Unlock instant, AI-driven research and patent intelligence for your innovation.

Deformation heat treatment method for obtaining composite nanostructure in aluminum alloy material

A technology of composite nanostructure and aluminum alloy material, applied in the field of material processing, can solve the problems of reducing the room temperature formability of the material, not suitable for room temperature cold rolling, poor room temperature formability, etc., to achieve good generalizability, inhibit dynamic precipitation, reduce rolling The effect of suppressing deformation heat

Active Publication Date: 2021-02-19
GUIZHOU POWER GRID CO LTD
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, it is difficult to produce large-sized samples by equal channel extrusion and high-pressure torsion, and the plates are prone to separation during cumulative stacking, making these methods difficult to achieve mass production in industry
[0004] Precipitation-strengthened 2-series and 7-series aluminum alloys are the most commonly used aluminum alloys. In the T6 state (artificial aging state after solution treatment), this type of aluminum alloy has high strength and hardness and poor room temperature formability. Suitable for room temperature cold rolling
However, when the solid solution state is used for cold rolling, dynamic precipitation is easy to occur due to the rolling heat, which will also significantly reduce the room temperature formability of this type of material
At present, there are plans to use liquid nitrogen rolling to improve the formability of precipitation-strengthened high-strength aluminum alloys. However, during liquid nitrogen rolling, the plate to be processed needs to be pretreated by soaking in liquid nitrogen, or rolled directly in liquid nitrogen. The method has high energy consumption and poor implementation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Deformation heat treatment method for obtaining composite nanostructure in aluminum alloy material
  • Deformation heat treatment method for obtaining composite nanostructure in aluminum alloy material
  • Deformation heat treatment method for obtaining composite nanostructure in aluminum alloy material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] see figure 1 , a kind of deformation heat treatment method that the present invention obtains composite nanostructure in aluminum alloy material, this method comprises the following steps:

[0033] 1) Insulate an Al-Cu-Mn alloy plate with an initial thickness of 5mm at 540°C for 14h to make it reach a supersaturated solid solution state;

[0034] 2) Pre-aging the plate after solution treatment in step 1) at 160° C. for 1 hour;

[0035] 3) After the plate after the pre-aging treatment in step 2) is water-cooled to room temperature, carry out 10 rolling deformations of cold water protection, and the deformation amount is 90%;

[0036] 4) The plate deformed in step 3) is subjected to low-temperature annealing treatment at 100° C. for 20 hours.

Embodiment 2

[0038] see figure 1 , a kind of deformation heat treatment method that the present invention obtains composite nanostructure in aluminum alloy material, this method comprises the following steps:

[0039] 1) Insulate an Al-Cu-Mn alloy plate with an initial thickness of 5mm at 560°C for 13h to make it reach a supersaturated solid solution state;

[0040] 2) Pre-aging the plate after solution treatment in step 1) at 130° C. for 3 hours;

[0041] 3) After the plate after the pre-aging treatment in step 2) is water-cooled to room temperature, carry out 10 rolling deformations of cold water protection, and the deformation amount is 70%;

[0042] 4) The plate deformed in step 3) is subjected to low-temperature annealing treatment at 160° C. for 25 hours.

Embodiment 3

[0044] see figure 1 , a kind of deformation heat treatment method that the present invention obtains composite nanostructure in aluminum alloy material, this method comprises the following steps:

[0045] 1) Insulate an Al-Cu-Mn alloy plate with an initial thickness of 5mm at 520°C for 16h to make it reach a supersaturated solid solution state;

[0046] 2) Pre-aging the plate after solution treatment in step 1) at 140° C. for 2 hours;

[0047] 3) After the plate after the pre-aging treatment in step 2) is water-cooled to room temperature, carry out 10 rolling deformations of cold water protection, and the amount of deformation is 80%;

[0048] 4) The plate deformed in step 3) is subjected to low-temperature annealing treatment at 160° C. for 10 hours.

[0049] The fine-grained state samples obtained in Examples 1 to 3 were observed for microstructure. The observation surface was the surface of the sample, which was smoothed by sandpaper water grinding, and a 200 μm thin slic...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a deformation heat treatment method for obtaining a composite nanostructure in an aluminum alloy material. The deformation heat treatment method comprises the following steps that 1) an initial material is subjected to solution treatment, specifically, the structure of the initial alloy material is enabled to reach a supersaturated solution state through the solution treatment; 2) aging pre-precipitation is conducted, specifically, after aging treatment is conducted after the aluminum alloy material subjected to solution treatment is cooled to room temperature; 3) rolling deformation treatment is conducted, specifically, the aluminum alloy material subjected to aging treatment is cooled to the room temperature and then subjected to multi-pass rolling deformation under cold water protection; and 4) low-temperature annealing treatment is conducted, specifically, the rolled and deformed aluminum alloy material is subjected to low-temperature annealing treatment. The method is a processing method capable of industrially producing nano-plates, a composite structure of nanocrystalline and nano-precipitate is constructed through severe plastic deformation and annealing treatment, and the strength, plasticity and toughness of the material are remarkably improved while the formability of the material is improved.

Description

technical field [0001] The invention relates to a deformation heat treatment method for obtaining a composite nanostructure in an aluminum alloy material, and belongs to the technical field of material processing. Background technique [0002] Aluminum alloys are widely used in the automotive industry, aerospace and other fields because of their light weight, abundant resources and good machinability. The existing traditional heat treatment methods can no longer meet the needs of industrial development. Microstructure refinement has been proved to be an effective means to improve the performance of aluminum alloy materials. Therefore, in order to produce high-quality aluminum alloys, it is particularly important to refine aluminum alloy materials. [0003] In recent years, research on microstructure refinement has mainly focused on large plastic deformation techniques (Severe plastic deformation, SPD), such as equal channel extrusion (ECAP), cumulative stack rolling (ARB),...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C22F1/057
CPCC22F1/04C22F1/057
Inventor 李波杨明刘卓毅樊磊何锦航谢百明冯可
Owner GUIZHOU POWER GRID CO LTD