EP1231003A2 - Verfahren zur Herstellung eines Formteils aus einem weichmagnetischen Verbundwerkstoff - Google Patents
Verfahren zur Herstellung eines Formteils aus einem weichmagnetischen Verbundwerkstoff Download PDFInfo
- Publication number
- EP1231003A2 EP1231003A2 EP02001397A EP02001397A EP1231003A2 EP 1231003 A2 EP1231003 A2 EP 1231003A2 EP 02001397 A EP02001397 A EP 02001397A EP 02001397 A EP02001397 A EP 02001397A EP 1231003 A2 EP1231003 A2 EP 1231003A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- mpa
- vol
- minutes
- mixture
- oxygen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
-
- 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
- B22F2003/023—Lubricant mixed with the metal powder
-
- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/241—Chemical after-treatment on the surface
-
- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
-
- 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
-
- 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
- B22F2998/10—Processes characterised by the sequence of their steps
-
- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Definitions
- the invention relates to a method for producing a Molded part made of a soft magnetic composite material, in particular for use as a magnetic core for a common rail injector, according to the genre of independent claims.
- thermoplastic resin mixed iron powder known, which is particularly for Suitable for the production of magnetic cores.
- an iron powder with phosphoric acid treat this iron powder then with a thermoplastic Resin to mix this mixture at a temperature below the glass transition temperature or Pressing the melting point of the thermoplastic resin, heat the pressed product to the thermoplastic Harden resin, and optionally tempering the obtained Component up to a temperature above the curing temperature of the thermoplastic resin.
- thermoplastic material Polyetherimide known under the trade name Ultem® and oligomers as described in WO 95/33589 and under the trade names Orgasol 3501 and Orgasol 2001 from Elf Atochem, France.
- EP 0 765 199 B1 provides the iron powder with a pressing aid or a lubricant mix that a metal stearate, a wax, a paraffin, a natural or synthetic fat derivative or an oligomer can be of the amide type.
- a pressing aid or a lubricant mix that a metal stearate, a wax, a paraffin, a natural or synthetic fat derivative or an oligomer can be of the amide type.
- lubricants or pressing aids the Kenolube® products from the company Höganäs AB, Sweden, H-wax® from 30%, and Promold® from Morton International, Cincinatti, USA, described using the iron powder in a proportion of preferably 0.2 to 0.8 percent by weight be mixed.
- this starting mixture is known from EP 0 765 199 B1 pressing at a pressure between 400 and 1800 MPa, and then in air at temperatures between 100 ° C and 600 ° C, preferably 200 ° C to 500 ° C, to anneal.
- a powdery powder produced according to EP 0 765 199 B1 Soft magnetic material is sold under the trade name Somaloy TM 500 distributed by Höganäs AB, Sweden and is in the company magazine SOMALOY TM 500, SMC 97-1, Pages 1-11, Höganäs AB, Sweden, characterized in more detail.
- Such soft magnetic composites are also used also in Jan Tengzelius, "Soft magnetic composites for electric motors ", conference proceedings Hagener Symposium, 1.12.2000, pages 211 to 227.
- the object of the present invention was to provide a method by which a powder mixture with a Iron powder in particular as a magnetic core for common rail injectors usable molded part made of a soft magnetic Composite with improved over the prior art mechanical and magnetic properties can be produced is.
- the methods according to the invention have compared to the state technology has the advantage that the molded parts produced afterwards or magnetic cores usual for common rail injectors Magnetic cores made of soft magnetic composite materials for example with mixtures of pure iron powder with polyamide binder, Pure iron powder with polyphenylene sulfide binder or pure iron powder with polyethylene binder are, especially with regard to mechanical strength, density, saturation polarization, magnetic Permeability, the specific electrical resistance, superior to surface hardness and flexural strength are.
- the molded parts produced according to the invention in the form of magnetic cores compared to magnetic cores made of polyphenylene sulfide-bonded composite material have an increased density of more than 7.3 g / cm 3 by at least 0.2 g / cm 3 , and they also have a significantly improved surface hardness and statistical bending strength, which is particularly evident in the critical area of the pole faces in an improved edge breaking strength under permanent load. In addition, they are less prone to material breakouts and less diesel fuel penetrates the workpiece structure.
