WO2004039522A1 - Metal powder injection molding material and metal powder injection molding method - Google Patents
Metal powder injection molding material and metal powder injection molding method Download PDFInfo
- Publication number
- WO2004039522A1 WO2004039522A1 PCT/EP2003/011624 EP0311624W WO2004039522A1 WO 2004039522 A1 WO2004039522 A1 WO 2004039522A1 EP 0311624 W EP0311624 W EP 0311624W WO 2004039522 A1 WO2004039522 A1 WO 2004039522A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- injection molding
- metal powder
- powder
- iron
- metal
- Prior art date
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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
- 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
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
-
- 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
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
Definitions
- Metal powder injection molding compound and method for metal powder injection molding are Metal powder injection molding compound and method for metal powder injection molding
- the present invention relates to a method for metal powder injection molding.
- Metal powder injection molding (“MIM”, or also with the generic term powder injection molding, PIM, also referred to in the US as “molding”) is a powder-metallurgical process in which the metal powder is produced by injection molding a thermoplastic injection molding compound and usually contains at least 30% by volume of a thermoplastic binder, a molded body is produced, from which the binder is subsequently removed, and which is then sintered into the finished workpiece.
- Metal powder injection molding combines the advantages of shaping by injection molding known from plastics technology with those of classic powder metallurgy. In classic powder metallurgy (powder metallurgy, often referred to as "P / M”), metal powder is used, often with up to 10% by volume.
- Lubricants such as oil or wax are added, pressed to the desired shape, and the pressing is then sintered.
- the advantage of the powder detailing process lies in the freedom of choice of materials. Powder-metallurgical processes can be used to sinter a metal-powder mixture to produce materials that cannot be produced using melt-metallurgy processes.
- a major disadvantage of classic powder metallurgy through pressing and sintering is that it is not suitable for the production of workpieces with more complex geometric shapes. For example, molds with undercuts, that is to say depressions transverse to the pressing direction, cannot be produced by pressing and sintering. With injection molding, however, practically any shape can be created.
- Metal powder injection molding is therefore mainly used for relatively small and complex shaped workpieces.
- d90 value is usually given in the unit micrometer. It means that 90% by weight of the powder in question is in the form of particles with a particle size of at most this d90 value.
- analogous d10 or d50 -Values specified (occasionally the capital letter "D” is used, ie the value is designated as D10, D50 or D90).
- the measured particle size corresponds to the sphere diameter; in the case of non-spherical particles, the measurement method (usually laser light diffraction) necessarily measures an effective diameter of the particles which corresponds to the diameter of spherical particles of the same volume.
- Comparatively fine metal, in particular iron or steel particles are always used in metal powder injection molding of iron. The fine metal particles are comparatively expensive and are difficult to handle due to their tendency to agglomerate and pyrophoric, but they have better sintering properties.
- low-alloy steels in the context of this invention are understood to mean steels with an iron content of at least 90% by weight, that is to say a content of alloy elements of at most 10% by weight
- high-alloy steels are typically considerable are easier to sinter, that is, they are easier to obtain homogeneous and dense sintered workpieces than low-alloy steels.
- iron or steel powder with a d90 value in the range from 0.5 to 20 micrometers is therefore always used, and only very rarely up to a maximum of about 35 micrometers.
- the pyrophoric properties of fine metal particles in powder injection molding compounds can be controlled.
- the fine powders with their tendency to agglomerate usually lead to uneven filling of the mold, and pyrophoricity of the metal powder is intolerable. For this reason, comparatively coarse particles with a d90 value above 40 micrometers are always used in classic powder metallurgy by pressing and sintering.
- EP 446708 A2 (equivalent: US 5,198,489), EP 465940 A2 (equivalent: US 5,362,791), EP 710 516 A2 (equivalent: US 5,802,437) and WO 94/25205 (equivalent: US 5,611,978) disclose various injection molding compositions for use in metal powder injection molding processes, and Metal powder injection molding process in which the binder is removed catalytically from injection molded parts, which are then sintered.
- EP 582 209 A1 (equivalent: US 5,424,445) teaches certain dispersants for use as auxiliaries in powder injection molding compositions.
- WO 01/81 467 A1 discloses a binder system for metal powder injection molding.
- WO 96/08 328 A1 discloses a typical composition for classic powder metallurgy by pressing and sintering with up to 10% by weight of a polyether wax as a lubricant.
- a metal powder injection molding compound which a) 40 to 70 vol .-% metal powder, including at least 50 wt .-%, based on the total amount of metal, of an iron-containing powder, of whose particles at least 90 wt .-%, based on the Amount of this iron-containing powder, an effective one
- the metal powder injection molding compound according to the invention contains a comparatively extremely coarse iron or iron alloy powder.
- the present invention is based on the knowledge that, in spite of the contrary opinion of the experts, such a coarse metal powder leads to satisfactory results in metal powder injection molding, specifically and in particular in the production of sintered molded parts from low-alloy steels.
- the coarse metal powders lead to a very considerable reduction in costs for the metal powder injection molding compounds and their handling is significantly easier.
- the sintered molded parts produced with the method according to the invention have at least as good properties as sintered molded parts produced with classic powder metallurgy, but can also be produced in very complex geometries.
- the metal powder injection molding composition according to the invention generally contains at least 40% by volume, preferably at least 45% by volume and generally at most 70% by volume, preferably at most 60% by volume, in each case based on the total volume of the injection molding composition, metal powder.
- this can be a single pure metal powder, a mixture of different pure metal powders, a pure powder of a metal alloy, a mixture of different metal alloy powders or a mixture of one or more pure metal powders with one or more metal alloy powders.
- the total composition of the powder determines the overall composition of the finished sintered molded part and is selected in accordance with the desired composition, with, as is also customary in powder metallurgy, an adjustment of the desired one Carbon, oxygen and / or nitrogen content of the finished sintered molded part can also take place during the sintering.
- At least one of the metal powders contained in the injection molding compound according to the invention contains iron.
- the iron containing powder is a low alloy steel or pure iron.
- the metal powder in the powder injection molding composition according to the invention consists entirely of iron, optionally with a carbon content in the range from 0 to 0.9% by weight.
- the metal powder consists of a low-alloy steel, the 0 to 0.9 wt .-% carbon, 0 to 10 wt .-% nickel, 0 to 6 wt .-% molybdenum, 0 to 11 wt .-% copper , 0 to 5 wt% chromium, 0 to 1 wt% manganese, 0 to 1 wt% silicon, 0 to 1 wt% vanadium, 0 to 1 wt% cobalt, the rest iron , wherein the total amount of the elements present which are not iron is at most 10% by weight.
- the total amount of the metal powder contained in the metal powder injection molding compound according to the invention is preferably at least 90% by weight of iron.
- At least 50% by weight of the metal powder, based on the total amount of metal powder, in the powder injection molding composition according to the invention consist of the iron-containing powder.
- at least 60% by weight and, in a particularly preferred manner, at least 80% by weight of the metal powder, based on the total amount of metal powder, in the powder injection molding composition according to the invention consist of the iron-containing powder.
- only the iron-containing powder is used as the metal powder.
- iron-containing powder which optionally contain further iron in addition to other elements or even consist of iron.
- master alloy technique a low-alloy steel is produced from iron powder and a powder from an iron-free alloy of the desired alloy elements or from a corresponding high-alloy steel or corresponding mixtures (“pre-alloyed” or “alloyed” powder).
- the metal powder present in the powder injection molding composition consists of an iron-containing powder, the particles of which in turn at least 90% by weight, based on the amount of this iron
- the metal powder in the metal powder injection molding composition according to the invention contains at least 50% by weight of an iron-containing powder with a particle size, expressed as a d90 value, of at least 40 micrometers.
- the proportion of metal powder, which is not formed from this iron-containing powder is any, for the metal powder injection molding suitable metal powder or powder mixture, and is selected according to the desired final composition of the sintered molded parts to be produced.
