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
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[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...
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[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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