- the molded parts produced according to the invention in the form of magnetic cores typically have a magnetic force of 95 N to 103 N, while corresponding molded parts made of polyphenylene sulfide-bonded composite material only reach about 80 N.
- the molded parts produced according to the invention when used as a magnetic core in common rail injectors are significantly higher Switching dynamics, especially one reduced by approx. 20 ⁇ s Switch-on time, a reduced energy requirement, approx. 50% higher mechanical strength, better mechanical Machinability and greater insensitivity to Manufacturing fluctuations in manufacturing.
- the gas atmosphere during Annealing a gas mixture with an oxygen content of 2 vol% is up to 7 vol%, being a mixture of air and nitrogen or a mixture of air and a rare gas, the proportion the air between 40 vol% and 10 vol%, in particular 10 vol% to 30 vol%, is particularly simple and inexpensive can be produced.
- Another improvement in magnetic and mechanical Properties of the molded parts obtained, particularly with regard to their density, is achieved when the annealing of the pressed parts in a two-stage process is, after pressing the starting mixture the molded part initially at a relatively low temperature annealed, then in a die tool or by hot plan forming pressed again, and finally at a higher one Temperature is annealed again.
- Molded parts made of a soft magnetic composite is preferably an oxide-bonded material, i.e. during the tempering process, one of the starting mixtures decomposes for example added metal stearate a metal oxide so that the presence of Oxygen at grain boundaries form iron oxide bridges, which the Effective improvement in structural cohesion are according to the invention manufactured molded parts over such Polymer-bonded soft magnetic composites too contain at least almost no organic components.
- the molded parts produced according to the invention have their higher density also has a lower porosity, which leads to a significantly improved thermomechanical long-term stability, especially against hot diesel fuel leads.
- a first embodiment of the invention is based on a Starting mixture with a pure iron powder and a pressing aid from the Höganäs company, Sweden, is marketed under the trade name Somaloy TM 500.
- the pure iron powder used is one high-purity iron powder with a phosphated surface, as described in EP 0 765 199 B1 as a lubricant Pressing aids, selected from the group of metal stearates, waxes, paraffins, natural or synthetic fat derivatives or the amide-type oligomers is clogged.
- the pure iron powder is preferred together with the under the molding aid known from the trade name Kenolube® Höganäs AB, Sweden.
- Kenolube® which is essentially an amide wax and contains zinc stearate in a proportion of 0.4% by weight 0.7% by weight, preferably 0.5% by weight to 0.6% by weight, of the pure iron powder added and with this to the starting mixture mixed.
- the starting mixture is then in a common die tool preferably at room temperature at a pressure between 600 MPa to 900 MPa, in particular 700 MPa to 800 MPa, for example in the form of a magnetic core pressed for common rail injectors.
- the molded part obtained is at temperatures between 380 ° C to 450 ° C, especially at approx. 425 ° C, over a period of 10 min to 120 min, in particular 30 min to 60 min, in a nitrogen-air mixture or in a Noble gas-air mixture annealed, the proportion of air between 50 vol% and 5 vol%, in particular 10 vol% to 30 % By volume, for example 20% by volume.
- the added Press aids partly decomposed and partly in one binding oxide converted.
- a mixture of an inert gas with oxygen for example a Nitrogen-oxygen mixture or an argon-oxygen mixture, be used, which has an oxygen content between 1 vol% and 10 vol%, in particular 2 vol% to 7 vol%, contains.
- the molded parts obtained after the tempering are preferred a final mechanical surface treatment, for example, subjected to grinding. This leads to improved mechanical properties and an improved Long-term stability of the molded parts obtained.
- the measured Magnetic force on such magnetic cores is usually approx. 5% to 10% increases.
- a second embodiment of the invention provides that deviates from the exemplary embodiment explained above after compressing the starting mixture to the First a tempering step at one temperature from 150 ° C to 400 ° C, especially at temperatures between 230 ° C and 310 ° C.
- This first tempering step can take place in air or an inert gas atmosphere such as an inert gas atmosphere or a nitrogen atmosphere respectively. However, it is preferably carried out analogously annealing in the first embodiment, in a gas mixture from an inert gas and oxygen, the proportion of the oxygen in the gas mixture between 10 vol% and Is 1% by volume.
