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In-situ reaction method for preparing aluminum-base composite material

An aluminum-based composite material and an in-situ reaction technology, which is used in the friction stir processing of aluminum-based composite materials and the field of in-situ reaction preparation of aluminum-based composite materials, which can solve the problem of roughening of the reinforcing phase of the material, poor compatibility of the matrix, and high equipment requirements. problems, to achieve the effect of small residual stress, smooth interface, and improved mechanical properties

Inactive Publication Date: 2012-10-10
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is complex and requires high equipment
[0005] The traditional method of preparing metal matrix composites by in-situ reaction is complicated in process and high in cost. The prepared material has coarsened reinforcement phase, severe agglomeration, poor compatibility with the matrix, and low adhesion.

Method used

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  • In-situ reaction method for preparing aluminum-base composite material
  • In-situ reaction method for preparing aluminum-base composite material
  • In-situ reaction method for preparing aluminum-base composite material

Examples

Experimental program
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Embodiment 1

[0023] Embodiment 1: as figure 1 , figure 2 , image 3 As shown, a plurality of parallel grooves 2 are opened near the surface of the 1060-H24 pure aluminum plate 1 to be processed with a thickness of 2.7mm. a processing area; the aluminum plate 1 to be processed is placed on the friction stir processing machine tool, and fixed with a clamp; the filler pure titanium powder 3 to be reacted with the matrix Al in situ to generate nanoscale reinforcement phase Al3Ti particles is filled in the groove 2, and compacted , and flush with the surface of the pure aluminum plate 1; the average particle size of the pure titanium powder is about 30 μm; use the stirring head 4 matching the size of the processing area to perform 8 passes of friction stir welding on each groove on the aluminum plate 1 , to obtain the Al3Ti nanoparticle reinforced aluminum matrix composite material 5; the advancing speed of the stirring head 4 is 50mm / min, and the rotating speed of the stirring head 4 is 150...

Embodiment 2

[0025] Embodiment 2: In embodiment 1, other types of aluminum alloy plates 1 can also be used, such as 1050, AA5083 and other pure aluminum plates or high-strength aluminum alloy plates; the average particle size of the Ti powder taken is 10-80 μm, and even other metal powders are used , such as Ni, etc.; the advancing speed of the stirring head 4 is 20~50mm / min, the rotating speed of the stirring head 4 is 1200~1500rpm, and 4~8 passes of friction stir processing can obtain Al3Ti nanoparticles reinforced aluminum matrix composites5 .

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Abstract

The invention discloses an in-situ reaction method for preparing an aluminum-base composite material. The in-situ reaction method is characterized by comprising arranging at least one groove on the surface of an aluminum material to be processed, and forming a processing area; placing the aluminum material to be processed on a friction stir processing machine tool and fixing the aluminum material by a fixture; filling and compacting packing which is about to be in in-situ reaction with a matrix to generate an enforcement in the grooves, and enabling the packing to be flush with the surface of the aluminum material; and carrying out friction stirring processing for the aluminum plate for multiple times by the aid of a stirrer with the size matching with that of the processing area to obtain the aluminum-base composite material. The aluminum-base composite material prepared by the method has the advantages that sizes of in-situ generated reinforced phases are effectively reduced, and dispersion degree of the in-situ generated reinforced phases is increased.

Description

technical field [0001] The invention relates to a method for preparing an aluminum-based composite material by in-situ reaction, in particular to a new friction-stir processing method for an aluminum-based composite material, and belongs to the technical field of metal composite material preparation. Background technique [0002] Due to its high specific modulus, high specific strength, good high temperature performance, more wear resistance, more fatigue resistance, isotropy, and low preparation cost, metal matrix composites are widely used in aerospace, automotive, etc. Manufacturing, weaponry and other fields. Among them, aluminum matrix composites have become one of the most concerned and fastest-growing materials among metal matrix composites due to their advantages such as small mass, low density, strong plasticity, and easy processing. [0003] The current preparation methods of aluminum matrix composites are mainly divided into two categories: 1. the preparation met...

Claims

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Application Information

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IPC IPC(8): B23K20/12
Inventor 陈科田胜张澜庭
Owner SHANGHAI JIAO TONG UNIV
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