CN115446317A - Stainless steel porous filter pipe with double-layer structure and preparation method thereof - Google Patents
Stainless steel porous filter pipe with double-layer structure and preparation method thereof Download PDFInfo
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- CN115446317A CN115446317A CN202210947475.6A CN202210947475A CN115446317A CN 115446317 A CN115446317 A CN 115446317A CN 202210947475 A CN202210947475 A CN 202210947475A CN 115446317 A CN115446317 A CN 115446317A
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 72
- 239000010935 stainless steel Substances 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 32
- 238000005245 sintering Methods 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000011049 filling Methods 0.000 claims description 7
- 238000000462 isostatic pressing Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000011265 semifinished product Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims 2
- 229910000792 Monel Inorganic materials 0.000 claims 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims 1
- 229910001026 inconel Inorganic materials 0.000 claims 1
- 229910052759 nickel Inorganic materials 0.000 claims 1
- 239000010936 titanium Substances 0.000 claims 1
- 229910052719 titanium Inorganic materials 0.000 claims 1
- 239000003814 drug Substances 0.000 abstract description 2
- 229940079593 drug Drugs 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 239000013535 sea water Substances 0.000 abstract 1
- 239000010865 sewage Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 26
- 239000011148 porous material Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 239000002184 metal Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000005587 bubbling Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000005429 filling process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000004663 powder metallurgy Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000009694 cold isostatic pressing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Filtering Materials (AREA)
Abstract
The invention provides a stainless steel porous filter tube with a double-layer structure and a preparation method thereof. The stainless steel porous filter pipe with the double-layer structure and the preparation method thereof have the advantages that the porous filter pipe is formed at one time, the yield is high, and the filtering efficiency of the filter pipe is improved by increasing the filtering area in unit volume. The novel filter tube can be applied to the fields of high-end biological medicines, sewage treatment, seawater pre-stage purification and the like, and has huge market application value and potential.
Description
Technical Field
The invention relates to a stainless steel porous filter tube with a double-layer structure and a preparation method thereof, in particular to a preparation method of a stainless steel porous filter tube with a double-layer structure.
Background
The stainless steel porous filter tube is mainly used for filtering polyester, oil products, pharmacy, food and beverage and chemical products, and is also used for filtering water, air and the like. Compared with non-metal filter materials, the stainless steel porous filter material has the characteristics of high strength, good oxidation resistance, good thermal conductivity, good toughness, simple manufacturing process, long service life, reproducibility and the like, and has the special properties of corrosion resistance, high permeability, noise elimination and the like, so that the stainless steel porous filter material is widely applied to the aspects of metallurgy, electronics, food, medicine, environmental protection, aviation, chemical engineering, machinery and the like.
In the process of using the stainless steel filter element, in order to reduce the manufacturing cost and energy consumption of the filter system, engineering technicians often need to select a filter element with a relatively large filter area and filter flux on the premise of certain filter precision so as to ensure the efficient operation of the filter system. However, in the preparation process of the metal porous material, when the filtration precision is fixed, in order to ensure the mechanical property of the metal filter element, the filtration flux per unit area often has an optimal value, and the filtration flux is difficult to be increased by changing the pore structure of the metal porous material. The technical scheme of the invention solves the problem by increasing the filtering area in unit volume.
Powder metallurgy materials are typically prepared by compression molding methods including isostatic pressing, pressureless forming, injection molding, high energy forming, and the like. The application of the isostatic pressing technology in the preparation process of the powder metallurgy material can enable the prepared powder metallurgy material to achieve better molding and mechanical states, and can effectively reduce the manufacturing cost. The isostatic pressing technology is characterized by the following two aspects: firstly, in the application process of the isostatic pressing technology, each part of a product green body can be ensured to be kept in a constant state on pressure, and further, the uniformity of the mechanical property of each part of the product is ensured; secondly, the application of the isostatic pressing technology in the preparation of the metal porous material can better control the pore structure of the metal porous material and ensure the uniformity of the pore structure.
The novel stainless steel filter tube is prepared by adopting the independently designed novel metal porous filter tube forming die and a cold isostatic pressing technology, and the filtering area of the novel stainless steel filter tube can be increased by 20-50% on the premise of not increasing the occupied volume of the filter tube, so that the aim of improving the filtering efficiency is fulfilled. The novel stainless steel filter pipe has great practical application significance in the field of filtration.
