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Method for preparing ultrafine grained aluminum alloy and composite material thereof

A composite material and aluminum alloy technology, which is applied in the field of preparing ultrafine-grained aluminum alloy and its composite materials by friction stir method, can solve the problems of difficult material microstructure, uniformity, non-uniformity, etc., and achieves flexible equipment layout, high pressure, The effect of material organization is uniform

Active Publication Date: 2013-10-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, studies have shown that since the heating method of friction stir processing is heating from one end, the processing thickness of the material is greatly limited. At present, the processed materials are generally plates, and the cutting thickness is less than 10mm; at the same time, only by increasing the FSP pass To improve the uniformity of the material structure and obtain a wide range of FSP materials, but still can not get a full sense of uniform distribution of the structure; from the current research, the implementation of FSP has not been able to break away from the FSW mode, which is fundamentally It is difficult to solve the uneven phenomenon of material microstructure

Method used

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  • Method for preparing ultrafine grained aluminum alloy and composite material thereof
  • Method for preparing ultrafine grained aluminum alloy and composite material thereof
  • Method for preparing ultrafine grained aluminum alloy and composite material thereof

Examples

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Embodiment 1

[0022] This embodiment specifically implements a method for preparing ultra-fine-grained A356 alloy: first, the A356 alloy is prepared into a plate with a thickness of 3 mm, a width of 50 mm, and a length of 200 mm, and then the plate and the A356 alloy material with a thickness of 5 mm, a width of 50 mm, and a length of 200 mm Lamination, under the action of 0.5MPa compressive stress, the friction heating part is used to heat the plate, and the plate and the above block material are heated to 550 °C, and then a rotating stirring rod is introduced between the plate and the block material; the friction heating part is made of Composed of 5 rotatable friction heads, the side of the friction head and the plate is made into a multi-channel concentric raised ring shape, the diameter of the friction head is 9mm, and the distance between adjacent friction heads is 1mm; the stirring rod is 4mm in diameter, The length is 50mm, high-speed steel cylindrical rod with standard thread, the s...

Embodiment 2

[0024] This embodiment specifically implements a method for preparing ultra-fine-grained 6061 alloy: first prepare the 6061 alloy into a plate with a thickness of 6 mm, a width of 160 mm, and a length of 500 mm, and then combine the plate with a 6061 alloy material with a thickness of 10 mm, a width of 160 mm, and a length of 500 mm Lamination, under the action of 5.0MPa compressive stress, the friction heating part is used to heat the plate, and the plate and the above block material are heated to 450 °C, and then a rotating stirring rod is introduced between the plate and the block material; the friction heating part is made of Composed of 8 rotatable friction heads, the side of the friction head and the plate is made into a multi-channel concentric raised ring shape, the diameter of the friction head is 18mm, and the distance between adjacent friction heads is 2mm; the stirring rod is 8mm in diameter, The length is 160mm, high-speed steel cylindrical rod with standard thread...

Embodiment 3

[0026] This embodiment specifically implements a method for preparing fine-grained SiC p / 6061 composite material method: first prepare the SiC / 6061 composite material into a plate with a thickness of 6mm, a width of 160mm, and a length of 400mm, and then laminate the plate with a SiC / 6061 composite material with a thickness of 10mm, a width of 160mm, and a length of 400mm. Under the action of 3.0MPa compressive stress, the friction heating part is used to heat the plate, and the plate and the above block material are heated to 500 °C, and then a rotating stirring rod is introduced between the plate and the block material; the friction heating part consists of 8 rotatable Composed of friction heads, the side of the friction head and the plate is made into a multi-channel concentric raised ring shape, the diameter of the friction head is 18mm, and the distance between adjacent friction heads is 2mm; the stirring rod is 8mm in diameter and 160mm in length. There is a high-speed s...

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Abstract

The invention relates to an aluminum alloy and a composite material thereof, and concretely relates to a method for preparing an ultrafine grained aluminum alloy and a composite material thereof. The method concretely comprises the following steps: processing the aluminum alloy or aluminum-based composite material to prepare a sheet, applying the sheet to a block material having a certain thickness and a same material, heating the sheet under the action of a pressure by adopting a friction heating part for heating the sheet and the block material to an assigned temperature, introducing a rotating stirring rod between the sheet and the block material, stirring while applying a pressure, and simultaneously moving the friction heating part and the stirring rod to one end from the other end until the stirring rod is moved out of the material; and applying another sheet having a same material to the larger plane of the above sheet, repeating the above steps to realize connection, continuously connecting new sheets until a required thickness is reached, and removing the initial block material to obtain a block grained material. Compared with preset methods, the method has the advantages of wide heating range, flexible apparatus arrangement, and uniform material structure.

Description

technical field [0001] The invention relates to an aluminum alloy and its composite material, in particular to a method for preparing an ultrafine-grained aluminum alloy and its composite material by using a friction stir method. technical background [0002] Grain refinement can effectively improve the strength of the material, and at the same time greatly improve the plasticity and toughness of the material. Therefore, the application potential of ultra-fine-grained materials with a grain size less than 1 μm is huge; at present, the preparation methods of ultra-fine-grained materials mainly include spraying Deposition method, mechanical grinding method, mechanical alloying method, amorphous crystallization method, friction compression torsion method, electrolytic deposition method, rapid solidification method and strong plastic deformation method; however, the above methods are due to their respective technical limitations, such as spray deposition The method is complicate...

Claims

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Application Information

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IPC IPC(8): C22F3/00
CPCC22F3/00C22F1/043B23K20/1235B23K2103/10C22F1/047
Inventor 赵玉涛陈刚张松利
Owner JIANGSU UNIV