Thermal treatment method for improving performance of aluminum alloy and welding connector thereof

A heat treatment method and welding joint technology, applied in the field of aluminum alloy heat treatment, can solve the problems of joint fracture, reduce the mechanical properties of welded joints, etc., and achieve the effects of improving corrosion resistance, improving resistance to intergranular corrosion, and improving hardness

Inactive Publication Date: 2019-01-04
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The heat input generated during the A6N01S-T5 aluminum alloy welding process is equivalent to a short non-isothermal solution aging heat treatment for the material, which softens the heat-affected zone of the welded joint, making the joint easy to break in the heat-affected zone, and reducing the welded joint. mechanical properties

Method used

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  • Thermal treatment method for improving performance of aluminum alloy and welding connector thereof
  • Thermal treatment method for improving performance of aluminum alloy and welding connector thereof
  • Thermal treatment method for improving performance of aluminum alloy and welding connector thereof

Examples

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Embodiment 1

[0029] A heat treatment method for improving the properties of an aluminum alloy, the aluminum alloy described in this example is an A6N01S-T5 aluminum alloy profile with a thickness of 2-4mm; the heat treatment method includes: performing solid solution treatment on the A6N01S-T5 aluminum alloy profile in sequence , water quenching and aging treatment,

[0030] The specific method of the solution treatment is: set the furnace temperature to 550°C, first heat it to 450°C at a heating rate of 10°C / min and keep it for 15 minutes, then heat it to 550°C at a heating rate of 5°C / min, and wait for The temperature of the furnace is stabilized at 550°C. Put the A6N01S-T5 aluminum alloy profile into the furnace for solution treatment for 75 minutes; then take it out immediately, put it in water for quenching; then immediately put it into the furnace for aging heat treatment, the aging treatment temperature is 160°C, the aging treatment time is 4h; take it out and place it in the air to...

Embodiment 2

[0032] A heat treatment method for improving the properties of an aluminum alloy, the aluminum alloy described in this example is an A6N01S-T5 aluminum alloy profile with a thickness of 2-4mm; the heat treatment method includes: performing solid solution treatment on the A6N01S-T5 aluminum alloy profile in sequence , water quenching and aging treatment,

[0033] The specific method of the solution treatment is: set the furnace temperature to 530°C, first heat it to 450°C at a heating rate of 10°C / min and keep it for 15 minutes, then heat it to 530°C at a heating rate of 5°C / min, and wait for The temperature of the furnace is stabilized at 530°C. Put the A6N01S-T5 aluminum alloy profile into the furnace for solution treatment for 75 minutes; then take it out immediately and put it in water for quenching; then immediately put it into the furnace for aging heat treatment. The aging treatment temperature is 160°C, the aging treatment time is 6h; take it out and place it in the air...

Embodiment 3

[0039] A heat treatment method for improving the properties of an aluminum alloy, comprising sequentially performing solution treatment, water quenching and aging treatment on the aluminum alloy, the aluminum alloy described in this example is 6N01 aluminum alloy; the specific method of the solution treatment is: setting a furnace The temperature is 530°C, first heated to 450°C at a heating rate of 10°C / min and kept for 15 minutes, and then heated to 530°C at a heating rate of 5°C / min. Put it into the furnace for solution treatment for 90 minutes; then take it out immediately, put it into water for quenching; then put it into the furnace immediately for aging heat treatment, the aging treatment temperature is 155 ° C, and the aging treatment time is 10 hours; take it out and place it in the air Air cool to room temperature.

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Abstract

The invention discloses a thermal treatment method for improving performance of an aluminum alloy and a welding connector thereof. The thermal treatment method comprises the following step: sequentially carrying out solid dissolving treatment, water quenching and aging treatment on an aluminum alloy or a welding connector of the aluminum alloy. The thermal treatment method is characterized in thatthe aluminum alloy is a 6N01 aluminum alloy; the solid dissolving treatment temperature is 530-550 DEG C, the solid dissolving treatment time is 50-90 minutes, the aging treatment temperature is 155-180 DEG C, the aging treatment time is 2-13 hours, and the aluminum alloy is placed in the air for air cooling to the room temperature after the aging treatment. By adopting the method, thermal treatment modification is carried out on the 6N01 system aluminum alloys and welding connectors thereof, and on premise that the strength is not degraded, a breakage mode of the aluminum alloys is changed,and in addition, the intercrystalline corrosion resistance of the aluminum alloy can be improved.

Description

technical field [0001] The invention relates to a heat treatment method for improving the performance of aluminum alloys used in high-speed trains and joints thereof, and belongs to the technical field of aluminum alloy heat treatment. Background technique [0002] In recent years, China's high-speed rail has developed rapidly. China Railway has built the world's largest high-speed rail network, which has promoted exchanges between various regions, facilitated people's transportation, and played a vital role in the country's economic development. As high-speed trains are the most important carrier in high-speed railway transportation, the safety and service performance of car body manufacturing is particularly important. The high-speed train body is mainly made of aluminum alloy, which has low density and high specific strength, which can effectively reduce the weight of the car body and achieve the purpose of high-speed and safe operation. [0003] 6N01 aluminum alloy is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
CPCC22F1/002C22F1/04
Inventor 李远星邱思涪石鑫朱宗涛王尧陈辉金雨茜王志敏
Owner SOUTHWEST JIAOTONG UNIV
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