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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  • 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

Method used

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  • Preparation method of ultra light porous metal fiber sandwich board

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Example Embodiment

[0027] Example 1

[0028] A 316L stainless steel plate with a cut size of 150mm×150mm and a thickness of 0.4mm is used as the metal panel 4. The surface oil is removed in a metal detergent aqueous solution, the surface oxide layer is removed with 80 mesh sandpaper, and the roughening treatment is performed. Coat a layer of superfine stainless steel powder polyvinyl alcohol suspension with a concentration of 5% on the processed panel. The sintered porous metal fiber core 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 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℃, the holding time is 2h, and the vacuum degree is maintained at 1.5×10 -2 Pa or more. Place the sandwich sintered body in the middle of two 8mm thick heat-resistant steel plat...

Example Embodiment

[0029] Example 2

[0030] The air-laid porous 304 stainless steel fiber blank with a wire diameter of 8 μm is prepared into a porous fiber material with a thickness of 5 mm and a design porosity of 70% as an unsintered porous metal fiber core. Cut a 316 stainless steel plate with a thickness of 1mm, brush off the surface greasy dirt in a metal detergent aqueous solution, remove the surface oxide layer with a 3% hydrochloric acid solution, and use a knife to draw a rough surface on the surface. A layer of ultrafine stainless steel powder methylcellulose suspension with a concentration of 10% is coated on the processed stainless steel metal panel 4. The 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 panel to be sintered is dried in an oven to form a metal fiber sandwich structure green body. The green body is in the sinteri...

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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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