- the iron-containing powder in the injection molding composition according to the invention consists of particles, of which at least 90% by weight, based on the amount of this iron-containing powder, have an effective diameter of at least 40 micrometers. This effective diameter is preferably at least 50 micrometers and in a particularly preferred manner at least 60 micrometers.
- the iron-containing powder has a d90 value of at least 40, preferably of at least 50 and in a particularly preferred manner of at least 60.
- a very suitable d90 value is 70, for example.
- the d90 value is determined by means of laser light diffraction the standard ISO / DIS 13320 "Particle Size Analysis Guide to Laser Diffraction".
- the metal powders used in the injection molding composition according to the invention are common commercial products.
- the metal powder injection molding composition according to the invention generally contains at least 30% by volume, preferably at least 40% by volume and generally at most 60% by volume, preferably at most 55% by volume, in each case based on the total volume of the injection molding composition thermoplastic binder.
- the main task of the binder is to impart thermoplastic properties to the powder injection molding compound, and an essential criterion for the suitability of a particular thermoplastic as a binder is its removability after the injection molding.
- Various binders and processes for removing binders (“debinding”) from powder injection molded parts are known, for example thermal debinding by pyrolysis of the thermoplastic, debinding by using a solvent or catalytic debinding by catalytic decomposition of the thermoplastic.
- a thermoplastic binder of the powder injection molding composition according to the invention any thermoplastic binder known for powder injection molding can be selected.
- a catalytically removable binder is conveniently used.
- binder systems are usually based on polyoxymethylene as a thermoplastic. Polyoxymethylene depolymerizes acid catalyzed and can thus be removed from the injection molded parts quickly and at comparatively low temperatures.
- the thermoplastic binder preferably consists of a mixture of 50 to 100% by weight of a polyoximethylene homo- or copolymer and 0 to 50% by weight of a polymer immiscible with the polyoximethylene homo- or copolymer, which can be removed thermally without residue, or a mixture of such polymers.
- Such binders are known and for example in EP 446 708 A2, EP 465940 A2 and WO 01/81467 A1, the teachings of which are hereby expressly incorporated by reference.
- the powder injection molding composition according to the invention optionally also contains dispersion auxiliaries and / or other auxiliaries in an amount of up to 5% by volume. It preferably contains at least 1% by weight of dispersing aids and / or other auxiliaries. Dispersing aids serve to prevent segregation processes and are known, for example, from the documents referred to above and from EP 582209 A1, the teaching of which is also expressly referred to here. Other auxiliaries are usually added to influence the rheological properties of the powder injection molding compound. As a further aid, carbon is also occasionally added, usually in the form of graphite or in the form of pyrolyzable polymers, in order to adjust the carbon content of the sintered molding during sintering. These measures are known, for example from the documents referred to above.
- the powder injection molding composition according to the invention is produced in the usual way by mixing its components.
- the preparation is preferably carried out by thorough mixing in the melt or at least in dough form. All apparatuses in which dough-like to liquid substances can be thoroughly mixed are suitable, for example heatable kneaders.
- the powder injection molding composition according to the invention is produced in the form of particles which are suitable for loading conventional injection molding machines, for example extrudates, extrudates, pellets or broken plasticine.
- the powder injection molding process according to the invention is carried out in the same way as conventional powder injection molding processes.
- the injection molding compound according to the invention (the so-called “feedstock”) is deformed by injection molding into so-called “green compacts”, the injection molded parts are freed from the binder (the so-called “debinding”) and the so-called “brown compacts” are thereby produced from the green compacts and the brown compacts become finished sintered parts sintered.
- the feedstock is deformed in a conventional manner using conventional injection molding machines.
- the molded articles are freed from the thermoplastic binder in a conventional manner, for example by pyrolysis or by solvent treatment.
- the binder is preferably removed catalytically from the preferred injection molding composition according to the invention with a binder based on polyoxymethylene, in that the green compacts are heat-treated in a known manner with an atmosphere containing a gaseous acid.
- This atmosphere is created by evaporating an acid with sufficient vapor pressure, conveniently by passing a carrier gas, in particular nitrogen, through a storage vessel with an acid, advantageously nitric acid, and then introducing the acidic one Gases in the debinding furnace.
