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Close-pore foamed metal element with hollow ceramic and method for preparing the same

A technology of closed-cell foam and metal foam, which is applied to heat exchange equipment, rotors, cylinders, etc., can solve problems such as complex processes, and achieve the effects of simplified processes, uniform microstructure, and good reproducibility

Inactive Publication Date: 2006-10-11
HEFEI UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0008] The present invention aims at the defects that the infiltration method and the powder metallurgy method are complicated in technology, and hollow metal balls, glass beads, and floating beads are used to make holes in the ball material method. The hollow ceramic balls are used to make holes and the corresponding casting method aims to provide a relatively Simple method, but can prepare closed-cell metal foam components with uniform microstructure and overall shape control, and can be directly used without or with little post-processing

Method used

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  • Close-pore foamed metal element with hollow ceramic and method for preparing the same

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Embodiment Construction

[0018] 1. Make a mold according to the shape required for the purpose of the aluminum foam. Metal aluminum is melted to obtain aluminum liquid (the melting point of metal aluminum is 660° C.). Preheat the hollow diatomaceous earth ceramic ball to about 655°C. Add 75vt% hollow diatomite ceramic balls to the molten aluminum under stirring, continue to stir and slowly cool down to about 650°C, pour the mixed aluminum liquid into a mold, and obtain hollow diatomite ceramic balls after cooling and molding Closed-cell aluminum foam.

[0019] 2. Make molds. Melting iron (steel) yields liquid iron (steel). Preheat the hollow alumina ceramic balls to near the melting point of iron (steel), add 35vt% hollow alumina ceramic balls under stirring, then add 0.3wt% metal calcium or magnesium, stir evenly, and mix the iron (steel) The liquid is poured into the mold, and after cooling and forming, a hollow alumina ceramic ball closed-cell foam iron (steel) piece is obtained.

[0020] 3. M...

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Abstract

The invention relates to a hollow ceramic ball sealed foam metallic element which is produced by uniformly dispersing hollow ceramic balls in fused metallic liquid and molding liquid in mould. Said invention comprises hollow ceramic balls (1) and metallic base (2). First adding preheated hollow ceramic balls into fused metallic liquid; uniformly distributing said balls via mixing decreasing temperature or / and adding thickener; pouring it into mould to be cooled and shaped. The invention has simple process, while the final foam metallic element has controllable micro structure and complex shape. And it can be directly used with few following process.

Description

1. Technical field [0001] The invention relates to a metal component and a preparation method thereof, in particular to a foam metal component and a preparation method thereof, specifically a hollow ceramic ball closed-cell foam metal part and a preparation method thereof. 2. Background technology [0002] Foamed aluminum is the most researched among foamed metals, especially there are many studies on the preparation of foamed aluminum by foaming method. Its biggest advantage is that the cost is relatively low and it can be produced on a large scale; however, it has the disadvantages of uneven pore structure and difficult process control. Obtaining large-sized metal foam limits its application; in addition, the metal foam material obtained by this method is difficult to obtain products with complex shapes because of the difficulty in conventional follow-up machining, which also limits its application in automobiles, aerospace It is widely used in many industries such as mili...

Claims

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Application Information

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IPC IPC(8): B22D19/00
Inventor 张学斌
Owner HEFEI UNIV OF TECH
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