Disclosure of Invention
The invention aims to provide a preparation method of a stainless steel porous filter tube with a double-layer structure, which is suitable for large-scale production. The technical scheme adopted by the invention mainly relates to a preparation method of a stainless steel porous filter tube with a double-layer structure, which is characterized by comprising the following preparation processes:
(1) Grading the screened 316L stainless steel powder with a certain granularity interval according to requirements, and uniformly mixing;
(2) Preparing a forming die of the stainless steel porous filter pipe with the double-layer structure, and realizing one-step press forming of the stainless steel porous filter pipe with the double-layer structure through the die;
(3) The double-layer stainless steel porous filter pipe forming die consists of an annular stainless steel base, an annular forming rigid sleeve and an annular rubber sleeve; the annular forming rigid sleeve 5 is fixed on the annular stainless steel base 4 through the base clamping groove 12; then, an annular rubber sleeve 7 is laid in the fixed annular forming rigid sleeve, the annular rubber sleeve is an integral body and is laid from inside to outside, and therefore the sealing performance of the die in the isostatic pressing process is guaranteed; after the materials are fed from the feeding hole, the annular rubber sleeve is sealed by a hoop 6 in cooperation with an annular sealing rubber plug 8 and a stainless steel plug 9 with a hole;
(4) Firstly, weighing a certain mass of powder in the step (1), and then filling and forming;
(5) Putting the semi-finished product of the porous filter pipe obtained in the step (4) into a cold isostatic press for pressing and forming, wherein the pressing pressure is 60-220MPa;
(6) Demoulding the stainless steel porous pipe green blank obtained in the step (5);
(7) Sintering the green body of the stainless steel porous membrane tube obtained in the step (6) in a sintering furnace in vacuum or under the protection of reducing or inert gas; the heating rate is 1-10 ℃/min during sintering, the sintering temperature is 1100-1280 ℃, and the temperature is kept for 0.5-3 hours; and (5) cooling and discharging to obtain the stainless steel porous filter tube.
As a first improvement of the invention, the annular rigid sleeve and the annular rubber sleeve in the novel forming die in the step (2) are respectively an integral body, so that the sealing performance of the die in the forming process of the double-layer structure filter pipe after assembly is ensured.
As a second improvement of the invention, the double-layer structure forming die in the step (2) is utilized, and the double-layer structure filtering pipe prepared has large filtering area and filtering flux compared with the traditional filtering filter element while the one-step press forming of the double-layer structure stainless steel porous filtering pipe is realized. The diameter of the outer layer of the prepared double-layer structure filter pipe is 40-110 mm, the diameter of the inner layer of the prepared double-layer structure filter pipe is 20-80 mm, the effective filtering area is increased by 20-50% on the premise that the volume occupied by the stainless steel filter pipe is not increased, and the purpose of improving the filtering efficiency is further achieved.
As a third step improvement of the invention, the sintering atmosphere of the sintering process in the step (6) is vacuum or atmosphere protection.
As a fourth improvement of the invention, the preparation method of the stainless steel porous filter tube is not limited to the preparation of the stainless steel porous filter tube, and the method is also used for preparing porous filter tubes made of other materials.
The double-layer structure stainless steel porous filter pipe prepared by the preparation method is mainly characterized in that the double-layer structure filter pipe prepared by a novel die has a large filter area in unit volume, and further the purpose of improving the filter efficiency is realized.
The invention is described in further detail below with reference to the figures and examples.
Drawings
FIG. 1 is a schematic cross-sectional view of a stainless steel filter tube with a double-layer structure;
FIG. 2 is a schematic view of a mold construction to which this patent relates;
FIG. 3 is a top view of a mold according to the present patent;
FIG. 4 is a schematic cross-sectional view of a mold base according to the present patent;
fig. 5 is a top view of the annular sealing rubber plug of the mold according to the present patent;
FIG. 6 is a top view of a perforated stainless steel plug of a mold according to the present patent;
FIG. 7 is a top view of an annular shaped rigid sleeve according to the present disclosure;
FIG. 8 is a cross-sectional view of an annular shaped rigid sleeve according to the teachings of the present disclosure;
FIG. 9 is a top plan view of an annular gum cover to which the present patent relates;
fig. 10 is a schematic cross-sectional view of an annular rubber sleeve according to the present invention.
