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

A thermomechanical treatment process for obtaining high comprehensive performance of aluminum-copper-magnesium alloy

A technology of thermo-mechanical treatment and comprehensive performance, applied in the field of thermo-mechanical treatment of aluminum alloys, can solve the problems of difficult aluminum alloy strength and plastic toughness, unfavorable damage resistance, complexity, etc., so as to inhibit the precipitation of solute atoms and avoid secondary solidification. The effect of solution treatment and process simplification

Active Publication Date: 2018-07-27
HUNAN UNIV OF HUMANITIES SCI & TECH +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the above process, the strength of aluminum alloy can be effectively improved, but it is difficult to achieve the balance between the strength and ductility of aluminum alloy, especially for the large-size precipitates obtained by overaging for grain refinement in traditional thermomechanical treatment. It is eliminated by secondary solid solution, and the secondary solid solution will completely restore and disappear the microstructure such as dislocations generated by deformation, which is not conducive to the formation of dislocation substructures during subsequent aging treatment, and is not conducive to the improvement of its damage resistance , resulting in damage to the aluminum alloy due to external forces during use, causing its performance to decline or even fail
In addition, the traditional thermomechanical treatment process is often long and complicated, and the process cost is high

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
  • A thermomechanical treatment process for obtaining high comprehensive performance of aluminum-copper-magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] An aluminum-copper-magnesium alloy cold-rolled plate with a sample thickness of 12 mm is used, and its alloy composition is Al-4.45Cu-1.5Mg-0.54Mn (mass fraction %). First, put the sample in an air furnace at 493°C for 1 hour; then take the sample out of the air furnace and cool it to the starting temperature of 470°C in the air for hot rolling deformation treatment, and the final rolling temperature is 450°C, the deformation amount is 30%; water quenching is carried out immediately after hot rolling; the sample after water quenching is subjected to cryogenic deformation treatment, and the sample is soaked in liquid nitrogen for 15 minutes to make the temperature drop to -185°C before rolling , the deformation amount is 80%; artificial aging is carried out after the cryogenic deformation treatment, the aging temperature is 120 ℃, and the time is 45h. Yield strength, tensile strength, elongation, fracture toughness (K q ) parameters are shown in Table 1.

Embodiment 2

[0048] An aluminum-copper-magnesium alloy cold-rolled plate with a sample thickness of 12 mm is used, and its alloy composition is Al-4.45Cu-1.5Mg-0.54Mn (mass fraction %). First, put the sample in an air furnace at 485°C for 1 hour; then take the sample out of the air furnace and cool it to the starting temperature of 455°C in the air for hot rolling deformation treatment, and the final rolling temperature is 440°C, the deformation is 50%; water quenching is carried out immediately after hot rolling; the sample after water quenching is subjected to cryogenic deformation treatment, and the sample is soaked in liquid nitrogen for 10 minutes to make the temperature drop to -155°C before rolling , the deformation amount is 60%; artificial aging is carried out after the room temperature rolling treatment, the aging temperature is 170 ℃, and the time is 16h. Yield strength, tensile strength, elongation, fracture toughness (K q ) parameters are shown in Table 1.

Embodiment 3

[0050] An aluminum-copper-magnesium alloy cold-rolled plate with a sample thickness of 12 mm is used, and its alloy composition is Al-4.45Cu-1.5Mg-0.54Mn (mass fraction %). First, put the sample into an air furnace at 500 °C for 1 h; then take the sample out of the air furnace and cool it to the starting temperature of 480 °C in the air for hot rolling deformation treatment, and the final rolling temperature is 465°C, the deformation is 70%; water quenching is carried out immediately after hot rolling; the sample after water quenching is subjected to cryogenic deformation treatment, and the sample is soaked in liquid nitrogen for 5 minutes to make the temperature drop to -120°C before rolling , the deformation amount is 40%; artificial aging is carried out after the room temperature rolling treatment, the aging temperature is 200 ℃, and the time is 6h. Yield strength, tensile strength, elongation, fracture toughness (K q ) parameters 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

PropertyMeasurementUnit
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
elongationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a novel hot mechanical treatment process for realizing high comprehensive performance of aluminum copper and magnesium alloy, and belongs to the technical field of aluminum alloy hot mechanical treatment. The method comprises the following processes of solid solution and hot rolling continuous treatment, deep cooling deformation and aging treatment. The process has the advantages that the procedures of solid solution, aging, deformation, solid solution, manual aging and the like of the conventional hot mechanical treatment are changed, so that the technical flow process is simple; the implementation is easy; the deep cooling deformation and aging treatment are combined, so that the intensity of the aluminum alloy is improved on the premise of maintaining the good plastic toughness of the aluminum alloy; the anti-fatigue performance of the aluminum copper and magnesium alloy is improved. The process provided by the invention is applicable to industrial application.

Description

Technical field: [0001] The invention relates to a thermomechanical treatment process for obtaining high comprehensive performance of an aluminum-copper-magnesium alloy, which can effectively improve the comprehensive performance of the aluminum-copper-magnesium alloy; it belongs to the technical field of aluminum alloy thermomechanical treatment. technical background: [0002] With the development of the global social economy, in order to meet the needs of human development, the industry has higher and higher requirements for the performance of the materials used. As a metal material with high specific strength, high specific stiffness, good plasticity and toughness, and good processing performance, aluminum alloy is widely used in aerospace, automobile and other fields. [0003] my country's aluminum alloy output is huge, but there are many quality problems. At present, in my country's industry, more and more aluminum alloy materials are required to have good comprehensiv...

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 Patents(China)
IPC IPC(8): C22F1/057C22F1/047C22C21/16C22C21/06
CPCC22C21/06C22C21/16C22F1/047C22F1/057
Inventor 陈志国彭景任杰克
Owner HUNAN UNIV OF HUMANITIES SCI & TECH