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High damping metal porous material and preparation method thereof

A metal porous, high damping technology, applied in the field of metal porous materials and their preparation, achieves the effects of convenient operation, simple process and improved damping performance

Inactive Publication Date: 2011-08-24
NO 52 INST OF CHINA NORTH IND GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The method adopted in the present invention to prepare Al-Mg high damping metal porous material by using the principles of reaction self-melting and thermal deformation has not been reported in relevant literature

Method used

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  • High damping metal porous material and preparation method thereof
  • High damping metal porous material and preparation method thereof
  • High damping metal porous material and preparation method thereof

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preparation example Construction

[0023] The preparation method of the present invention adopts the principle of low-temperature reaction self-melting and thermal deformation aging treatment, and the preparation steps include material body pretreatment; mixing ingredients; pressing molding; sintering; thermal deformation aging treatment and the like. Among them, the sintering equipment is called in-situ sintering equipment, which is designed and refitted by the applicant according to the PSP plasma sintering equipment. The sintering of process (4) and the thermal deformation aging treatment of process (5) can be carried out continuously in the above-mentioned same equipment; or the thermal deformation aging treatment of process (5) can also be completed in other equipment.

[0024] figure 1 It is the microstructure of a porous material with a pore edge strengthening phase after the sintering process, without thermal deformation aging treatment at this time. figure 2 It is the microstructure of porous materia...

Embodiment 1

[0025] Embodiment 1: Al-Mg porous material, the composition is 75Al-25Mg. The specific operation steps are as follows: dry the Al powder at 150°C×2h, and dry the Mg powder at 110°C×1h; weigh 75g of Al powder and 25g of Mg powder, mix them in a mixer for 60 minutes, cool Press (400Mpa) to make a Φ30mm billet; sinter in the in-situ sintering equipment, and keep it at 500°C for 15 minutes; the sintered product is squeezed and deformed after holding at 460°C for 10 minutes, and the deformation is 25%. The porosity of the prepared porous material is 12.5%, the bending strength is 180Mpa, and the internal friction value is Q -1 9.2×10 -3 .

Embodiment 2

[0026] Embodiment 2: Al-Mg porous material, the composition is 60Al-40Mg. The specific operation steps are as follows: dry the Al powder at 200°C×1h, and dry the Mg powder at 100°C×2h; weigh 60g of Al powder and 40g of Mg powder, mix them in a mixer for 40 minutes, cool Press (300Mpa) to make a Φ30mm billet; sinter in the in-situ sintering equipment, hold at 460°C for 10 minutes; squeeze and deform the sintered product after holding at 450°C for 8 minutes, and the deformation is 40%. The porosity of the prepared porous material is 19%, the bending strength is 200Mpa, and the internal friction value is Q -1 2.13×10 -2 .

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Abstract

The invention discloses a high damping metal porous material and a preparation method thereof. The material comprises the following components in percentage by weight: 40 to 90 percent of Al powder, and the balance of Mg powder. The preparation method comprises the following steps of: (1) pretreating powder, namely drying the Al powder for 1 to 2h at the temperature of between 150 and 200 DEG C, and drying the Mg powder for 1 to 2h at the temperature of between 100 and 120 DEG C; (2) mixing, namely stirring and mixing the dried Al powder and the dried Mg powder in a mixer for 40 to 60min; (3) performing compression molding, namely performing compression molding on mixed materials in a molding press under the pressure of between 300 and 400Mpa; (4) sintering, namely sintering at the temperature of between 450 and 500 DEG C in in-situ sintering equipment, and keeping the temperature for 10 to 15min; and (5) performing thermal deformation aging treatment, namely heating at the temperature of between 430 and 460 DEG C, keeping the temperature for 5 to 10min, extruding and deforming, wherein the deformation amount is 10 to 90 percent. The material is a porous material with low density, high strength and high damping performance; and the preparation process is simple, the preparation method is convenient to operate, and production efficiency is high.

Description

technical field [0001] The invention relates to a metal porous material and a preparation method thereof, in particular to an Al-Mg high damping metal porous material and a preparation method thereof. Background technique [0002] Damping refers to the phenomenon that the material consumes mechanical vibration energy due to internal reasons during vibration. The damping performance is also called the vibration reduction performance. It is a functional characteristic of the material. The internal friction value Q is commonly used. -1 to represent. The damping performance of the material has the effect of reducing vibration, reducing noise and improving fatigue performance. Industries such as aviation, aerospace, atomic energy, petrochemical, metallurgy, machinery, medicine, and environmental protection have extensive demands for high-damping materials. [0003] The preparation methods of high-damping metal materials mainly include stirring casting method, spray co-depositio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06C22C23/02C22C1/08
Inventor 史洪刚祝理君柴东朗尚福军易更田开文黄伟
Owner NO 52 INST OF CHINA NORTH IND GRP CORP
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