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Aluminum alloy toughening method based on pulse current

A pulsed current, aluminum alloy technology, applied in the field of material processing and preparation, can solve problems such as difficult to apply to industrial production, difficult operation, unfavorable plasticity, etc., and achieve outstanding contributions, improved comprehensive mechanical properties, and excellent tensile strength. Effect

Inactive Publication Date: 2019-09-17
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for aluminum alloys, while obtaining an ultra-fine grain structure, many defects will be introduced, which is not conducive to the improvement of plasticity.
And because this method is difficult to operate, it is still difficult to apply to industrial production at present.

Method used

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  • Aluminum alloy toughening method based on pulse current
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  • Aluminum alloy toughening method based on pulse current

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of high-strength 6000-series aluminum alloys.

[0030] In this embodiment, a method for strengthening and toughening aluminum alloy based on pulse current includes the following steps:

[0031] Step 1: Obtain a 6061 aluminum alloy plate, the mass percentage of which is: 0.88% Mg, 0.64% Si, 0.43% Fe, 0.24% Cu, 0.13% Cr, and the balance of Al.

[0032] Step 2, the 6061 aluminum alloy plate is pretreated before the experiment. The commercially available rolled 6061 aluminum alloy was cut into 130mm*200mm*10mm by wire electric discharge machine, and it was subjected to stress relief annealing at 510°C for 5 hours in a resistance furnace and cooled to room temperature with the furnace.

[0033] Step 3: Process the 6061 aluminum alloy into a suitable size. Cut the annealed 6061 aluminum alloy into sheet samples of 65mm*10mm*3mm with a wire electric discharge machine.

[0034] Step 4. The treatment method of combining traditional treatment and electric pulse tre...

Embodiment 2

[0041] Preparation of high ductility 6000 series aluminum alloy.

[0042] In this embodiment, a method for strengthening and toughening aluminum alloy based on pulse current includes the following steps:

[0043] Step 1: Obtain a 6061 aluminum alloy plate, the mass percentage of which is: 0.88% Mg, 0.64% Si, 0.43% Fe, 0.24% Cu, 0.13% Cr, and the balance of Al.

[0044] Step 2, the 6061 aluminum alloy plate is pretreated before the experiment. The commercially available rolled 6061 aluminum alloy was cut into 130mm*200mm*10mm by wire electric discharge machine, and it was subjected to stress relief annealing at 510°C for 5 hours in a resistance furnace and cooled to room temperature with the furnace.

[0045] Step 3: Process the 6061 aluminum alloy into a suitable size. Cut the 6061 aluminum alloy into sheet samples of 65mm*10mm*3mm with a wire electric discharge machine.

[0046] Step 4. The treatment method of combining traditional treatment and electric pulse treatment of...

Embodiment 3

[0053] Preparation of high-strength, high-plasticity 6000-series aluminum alloys.

[0054] In this embodiment, a method for strengthening and toughening aluminum alloy based on pulse current includes the following steps:

[0055] Step 1: Obtain a 6061 aluminum alloy plate, the mass percentage of which is: 0.88% Mg, 0.64% Si, 0.43% Fe, 0.24% Cu, 0.13% Cr, and the balance of Al.

[0056] Step 2, the 6061 aluminum alloy plate is pretreated before the experiment. The commercially available rolled 6061 aluminum alloy was cut into 130mm*200mm*10mm by wire electric discharge machine, and it was subjected to stress relief annealing at 510°C for 5 hours in a resistance furnace and cooled to room temperature with the furnace.

[0057] Step 3: Process the 6061 aluminum alloy into a suitable size. Cut the 6061 aluminum alloy into a sheet sample of 65mm*10mm*5mm with a wire electric discharge machine.

[0058] Step 4: Roll the 6061 aluminum alloy at room temperature with a reduction of ...

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Abstract

The invention discloses an aluminum alloy toughening method based on pulse current. The specific process is a treatment mode combining traditional treatment and electric pulse treatment on the aluminum alloy. The method has the characteristics of instantaneous speed, high energy, strong impact, extreme non-balance, multi-functionality and the like, the pulse current processing parameters are adjusted, the treatment effects of solid solution, aging, recrystallization and the like of the aluminum alloy can be realized by combining the cycle number, the mode and the cold control technology, so that different tissue structures and strong-toughness cooperation can be obtained, and the requirements of various service conditions can be met. Compared with a traditional sample which is subjected to solid solution artificial aging, according to the aluminum alloy treated by the treatment method, the nano-scale precipitation phase with the larger number and smaller size can be separated out in a short time, the comprehensive mechanical property can be greatly improved within millisecond scale, and the working efficiency is remarkably improved. The method can be applied to the fields of strong toughening of aluminum alloys and the like.

Description

technical field [0001] The invention relates to the technical field of material processing and preparation, and is mainly applied to the strengthening and toughening treatment of various industrial aluminum alloys. Background technique [0002] Aluminum alloy has good strength and plasticity, as well as excellent welding performance and corrosion resistance. It is widely used in automobiles, rail transit, aerospace and other fields. According to the strengthening method, it can be divided into heat-treated aluminum alloy and non-heat-treated aluminum alloy. alloy. The non-heat-treatable aluminum alloy type mainly improves the strength by refining grains and controlling recrystallization, while the heat-treatable aluminum alloy can effectively increase the strength by precipitation strengthening in addition to the above mechanism. However, with the continuous development of industrial technology, high-efficiency and short-process requirements are put forward for the processi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/047C22F1/057C22F3/00C22C21/08C22C21/16
CPCC22C21/08C22C21/16C22F1/047C22F1/057C22F3/00
Inventor 赵宇光王艺橦潘栋徐晓峰种雪颖
Owner JILIN UNIV
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