Heat treatment technology for preparing high-performance low-residual stress aluminum alloy

A residual stress and aluminum alloy technology is applied in the field of heat treatment for preparing high-performance low residual stress aluminum alloys. It can solve the problems of consuming material plastic reserve, increasing plastic deformation, and demanding material shape and size, and achieves fast heating speed and reduced heat loss. The effect of small lattice distortion and good high temperature environment

Active Publication Date: 2018-09-14
HUNAN UNIV OF HUMANITIES SCI & TECH +1
View PDF8 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical method of eliminating residual stress has a certain effect, but the mechanical method of eliminating residual stress is at the cost of incr

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
  • Heat treatment technology for preparing high-performance low-residual stress aluminum alloy
  • Heat treatment technology for preparing high-performance low-residual stress aluminum alloy
  • Heat treatment technology for preparing high-performance low-residual stress aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0046] Example 1

[0047] The 2xxx series alloy cold-rolled sheet with a sample thickness of 6mm is used, and the alloy composition is Al-4.45Cu-1.5Mg-0.54Mn (mass fraction%). First, put the sample in an air furnace at a temperature of 495℃ for 1h; then, the sample is quenched at a low temperature, and the quenched sample is subjected to cryogenic deformation treatment with a deformation of 10%; after the cryogenic deformation treatment Immediately put it in a heat medium at 150℃ for 12 minutes, and use a vibration exciter to vibrate it. The dynamic stress provided by the exciter is 55MPa. Finally, the aging treatment is carried out. The aging temperature is 120℃ and the time is 45h. The yield strength, tensile strength, elongation, residual stress measurement value, and residual stress reduction rate of the 2xxx alloy treated in this embodiment are shown in Table 1.

Example Embodiment

[0048] Example 2

[0049] The 2xxx series alloy cold-rolled sheet with a sample thickness of 6mm is used, and the alloy composition is Al-4.45Cu-1.5Mg-0.54Mn (mass fraction%). First, put the sample in an air furnace with a temperature of 485℃ for 1h; then, the sample is subjected to low temperature quenching, and then the quenched sample is subjected to cryogenic deformation treatment, the deformation amount is 25%; after the cryogenic deformation treatment Immediately put it into a heat medium at 180°C for 10 minutes, and use a vibration exciter to vibrate it. The dynamic stress provided by the exciter is 75MPa. Finally, the aging treatment is carried out. The aging temperature is 170°C and the time is 16h. The yield strength, tensile strength, elongation, residual stress measurement value, and residual stress reduction rate of the 2xxx alloy treated in this embodiment are shown in Table 1.

Example Embodiment

[0050] Example 3

[0051] The 2xxx series alloy cold-rolled sheet with a sample thickness of 6mm is used, and the alloy composition is Al-4.45Cu-1.5Mg-0.54Mn (mass fraction%). First, put the sample in an air furnace with a temperature of 500℃ for 1h; then, the sample is quenched at a low temperature, and the quenched sample is subjected to cryogenic deformation treatment with a deformation of 40%; after the cryogenic deformation treatment Immediately put it in a 200℃ heat medium for 8 minutes, and use a vibration exciter to vibrate it. The dynamic stress provided by the vibration exciter is 84MPa; finally, it is aging treatment, the aging temperature is 200℃, and the time is 1.5h. The yield strength, tensile strength, elongation, residual stress measurement value, and residual stress reduction rate of the 2xxx alloy treated in this embodiment are shown in Table 1.

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

No PUM Login to view more

Abstract

The invention relates to a heat treatment technology for preparing a high-performance low-residual stress aluminum alloy, and belongs to the technical field of aluminum alloy thermomechanical treatment. The method comprises the steps that 1, after an aluminum alloy sample is subjected to solution treatment and heat preservation, then is subjected to low-temperature quenching, and the transfer timedoes not exceed 10 seconds; 2, the sample obtained in the step 1 is subjected to cryogenic deformation to obtain a cryogenic deformation sample, the cryogenic deformation treatment temperature is lower than minus 120 DEG C, and the cryogenic deformation is equal or greater than 5%; 3, the cryogenic deformation sample obtained in the step 2 is put into a hot medium, the cryogenic deformation sample is vibrated by a vibration exciter, heat preservation and vibration maintaining are carried out, and the sample after the vibration reverse quenching treatment is obtained; and 4, the sample after the vibration reverse quenching treatment in the step 3 is subjected to aging treatment, and a finished product is obtained. The aluminum alloy prepared by the heat treatment technology has high comprehensive performance and low residual stress, and the stability of the material in service process is remarkably improved.

Description

technical field [0001] The invention relates to a heat treatment technology for preparing an aluminum alloy with high performance and low residual stress, which can effectively improve the strength and plasticity of the aluminum alloy and significantly reduce the residual stress; it belongs to the technical field of aluminum alloy thermomechanical treatment. technical background [0002] As a non-ferrous metal structural material with excellent performance, aluminum alloy has been widely used in aerospace, automobile, ship and other fields. The rapid development of global social economy and science and technology has put forward higher and higher requirements for the performance of aluminum alloys, and the research on aluminum alloys has also deepened. [0003] The application of aluminum alloys in industry is increasing year by year, but the quality of finished products is uneven. It is imperative to produce high-quality aluminum alloy materials. With the continuous progr...

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
IPC IPC(8): C22F1/057C22F1/043C22F1/047C22F1/05C22C21/16C22C21/02C22C21/08
CPCC22C21/02C22C21/08C22C21/16C22F1/002C22F1/043C22F1/047C22F1/05C22F1/057
Inventor 陈志国马文静袁珍贵
Owner HUNAN UNIV OF HUMANITIES SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap