CN101417339A - Preparation method of ultra light porous metal fiber sandwich board - Google Patents
Preparation method of ultra light porous metal fiber sandwich board Download PDFInfo
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- CN101417339A CN101417339A CNA2008102325905A CN200810232590A CN101417339A CN 101417339 A CN101417339 A CN 101417339A CN A2008102325905 A CNA2008102325905 A CN A2008102325905A CN 200810232590 A CN200810232590 A CN 200810232590A CN 101417339 A CN101417339 A CN 101417339A
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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
The invention belongs to ultra-lightweight structural material and energy absorbing material preparing technical field, be specifically related to a kind of preparation method of ultra light porous metal fiber sandwich board.
Background technology
The porous metals sandwich structure also claims sandwich structure, is typical case's representative of ultra-lightweight structural material, and countries in the world are a lot of for the research of this material.For example the research of the foamed aluminium sandwich structure in the ultra light porous metal battenboard has had a large amount of bibliographical informations, and being used for bullet train and spacecraft, this mainly gives the credit to its superior performance: high specific strength, high specific stiffness, in light weight, absorbing sound and lowering noise, antidetonation, heat insulation etc.The sintered metal fiber porous material has characteristics such as high porosity, aperture be tiny, in light weight, can be used as the core material of sandwich structure.
Adopt the porous metal fiber sandwich material on the automobile, not only can reduce demand significantly, reduce environmental pollution the energy.Can also make automobile have outstanding damping property, sound insulation value and shockproof properties.
At present, for the porous metal fiber sandwich material document announcement is arranged abroad, its preparation method is that diameter is cut into the length of 1mm less than the stainless steel fibre of 20 μ m, and stainless steel fibre sticks on the stainless steel faceplate that scribbles epoxy resin in advance after the arranged vertical under electrostatic interaction.The bond strength of porous metal fiber core body and panel is low in the porous metal fiber sandwich material of this technology preparation, and complicated process of preparation, performance difficulty.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of preparation method of ultra light porous metal fiber sandwich board is provided.Adopt the ultralight metallic fiber battenboard of this method preparation, form, have in light weight, higher specific strength, specific stiffness and anti-mechanical shock and EAC by upper and lower two fine and close panels and porous metal fiber sandwich body three parts.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of preparation method of ultra light porous metal fiber sandwich board is characterized in that preparation process is:
(1) the coarse sensitization of metal decking is handled: the metal decking after the cutting is cleaned with washing agent with the one side that the porous metal fiber core body combines, the oven dry back is removed the oxide layer on metal decking surface with sand paper, steel brush or acid washing method, with cutter or steel brush the metal decking surface is delineated again, make metal decking form rugged rough surface;
(2) apply on the metal decking of in step (1), handling well one deck and described metal decking with the metal dust organic suspension liquid of material as the sintering active layer, the porous metal fiber core body is clipped in the middle of the metal decking of two good described sintering active layers of coating, guarantee that two metal deckings are parallel, the oven dry back forms the porous metal fiber sandwich board base substrate in baking oven;
(3) pressure sintering:, exert pressure in the sintering process metallic fiber battenboard base substrate with the sintering in vacuum sintering furnace or hydrogen sintering furnace of the porous metal fiber sandwich board base substrate in the step (2); Detailed process is: the porous metal fiber sandwich board base substrate is placed in the middle of two heat-resisting rigid plate, places on the heat-resisting rigid plate in top and add ballast, adopt the limited block that is arranged on the described heat-resisting rigid plate to limit the thickness of battenboard simultaneously;
(4) sintering post processing: the porous metal fiber sandwich board after step (3) pressure sintering is smooth on hydraulic press.
The thickness of metal decking is 0.1mm～5mm described in the above-mentioned steps (1).
Metal dust organic suspension liquid described in the above-mentioned steps (2) is that mass percent concentration is powder of stainless steel polyvinyl alcohol suspension or the powder of stainless steel methylcellulose suspension of 5%-10%.
The porous metal fiber core body is the sintered metal fiber porous material described in the above-mentioned steps (2), or unsintered metal fiber polyporous material shaping blank.
The thickness of sintering active layer is no more than 1mm described in above-mentioned rapid (2).
Sintering condition is described in above-mentioned rapid (3): sintering temperature is 1200 ℃～1320 ℃, and temperature retention time is 1-3 hour, and vacuum is 10
-2More than the Pa.
Porous metal fiber sandwich board described in the above-mentioned steps (4) on hydraulic press smooth pressure less than 2Mpa.
The present invention compared with prior art has the following advantages: exert pressure to porous metal fiber sandwich board in the sintering process of the present invention, adopt limited block to limit the thickness of porous metal fiber sandwich board, that the ultra light porous metal fiber sandwich board of preparation has is in light weight, specific strength is high, shock-resistant, can sound-absorbing, noise reduction, antidetonation, good performance such as heat insulation.
Below by drawings and Examples, the present invention is described in further detail.
Description of drawings
Fig. 1 is the device structure schematic diagram of pressure sintering process using among the present invention.
Among the figure: the 1-limited block, 2-adds ballast, 3-heat-resisting steel sheet and plate, 4-metal decking, 5-porous metal fiber core body.
The specific embodiment
The preparation method of a kind of ultra light porous metal fiber sandwich board of the present invention, preparation process is:
(1) the coarse sensitization of metal decking is handled: to thickness is that the metal decking of 0.1mm～5mm is cut into suitable dimension, then the metal decking after the cutting is cleaned with washing agent with the one side that the porous metal fiber core body combines, the oven dry back is removed the oxide layer on metal decking surface with sand paper or acid washing method, again with cutter or steel brush etc. to delineating on the metal decking surface, make metal decking form rugged rough surface;
(2) apply on the metal decking of in step (1), handling well one deck and described metal decking with the metal dust organic suspension liquid of material as the sintering active layer, the porous metal fiber core body is clipped in the middle of the metal decking of two good described sintering active layers of coating, guarantee that two metal deckings are parallel, the oven dry back forms the porous metal fiber sandwich board base substrate in baking oven; Wherein, described metal dust organic suspension liquid is that mass percent concentration is powder of stainless steel polyvinyl alcohol suspension or the powder of stainless steel methylcellulose suspension of 5%-10%, and the thickness of described sintering active layer is no more than 1mm;
(3) pressure sintering:, exert pressure in the sintering process metallic fiber battenboard base substrate with the sintering in vacuum sintering furnace or hydrogen sintering furnace of the porous metal fiber sandwich board base substrate in the step (2); As shown in Figure 1, detailed process is: the porous metal fiber sandwich board base substrate is placed on two heat-resisting rigid plate such as heat-resisting steel sheet and plate 3 centres, placement adds ballast 2 on the top heat-resisting steel sheet and plate 3, adopts the limited block 1 that is arranged on the heat-resisting steel sheet and plate 3 to limit the thickness of battenboard simultaneously.
(4) sintering post processing: the porous metal fiber sandwich board after step (3) pressure sintering is smooth on hydraulic press, and pressure is less than 2Mpa.
Sintering condition is described in above-mentioned rapid (3): sintering temperature is 1200 ℃～1320 ℃, and temperature retention time is 1-3 hour, and vacuum is 10
-2More than the Pa.
