In-situ nanometer intensified aluminum alloy wheel hub for new energy automobile and manufacturing method thereof

A technology for new energy vehicles and aluminum alloy wheels. It is applied in the direction of wheels, hubs, and vehicle parts. It can solve the problems of easy agglomeration of nanoparticles, difficult control of rare earth content, and increased material costs, so as to enhance the feeding effect and enhance battery life. , the effect of improving safety

Active Publication Date: 2018-09-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned process technology still has the following shortcomings and deficiencies: (1) the use of a large number of expensive rare earth elements increases the cost of material manufacturing; (2) relying on traditional alloy precipitation strengthening to improve the strong plasticity of materials is limited, It is often to reduce the plasticity and improve the strength; (3) the content of rare earth is difficult to c

Method used

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  • In-situ nanometer intensified aluminum alloy wheel hub for new energy automobile and manufacturing method thereof
  • In-situ nanometer intensified aluminum alloy wheel hub for new energy automobile and manufacturing method thereof
  • In-situ nanometer intensified aluminum alloy wheel hub for new energy automobile and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of in-situ nanoparticle-reinforced composite materials: Melt 100Kg of commercial A356.2 alloy raw material at 750°C and keep it warm for 10min. When the temperature continues to rise to 850°C, add in batches K 2 ZrF 6 、K 2 TiF 6 and Na 2 B 4 o 7 Powder (its addition is respectively: 4174g, 5714g, 7415g, the ZrB of generation 2 , TiB 2 and Al 2 o 3 The mass ratio between the particles is 1:1:2), and at the same time turn on the acoustic-magnetic coupling field (magnetic field: frequency 10Hz, magnetic current 100A; ultrasonic: power 1000W, frequency 20kHz) to react for 30min, and remove the scum on the surface of the melt after the reaction , when the temperature drops to 750°C and keep warm.

[0030] Adjustment of components and addition of compound modification and refiner: add 0.4wt.% pure Mg and 0.35wt.% Al-20% Si master alloy into the melt, and at the same time use graphite stirring rotor to rotate to promote Mix and keep warm for 10min, then a...

Embodiment 2

[0036] Preparation of in-situ nanoparticle-reinforced composite materials: Melt 100Kg of commercial A356.2 alloy raw material at 750°C and keep it warm for 10min. When the temperature continues to rise to 850°C, add in batches K 2 ZrF 6 、K 2 TiF 6 and Na 2 B 4 o 7 Powder (its addition is respectively: 3542g, 5134g, 6844g, the ZrB of generation 2 , TiB 2 and Al 2 o 3 The mass ratio between the particles is 1:2:2, and the acoustic-magnetic coupling field (magnetic field: frequency 10Hz, magnetic current 100A; ultrasonic: power 1000W, frequency 20kHz) is turned on for 30 minutes, and the scum on the surface of the melt is removed after the reaction is completed. Keep the temperature down to 750°C.

[0037] Adjustment of components and addition of compound modification and refiner: add 0.4wt.% pure Mg and 0.35wt.% Al-20% Si master alloy into the melt, and at the same time use graphite stirring rotor to rotate to promote Mix and keep warm for 10min, then add 0.2wt.% Al-10...

Embodiment 3

[0043] Preparation of in-situ nanoparticle-reinforced composite materials: Melt 100Kg of commercial A356.2 alloy raw material at 750°C and keep it warm for 10min. When the temperature continues to rise to 850°C, add in batches K 2 ZrF 6 、K 2 TiF 6 and Na 2 B 4 o 7 Powder (its addition amount is respectively: 4174g, 5714g, 8786g, the ZrB of generation 2 , TiB 2 and Al 2 o 3 The mass ratio between the particles is 1:1:3), and at the same time turn on the acoustic-magnetic coupling field (magnetic field: frequency 10Hz, magnetic current 100A; ultrasonic: power 1000W, frequency 20kHz) to react for 30min, and remove the scum on the surface of the melt after the reaction , when the temperature drops to 750°C and keep warm.

[0044] Adjustment of components and addition of compound modification and refiner: add 0.4wt.% pure Mg and 0.35wt.% Al-20% Si master alloy into the melt, and at the same time use graphite stirring rotor to rotate to promote Mix and keep warm for 10min,...

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Abstract

The invention relates to an in-situ nanometer intensified aluminum alloy wheel hub with light weight, high strength and fatigue resistance for a new energy automobile and a manufacturing method thereof. Through in-situ chemical reaction of a melted body, nanometer particle compound reinforcement is realized by Orowan reinforcement + refined crystalline reinforcement, long-term compound metamorphism and complex refinement are integrated, and the refined crystalline reinforcement is achieved. The purification technology of nitrogen and argon combined rotary air refining + aluminum-rear earth isadopted, multi-stage deep purification of aluminum melted body is realized, the characteristic that argon is greater than air in density is used for forming a protective layer on the surface of the melted body, and alloy is introduced between the aluminum-rear earth to produce intermediate compounds with the density greater than that of the particles, and therefore the deep high-efficiency purification is effectively achieved. A novel low pressure shaping technology of progressive solidification + rapid crystallization is adopted in the end, due to the fact that crystallization time is shortened, the space between secondary branch crystal arms in a casting microstructure is shortened, the structure is refined and the feeding effect is enhanced, the casting is denser in structure, and the wheel hub with high plasticity, high anti-fatigue performance and high density is obtained.

Description

technical field [0001] The invention relates to a light-weight, high-strength, anti-fatigue, in-situ nano-reinforced aluminum alloy wheel hub for new energy vehicles and a manufacturing method, belonging to the technical field of new energy vehicle wheel hub preparation. Background technique [0002] Currently, new energy vehicles represented by pure electric vehicles, hybrid vehicles, and fuel cell vehicles are growing rapidly around the world. However, due to factors such as battery weight and cruising range, new energy vehicles have more urgent requirements for lightweight. Studies have shown that new energy vehicles use lightweight high-strength aluminum alloy wheels instead of traditional aluminum wheels, which can reduce vehicle energy consumption by up to 3%. At the same time, since new energy vehicles are generally heavier than traditional vehicles of the same level, the loads on the wheels are greater, and the requirements for strength and fatigue resistance are hi...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/03C22C1/06C22C21/00C22C32/00C22F1/04B22D18/04
CPCC22C1/06C22C1/1036C22C21/00C22C32/0005C22F1/04B22D18/04B22D21/04B22D21/007C22C21/04C22C1/026B60B27/00B60B2360/104B60B2360/36C22F1/05C22C1/03C22C1/1052
Inventor 赵玉涛陶然陈刚王坤李维玉
Owner JIANGSU UNIV
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