- the optimal acid concentration in the debinding furnace depends on the desired steel composition and the dimensions of the workpiece and is determined in individual cases through routine tests. In general, treatment in such an atmosphere at temperatures in the temperature range from 20.degree. C. to 180.degree. C. over a period of 10 minutes to 24 hours will suffice for debinding. After debinding, any residues of the thermoplastic binder and / or of the auxiliaries which are still present are pyrolyzed during heating to the sintering temperature and thereby completely removed.
- the shaped body is sintered in a sintering furnace to form the sintered molded part.
- Sintering is carried out according to known methods. Depending on the desired result, sintering takes place, for example, under air, hydrogen, nitrogen, under gas mixtures or in vacuo.
- the sintering and optimum composition of the furnace atmosphere, the pressure and the optimal temperature control depend on the exact chemical composition of the steel used or to be produced and are known or can easily be determined in individual cases using a few routine tests.
- the optimal heating rates are easily determined by a few routine tests, usually they are at least 1 ° C. per minute, preferably at least 2 ° C. per minute and in a particularly preferred manner at least 3 ° C. per minute. For economic reasons, the highest possible heating rate is generally sought. In order to avoid a negative influence on the quality of the sintering, however, a heating rate below 20 ° C per minute will usually have to be set. Under certain circumstances, it is advantageous to observe a waiting time at a temperature which is below the sintering temperature during the heating to the sintering temperature, for example over a period of 30 minutes to two hours, for example an hour, a temperature in the range from 500 ° C. to 700 ° C, for example 600 ° C to keep.
- the sintering time ie the holding time at the sintering temperature
- the sintering time is generally at least 15 minutes and preferably at least 30 minutes.
- the total duration of the sintering process essentially determines the production rate, which is why the sintering is preferably carried out in such a way that the sintering process does not take an unsatisfactorily long time from an economic point of view.
- the sintering process (including heating up, but without cooling down phase) can be completed after a maximum of 14 hours.
- the sintering process is ended by cooling the sintered parts.
- a specific cooling process may be required, for example, cooling as quickly as possible in order to maintain high-temperature phases or to prevent the components of the steel from segregating.
- the upper limit of the cooling rate is reached when sintered molded parts occur in economically unsatisfactorily large quantities with defects such as cracking, tearing or deformation caused by cooling too quickly. The optimal cooling rate is therefore easily determined in a few routine tests.
- any desired aftertreatment for example sinter hardening, austenitizing, tempering, hardening, tempering, carburizing, case hardening, carbonitriding, nitriding, steam treatment, solution annealing, quenching in water or oil and / or hot isostatic pressing of the sintered molded parts or combinations of these treatment steps be made.
- Some of these treatment steps - such as sinter hardening, nitriding or carbonitriding - can also be carried out in a known manner during the sintering.
- the granules were processed with a screw injection molding machine into tensile test bars with a length of 85.5 mm and a diameter of 4 mm (according to MPIF Standard 50, 1992).
- the moldings were catalytically debindered in a chamber furnace at 110 ° C. in a nitrogen, to which 25 ml / h of concentrated nitric acid were metered in.
- the samples were then sintered in an electrically heated oven in dry nitrogen by heating at a heating rate of 5 K / min to 1360 ° C., holding at this temperature for one hour and slow cooling in the oven.
- the density of the samples was more than 7.1 g / cm 3 .
- the metallographic examination of cross sections showed a ferritic / pearlitic structure with elongated pores.
- the carbon content of the samples was 0.5% by weight.
- the samples were heat treated by austenitizing at 870 ° C, oil quenching and tempering at 200 ° C for one hour. Her hardness was then 43 HRC
- the density achieved after sintering was 7.3 g / cm 3 and the carbon content was 0.5% by weight.
- the structure was somewhat more uniform than in the sample from Example 1 and the proportion of elongated pores was lower.
- a hardness of 46 HRC was achieved after the heat treatment.
