WO2007004941A1 - Stainless steel for filter applications. - Google Patents
Stainless steel for filter applications. Download PDFInfo
- Publication number
- WO2007004941A1 WO2007004941A1 PCT/SE2006/000605 SE2006000605W WO2007004941A1 WO 2007004941 A1 WO2007004941 A1 WO 2007004941A1 SE 2006000605 W SE2006000605 W SE 2006000605W WO 2007004941 A1 WO2007004941 A1 WO 2007004941A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- weight
- filter
- manganese
- density
- stainless steel
- Prior art date
Links
Classifications
-
- 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
- B01D39/2031—Metallic material the material being particulate
- B01D39/2037—Metallic material the material being particulate otherwise bonded
-
- 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
- B01D39/2031—Metallic material the material being particulate
- B01D39/2034—Metallic material the material being particulate sintered or bonded by inorganic agents
-
- 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
- B01D39/2041—Metallic material the material being filamentary or fibrous
- B01D39/2044—Metallic material the material being filamentary or fibrous sintered or bonded by inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/14—Sintered material
Definitions
- the invention relates to materials for filter. Specifically the invention concerns materials for filters for removing harmful constituents from combustion engines.
- Filters which are available today for filtering particles from diesel engines are commonly made of ceramics, such as silicon carbide.
- the particles, which are captured in the filter, can be removed by combustion at high temperature.
- a problem encountered with ceramic filters is lack of thermal and mechanical shock resistance.
- the ceramic filters also have limitations in geometry, i.e. there are limitations as to the configuration of the filter.
- the lifetime of a filter is determined of the decrease of the permeability of gas through the filter.
- the oxides grow on the surface of the metal filling. This means that the porosity and thus the permeability of gas through the filter are decreased. Therefore, a less oxide formation will result in improved performance and increased lifetime of the filter.
- the material includes carefully controlled amounts of manganese.
- the manganese content should be between 0.5 and 3% by weight of the sintered steel. By adding manganese in this range the permeability will be maintained during a longer time of use due to less oxidation of the sintered steel.
- Other elements of the sintered steel are 10-30% by weight of chromium, 5-25% by weight of nickel, 1-4% by weight of silicon and 0-3% by weight of molybdenum.
- the amount of inevitable impurities are normally less than 2% by weight, preferably less than 0.5% by weight.
- the filter may also have a density less than 70% of full density. Preferably the density is between 25 and 60% of full density. Higher density will not give enough permeability of gas and lower density gives too low filtering efficiency and low mechanical strength. Within this density range the permeability of the filter will be sufficient.
- the filter may include reinforcement which enhances the strength of the filter.
- the reinforcement may be in the form of fibres, wire or mesh.
- the powders used for the preparation of the sintering material according to the invention are stainless steel powders having an elevated, controlled manganese content. Specifically these powders comprise 10-30% chromium, 5- 25% nickel, 0.5-3% manganese, 1-4% silicon and 0-3% by weight of molybdenum.
- Powders having a similar chemical composition are known from the US patents 3 980 444 and 4 964 909. These known powders are however used within the powder metallurgical field but, in contrast to the powders according to the present invention, the known powders are compacted and sintered to high densities.
- silicon content this should be kept above 1% by weight to limit the oxygen content of the powder and below 4% by weight since higher silicon content does not lower the oxygen content further.
- the powder according to the invention may be mixed with a binder and/or lubricant material to facilitate e.g. consolidation .
- the powder may be spread onto a support to form a filter material.
- the filter material may be subsequently sintered.
- the powder is consolidated in a mould to form a filter element, with or without reinforcement.
- a reinforcement may be provided the powder metal during manufacturing of a filter material.
- the reinforcement may be fibres, wire or mesh e.g. expanded metal.
- the reinforcement may in one embodiment be manufactured of a stainless steel material.
- Sintering may be performed in hydrogen or vacuum atmosphere at a temperature of 1120° to 135O 0 C.
- sintering may also include vaporisation of binder.
- the sintering and vaporisation may also be performed as separate treatments
- manganese in the amounts according to the invention will reduce the oxidation of the filter at elevated temperatures and therefore extend the life of the filter. Oxidation will result in less permeability of the filter and hence the performance of the filter is deteriorated in a shorter period of time.
- Filter specimens were produced from the iron-based powder according to the invention and from an iron-based reference powder.
- the filter specimens were circular specimens having a diameter of 10 mm and a thickness of 0.5 mm.
- the filter specimens where manufactured to have a density of 40% of full density.
- the sintering was performed at 1250°C for 30 minutes.
- Table 1 the chemical analysis in weight percent of various powders are presented.