Cutting be of a size of 150mm * 150mm thickness be the 316L corrosion resistant plate of 0.4mm as metal decking 4, in the metal liquid detergent aqueous solution, remove surface and oil contaminant, be that 80 purpose sand paper are removed surface oxide layer, and carry out thick good fortune processing with granularity.Coating one deck concentration is 5% superfine stainless steel powdered polyvinyl alcohol suspension on the panel of handling well.With the thickness that sinters is that 12mm, porosity are that 83.5% porous metal fiber core body 5 is clipped in the middle of two panels that applied the sintering active layer, guarantees that two panels are parallel.Sandwich battenboard to be sintered is dried in baking oven, promptly constitute metallic fiber sandwich structure base substrate.Base substrate is at sintering process: temperature is 1210 ℃, and temperature retention time is 2h, and vacuum remains on 1.5 * 10
-2More than the Pa.The sandwich sintered body is placed in the middle of the thick heat-resisting steel sheet and plate of two 8mm 3, and what 500g was placed on top adds ballast 2, and the height of limited block 1 is 11mm.Sandwich battenboard behind the sintering is smooth on 100 t hydraulic press, and pressure is less than 2MPa, and the thickness of assurance battenboard is 10mm.Such one is of a size of 150mm * 150mm * 10mm ultralight metallic fiber battenboard preparation and finishes.
The silk footpath that utilizes air-flow shop system is that to be prepared into thickness be that 70% porous fibrous material is as unsintered porous metal fiber core body for 5mm, design porosity to the 304 stainless steel fibre porous blank material of 8 μ m.Cutting thickness is 316 corrosion resistant plates of 1mm, brushes surface and oil contaminant, the hydrochloric acid solution with 3% except that surface oxide layer in the metal liquid detergent aqueous solution, and adopts knife the surface to be depicted the surface of slightly making.Coating one deck concentration is 10% superfine stainless steel powder methylcellulose suspension on the stainless steel metal panel of handling well 4.Above-mentioned porous metal fiber core body 5 is clipped in two stainless steel metal panels 4 centres that applied the sintering active layer, guarantees that two stainless steel metal panels 4 are parallel.Sandwich battenboard to be sintered is dried in baking oven, promptly constitute metallic fiber sandwich structure base substrate.Base substrate is at sintering process: temperature is 1280 ℃, and temperature retention time is 2h, and vacuum remains on 10
-2More than the Pa order of magnitude.The sandwich sintered body is placed in the middle of the thick heat-resisting steel sheet and plate of two 8mm 3, and what 1kg was placed on top adds ballast 2, and the height of limited block 1 is 6mm.Sandwich battenboard behind the sintering is smooth on 100 t hydraulic press, and pressure is less than 2MPa, and the thickness of assurance battenboard is not less than design thickness.Such ultralight metallic fiber battenboard preparation is finished.
Claims (7)
1. the preparation method of a ultra light porous metal fiber sandwich board is characterized in that preparation process is:
(1) the coarse sensitization of metal decking is handled: the metal decking after the cutting is cleaned with washing agent with the one side that the porous metal fiber core body combines, the oven dry back is removed the oxide layer on metal decking surface with sand paper, steel brush or acid washing method, with cutter or steel brush the metal decking surface is delineated again, make metal decking form rugged rough surface;
(2) apply on the metal decking of in step (1), handling well one deck and described metal decking with the metal dust organic suspension liquid of material as the sintering active layer, the porous metal fiber core body is clipped in the middle of the metal decking of two good described sintering active layers of coating, guarantee that two metal deckings are parallel, the oven dry back forms the porous metal fiber sandwich board base substrate in baking oven;
(3) pressure sintering:, exert pressure in the sintering process metallic fiber battenboard base substrate with the sintering in vacuum sintering furnace or hydrogen sintering furnace of the porous metal fiber sandwich board base substrate in the step (2); Detailed process is: the porous metal fiber sandwich board base substrate is placed in the middle of two heat-resisting rigid plate, places on the heat-resisting rigid plate in top and add ballast, adopt the limited block that is arranged on the described heat-resisting rigid plate to limit the thickness of battenboard simultaneously;
(4) sintering post processing: the porous metal fiber sandwich board after step (3) pressure sintering is smooth on hydraulic press.
2. the preparation method of a kind of ultra light porous metal fiber sandwich board according to claim 1, the thickness that it is characterized in that metal decking described in the step (1) is 0.1mm～5mm.