- the density reached after sintering was 7.6 g / cm 3 , the carbon content was 0.5% by weight. All pores were round and smaller than in Examples 1 or 2. After the heat treatment, a hardness of 55 HRC was achieved.
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Abstract
Description
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002503834A CA2503834A1 (en) | 2002-10-29 | 2003-10-21 | Metal powder injection molding material and metal powder injection molding method |
JP2004547537A JP2006505688A (en) | 2002-10-29 | 2003-10-21 | Metal injection molding material and metal injection molding method |
EP03769426A EP1558417A1 (en) | 2002-10-29 | 2003-10-21 | Metal powder injection molding material and metal powder injection molding method |
US10/533,315 US20060099103A1 (en) | 2002-10-29 | 2003-10-21 | Metal powder injection molding material and metal powder injection molding method |
AU2003278115A AU2003278115A1 (en) | 2002-10-29 | 2003-10-21 | Metal powder injection molding material and metal powder injection molding method |
MXPA05003960A MXPA05003960A (en) | 2002-10-29 | 2003-10-21 | Metal powder injection molding material and metal powder injection molding method. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10250526 | 2002-10-29 | ||
DE10250526.8 | 2002-10-29 |
Publications (1)
Publication Number | Publication Date |
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WO2004039522A1 true WO2004039522A1 (en) | 2004-05-13 |
Family
ID=32185285
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/011624 WO2004039522A1 (en) | 2002-10-29 | 2003-10-21 | Metal powder injection molding material and metal powder injection molding method |
Country Status (10)
Country | Link |
---|---|
US (1) | US20060099103A1 (en) |
EP (1) | EP1558417A1 (en) |
JP (1) | JP2006505688A (en) |
KR (1) | KR20050059280A (en) |
CN (1) | CN1708372A (en) |
AU (1) | AU2003278115A1 (en) |
CA (1) | CA2503834A1 (en) |
MX (1) | MXPA05003960A (en) |
RU (1) | RU2005116300A (en) |
WO (1) | WO2004039522A1 (en) |
Cited By (3)
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WO2007003606A1 (en) * | 2005-07-05 | 2007-01-11 | Basf Aktiengesellschaft | Polyoxymethylenes containing iron powder |
CN103981436A (en) * | 2014-06-06 | 2014-08-13 | 海安县鹰球粉末冶金有限公司 | Metal powder injection molded high-strength martensite aged steel and preparation method thereof |
WO2020048726A1 (en) * | 2018-09-07 | 2020-03-12 | Isabellenhütte Heusler Gmbh & Co. Kg | Production method for an electrical resistance element and corresponding resistance element |
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KR100707855B1 (en) * | 2005-07-05 | 2007-04-17 | 주식회사 엔씨메탈 | Manufacturing method of metal fine particles-feedstock for powder injection molding |
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KR20080027171A (en) * | 2006-09-22 | 2008-03-26 | 세이코 엡슨 가부시키가이샤 | Method for producing sintered body and sintered body |
JP4420003B2 (en) * | 2006-09-22 | 2010-02-24 | セイコーエプソン株式会社 | Molded body forming composition |
JP4483880B2 (en) * | 2007-03-15 | 2010-06-16 | セイコーエプソン株式会社 | Molded body forming composition, degreased body and sintered body |
US20100007169A1 (en) * | 2008-07-11 | 2010-01-14 | Trinh Anh Hieu Nguyen | Vehicle protection assembly |
DE102008059191A1 (en) * | 2008-11-27 | 2010-06-02 | Schaeffler Kg | Clamping unit for a traction device clamping device |
BRPI0805606A2 (en) * | 2008-12-15 | 2010-09-14 | Whirlpool S.A | composition of particulate materials for forming self-lubricating sintered steel products, self-lubricating sintered steel product and process for obtaining self-lubricating sintered steel products |
US20100178194A1 (en) * | 2009-01-12 | 2010-07-15 | Accellent, Inc. | Powder extrusion of shaped sections |