- the reference powder is 310B, which is available from H ⁇ ganas AB, Sweden.
- the filter samples where then heated to a predetermined temperature of 800° C for 2 minutes in air and then cooled to room temperature for 30 seconds. This cycle was then repeated for a period of 20 hours. Every 15th cycle the weight of the samples was recorded to measure the oxide build-up. The purpose of this test is to provoke and measure oxidation of the samples.
- diagram 1 the dependency of time and weight increase is presented for each material tested. The effect of certain contents of manganese is clear. From diagram 1 it can be seen that a remarkable decrease in weight increase is achieved by adding manganese in a content of about 2% by weight. A preferred range for the manganese content is between 1% and 3%.
- Pressure drop measurements were performed to evaluate the performance of the filter after certain time of use. The measurements were performed by applying 0.5 bar compressed air on the inlet in a filter holding device. The pressure loss caused by the filter was then measured. All filters were tested before and after oxidisation. The pressure drop was then calculated as the difference between the oxidised and non-oxidised filter. In table 2 the results from the pressure drop measurements are presented. The weight increase in example 1 corresponds to the pressure drop which is presented in example 2. Therefore the weight increase illustrates the pressure drop .
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES06733430.0T ES2471372T3 (en) | 2005-07-01 | 2006-05-24 | Stainless steel for filter applications |
US11/922,338 US20090038280A1 (en) | 2005-07-01 | 2006-05-24 | Stainless Steel For Filter Applications |
EP06733430.0A EP1899586B1 (en) | 2005-07-01 | 2006-05-24 | Stainless steel for filter applications. |
CN2006800236446A CN101213355B (en) | 2005-07-01 | 2006-05-24 | Stainless steel for filter applications. |
US13/090,749 US20110192127A1 (en) | 2005-07-01 | 2011-04-20 | Stainless steel for filter applications |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0501543-3 | 2005-07-01 | ||
SE0501543 | 2005-07-01 | ||
US71650905P | 2005-09-14 | 2005-09-14 | |
US60/716,509 | 2005-09-14 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/090,749 Continuation US20110192127A1 (en) | 2005-07-01 | 2011-04-20 | Stainless steel for filter applications |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007004941A1 true WO2007004941A1 (en) | 2007-01-11 |
Family
ID=37604711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2006/000605 WO2007004941A1 (en) | 2005-07-01 | 2006-05-24 | Stainless steel for filter applications. |
Country Status (4)
Country | Link |
---|---|
US (2) | US20090038280A1 (en) |
EP (1) | EP1899586B1 (en) |
RU (1) | RU2397006C2 (en) |
WO (1) | WO2007004941A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7979252B2 (en) | 2007-06-21 | 2011-07-12 | Microsoft Corporation | Selective sampling of user state based on expected utility |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5009857A (en) * | 1988-03-10 | 1991-04-23 | Schwaebische Huettenwerke Gmbh | Filter for gases |
US5123243A (en) * | 1985-08-05 | 1992-06-23 | Brehk Ventures | Method and apparatus for trapping and incinerating particulate matter found in diesel engine exhaust |
US20040099354A1 (en) * | 2002-01-24 | 2004-05-27 | Hiromu Izumida | Steel wire for heat-resistant spring, heat-resistant spring and method for producing heat-resistant spring |
DE10321524A1 (en) * | 2003-05-14 | 2004-12-16 | Super-Lub Technology Gmbh | Material for high temperature applications comprises an iron-based sintered alloy with additions of chromium, nickel, copper, solid lubricant, molybdenum, manganese, silicon, phosphorus and niobium |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3993445A (en) * | 1974-11-27 | 1976-11-23 | Allegheny Ludlum Industries, Inc. | Sintered ferritic stainless steel |
US4014680A (en) * | 1975-01-22 | 1977-03-29 | Allegheny Ludlum Industries, Inc. | Prealloyed stainless steel powder for liquid phase sintering |
US3980444A (en) * | 1975-01-22 | 1976-09-14 | Allegheny Ludlum Industries, Inc. | Sintered liquid phase stainless steel |