Wherein: 1. an outer filter tube; 2. an inner filter tube; 3. a clear liquid outlet; 4. a stainless steel base; 5. forming a rigid sleeve; 6. clamping a hoop; 7. a rubber sleeve; 8. an annular sealing rubber plug; 9. a stainless steel plug with a hole; 10. connecting layer stainless steel powder; 11. stainless steel powder; 12. a base clamp groove; 13. cross reinforcing rib
Detailed Description
Example 1
Selecting a die with the length of 100cm, the diameter of an inner tube of 30mm and the diameter of an outer tube of 60mm, and after fixing the rubber sleeve 7, filling 316L stainless steel powder with the particle size of-180-300 meshes into the die, wherein the uniformity of the thickness of the powder in the die is ensured in the filling process; after the powder is filled, the annular sealing rubber plug 8 and the stainless steel plug 9 with the hole are plugged into a die, fixed by a hoop 6, and then placed into a cold isostatic press together with the die for pressing and forming, wherein the pressing pressure is 120MPa, and the pressure is maintained for 120s and then is released; taking out the formed rigid sleeve 5, the rubber sleeve 7 and the stainless steel base 4 after compression forming, putting the stainless steel powder porous tube green compact into a burning boat, filling alumina sand filler, and putting into a vacuum furnace to enterSintering in vacuum degree higher than 5 × 10 -2 Pa, the heating rate is 3 ℃/min, the sintering temperature is 1200 ℃, and the temperature is kept for 2.5 hours; and discharging the sintered product from the furnace to finally obtain the stainless steel porous filter tube with the double-layer structure. The maximum bubbling pressure of the double-layer structure stainless steel porous filter pipe is 5.2kPa through testing and calculation; the wall thickness of the inner pipe is 2.3mm, the wall thickness of the outer pipe is 2.5mm, the effective filtration area is 0.28 square meter, and the filtration area is 1.4 times of that of the traditional single-layer structure porous filtration pipe with the diameter of 60 mm.
Example 2
Selecting a die with the length of 100cm, the diameter of an inner tube of 35mm and the diameter of an outer tube of 65mm, and after fixing the rubber sleeve 7, filling 316L stainless steel powder with the particle size of-180-300 meshes into the die, wherein the uniformity of the thickness of the powder in the die is ensured in the filling process; after the powder is filled, the annular sealing rubber plug 8 and the stainless steel plug 9 with the hole are plugged into a die, fixed by a hoop 6, and then placed into a cold isostatic press together with the die for pressing and forming, wherein the pressing pressure is 120MPa, and the pressure is maintained for 120s and then is released; taking out the formed rigid sleeve 5, the rubber sleeve 7 and the stainless steel base 4 after press forming, putting the stainless steel powder porous tube green compact into a burning boat, filling alumina sand filler, and sintering in a vacuum furnace with the vacuum degree higher than 5 multiplied by 10 -2 Pa, the heating rate is 3 ℃/min, the sintering temperature is 1200 ℃, and the temperature is kept for 2.5 hours; and discharging the sintered product from the furnace to finally obtain the stainless steel porous filter tube with the double-layer structure. Testing and calculating to obtain the maximum bubbling pressure of the double-layer structure stainless steel porous filtering pipe of 5.0 kPa; the wall thickness of the inner pipe is 2.5mm, the wall thickness of the outer pipe is 2.6mm, the effective filtration area is 0.31 square meter, and the filtration area is 1.5 times of that of the traditional single-layer porous filtration pipe with the diameter of 65 mm.
Example 3
Selecting a die with the length of 100cm, the diameter of an inner tube of 50mm and the diameter of an outer tube of 85mm, after fixing the rubber sleeve 7, filling 316L stainless steel powder with the particle size of-60-140 meshes into the die, and ensuring the thickness uniformity of the powder in the die in the filling process; after the powder is filled, the annular sealing rubber plug 8 and the stainless steel plug 9 with the hole are plugged into a die, fixed by a hoop 6, and then placed into a cold isostatic press together with the die for pressing and forming, wherein the pressing pressure is 140MPa, and the pressure is maintained for 90s and then is released; after compression molding, taking out the molded rigid sleeve 5, the rubber sleeve 7 and the stainless steel base 4, putting the stainless steel powder porous tube green blank into a burning boat, burying the green blank with alumina sand filler, putting the green blank into a sintering furnace for sintering, wherein the sintering atmosphere is hydrogen, the heating rate is 5 ℃/min, the sintering temperature is 1250 ℃, and keeping the temperature for 3 hours; and discharging the sintered product from the furnace to finally obtain the stainless steel porous filter tube with the double-layer structure. Through testing and calculation, the maximum bubbling pressure of the double-layer structure stainless steel porous filtering pipe is 1.8kPa; the wall thickness of the inner pipe is 2.8mm, the wall thickness of the outer pipe is 3.0mm, the effective filtration area is 0.42 square meter, and the filtration area is 1.58 times of that of the traditional monolayer porous filtration pipe with the diameter of 85 mm.
