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Strain aging method for improving mechanical properties of aluminum alloy

An aging method and aluminum alloy technology, which is applied in the field of material processing, can solve the problems of difficult precipitation of β″ phase, poor aging strengthening effect, and low aging temperature, so as to achieve easy operation, low processing cost, and high tensile strength and yield strength effect

Inactive Publication Date: 2015-09-16
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aging temperature is low, only atomic clusters with weak strengthening effect can be precipitated, it is difficult to precipitate β″ phase, and the aging strengthening effect is poor

Method used

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  • Strain aging method for improving mechanical properties of aluminum alloy
  • Strain aging method for improving mechanical properties of aluminum alloy
  • Strain aging method for improving mechanical properties of aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 A deformation aging method for improving the mechanical properties of aluminum alloys, comprising the steps of:

[0026] 1) 6016 aluminum alloy was used for heat treatment, and the 6016 aluminum alloy was heat-treated in an air furnace at 520°C for 60 minutes for solid solution treatment;

[0027] 2) Water-cooling and quenching the solid-solution aluminum alloy in step 1) to room temperature;

[0028]3) Perform pre-aging treatment on the aluminum alloy material quenched in step 2) at 180°C, and keep it warm for 10 minutes, so that the aluminum alloy material is in an under-aging state;

[0029] 4) After immersing the aluminum alloy material treated in step 3) in liquid nitrogen for 30 min, carry out multi-pass low-temperature rolling, immediately put the aluminum alloy material back into liquid nitrogen for 8 min after each rolling pass, and then Carry out the next pass of rolling to keep the temperature of the aluminum alloy material at -150°C~-180°C durin...

Embodiment 2

[0042] Example 2 A deformation aging method for improving the mechanical properties of aluminum alloys, comprising the steps of:

[0043] 1) 6061 aluminum alloy is used for heat treatment, and the 6061 aluminum alloy is kept at 560°C in an air furnace for 20 minutes for solid solution treatment;

[0044] 2) Water-cooling and quenching the solid-solution aluminum alloy in step 1) to room temperature;

[0045] 3) Perform pre-aging treatment on the aluminum alloy material after quenching in step 2) at 170°C, and keep it warm for 20 minutes, so that the aluminum alloy material is in an under-aging state;

[0046] 4) After immersing the aluminum alloy material treated in step 3) in liquid nitrogen for 30 min, perform multi-pass low-temperature rolling, immediately put the aluminum alloy material back into liquid nitrogen for 10 min after each rolling pass, and then Carry out the next pass of rolling to keep the temperature of the aluminum alloy material at -150...

Embodiment 3

[0049] Example 3 A deformation aging method for improving the mechanical properties of aluminum alloys, comprising the steps of:

[0050] 1) 6063 aluminum alloy was used for heat treatment, and the 6063 aluminum alloy was heat-treated in an air furnace at 550°C for 30 minutes for solid solution treatment;

[0051] 2) Water-cooling and quenching the solid-solution aluminum alloy in step 1) to room temperature;

[0052] 3) Perform pre-aging treatment on the aluminum alloy material quenched in step 2) at 150°C, and keep it warm for 30 minutes, so that the aluminum alloy material is in an under-aging state;

[0053] 4) After immersing the aluminum alloy material treated in step 3) in liquid nitrogen for 20 min, perform multi-pass low-temperature rolling, immediately put the aluminum alloy material back into liquid nitrogen for 10 min after each pass of rolling, and then Carry out the next pass of rolling to keep the temperature of the aluminum alloy material at -1...

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Abstract

The invention discloses a strain aging method for improving the mechanical properties of aluminum alloy. The strain aging method comprises the following steps: the aluminum alloy is subjected to the solution treatment for 20-60 min at 520-560 DEG C; the aluminum alloy material after the solution treatment is water-cooled and quenched to room temperature; the aluminum alloy is subjected to the pre-aging treatment for 10-30 min at 150-180 DEG C so that the aluminum alloy material is in an underaged state; the aluminum alloy material after the pre-aging treatment is immersed in liquid nitrogen for 20-30 min and then is subjected to the multi-pass low-temperature rolling; finally, the rolled aluminum alloy material is subjected to the low-temperature reaging treatment for 85-100 hours at 100-130 DEG C so as to further strengthen the aluminum alloy. According to the invention, the strain aging method effectively improves the tensile strength and yield strength of aluminum alloy, is simple in process, easy to operate and low in cost, and has good generalizability.

Description

technical field [0001] The invention belongs to the technical field of material processing, and in particular relates to a deformation aging method for improving the mechanical properties of aluminum alloys. Background technique [0002] The energy crisis and the increasingly serious environmental pollution have promoted the development of lightweight structures, and it has become a major trend to replace steel materials with aluminum alloys in various structural products. Among them, the 6000 series aluminum alloy has the advantages of medium strength, high corrosion resistance, no tendency to stress corrosion cracking, good welding performance, constant corrosion performance in the welding zone, good formability and process performance, and is widely used in construction, transportation, etc. Gradually increasing, especially in the automobile manufacturing industry, the promotion and application of aluminum alloys has become an important topic in the current industry. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
Inventor 陈兴品徐越鹏孙洪福陈丹李晓光梅霖
Owner CHONGQING UNIV
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