Method for preparing silicon carbide aluminum-based composite structural member and silicon carbide reinforced preform

A silicon carbide aluminum-based, composite structure technology, applied in the field of composite materials, can solve the problems of difficult removal process, waste gas environmental pollution, long degreasing time, etc., and achieve the effects of avoiding pollution of the environment, uniform density, and cheap molds

Inactive Publication Date: 2019-02-05
ANHUI TATFOOK TECH CO LTD
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  • Abstract
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Problems solved by technology

[0004] However, the inventors of the present application found in the long-term research and development process that in the above method, when preparing complex parts by powder injection molding, the injection powder is required to have good fluidity, and a large amount of organic binder needs to be added. The process is the most difficult link in the whole process. The degreasing time is long, and a large amount of waste gas generated during degreasing will pollute the environment. At the same time, the powder particle size is generally 0.5-20um to meet the requirements of the powder injection molding process.

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  • Method for preparing silicon carbide aluminum-based composite structural member and silicon carbide reinforced preform
  • Method for preparing silicon carbide aluminum-based composite structural member and silicon carbide reinforced preform
  • Method for preparing silicon carbide aluminum-based composite structural member and silicon carbide reinforced preform

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preparation example Construction

[0024] see figure 1 , figure 1 It is a flow chart of an embodiment of a method for preparing a silicon carbide-aluminum matrix composite structural member of the present application, and the method includes:

[0025] Step S101: providing at least two kinds of silicon carbide particles with different average particle sizes.

[0026]Silicon carbide particles of different particle sizes have different geometric shapes. Usually, the geometric shape of silicon carbide particles is irregular and polyhedral, and some particles have sharp corners. Using an average particle size of SiC particles to prepare SiC preforms may easily cause incomplete filling between the particles, resulting in insufficient strength of the preform, and finally the strength of the AlSiC composite material is not enough to be used as a body structure. In this embodiment, more than two kinds of silicon carbide particles with different average particle sizes are selected, so that SiC particles of different si...

Embodiment 1

[0068] This embodiment is illustrated by taking the preparation of the B-pillar of a car body from an AlSiC composite structure as an example.

[0069] The cross-sectional shape of the traditional B-pillar is relatively complex. It is welded by multiple stamped steel plates. Except for the interior and exterior cladding parts, the B-pillar is generally divided into inner panels, reinforcement panels, and outer panels from the inside to the outside. It is basically a closed thin-walled beam structure. The upper and lower joints connect the B-pillar with the roof side beam and the door frame by welding. To ensure that the B-pillar has sufficient strength, it is even necessary to build a structural model of "outer panel-reinforcement panel-local reinforcement panel-inner panel", and the reinforcement panel structure is usually a small assembly, through the installation of safety belts and doors on the B-pillar The location of locks and other accessories requires high rigidity, an...

Embodiment 2

[0078] This embodiment is illustrated by taking AlSiC composite structural parts as an example to prepare the front longitudinal beam of a car body.

[0079] In automobile structure, thin-walled components stamped from low-carbon steel plates are widely used, and can be welded together with other components through flanging. The cross-section of the traditional car front longitudinal beam is a thin-walled rectangular structure. When a car has a frontal collision, the kinetic energy of the collision is mainly absorbed by the plastic deformation of the front part of the car body, and the front longitudinal beam plays a major role.

[0080] Compared with the low-carbon steel material of the traditional automobile front longitudinal beam, the aluminum-silicon carbide composite structure has higher yield strength and energy absorption capacity, and at the same time achieves the purpose of greatly reducing weight. Comprehensively considering the energy absorption capacity, collisio...

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Abstract

The present application discloses a method for preparing a silicon carbide aluminum-based composite structural member and a silicon carbide reinforced preform, the method comprising: providing at least two silicon carbide particles having different average particle sizes; uniformly mixing the silicon carbide particles having different average particle sizes in a predetermined ratio; adding a binder containing an inert material to the uniformly mixed silicon carbide particles for kneading and granulating, and performing cold isostatic pressing technology to form a silicon carbide reinforced preform; and making the aluminum-containing melt liquid and the silicon carbide reinforced preform into the silicon carbide aluminum-based composite structural member by using avacuum liquid phase infiltration method. In this way, the method is capable of producing complex parts or providing technical support for the complex parts, and the plasticity requirements for the powder are not high.

Description

technical field [0001] The present application relates to the technical field of composite materials, and in particular to a method for preparing a silicon carbide-aluminum matrix composite structural part and a silicon carbide reinforced prefabricated part. Background technique [0002] High-performance lightweight structural materials occupy an important strategic position in economic and national defense construction. Among them, the lightweight structural materials used as the matrix mainly include three alloys of A1, Mg, and Ti, and the reinforcement materials mainly include silicon carbide SiC, A1 2 o 3 、BC 4 、TiB 2 Wait. At present, silicon carbide AlSiC composite materials are widely used in aerospace, electronic packaging, optical instruments, sports equipment and other fields due to their excellent thermophysical and mechanical properties. [0003] In a prior art, the preparation method of AlSiC composite material is: adopt SiC powder and paraffin-based binder ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/577C04B35/622C04B38/00C04B41/88
Inventor 曾俊庄后荣袁亮亮
Owner ANHUI TATFOOK TECH CO LTD
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