Method for simultaneously improving strength and percentage elongation of aluminum alloy

A technology of elongation and aluminum alloy, which is applied in the field of plastic deformation and heat treatment of metal materials, can solve the problems of extrusion equipment capacity limitation, coarsening, limited deformation, etc., achieve excellent comprehensive performance, improve strength and elongation, and tensile strength The effect of strength and elongation improvement

Active Publication Date: 2017-12-19
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can achieve precise control of the shape, it is limited by the capacity of the extrusion equipment, and the amount of deformation in a single extrusion is limited. To obtain a larger amount of deformation, a secondary extrusion deformation is required.
However, in the traditional forward extrusion process, the extrusion deformation is uneven, and the secondary extrusion will cause the structure of the extruded product to be uneven or even coarse, resulting in unstable performance

Method used

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  • Method for simultaneously improving strength and percentage elongation of aluminum alloy
  • Method for simultaneously improving strength and percentage elongation of aluminum alloy
  • Method for simultaneously improving strength and percentage elongation of aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Three Al-Cu-Mg alloys through DC casting (direct water-cooled semi-continuous casting). %, Mg: 1.41%, Mn: 0.64%, Fe: 0.17%, Si: 0.09%, Zn: 0.0074%, Ti: 0.06%, Cr: 0.02%, and the balance is Al. The deformation heat treatment methods adopted by the three aluminum alloy ingots are as follows.

[0036] Bar A

[0037] After the Al-Cu-Mg alloy casting, the homogenization annealing treatment is carried out, the Al-Cu-Mg alloy is heated for 10h to 450°C, and the heat preservation is started; the homogenization treatment temperature is 450°C, the heat preservation time is 12h, and then cooled in the air to Room temperature; reheat the alloy to 450°C, keep it warm for 4 hours, start extrusion (reverse extrusion), the initial temperature of extrusion is 450°C, and the temperature after extrusion is 390°C, then cool to room temperature in air, The diameter of the aluminum alloy rod after extrusion is Φ50mm. Then carry out solid solution treatment, the solution treatment temperat...

Embodiment 2

[0048] Three Al-Cu-Mg alloys through DC casting (direct water-cooled semi-continuous casting). %, Mg: 1.41%, Mn: 0.64%, Fe: 0.17%, Si: 0.09%, Zn: 0.0074%, Ti: 0.06%, Cr: 0.02%, and the balance is Al. The deformation heat treatment methods adopted by the three aluminum alloy ingots are as follows.

[0049] Bar A

[0050] After the Al-Cu-Mg alloy casting, the homogenization annealing treatment is carried out, the Al-Cu-Mg alloy is heated for 10h to 450°C, and the heat preservation is started; the homogenization treatment temperature is 450°C, the heat preservation time is 12h, and then cooled in the air to Room temperature; reheat the alloy to 450°C, keep it warm for 4 hours, start extrusion (reverse extrusion), the initial temperature of extrusion is 450°C, and the temperature after extrusion is 390°C, then cool to room temperature in air, The diameter of the aluminum alloy rod after extrusion is Φ50mm. Then carry out solid solution treatment, the solution treatment temperat...

Embodiment 3

[0060] Three Al-Cu-Mg series alloys through DC casting (direct water-cooled semi-continuous casting), the diameter of the aluminum alloy rod is Φ152mm, and the diameter of the rear of the car is Φ150mm; the chemical composition of the Al-Cu-Mg alloy is as follows: Cu: 4.50 %, Mg: 1.75%, Mn: 0.74%, Fe: 0.15%, Si: 0.04%, Zn: 0.0056%, Ti: 0.043%, Cr: 0.015%, and the balance is Al. The processing methods of the three aluminum alloy ingots are as follows.

[0061] Bar E

[0062] After the Al-Cu-Mg alloy casting, the homogenization annealing treatment is carried out, the Al-Cu-Mg alloy is heated for 10h to 450°C, and the heat preservation is started; the homogenization treatment temperature is 450°C, the heat preservation time is 12h, and then cooled in the air to Room temperature; heat the alloy to 450°C, keep it warm for 4 hours, start extrusion (reverse extrusion), the initial temperature of extrusion is 450°C, the temperature after extrusion is 390°C, the diameter of the alumin...

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Abstract

The invention belongs to the technical field of metal material plastic deformation and heat treatment, and relates to a method for simultaneously improving the strength and the percentage elongation of aluminum alloy, in particular to a thermomechanical treatment method for simultaneously improving the strength, the percentage elongation and other comprehensive properties of Al-Cu-Mg alloy. The method for simultaneously improving the strength and the percentage elongation of the aluminum alloy is characterized by comprising the steps that an Al-Cu-Mg series alloy ingot is subjected to primary extrusion and then subjected to homogenizing annealing treatment, secondary extrusion is conducted after homogenizing annealing treatment, and after a product with the required size and specification is manufactured, solution and aging treatment is conducted. According to the method, existing equipment in the aluminum machining industry is utilized, the tensile strength and the percentage elongation of the aluminum alloy are simultaneously improved by changing the thermomechanical treatment technology, and a high-quality aluminum extruded material is obtained.

Description

technical field [0001] The invention belongs to the technical field of plastic deformation and heat treatment of metal materials, and relates to a method for simultaneously improving the strength and elongation of an aluminum alloy, in particular to a deformation heat treatment method for simultaneously improving the comprehensive performance of the strength and elongation of an Al-Cu-Mg alloy. Background technique [0002] Aluminum alloy has a series of excellent characteristics such as light weight, high strength, corrosion resistance and plasticity, and is the most widely used non-ferrous metal structural material. Aluminum alloys have been widely used in aerospace, aviation, automobiles, machinery manufacturing, ships, high-speed rail, nuclear industry, construction, sporting goods and many other fields. [0003] With the development of new alloys and the improvement of preparation technology, the comprehensive performance of aluminum alloys has been continuously improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/057C22C21/14C22C21/16C22C21/18
CPCC22C21/14C22C21/16C22C21/18C22F1/002C22F1/057
Inventor 朱庆丰赵志浩楚朝阳王嘉王高松左玉波
Owner NORTHEASTERN UNIV
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