifications of the aluminum sheets; ③ performing friction stir treatment on the composite sheet with a stirring head of a friction stir welding machine to obtain an aluminum matrix composite sheet. Preheating may also be performed prior to the friction stir treatment. During the friction stir treatment, the rotation speed of the stirring head was 800 rpm, ...

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Abstract

A method for preparing an aluminum-based composite material plate by friction stir comprises the following steps of: (1) forming a plurality of holes on an aluminum plate of base material, and placing reinforcing particles in the holes, thus forming an intermediate plate; (2) holding and arranging the intermediate plate between aluminum plates of surface layer, the component of which is the same with that of the aluminum plate of base material, thus forming a composite plate; (3) carrying out friction-stir processing to the composite plate by utilizing a stirring head, thus obtaining the aluminum-based composite material plate. By using the prepared Ti / Al composite plate, Ti particles are distributed uniformly in the plate and refined obviously, and particles of large size are reduced. The prepared aluminum-based composite material has high hardness which is about 2 to 3 times of matrix hardness.

Description

technical field [0001] The invention relates to the technical field of preparation methods of aluminum-based composite materials, in particular to a method for preparing aluminum-based composite material plates by friction stirring. Background technique [0002] Metal matrix composites have high specific modulus, specific strength, excellent high-temperature mechanical properties, good wear resistance, dimensional stability, fatigue resistance, small thermal expansion coefficient, etc., and are widely used in aerospace, automotive, military, etc. field. At present, aluminum matrix composites have received widespread attention at home and abroad, and have become the mainstream of the current development and research of metal matrix composites. Compared with fiber reinforced aluminum matrix composites, particle reinforced aluminum matrix composites have the advantages of isotropy, secondary processing and low cost. Compared with ordinary aluminum alloys, particle-reinforced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C21/00
Inventor 张华黄继华吴会强赵兴科李正华
Owner UNIV OF SCI & TECH BEIJING
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