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Plastic machining method for improving comprehensive mechanical performance of 2A14 aluminum alloy plate material

A technology of aluminum alloy plate and comprehensive mechanics, which is applied in the field of aluminum alloy processing, can solve the problems of poor comprehensive mechanical properties of aluminum alloy, and achieve the effects of shortening high temperature residence time, improving fluidity and uniform plastic rheology

Active Publication Date: 2019-10-08
JIANGSU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defects of poor comprehensive mechanical properties of aluminum alloys existing in the prior art, the present invention provides a plastic processing method for improving the comprehensive mechanical properties of 2A14 aluminum alloy plates, through the as-cast state that can be strengthened by heat treatment before friction stir processing The homogenization treatment of aluminum alloy plates can effectively eliminate various casting structural defects, control the heat input and heat dissipation rate in the friction stir processing process, effectively control the microstructure of the friction stir processing area, and significantly improve the comprehensive performance of the friction stir processing area. mechanical properties

Method used

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  • Plastic machining method for improving comprehensive mechanical performance of 2A14 aluminum alloy plate material
  • Plastic machining method for improving comprehensive mechanical performance of 2A14 aluminum alloy plate material
  • Plastic machining method for improving comprehensive mechanical performance of 2A14 aluminum alloy plate material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Homogenization treatment: saw the as-cast 2A14 aluminum alloy sheet to be processed according to the equipment size requirements to 150mm×300mm×5mm, put the sawed sheet in a furnace at room temperature, and homogenize it at 480°C for 12 hours. Cool the furnace to 160±2°C, then take it out of the heat treatment furnace and air cool to room temperature;

[0028] Surface treatment: After the homogenization treatment, the surface of the 2A14 aluminum alloy plate to be processed is polished with a grinder, cleaned physically (water-based cleaning agent), rinsed with water, and then dried with a hair dryer for later use;

[0029] Friction stir processing: clamp the surface-treated 2A14 aluminum alloy plate to the friction stir welding equipment for single-pass friction stir processing, and instantaneously force cooling. The cooling liquid is flowing water at 24±2°C for edge friction stir processing Cool on the side.

[0030] Machining treatment: The 2A14 aluminum alloy sheet...

Embodiment 2

[0032] Homogenization treatment: saw the as-cast 2A14 aluminum alloy plate to be processed according to the equipment size requirements to 150mm×300mm×5mm, put the sawed plate in a furnace at room temperature, and homogenize it at 460°C for 14 hours. Cool the furnace to 160±2°C, then take it out of the heat treatment furnace and air cool to room temperature;

[0033] Surface treatment: Use a grinder to polish the surface of the homogenized 2A14 aluminum alloy plate to be processed, rinse it with water after physical cleaning, and then dry it with a hair dryer for later use;

[0034] Friction stir processing: Clamp the surface-treated 2A14 aluminum alloy plate to the friction stir welding equipment for single-pass friction stir processing and instantaneous forced cooling. The cooling liquid is flowing water at 24±2°C. cool down.

[0035] Machining treatment: The 2A14 aluminum alloy sheet after friction stir processing is machined to remove the non-friction stir processing area...

Embodiment 3

[0037] Homogenization treatment: saw the as-cast 2A14 aluminum alloy plate to be processed according to the equipment size requirements to 150mm×300mm×5mm, put the sawed plate in a furnace at room temperature, and homogenize it at 490°C for 10 hours. Cool the furnace to 160±2°C, then take it out of the heat treatment furnace and air cool to room temperature;

[0038] Surface treatment: After the homogenization treatment, the surface of the area to be processed of the 2A14 aluminum alloy plate is polished with a grinder, washed with water after physical cleaning, and then dried with a hair dryer for later use;

[0039] Friction stir processing: Clamp the surface-treated 2A14 aluminum alloy plate to the friction stir welding equipment for single-pass friction stir processing and instantaneous forced cooling. The cooling liquid is flowing ice water at 2±2°C for edge friction stir processing Cool on the side.

[0040] Machining treatment: The 2A14 aluminum alloy sheet after frict...

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Abstract

The invention belongs to the technical field of aluminum alloy machining and particularly relates to a plastic machining method for improving the comprehensive mechanical performance of a 2A14 aluminum alloy plate material. The method includes the steps of: (1) homogenization treatment, specifically, homogenization treatment is performed on a to-be-machined as-cast aluminum alloy plate: (2) surface treatment, specifically, the surface of the aluminum alloy plate after homogenization treatment is subjected to grinding treatment and physical cleaning; (3) stirring friction, specifically, the aluminum alloy plate after surface treatment is subjected to single-pass stirring friction machining, and instant forced cooling is performed; and (4) machining treatment, specifically, the aluminum alloy plate after stirring friction is subjected to machining so that a non-stirring friction area can be removed, and grinding treatment is performed. According to the method, due to the fact that the homogenization treatment is performed on the as-cast aluminum alloy plate capable of being subjected to heat treatment reinforcing before stirring friction, various casting structure defects are effectively eliminated, the heat input amount and the heat dissipating rate in the stirring friction machining process are controlled, the structure shape of a stirring friction area is effectively adjustedand controlled, and the comprehensive mechanical performance of the stirring friction area is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy processing, and in particular relates to a plastic processing method for improving the comprehensive mechanical properties of 2A14 aluminum alloy plates. Background technique [0002] As an important structural load-bearing material for aerospace, military industry and transportation, 2A14 aluminum alloy has the advantages of good process performance, good thermoplasticity and high working temperature. It is mainly used for heat-resistant and weldable structural parts, forgings with complex shapes, precision Die forgings and plates, etc. Although the emergence of titanium, titanium alloys and composite materials has had a certain impact on the application of aluminum alloys, the overall performance meets the load-bearing requirements, and the status of high-performance plates with excellent local performance as the main load-bearing material has basically remained unchanged. [0003] Grain...

Claims

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Application Information

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IPC IPC(8): C22F1/04C22F3/00
CPCC22F1/04C22F3/00
Inventor 王健卢雅琳周东帅李仁兴姚晓洪徐文婷
Owner JIANGSU UNIVERSITY OF TECHNOLOGY
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