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Aluminum alloy and preparation method and application thereof, connecting piece for body frame of vehicle, and electric vehicle

A technology of aluminum alloy and connector, applied in the field of aluminum alloy and its preparation, can solve problems such as poor mechanical properties

Active Publication Date: 2018-04-03
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An object of the present disclosure is to provide an aluminum alloy and its preparation method and application, so as to overcome the defects of poor mechanical properties of traditional aluminum alloys

Method used

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  • Aluminum alloy and preparation method and application thereof, connecting piece for body frame of vehicle, and electric vehicle
  • Aluminum alloy and preparation method and application thereof, connecting piece for body frame of vehicle, and electric vehicle
  • Aluminum alloy and preparation method and application thereof, connecting piece for body frame of vehicle, and electric vehicle

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preparation example Construction

[0042] The method for preparing aluminum alloy provided in the second aspect of the present disclosure improves the traditional semi-solid forming process and develops a matching heat treatment process by improving the formula of the aluminum alloy, and solves the problem that the traditional preparation method cannot produce complex forming structures and high mechanical properties. The problem of aluminum alloy castings is solved, and the production cost is reduced at the same time.

[0043] The third aspect of the present disclosure provides an aluminum alloy prepared by the method of the second aspect of the present disclosure.

[0044] The fourth aspect of the present disclosure: provide the application of the aluminum alloy according to the first aspect or the third aspect of the present disclosure in vehicle body frame connectors.

[0045] The fifth aspect of the present disclosure: provide a vehicle body frame connecting piece, the vehicle body frame connecting piece i...

Embodiment 1

[0053] 6.3 parts by weight of Si, 0.55 parts by weight of Mg, 0.25 parts by weight of Cu, 0.1 parts by weight of Fe, 0.02 parts by weight of Mn, 0.15 parts by weight of Ti, 0.03 parts by weight of Zn and Al supplemented to 100 parts by weight Melt at 710°C for 8 hours; put the melted material in a crucible for ultrasonic vibration treatment and mechanical stirring treatment, the ultrasonic frequency is 30KHz, the ultrasonic vibration time is 9 seconds, the temperature is 690°C, and the ultrasonic vibration amplitude is 0.15 mm, the mechanical stirring speed is 1000r / min, and the mechanical stirring time is 9 seconds; pour the stirred material into the barrel, and squeeze it into the mold with a bottom-up squeeze casting machine (650 tons of tonnage) , the pressure is 60MPa, the injection speed is 0.2m / s; after the die-casting treatment, the sample nozzle and slag bag are removed, and the solid solution treatment is carried out at 525°C for 9 hours, and then the natural aging tr...

Embodiment 2

[0055] 6.1 parts by weight of Si, 0.51 parts by weight of Mg, 0.3 parts by weight of Cu, 0.07 parts by weight of Fe, 0.03 parts by weight of Mn, 0.1 parts by weight of Ti, 0.04 parts by weight of Zn and Al supplemented to 100 parts by weight Melt at 710°C for 8 hours; put the melted material in a crucible for ultrasonic vibration treatment and mechanical stirring treatment, the ultrasonic frequency is 60KHz, the ultrasonic vibration time is 1 minute, the temperature is 690°C, and the ultrasonic vibration amplitude is 0.1 mm, the mechanical stirring speed is 200r / min, and the mechanical stirring time is 60 seconds; pour the stirred material into the barrel, and squeeze it into the mold with a bottom-up squeeze casting machine (450 tons of tonnage) , the pressure is 100MPa, the injection speed is 0.4m / s; after the die-casting treatment, the sample nozzle and slag bag are removed, and the solid solution treatment is carried out at 520°C for 9h, and then the natural aging treatment...

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Abstract

The invention discloses aluminum alloy and a preparation method and application thereof, a connecting piece for the body frame of a vehicle, and an electric vehicle. The aluminum alloy comprises alloyelements, with the balance being elemental aluminum. The alloy elements are composed of, on the basis of the total weight of the aluminum alloy, 6 to 7 wt% of Si, 0.4 to 0.6 wt% of Mg, 0.2 to 0.4 wt%of Cu, no more than 0.12 wt% of Fe, no more than 0.05 wt% of Mn, no more than 0.2 wt% of Ti and no more than 0.05 wt% of Zn. The connecting piece prepared from the aluminum alloy can meet requirements on the structural strength of the body frame of the vehicle; the connecting piece can replace the traditional welding manner for connection of the body frame and realize rivet connection; and compared with a casting prepared by using a common pressure casting process, the connecting piece provided by the invention has better performance under the condition of same cost.

Description

technical field [0001] The disclosure relates to an aluminum alloy, a preparation method and application thereof, a vehicle body frame connector and an electric vehicle. Background technique [0002] The skeletons of current electric city buses are all steel skeletons. The steel structure makes the buses heavy, which leads to at least dozens of passengers less than ordinary fuel city buses. In addition, the steel frame is easy to rust, even after phosphating treatment, the life of the steel frame is only about 8 years, and it cannot be recycled, and the phosphating process will also pollute the environment. With the needs of environmental protection and energy saving, the lightweight of automobiles has become the trend of automobile development in the world, and the lightweight of automobile skeletons and automobile castings has also become one of the important development directions of automobiles. The use of light alloy materials such as aluminum and magnesium is currentl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/02B22D17/00
CPCB22D17/00C22C1/026C22C21/02
Inventor 菅永喜张春萌郭强文丹华
Owner BYD CO LTD
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