3. the preparation method of a kind of ultra light porous metal fiber sandwich board according to claim 1 is characterized in that metal dust organic suspension liquid described in the step (2) is that mass percent concentration is powder of stainless steel polyvinyl alcohol suspension or the powder of stainless steel methylcellulose suspension of 5%-10%.
4. the preparation method of a kind of ultra light porous metal fiber sandwich board according to claim 1, it is characterized in that the porous metal fiber core body is the sintered metal fiber porous material described in the step (2), or unsintered metal fiber polyporous material shaping blank.
5. the preparation method of a kind of ultra light porous metal fiber sandwich board according to claim 1 is characterized in that the thickness of sintering active layer described in the step (2) is no more than 1mm.
6. the preparation method of a kind of ultra light porous metal fiber sandwich board according to claim 1, it is characterized in that sintering condition is described in the step (3): sintering temperature is 1200 ℃～1320 ℃, and temperature retention time is 1-3 hour, and vacuum is 10
-2More than the pa.
7. the preparation method of a kind of ultra light porous metal fiber sandwich board according to claim 1, it is characterized in that porous metal fiber sandwich board described in the step (4) on hydraulic press smooth pressure less than 2Mpa.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648271B (en) * | 2009-09-11 | 2011-04-06 | 西安菲尔特金属过滤材料有限公司 | Preparation method of iron chromium aluminum sintered fiber felt |
| CN102029396A (en) * | 2010-12-06 | 2011-04-27 | 西北有色金属研究院 | Method for preparing integral type seamless metal fiber perforated pipe and tangling device |
| CN104289717A (en) * | 2014-11-06 | 2015-01-21 | 厦门大学 | Manufacturing method for hierarchical pore metal fiber sintered plate |
| CN105108149A (en) * | 2015-08-31 | 2015-12-02 | 西北有色金属研究院 | Sintering method for preventing metal fiber porous material crystal grains from growing abnormally |
| CN108472727A (en) * | 2015-11-17 | 2018-08-31 | 因帕瑟伯物体有限责任公司 | The device and method and its product of metal-base composites for producing increasing material manufacturing |
| CN112809008A (en) * | 2020-07-22 | 2021-05-18 | 张明明 | Heat conduction layer preparation process based on porous sintering of metal powder fiber |
-
2008
- 2008-12-05 CN CN2008102325905A patent/CN101417339B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648271B (en) * | 2009-09-11 | 2011-04-06 | 西安菲尔特金属过滤材料有限公司 | Preparation method of iron chromium aluminum sintered fiber felt |
| CN102029396A (en) * | 2010-12-06 | 2011-04-27 | 西北有色金属研究院 | Method for preparing integral type seamless metal fiber perforated pipe and tangling device |
| CN102029396B (en) * | 2010-12-06 | 2012-05-23 | 西北有色金属研究院 | Method for preparing integral type seamless metal fiber perforated pipe and tangling device |
| CN104289717A (en) * | 2014-11-06 | 2015-01-21 | 厦门大学 | Manufacturing method for hierarchical pore metal fiber sintered plate |
| CN104289717B (en) * | 2014-11-06 | 2017-02-01 | 厦门大学 | Manufacturing method for hierarchical pore metal fiber sintered plate |
| CN105108149A (en) * | 2015-08-31 | 2015-12-02 | 西北有色金属研究院 | Sintering method for preventing metal fiber porous material crystal grains from growing abnormally |
| CN108472727A (en) * | 2015-11-17 | 2018-08-31 | 因帕瑟伯物体有限责任公司 | The device and method and its product of metal-base composites for producing increasing material manufacturing |
| CN112809008A (en) * | 2020-07-22 | 2021-05-18 | 张明明 | Heat conduction layer preparation process based on porous sintering of metal powder fiber |
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| CN101417339B (en) | 2010-09-08 |
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