CN114888460B - Metal felt with ordered pore diameter structure and preparation method thereof - Google Patents
Metal felt with ordered pore diameter structure and preparation method thereof Download PDFInfo
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- CN114888460B CN114888460B CN202210576764.XA CN202210576764A CN114888460B CN 114888460 B CN114888460 B CN 114888460B CN 202210576764 A CN202210576764 A CN 202210576764A CN 114888460 B CN114888460 B CN 114888460B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2027—Metallic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
- B23K26/382—Removing material by boring or cutting by boring
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Chemical Kinetics & Catalysis (AREA)
- Powder Metallurgy (AREA)
- Filtering Materials (AREA)
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Abstract
A metal felt with an ordered pore diameter structure is formed by laminating at least 2 layers of metal sheets with staggered holes, wherein the diameter of each layer of the holes of the metal sheets is 5-5000 mu m; the thickness of the metal sheet is 0-0.2 mm. According to the method, the metal felt is prepared in a stacking mode after the thin plate is processed by laser, so that the metal felt can be prepared by partial materials difficult to prepare metal fibers; the staggered stacking of different metal sheets ensures that the holes at the staggered area are finer, thereby meeting the requirement of small aperture. The metal felt has high uniformity of pore sizes at different positions, so that the use efficiency can be increased.
Description
Technical Field
The invention belongs to the field of material processing, and particularly relates to a metal felt and a preparation method thereof, in particular to a metal felt with an ordered pore diameter structure and a preparation method thereof.
Background
The metal felt serving as the high-efficiency porous filtering material is widely applied to the industries of filtering, hydrogen production and catalysis, and is widely applied to pipelines and circuit systems of engines in the aviation and aerospace industries, and the metal felt plays a role in fastening and fixing the pipelines and the circuits.
The traditional metal felt is formed by non-woven laying, overlapping and vacuum sintering of metal fibers. For example, patent document CN2320408Y discloses a fiber metal felt which is formed by laminating a coarse fiber felt layer and a fine fiber nickel felt layer. Patent document CN103862741a discloses a metal felt and a manufacturing process thereof, the metal felt being provided with a plurality of metal wire transverse layers; a plurality of metal wire longitudinal layers are arranged between the metal wire transverse layers; the upper and lower outer surfaces of the metal felt can be provided with a protective coating. Patent document CN202965332U discloses a metal felt provided with a plurality of metal wire transverse layers, a plurality of metal wire longitudinal layers are arranged between the metal wire transverse layers, and the upper and lower outer surfaces of the metal felt can be provided with protective coatings; reinforcing plates can be arranged between the transverse layers of the metal wires.
However, the premise of the metal felt preparation in the above patent documents is that corresponding metal fibers are obtained, so that the metal felt preparation in part is difficult, and the manufacturing cost is high, such as titanium felt.
Disclosure of Invention
The invention aims to provide a metal felt with an ordered pore diameter structure and a preparation method thereof, change the processing mode of the original metal felt requiring metal fiber stacking, realize ordered holes of the metal felt, simplify the processing, prepare the metal felt with finer pore diameters, and match the requirements of different products on the pore diameters of the metal felt so as to solve the technical problems in the prior art.
The aim of the invention is achieved by the following technical scheme:
the invention relates to a metal felt with an ordered pore diameter structure, which is characterized in that the metal felt is formed by laminating at least 2 layers of metal sheets with staggered holes, wherein the diameter of each layer of holes of the metal sheets is 5-5000 mu m; the thickness of the metal sheet is 0-0.2 mm.
The invention also provides a preparation method of the metal felt with the ordered pore diameter structure, which is characterized by comprising the following steps:
(1) Cutting and punching the metal sheet by utilizing laser, and forming holes with the diameter of 5-5000 microns on the metal sheet; (2) Stacking a plurality of layers of metal sheets together in a hole dislocation mode; (3) Interlayer fixing is carried out on the laminated metal sheets to form a metal felt;
the interlayer fixing method is one or more of vacuum solid-phase sintering, spot welding, pulse welding and adhesive bonding, and preferably vacuum solid-phase sintering.
The metal sheet adopts laser cutting and punching, and adopts pulse laser to reduce laser to below 20 microns, thereby meeting certain service environments with higher requirements on material pores, such as: titanium felt for electrolytic tank, small-sized filtration, etc. When it is desired to produce a metal felt of large pore size, a laser can be used to travel a circular path over the sheet, resulting in a larger pore size. In addition, the pulse laser is adopted to process micropores, and because the energy of the laser is higher, the metal can be directly gasified, and the influence of accessories on the surface quality of the metal sheet can be reduced, so that the complexity of the subsequent process is reduced.
Preferably, the metal sheets between different layers are stacked in a hole dislocation mode, dislocation holes are guaranteed to be generated during stacking, as shown in fig. 3, the space utilization rate during stacking can be increased, the average pore diameter is effectively reduced, and the porosity of the metal felt is improved. The traditional mode of producing the metal felt by the metal fiber has the defect that the pore diameters at different positions are different and can influence the service performance of the metal felt, and the method can realize the consistency of the pore diameters of the metal felt at the heights of all positions and ensure the uniformity of the performance of the metal felt.
