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Al-Zn composite material and solid-state alloying manufacturing method thereof

A composite material and alloying technology, which is applied in the field of metal processing, can solve problems such as high cost and energy consumption, numerous influencing factors, and complicated process flow, and achieve the advantages of avoiding solidification cracks and pores, high alloying degree, and low residual stress Effect

Inactive Publication Date: 2014-05-28
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Mechanical alloying can achieve elemental alloying in the solid state, but the mechanical alloying process is complex, with many influencing factors (milling speed, milling time, milling temperature, etc.), and the cost is high, and the obtained alloy is in powder form. It also requires complex follow-up molding and sintering, the process is complicated, and the cost and energy consumption are extremely high.

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  • Al-Zn composite material and solid-state alloying manufacturing method thereof
  • Al-Zn composite material and solid-state alloying manufacturing method thereof

Examples

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Embodiment 1

[0025] The method for preparing Al-Zn composite material by solid state alloying in this embodiment comprises the following steps:

[0026] 1) Select the aluminum plate, and process small holes with a depth of 3.5mm on the aluminum plate in a row;

[0027] 2) Fill the small hole in step 1) with zinc powder and compact it;

[0028] 3) The small hole and the surrounding area filled with zinc powder by mechanical stirring and friction, the total area of ​​the processing area is twice the area of ​​the small hole when stirring, the depth of the stirring needle is 4mm, the rotation speed of the stirring head is 940r / min, and the walking speed is 15mm / min, the friction stir process in this embodiment is as follows figure 1 shown.

[0029] As an improvement of this embodiment, the aluminum plate selected in step 1) is the 1100 pure aluminum plate shown, with a thickness of 6mm and a specific size of 300mm×100mm×6mm.

[0030] As another improvement of this embodiment, the particle...

Embodiment 2

[0035] The method for preparing Al-Zn composite material by solid state alloying in this embodiment comprises the following steps:

[0036] 1) Select the aluminum plate, and process holes with a depth of 4mm on the aluminum plate in a row;

[0037] 2) Fill the small hole in step 1) with zinc powder and compact it;

[0038] 3) The small hole and the surrounding area filled with zinc powder by mechanical stirring and friction, the total area of ​​the processing area is 1.5 times the area of ​​the small hole when stirring, the rotation speed of the stirring head is 960r / min, the depth of the stirring needle is 4.5mm, and the walking speed is 15mm / min.

[0039] As an improvement of this embodiment, the selected aluminum plate in step 1) is a 1100 pure aluminum plate with a thickness of 7mm.

[0040] As another improvement of this embodiment, the particle size of Zn powder selected in step 2) is 300 mesh.

[0041] As a further step of this embodiment, the small holes processed ...

Embodiment 3

[0044] The method for preparing Al-Zn composite material by solid state alloying in this embodiment comprises the following steps:

[0045] 1) Select the aluminum plate, and process holes with a depth of 3mm on the aluminum plate in a row;

[0046] 2) Fill the small hole in step 1) with zinc powder and compact it;

[0047] 3) The small hole and the surrounding area filled with zinc powder are mechanically stirred and frictionally stirred. The total area of ​​the processing area is 2.5 times the area of ​​the small hole when stirring, the rotation speed of the stirring head is 920r / min, the depth of the stirring needle is 4mm, and the walking speed is 15mm / min.

[0048] As an improvement of this embodiment, the selected aluminum plate in step 1) is a 1100 pure aluminum plate with a thickness of 5.5 mm.

[0049] As another improvement of this embodiment, the particle size of Zn powder selected in step 2) is 200 mesh.

[0050] As a further step of this embodiment, the small h...

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Abstract

The invention discloses an Al-Zn composite material which comprises an Al base body and Al-Zn alloy blocks distributed on the Al base body. The Al-Zn alloy blocks are distributed in the Al base body in an array. The embodiment of the invention further discloses an Al-Zn composite material solid-state alloying manufacturing method. Firstly, an aluminum sheet is selected, and rows of small holes are formed in the aluminum sheet, then the small holes are filled with zinc powder and compacted, and finally the small holes filled with the zinc powder and the peripheral area of the small holes are mechanically mixed and rubbed. The Al-Zn alloy blocks in the Al-Zn composite material is high in alloying degree, the Al-Zn alloy blocks and the Al base body are tightly combined, and the using requirement of special environments can be met. The mixing and rubbing method is used for processing the Al-Zn composite material, and the alloy blocks can be directly manufactured under the solid phase condition. The technology is simple, the requirement for equipment is low, and the obtained alloy organizational structure is compact and fine in crystalline grain.

Description

technical field [0001] The invention belongs to the field of metal processing and relates to a method for preparing an Al-Zn composite material, in particular to a method for preparing an Al-Zn composite material containing an Al-Zn bulk alloy under solid state conditions. Background technique [0002] Mechanical Alloying (MA) process is a solid powder processing technology proposed by Benjamin et al. of International Nickel Corporation around 1969. The basic principle is to combine two or more metal powders or metal and non-metal powders. Ball milling after mixing, after repeated deformation, crushing and refinement, a large amount of strain and lattice defects (such as dislocations, vacancies, stacking defects, grain boundaries, etc.) achieve chemical bonding. [0003] The friction stir welding (frictionstirwelding, FSW) process is a new type of solid phase welding technology invented by the British Welding Institute in 1991. Slowly insert the workpiece to be welded, and...

Claims

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Application Information

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IPC IPC(8): B22F7/08B22F3/00
Inventor 周正谢碧君袁宵赵小军
Owner CHONGQING UNIV
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