Method for producing metal foam bodies

A metal foam and molten metal technology, applied in the field of metal foam manufacturing, can solve problems such as operator safety risks, and achieve the effects of high safety and low installation cost

Inactive Publication Date: 2006-02-22
阿卢莱特国际有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the use of hydrogen at high pressures and temperatures of at least several hundred degrees poses a significant safety risk to operators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] Ingots of alloy AZ91, which is a magnesium alloy with about 9% by weight of aluminum and about 1% by weight of zinc and the balance magnesium, were produced. Thereafter, the produced material is kept in the open air for several days to be subjected to moist air and rain.

[0027] After storage, the blocks were melted in a melting crucible at atmospheric pressure such that the atmosphere consisted of 1% by volume of SF 6 and 99% argon by volume. The molten metal was heated to 685 degrees Celsius; approximately 70 gms of the molten metal was then filled into a crucible preheated to 300 degrees Celsius. Subsequently, the filled crucible was fed into the low-pressure chamber, which was closed and a low pressure of 80 mbar was then immediately generated in the chamber. This low pressure was maintained for seven minutes, after which the chamber was vented and opened and the crucible was removed.

[0028] In the crucible, the porous metal foam with holes formed inside forms...

example 2

[0030] In another experiment, a procedure similar to that of Example 1 was carried out using a thermally insulated crucible. Metal foam bodies with substantially dense and crack-free surfaces can be obtained. The structure of the pores corresponds to that described in Example 1. Compared with the production of metal foam in a crucible that is not thermally insulated as described in Example 1, the density of the metal foam thus determined is significantly lower at about 0.75 gm / cm 3 .

example 3

[0032] The tests described in Examples 1 and 2 were repeated using commercial magnesium tape sections of type AZ91. A result similar to Example 1 or Example 2 can be obtained. Thus, by means of the method according to the invention it is likewise possible to convert recycled materials into high-value functional components in a simple manner.

[0033] In further tests with recycled materials, particularly favorable results were obtained with respect to bottom foam density and cell formation with scrap from the die-casting process of magnesium alloys as introduced material. Thereby, carry out the test similar to example 1 and example 2 in technology, can produce 3 and 0.65gm / cm 3 density of magnesium foam. This is due to the fact that during die casting, gases are introduced into the die cast metal and therefore parts of the die cast are always porous. Now, if waste from the die-casting process is used in the method according to the invention, the gas can pass not only throu...

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PUM

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Abstract

The invention relates to a method for producing a metal foam body, according to which a molten material containing gas is prepared and said molten material is left to solidify, thus forming a metal foam body. The aim of the invention is to produce high-quality metal foam bodies with a desired shape, without requiring complex equipment and whilst reducing the safety risk for the operating personnel. To achieve this, the material used is fused under atmospheric pressure and gas is simultaneously and/or subsequently introduced into the molten metal. The latter is then poured into a mould and is left to solidify, whereby the ambient pressure is reduced at least temporarily.

Description

technical field [0001] The present invention relates to a method for producing a metal foam body in which molten metal containing gas is produced and allowed to condense in a state where the metal foam body is formed. Background technique [0002] Porous bodies are known as metal foams, in which gas-filled pores are embedded in a fixed matrix, which is made of metal or has a predominant proportion by weight of metal. The insertion holes are generally spherical and / or elliptical and are separated from each other by walls of the matrix material. Depending on the production situation, the metal foam body can be substantially compact or non-porous in the region of the outer surface. In such cases, in the metal foam, the porous inner part is at least partially surrounded by a dense outer layer or skin. [0003] Due to the high porosity and low density that can be achieved technically, as well as favorable properties for many applications, such as good sound absorption, low ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08B22D21/00B22D25/00C22B9/05C22B26/22
CPCY10T428/1234B22D21/007C22C1/08C22B26/22C22B9/05B22F2999/00B22D25/005C22C2001/083Y02P10/20C22C1/083B22F3/1125B22F2201/20B22F8/00
Inventor 理查德·克雷茨卡林·伦格尔戈特弗里德·雷滕巴赫尔安东·欣特贝格尔
Owner 阿卢莱特国际有限公司
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