WO2010115837A1 (en) * | 2009-04-09 | 2010-10-14 | Basf Se | Method for producing a turbine wheel for an exhaust gas turbocharger |
AT12364U1 (en) * | 2010-10-07 | 2012-04-15 | Plansee Se | COLLIMATOR FOR X-RAY, GAMMA OR PARTICLE RADIATION |
US9162927B2 (en) * | 2011-03-16 | 2015-10-20 | Basf Se | Process for producing metallic or ceramic shaped bodies |
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DE4225619A1 (en) * | 1992-08-03 | 1994-02-10 | Basf Ag | Alkoxylation products |
DE4314694C1 (en) * | 1993-05-04 | 1994-05-11 | Basf Ag | Prepn. of sinter mouldings from a mixt. of a sinterable powder and an oxymethylene binding agent - involving removal of binding agent by treatment with a gaseous acid which is solid at room temp. |
DE4435904A1 (en) * | 1994-10-07 | 1996-04-11 | Basf Ag | Process and injection molding compound for the production of metallic moldings |
JP2955754B1 (en) * | 1998-06-01 | 1999-10-04 | 有限会社モールドリサーチ | Composition for injection molding of metal powder and injection molding and sintering method using the composition |
DE10019447A1 (en) * | 2000-04-19 | 2001-10-25 | Basf Ag | An inorganic material binder useful for preparation of metallic and ceramic molded bodies removable in two stages without residue, giving green body and metallic or ceramic molded bodies devoid of pores and cracks |
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2003
- 2003-10-21 CN CNA2003801024499A patent/CN1708372A/en active Pending
- 2003-10-21 MX MXPA05003960A patent/MXPA05003960A/en unknown
- 2003-10-21 WO PCT/EP2003/011624 patent/WO2004039522A1/en not_active Application Discontinuation
- 2003-10-21 KR KR1020057006819A patent/KR20050059280A/en not_active Application Discontinuation
- 2003-10-21 JP JP2004547537A patent/JP2006505688A/en not_active Withdrawn
- 2003-10-21 CA CA002503834A patent/CA2503834A1/en not_active Abandoned
- 2003-10-21 AU AU2003278115A patent/AU2003278115A1/en not_active Abandoned
- 2003-10-21 US US10/533,315 patent/US20060099103A1/en not_active Abandoned
- 2003-10-21 EP EP03769426A patent/EP1558417A1/en not_active Ceased
- 2003-10-21 RU RU2005116300/02A patent/RU2005116300A/en not_active Application Discontinuation
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EP0446708A2 (en) * | 1990-03-08 | 1991-09-18 | BASF Aktiengesellschaft | Thermoplastic materials for manufacturing metallic articles |
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DATABASE COMPENDEX [online] ENGINEERING INFORMATION, INC., NEW YORK, NY, US; ARAKIDA Y ET AL: "Powder injection molding as a metal forming process. Effects of powder morphology, size and size distribution", XP002269475, Database accession no. EIX92011131878 * |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007003606A1 (en) * | 2005-07-05 | 2007-01-11 | Basf Aktiengesellschaft | Polyoxymethylenes containing iron powder |
CN103981436A (en) * | 2014-06-06 | 2014-08-13 | 海安县鹰球粉末冶金有限公司 | Metal powder injection molded high-strength martensite aged steel and preparation method thereof |
WO2020048726A1 (en) * | 2018-09-07 | 2020-03-12 | Isabellenhütte Heusler Gmbh & Co. Kg | Production method for an electrical resistance element and corresponding resistance element |
US11373787B2 (en) | 2018-09-07 | 2022-06-28 | Isabellenhuette Heusler Gmbh & Co. Kg | Production method for an electrical resistance element and corresponding resistance element |
Also Published As
Publication number | Publication date |
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MXPA05003960A (en) | 2005-06-22 |
EP1558417A1 (en) | 2005-08-03 |
US20060099103A1 (en) | 2006-05-11 |
CN1708372A (en) | 2005-12-14 |
AU2003278115A1 (en) | 2004-05-25 |
CA2503834A1 (en) | 2004-05-13 |
KR20050059280A (en) | 2005-06-17 |
JP2006505688A (en) | 2006-02-16 |
RU2005116300A (en) | 2006-02-10 |
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