US4420336A (en) * | 1982-02-11 | 1983-12-13 | Scm Corporation | Process of improving corrosion resistance in porous stainless steel bodies and article |
US4535034A (en) * | 1983-12-30 | 1985-08-13 | Nippon Steel Corporation | High Al heat-resistant alloy steels having Al coating thereon |
US4562039A (en) * | 1984-06-27 | 1985-12-31 | Pall Corporation | Porous metal article and method of making |
SE459863B (en) * | 1986-07-04 | 1989-08-14 | Hoeganaes Ab | HEAT-INSULATING SINTERED COMPONENT OF YEAR-BASED POWDER AND SET TO MANUFACTURE THIS |
US5019311A (en) * | 1989-02-23 | 1991-05-28 | Koslow Technologies Corporation | Process for the production of materials characterized by a continuous web matrix or force point bonding |
DE4021495A1 (en) * | 1990-07-05 | 1992-01-09 | Schwaebische Huettenwerke Gmbh | EXHAUST FILTER |
DE4029749A1 (en) * | 1990-09-20 | 1992-03-26 | Schwaebische Huettenwerke Gmbh | FILTER |
DE4110285A1 (en) * | 1991-03-28 | 1992-10-01 | Schwaebische Huettenwerke Gmbh | FILTER OR CATALYST BODY |
US5204067A (en) * | 1991-07-11 | 1993-04-20 | Schwaebische Huettenwerke Gmbh | Filter |
DE4234930A1 (en) * | 1992-10-16 | 1994-04-21 | Schwaebische Huettenwerke Gmbh | Filters for separating contaminants from exhaust gases |
JPH07138713A (en) * | 1993-11-15 | 1995-05-30 | Daido Steel Co Ltd | Production of fe-based alloy powder and high corrosion resistant sintered compact |
DE19741498B4 (en) * | 1997-09-20 | 2008-07-03 | Evonik Degussa Gmbh | Production of a ceramic stainless steel mesh composite |
US6328779B1 (en) * | 2000-05-31 | 2001-12-11 | Corning Incorporated | Microwave regenerated diesel particular filter and method of making the same |
US6322605B1 (en) * | 2000-05-31 | 2001-11-27 | Corning Incorporated | Diesel exhaust filters |
US6352670B1 (en) * | 2000-08-18 | 2002-03-05 | Ati Properties, Inc. | Oxidation and corrosion resistant austenitic stainless steel including molybdenum |
SE0102102D0 (en) * | 2001-06-13 | 2001-06-13 | Hoeganaes Ab | High density stainless steel products and method of preparation thereof |
IL145250A0 (en) * | 2001-09-03 | 2002-06-30 | Hadasit Med Res Service | Natural sunscreen from cyanobacteria and lichens |
JP2005051739A (en) * | 2003-07-16 | 2005-02-24 | Ricoh Co Ltd | Image processing apparatus, image processing method, image processing program using the image processing method and recording medium with the image processing program stored thereon |
EP1741685B1 (en) * | 2005-07-05 | 2014-04-30 | MANN+HUMMEL Innenraumfilter GmbH & Co. KG | Porous beta-SiC containing shaped ceramic body and method of making it. |
-
2006
- 2006-05-24 WO PCT/SE2006/000605 patent/WO2007004941A1/en active Application Filing
- 2006-05-24 RU RU2008103818/15A patent/RU2397006C2/en not_active IP Right Cessation
- 2006-05-24 US US11/922,338 patent/US20090038280A1/en not_active Abandoned
- 2006-05-24 EP EP06733430.0A patent/EP1899586B1/en active Active
-
2011
- 2011-04-20 US US13/090,749 patent/US20110192127A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5123243A (en) * | 1985-08-05 | 1992-06-23 | Brehk Ventures | Method and apparatus for trapping and incinerating particulate matter found in diesel engine exhaust |
US5009857A (en) * | 1988-03-10 | 1991-04-23 | Schwaebische Huettenwerke Gmbh | Filter for gases |
US20040099354A1 (en) * | 2002-01-24 | 2004-05-27 | Hiromu Izumida | Steel wire for heat-resistant spring, heat-resistant spring and method for producing heat-resistant spring |
DE10321524A1 (en) * | 2003-05-14 | 2004-12-16 | Super-Lub Technology Gmbh | Material for high temperature applications comprises an iron-based sintered alloy with additions of chromium, nickel, copper, solid lubricant, molybdenum, manganese, silicon, phosphorus and niobium |
Non-Patent Citations (1)
Title |
---|
See also references of EP1899586A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7979252B2 (en) | 2007-06-21 | 2011-07-12 | Microsoft Corporation | Selective sampling of user state based on expected utility |
Also Published As
Publication number | Publication date |
---|---|
US20110192127A1 (en) | 2011-08-11 |
EP1899586A4 (en) | 2010-03-03 |
RU2008103818A (en) | 2009-08-10 |
EP1899586A1 (en) | 2008-03-19 |
RU2397006C2 (en) | 2010-08-20 |
US20090038280A1 (en) | 2009-02-12 |
EP1899586B1 (en) | 2014-04-30 |
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