In summary, the invention has the following beneficial effects:
according to the method, the metal felt is prepared in a stacking mode after the thin plate is processed by laser, so that the original preparation mode of utilizing metal fibers is changed, the metal felt can be prepared by partial materials difficult to prepare the metal fibers, and the metal felt is more convenient and faster to produce; the pore and the diameter of the thin plate can be changed according to the laser impact or laser path cutting mode by adopting a laser drilling mode, so that the use requirements of different metal felts are met; the staggered stacking of different metal sheets ensures that the holes at the staggered area are finer, thereby meeting the requirement of small aperture. The metal felt has high uniformity of pore sizes at different positions, so that the use efficiency can be increased.
Drawings
FIG. 1 is a first sheet of perforated metal;
FIG. 2 is a staggered hole (relative to the first sheet metal) of a second sheet metal with holes;
FIG. 3 is a staggered stack of two perforated sheet metal holes;
wherein: 1-a laser hole; 2-dislocation holes; 3-stacking clearance holes.
Detailed Description
It will be appreciated by those skilled in the art that the present examples are provided for illustration only and are not intended to be limiting.
The raw materials involved in the examples of the present invention are all commercially available products.
Example 1 (using 0.05. 0.05 mm thick titanium plate)
(1) Selecting the minimum defocusing of a laser, and forming round holes on a first thin titanium plate, wherein the aperture is 20 mu m, and the hole spacing is 30 mu m; laser rounding holes are formed in the second thin titanium plate, the holes are staggered with the first thin titanium plate, and the aperture is 20 mu m and the hole spacing is 30 mu m; processing 3 rd to 8 th thin titanium plates in a layer-by-layer dislocation mode, and keeping the aperture of 20 mu m and the hole spacing of 30 mu m;
(2) Stacking 8 staggered punched thin titanium plates into 8 layers;
(4) Feeding the stacked thin titanium plates into a heat treatment furnace, and performing vacuum sintering at the temperature of 800 ℃; slowly cooling to room temperature to obtain a metal titanium felt with uniform aperture;
(5) The metal felt is cut into proper size according to the use requirement.
The metal titanium felt of the embodiment 1 has an ordered pore diameter structure, and really realizes ordered, controllable, convenient and suitable for various materials and various porosity requirements.
Example 2 (using 0.05. 0.05 mm thick titanium plate)
(1) Selecting the minimum defocusing of a laser, and forming round holes on a large thin titanium plate, wherein the aperture is 25 mu m, and the hole spacing is 30 mu m; cutting a large thin titanium plate into 8 pieces by adopting dislocation cutting;
(2) Stacking 8 thin titanium plates into 8 layers, and enabling dislocation to occur among holes during stacking;
(4) Feeding the stacked thin titanium plates into a heat treatment furnace, and performing vacuum sintering at the temperature of 800 ℃; slowly cooling to room temperature to obtain a metal titanium felt with uniform aperture;
(5) The metal felt is cut into proper size according to the use requirement.
The metal titanium felt in the embodiment 2 has an ordered pore diameter structure, so that the ordered, controllable, convenient and suitable for various materials and various porosity requirements are truly realized.
Example 3 (using 0.05 mm titanium plate)
(1) Selecting the minimum defocusing of a laser, and forming round holes on a first thin titanium plate, wherein the aperture is 20 mu m, and the hole spacing is 20 mu m, as shown in figure 1; performing laser rounding holes on the second thin titanium plate, wherein the holes are staggered with the first thin titanium plate, and the aperture is 30 mu m, and the hole spacing is 30 mu m, as shown in figure 2; and processing 3 to 8 pieces of thin titanium plates in a layer-by-layer dislocation mode, wherein the pore diameter is gradually increased to 90 mu m, and the pore spacing is gradually increased to 90 mu m.
(2) Stacking 8 staggered punched thin titanium plates, see fig. 3, and stacking all 8 layers;
(4) Feeding the stacked thin titanium plates into a heat treatment furnace, and performing vacuum sintering at the temperature of 800 ℃; slowly cooling to room temperature to obtain the metal titanium felt with variable aperture;
(5) The metal felt is cut into proper size according to the use requirement.
The metal titanium felt of the embodiment 3 has an ordered pore diameter structure, and really realizes ordered, controllable, convenient and suitable for various materials and various porosity requirements.
Example 4 (stainless steel plate 0.05 mm)
(1) Selecting the minimum defocusing of a laser, and punching square holes with the edge length of 5 mu m on a first thin titanium plate, wherein the hole spacing is 10 mu m; carrying out laser drilling on the second thin titanium plate, and carrying out staggered drilling on square holes with the edge length of 15 mu m and the first thin titanium plate, wherein the hole spacing is 20 mu m; processing 3 rd to 10 th thin titanium plates in a layer-by-layer dislocation mode, wherein the pore diameter is increased from 15 mu m to 50 mu m on average, and the pore spacing is increased from 20 mu m to 100 mu m on average;
(2) Stacking 10 staggered punched thin titanium plates into 10 layers;
(4) Feeding the stacked thin titanium plates into a heat treatment furnace, and performing vacuum sintering at the temperature of 800 ℃; slowly cooling to room temperature to obtain the metal titanium felt with variable aperture;
(5) The metal felt is cut into proper size according to the use requirement.
