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Preparation method of ultra light porous metal fiber sandwich board

A porous metal and sandwich panel technology, which is applied in the field of preparation of ultra-light porous metal fiber sandwich panels, can solve the problems of difficult implementation, complex preparation process, low bonding strength of porous metal fiber core and panel, and achieve light weight , the effect of high specific strength

Active Publication Date: 2009-04-29
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the porous metal fiber sandwich material prepared by this process, the bonding strength between the porous metal fiber core and the panel is low, and the preparation process is complicated and difficult to implement.

Method used

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  • Preparation method of ultra light porous metal fiber sandwich board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A 316L stainless steel plate with a size of 150mm×150mm and a thickness of 0.4mm was cut as the metal panel 4, and the surface oil was removed in an aqueous solution of metal detergent, and the surface oxide layer was removed with sandpaper with a particle size of 80 mesh, and roughened. Coat a layer of ultrafine stainless steel powder polyvinyl alcohol suspension with a concentration of 5% on the treated panel. The sintered porous metal fiber core body 5 with a thickness of 12 mm and a porosity of 83.5% is sandwiched between two panels coated with a sintered activation layer to ensure that the two panels are parallel. The sandwich sandwich panel to be sintered is dried in an oven to form a metal fiber sandwich structure green body. The green body is in the sintering process: the temperature is 1210°C, the holding time is 2h, and the vacuum degree is kept at 1.5×10 -2 Above Pa. The sandwich sintered green body is placed between two 8mm thick heat-resistant steel plate...

Embodiment 2

[0030] A porous fiber material with a thickness of 5 mm and a design porosity of 70% was prepared by air-laid 304 stainless steel fiber porous blank with a wire diameter of 8 μm as an unsintered porous metal fiber core. Cut the 316 stainless steel plate with a thickness of 1mm, brush the surface oil in the metal detergent solution, remove the surface oxide layer with 3% hydrochloric acid solution, and use a knife to carve the surface to create a rough surface. On the treated stainless steel metal panel 4, a layer of ultrafine stainless steel powder methylcellulose suspension with a concentration of 10% is coated. The above-mentioned porous metal fiber core body 5 is sandwiched between two stainless steel metal panels 4 coated with a sintered activation layer to ensure that the two stainless steel metal panels 4 are parallel. The sandwich sandwich panel to be sintered is dried in an oven to form a metal fiber sandwich structure green body. The green body is in the sintering pr...

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Abstract

The invention provides a preparation method of an ultralight porous metal fiber laminboard, comprising the following steps: (1) a metal panel is treated with rough sensitization; (2) a sintering activation layer is coated on the treated metal panel, a porous metal fiber core is clamped between two metal panels coated with the sintering activation layers, and dried in an oven to form porous metal fiber laminboard blank; and (3) the porous metal fiber laminboard blank is sintered at increased pressure in a vacuum sintering furnace or a hydrogen sintering furnace, and the sintered porous metal fiber laminboard at increased pressure is smoothed on a hydraulic press. In the sintering process, pressure is exerted on the porous metal fiber laminboard, the final thickness of the porous metal fiber laminboard is determined by adopting a limiting block, and the prepared ultralight porous metal fiber laminboard has light weight, high specific strength and impact resistance, as well as the excellent performances of sound-absorbing, noise reduction, earthquake proof, thermal insulation, and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of ultra-light structural materials and energy-absorbing materials, and in particular relates to a preparation method of an ultra-light porous metal fiber sandwich panel. Background technique [0002] Porous metal sandwich structure, also known as sandwich structure, is a typical representative of ultra-light structural materials. There are many researches on this material in various countries around the world. For example, the research on the aluminum foam sandwich structure in ultra-light porous metal sandwich panels has been reported in a large number of literatures, and has been used in high-speed trains and spacecraft, mainly due to its superior performance: high specific strength, high specific stiffness , light weight, sound absorption and noise reduction, shock resistance, heat insulation, etc. Sintered metal fiber porous material has the characteristics of high porosity, small pore s...

Claims

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Application Information

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IPC IPC(8): B22F7/04
Inventor 汤慧萍王建永奚正平朱纪磊敖庆波葛渊李程臧纯勇乔吉超
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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