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Automobile collision energy-absorbing composite material and preparation method thereof

A technology of composite materials and collision energy absorption, applied in chemical instruments and methods, layered products, metal layered products, etc., can solve the problems that the energy absorption effect cannot be fully reflected, and the collision energy absorption material fails, etc., to achieve high specific absorption energy, high work hardening rate, cost saving effect

Pending Publication Date: 2021-01-12
CISDI ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an automobile crash energy-absorbing composite material and a preparation method thereof, which are used to solve the problem that the crash energy-absorbing material in the prior art will quickly fail and absorb energy under severe impact. The effect cannot be fully reflected, etc.

Method used

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  • Automobile collision energy-absorbing composite material and preparation method thereof
  • Automobile collision energy-absorbing composite material and preparation method thereof

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preparation example Construction

[0035] Specifically, the thickness of the dual-phase steel plate is 0.1-100mm, and the thickness of the particle-reinforced aluminum foam core material is 0.1-500mm. The thickness of dual-phase steel plate and aluminum foam core material can be selected according to actual needs. The preparation method of the automobile collision energy-absorbing composite material of the present invention comprises the following steps:

[0036] (1) Pretreatment of dual-phase steel plate:

[0037] Pre-rolling the dual-phase steel plate located on the outermost layer, the reduction amount is 0.01%-95%. Specifically, the pre-rolling process is selected from any one or more of rolling, cold treatment and heat treatment.

Embodiment 1

[0048] The preparation method of automobile collision energy-absorbing composite material in this embodiment comprises the following steps:

[0049] (1) Pretreatment of dual-phase steel plate

[0050] The thickness of the outermost dual-phase steel plate 1 is 12 mm, the thickness of the inner dual-phase steel plate 2 is 6 mm, and the thickness of the particle-reinforced foamed aluminum core material 3 is 20 mm.

[0051] Cold-rolling the outermost dual-phase steel plate 1 with a drawdown of 10%, after cooling, flame cutting with the inner dual-phase steel plate 2 to adjust the size to be consistent;

[0052] The inner dual-phase steel plate 2 is subjected to solution treatment in a heating furnace with a solution temperature of 1150° C. and a holding time of 20 minutes. After holding the heat, it is taken out and quenched.

[0053] (2) Surface treatment of duplex steel plate

[0054] Washing and drying the pretreated outermost dual-phase steel plate 1 and inner dual-phase ste...

Embodiment 2

[0061] The preparation method of the automobile collision energy-absorbing composite material in this embodiment The preparation method comprises the following steps:

[0062] (1) Pretreatment of dual-phase steel plate

[0063] The thickness of the outermost dual-phase steel plate 1 is 10 mm, the thickness of the inner dual-phase steel plate 2 is 8 mm, and the thickness of the particle-reinforced foamed aluminum core material 3 is 20 mm.

[0064] Cold rolling is performed on the outermost dual-phase steel plate 1, with a downforce of 50%, and after cooling, it is flame-cut together with the inner dual-phase steel plate 2 to adjust the size to be consistent;

[0065] The inner dual-phase steel plate 2 is subjected to solution treatment in a heating furnace, the solution temperature is 1050° C., and the holding time is 30 minutes. After holding the heat, it is taken out and quenched.

[0066] (2) Surface treatment of duplex steel plate

[0067] Washing and drying the pretreate...

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Abstract

The invention belongs to the technical field of automobile safety protection, and particularly discloses an automobile collision energy absorption composite material and a preparation method thereof.The composite material comprises M layers of particle reinforced foamed aluminum core materials and M+1 layers of dual-phase steel plates, the foamed aluminum core materials and the dual-phase steel plates are sequentially and alternately stacked, and the dual-phase steel plates are composed of austenite phases and martensite phases. According to the automobile collision energy-absorbing material,martensite is induced to form through dual-phase steel deformation at the moment of collision, so that a large amount of energy is absorbed at the moment of collision, the structure is kept stable, then residual energy is absorbed through porous fluffy foamed aluminum, and the defects that a traditional collision energy-absorbing structure is prone to losing efficacy at the moment of collision, and the energy absorption effect cannot be completely reflected are overcome. Besides, the dual-phase steel has higher strength and work hardening rate than aluminum alloy and other light metals, so that higher specific energy absorption can be realized under the condition of not sacrificing the strength and light weight, the same safety goal is achieved, and meanwhile, more cost is saved.

Description

technical field [0001] The invention relates to the technical field of automobile passive safety protection, in particular to an automobile collision energy-absorbing composite material and a preparation method thereof. Background technique [0002] When a traffic accident occurs, the anti-collision performance of the car is directly related to the safety of passengers. At present, the anti-collision safety design of automobiles is mainly a combination of active safety protection and passive safety protection. The passive safety protection mainly relies on the bumper system installed at the front and rear of the car to ensure that the car frame will not be severely damaged in a collision. In the low-speed collision scenario, in order to absorb the huge instantaneous energy generated by the collision of the car, an energy-absorbing box is often installed behind the bumper to achieve the purpose of the collision. There are also energy-absorbing materials filled inside the bum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B15/18B32B15/20B22F7/00
CPCB32B5/18B32B15/046B32B15/18B22F7/006B32B2266/045
Inventor 张芝民冯科朱科徐诗鑫白书霞
Owner CISDI ENG CO LTD
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