Claims (5)
1. A stainless steel porous filter tube with a double-layer structure and a preparation method thereof are disclosed, and the specific preparation process comprises the following steps:
(1) Grading the screened 316L stainless steel powder with a certain granularity interval according to requirements, and uniformly mixing;
(2) Preparing a forming die of the stainless steel porous filter pipe with the double-layer structure, and realizing one-step press forming of the stainless steel porous filter pipe with the double-layer structure through the die;
(3) The double-layer stainless steel porous filter pipe forming die consists of an annular stainless steel base, an annular forming rigid sleeve and an annular rubber sleeve; the annular forming rigid sleeve 5 is fixed on the annular stainless steel base 4 through the base clamping groove 12; then, an annular rubber sleeve 7 is laid in the fixed annular forming rigid sleeve, the annular rubber sleeve is an integral body and is laid from inside to outside, and therefore the sealing performance of the die in the isostatic pressing process is guaranteed; after the materials are fed from the feeding hole, the annular rubber sleeve is sealed by a hoop 6 in cooperation with an annular sealing rubber plug 8 and a stainless steel plug 9 with a hole;
(4) Firstly, weighing a certain mass of powder in the step (1), and then filling and forming;
(5) Putting the semi-finished product of the porous filter pipe obtained in the step (4) into a cold isostatic press for pressing and forming, wherein the pressing pressure is 60-220MPa;
(6) Demoulding the stainless steel porous pipe green blank obtained in the step (5);
(7) Sintering the green body of the stainless steel porous membrane tube obtained in the step (6) in a sintering furnace in vacuum or under the protection of reducing or inert gas; the temperature rise rate is 1-10 ℃/min during sintering, the sintering temperature is 1100-1280 ℃, and the temperature is kept for 0.5-3 hours; and (5) cooling and discharging to obtain the stainless steel porous filter tube.
2. The stainless steel porous filter tube with the double-layer structure and the preparation method thereof according to claim 1, wherein a double-layer structure forming die is designed as a forming die to realize one-step press forming of the stainless steel porous filter tube with the double-layer structure; meanwhile, compared with the traditional filter element, the prepared double-layer structure filter pipe has large filter area and filter flux.
3. The double-layer structure forming die of claim 2, wherein the diameter of the outer layer of the prepared double-layer structure filter pipe is 40-110 mm, the diameter of the inner layer of the prepared double-layer structure filter pipe is 20-80 mm, and the effective filtering area is increased by 20-50% on the premise of not increasing the volume of the stainless steel filter pipe, so that the aim of improving the filtering efficiency is fulfilled.
4. The stainless steel porous filtering tube and the preparation method thereof according to claim 1, wherein the sintering atmosphere is vacuum or selected to be protected by reducing or inert gas for sintering.
5. A stainless steel porous filter tube and a preparation method thereof are characterized in that: the use of the stainless steel porous filter tube and the method for manufacturing the same according to claim 1 is not limited to the preparation of stainless steel filter tubes, but also can be used for the preparation of sleeve-type porous filter tubes made of other materials, such as nickel, monel, inconel, metallic titanium, alumina, zirconia, and the like.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210947475.6A CN115446317A (en) | 2022-08-09 | 2022-08-09 | Stainless steel porous filter pipe with double-layer structure and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210947475.6A CN115446317A (en) | 2022-08-09 | 2022-08-09 | Stainless steel porous filter pipe with double-layer structure and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101890500A (en) * | 2010-07-14 | 2010-11-24 | 安泰科技股份有限公司 | Method for preparing double-layer sintering metal powder filter element |
| JP2015536381A (en) * | 2013-10-14 | 2015-12-21 | ワールプール，ソシエダッド アノニマ | Porous component manufacturing method and component |
| CN208263081U (en) * | 2018-05-04 | 2018-12-21 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of cold isostatic compaction mould |
| CN110788325A (en) * | 2019-09-10 | 2020-02-14 | 西安石油大学 | Preparation method and application of stainless steel porous filter tube |
-
2022
- 2022-08-09 CN CN202210947475.6A patent/CN115446317A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101890500A (en) * | 2010-07-14 | 2010-11-24 | 安泰科技股份有限公司 | Method for preparing double-layer sintering metal powder filter element |
| JP2015536381A (en) * | 2013-10-14 | 2015-12-21 | ワールプール，ソシエダッド アノニマ | Porous component manufacturing method and component |
| CN208263081U (en) * | 2018-05-04 | 2018-12-21 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of cold isostatic compaction mould |
| CN110788325A (en) * | 2019-09-10 | 2020-02-14 | 西安石油大学 | Preparation method and application of stainless steel porous filter tube |
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Application publication date: 20221209 |