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A kind of preparation method of low-density metal matrix composite material

A technology of composite materials and non-metallic materials, which is applied in the field of die-casting of lightweight aluminum-based composite materials to achieve the effects of increased hardness, high porosity, and reduced density

Active Publication Date: 2019-11-29
ZHUHAI RUNXINGTAI ELECTRICAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems described above, and provides a die-casting method for lightweight and low-density metal matrix composites

Method used

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  • A kind of preparation method of low-density metal matrix composite material
  • A kind of preparation method of low-density metal matrix composite material
  • A kind of preparation method of low-density metal matrix composite material

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Embodiment Construction

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than Full examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0027] The preparation method of the low-density metal matrix composite provided by the present invention and the prepared low-density metal matrix composite will be explained in detail below by means of specific examples.

[0028] 1S prepar...

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Abstract

Provided is a preparation method for a low density metal matrix composite: (1) preparing a metal or alloy having a density of 1.8-8.9 g / m3, and heating until molten to obtain a liquid metal; (2) preparing a non-metallic material having a density of 0.3-1.2 g / m3, and crushing the non-metallic material into non-metallic granules having a granularity of 500-800 mesh; (3) dispersing the non-metallic granules in step (2) in the liquid metal obtained in step (1) to form a mixed melt; (4) mechanically stirring the mixed melt obtained in step (3) with a stirring rod while adding argon to the mixed melt, the stirring speed of the stirring rod being set at 1200-2200 r / min, the stirring time being set at 10-180 seconds, to obtain a semi-solid metal matrix composite slurry, the flow of the compressed gas being set at 8-25 l / min; (5) die-casting the semi-solid metal matrix composite slurry obtained in step (4) to obtain a low density metal matrix composite.

Description

technical field [0001] The invention relates to the technical field of die-casting of composite materials, in particular to a die-casting method of lightweight aluminum-based composite materials. Background technique [0002] Die-casting is a special casting process. It is a process in which light alloys such as aluminum and magnesium are filled in liquid form into the cavity of a metal die-casting mold at high speed by a die-casting machine to produce metal die-casting structural parts. Die castings have the characteristics of high strength and less processing, and the density of aluminum alloy is 2.7g / cm 3 , is a non-ferrous light metal alloy. Semi-solid metal casting technology is a metal forming technology between solid-state forming and liquid-state forming. The ratio is 20-60%, and the semi-solid structure is a round spherical crystal. This structure is fine and dense, and the product has better compactness. [0003] At present, lightweight metal materials such as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C1/02B22D17/00
CPCB22D17/00C22C1/02C22C1/10
Inventor 张莹王继成李谷南彭玉云宁昌州任怀德
Owner ZHUHAI RUNXINGTAI ELECTRICAL
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