The metal titanium felt of the embodiment 4 has an ordered pore diameter structure, and really realizes ordered, controllable, convenient and suitable for various materials and various porosity requirements.
Claims (2)
1. The preparation method of the metal felt with the ordered pore diameter structure is characterized by comprising the following steps of:
(1) Cutting and punching the metal sheet by utilizing laser, and forming holes with the diameter of 5-5000 mu m on the metal sheet, wherein the diameters of the holes on each layer of the metal sheet are the same, and the hole pitches are the same; (2) Orderly stacking a plurality of layers of metal sheets together in a hole dislocation mode; (3) Interlayer fixing is carried out on the laminated metal sheets to form a metal felt;
the thickness of the metal sheet is 0.05-0.2 mm, and the interlayer fixing method is vacuum solid phase sintering.
2. The metal felt with the ordered pore diameter structure obtained by the preparation method according to claim 1, which is characterized in that at least 2 layers of metal sheets with holes are directly laminated and fixed between layers in a hole dislocation mode, and the diameter of the holes of each layer of metal sheet is 5-5000 μm; the thickness of the metal sheet is 0.05-0.2 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210576764.XA CN114888460B (en) | 2022-05-25 | 2022-05-25 | Metal felt with ordered pore diameter structure and preparation method thereof |
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| CN202210576764.XA CN114888460B (en) | 2022-05-25 | 2022-05-25 | Metal felt with ordered pore diameter structure and preparation method thereof |
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| CN114888460A CN114888460A (en) | 2022-08-12 |
| CN114888460B true CN114888460B (en) | 2023-05-12 |
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| JP2008256364A (en) * | 2007-03-30 | 2008-10-23 | Kurita Water Ind Ltd | Filter for liquid chromatography, manufacturing method therefor, and liquid chromatography unit |
| CN101413071A (en) * | 2008-12-05 | 2009-04-22 | 西北有色金属研究院 | Metal polyporous material with gradient pore structure and preparation thereof |
| JP3216844U (en) * | 2018-04-04 | 2018-06-28 | 株式会社長峰製作所 | Perforated metal foil |
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| WO2008136236A1 (en) * | 2007-04-26 | 2008-11-13 | Mitsui Mining & Smelting Co., Ltd. | Clad filter material, and method for production of clad filter |
| CN104097357B (en) * | 2013-04-07 | 2016-06-01 | 宁波汇邦尼龙科技有限公司 | A kind of porous sound absorption material and working method thereof |
| CN103401003B (en) * | 2013-07-17 | 2016-08-17 | 南京大学昆山创新研究院 | Gas diffusion layers of Proton Exchange Membrane Fuel Cells and preparation method thereof |
| CN103331104B (en) * | 2013-07-19 | 2014-12-17 | 江苏大学 | Metal porous membrane preparation device based on laser shock wave effect |
| CN103949168B (en) * | 2014-04-29 | 2015-10-14 | 北京化工大学 | Porous metal film adopting stainless steel fibre sintering felt standby and preparation method thereof |
| JP6462375B2 (en) * | 2015-01-22 | 2019-01-30 | セーレン株式会社 | Porous metal foil with support and method for producing transparent metal foil |
| CN104942451B (en) * | 2015-07-03 | 2016-07-13 | 厦门大学 | The vacuum laser cutter sweep of a kind of porous metal material and method |
| CN205520110U (en) * | 2016-04-16 | 2016-08-31 | 嘉兴市雅士迪真皮座套有限公司 | Laser cutting machine is used in felt cutting |
| CN108568160A (en) * | 2018-04-04 | 2018-09-25 | 华南理工大学 | A kind of high-temperature nickel-base alloy multistage filter and manufacturing method |
| CN109177403A (en) * | 2018-08-09 | 2019-01-11 | 东华大学 | A kind of heat-protective clothing compound sandwich material and its preparation and application |
| CN215237836U (en) * | 2021-02-26 | 2021-12-21 | 华南理工大学 | Metal porous strip and powder composite rolling and sintering integrated device |
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- 2022-05-25 CN CN202210576764.XA patent/CN114888460B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008256364A (en) * | 2007-03-30 | 2008-10-23 | Kurita Water Ind Ltd | Filter for liquid chromatography, manufacturing method therefor, and liquid chromatography unit |
| CN101413071A (en) * | 2008-12-05 | 2009-04-22 | 西北有色金属研究院 | Metal polyporous material with gradient pore structure and preparation thereof |
| JP3216844U (en) * | 2018-04-04 | 2018-06-28 | 株式会社長峰製作所 | Perforated metal foil |
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