- the gas atmosphere is particularly preferred in this exemplary embodiment again a mixture of air and nitrogen, the proportion of air between 50 vol% and 5 vol%, in particular 10 vol.% To 30 vol.%, For example 20 vol.%, is.
- the pressed, tempered molded part After the first tempering step, the pressed, tempered molded part another pressing at a pressure between 600 MPa to 900 MPa, in particular 700 MPa to 800 MPa, carried out at room temperature.
- this post-forming can also be carried out using hot plan forming in a suitable die tool at elevated temperature take place as described for example in DE 100 05 551.6 is.
- the molded parts obtained after the tempering are preferred then analogous to the first embodiment of a final one mechanical surface treatment, for example grinding.
- a molded part made of a soft magnetic composite material made of the phosphated pure iron powder Somaloy 500 with 0.6% by weight Kenolube according to the above exemplary embodiments has a statistical bending strength of at least 25 N / mm 2 , determined on test bars according to ISO 3327, and a surface hardness HB 2, 5 / 31.25 from at least 70.
- rings with an outer diameter of 40 mm, an inner diameter of 30 mm and a height of 5 mm have a magnetic polarization J 100 of at least 1.4 Tesla at 100 A / cm and a saturation polarization J s of at least 1.5 Tesla 500 amperes / cm, a coercive field strength H cB of a maximum of 3.0 amperes / cm, a maximum permeability ⁇ max . of at least 450 and a total loss ⁇ H + ⁇ W at 1 Tesla and 50 Hz of max. 8 W / kg measured.
- a saturation polarization of more than 1.7 Tesla and a maximum permeability of approx. 500 is achieved with a specific electrical resistance of approx. 10 ⁇ m.
- the density of the molded parts obtained is at least 7.30 g / cm 3 , it being possible to increase the density to up to approximately 7.5 g / cm 3 by the additional post-forming in a die tool or the additional hot plan forming.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Soft Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Claims (17)
- Verfahren zur Herstellung eines Formteils aus einem weichmagnetischen Verbundwerkstoff mit den Verfahrensschritten a.) Bereitstellen einer Ausgangsmischung mit einem Eisenpulver und einem Presshilfsmittel, b.) Verpressen der Ausgangsmischung zu einem Formteil und c.) Tempern des Formteils, dadurch gekennzeichnet, dass das Tempern in einem Gemisch aus einem Inertgas und Sauerstoff erfolgt, wobei der Anteil des Sauerstoffes in dem Gasgemisch zwischen 10 Vol% und 1 Vol% beträgt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Anteil des Sauerstoffes zwischen 7 Vol% und 2 Vol% beträgt, wobei das Gasgemisch insbesondere eine Mischung von Luft und Stickstoff oder von Luft und einem Edelgas ist.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Tempern bei Temperaturen zwischen 380°C bis 450°C, insbesondere 425°C, über eine Zeitdauer von 10 min bis 120 min, insbesondere 30 min bis 60 min, erfolgt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Verpressen bei Raumtemperatur bei einem Druck zwischen 600 MPa bis 900 MPa, insbesondere 700 MPa bis 800 MPa, erfolgt.
- Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass eine Ausgangsmischung eingesetzt wird, die ein phosphatiertes Reineisenpulver und ein Presshilfsmittel ausgewählt aus der Gruppe der Metallstearate, der Wachse, der Paraffine, der natürlichen oder synthetischen Fett-Derivate und der Oligomere vom Amid-Typ, insbesondere Kenolube®, enthält.
- Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die verpressten Formteile nach dem Verfahrensschritt b.) zunächst bei einer Temperatur von 150°C bis 400°C, insbesondere 230°C bis 310°C, in Luft, einer Inertgasatmosphäre oder einem Gasgemisch aus einem Inertgas und Sauerstoff, wobei der Anteil des Sauerstoffes in dem Gasgemisch zwischen 10 Vol% und 1 Vol% beträgt, getempert werden, danach nachgeformt und anschließend gemäß Verfahrensschritt c.) erneut getempert werden.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass zur Nachformung ein weiteres Verpressen bei einem Druck zwischen 600 MPa bis 900 MPa, insbesondere 700 MPa bis 800 MPa, oder ein Heißplanformen vorgenommen wird.
- Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass nach dem Tempern gemäß Verfahrensschritt c.) zumindest bereichsweise eine mechanische Bearbeitung, insbesondere ein Schleifen, der Oberfläche der Formteile erfolgt.
- Verfahren zur Herstellung eines Formteils aus einem weichmagnetischen Verbundwerkstoff mit den Verfahrensschritten a.) Bereitstellen einer Ausgangsmischung mit einem Eisenpulver und einem Presshilfsmittel, b.) Verpressen der Ausgangsmischung zu einem Formteil und c.) Tempern des Formteils, dadurch gekennzeichnet, dass nach dem Tempern des Formteils eine Nachformung und ein weiteres Tempern erfolgt.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass zur Nachformung ein weiteres Verpressen des Formteils bei einem Druck zwischen 600 MPa bis 900 MPa, insbesondere 700 MPa bis 800 MPa, bei Raumtemperatur oder ein Heißplanformen des Formteils vorgenommen wird.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass das weitere Tempern bei Temperaturen zwischen 380°C und 450°C, insbesondere 425°C, über eine Zeitdauer von 10 min bis 120 min, insbesondere 30 min bis 60 min, erfolgt.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass das Tempern gemäß Verfahrensschritt c.) bei einer Temperatur von 150°C bis 400°C, insbesondere 230°C bis 310°C, über eine Zeitdauer von 10 min bis 120 min, insbesondere 30 min bis 60 min, erfolgt.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass das Verpressen gemäß Verfahrensschritt b.) bei einem Druck zwischen 600 MPa bis 900 MPa, insbesondere 700 MPa bis 800 MPa, bei Raumtemperatur erfolgt.
- Verfahren nach einem der Ansprüche 9 bis 13, dadurch gekennzeichnet, dass das Tempern gemäß Verfahrensschritt c.) und/oder das weitere Tempern in Luft, in einer Stickstoffatmosphäre, einer Edelgasatmosphäre oder einem Gasgemisch aus einem Inertgas und Sauerstoff erfolgt, wobei der Anteil des Sauerstoffes in dem Gasgemisch zwischen 10 Vol% und 1 Vol% beträgt.
- Verfahren nach Anspruch 14, dadurch gekennzeichnet, dass das Tempern gemäß Verfahrensschritt c.) und das weitere Tempern in einem Gasgemisch aus einem Inertgas und Sauerstoff erfolgt, wobei der Anteil des Sauerstoffes in dem Gasgemisch zwischen 10 Vol% und 1 Vol% beträgt.
- Verfahren nach einem der Ansprüche 9 bis 15, dadurch gekennzeichnet, dass eine Ausgangsmischung eingesetzt wird, die ein phosphatiertes Reineisenpulver und ein Presshilfsmittel ausgewählt aus der Gruppe der Metallstearate, der Wachse, der Paraffine, der natürlichen oder synthetischen Fett-Derivate und der Oligomere vom Amid-Typ, insbesondere Kenolube®, enthält.
- Verfahren nach einem der Ansprüche 9 bis 16, dadurch gekennzeichnet, dass nach dem weiteren Tempern zumindest bereichsweise eine mechanische Bearbeitung, insbesondere ein Schleifen, der Oberfläche der Formteile erfolgt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10106172 | 2001-02-10 | ||
DE10106172A DE10106172A1 (de) | 2001-02-10 | 2001-02-10 | Verfahren zur Herstellung eines Formteils aus einem weichmagnetischen Verbundwerkstoff |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1231003A2 true EP1231003A2 (de) | 2002-08-14 |
EP1231003A3 EP1231003A3 (de) | 2005-07-20 |
EP1231003B1 EP1231003B1 (de) | 2009-02-25 |
Family
ID=7673570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02001397A Expired - Lifetime EP1231003B1 (de) | 2001-02-10 | 2002-01-19 | Verfahren zur Herstellung eines Formteils aus einem weichmagnetischen Verbundwerkstoff |
Country Status (3)
Country | Link |
---|---|
US (1) | US7175794B2 (de) |
EP (1) | EP1231003B1 (de) |
DE (2) | DE10106172A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012211053A1 (de) | 2012-06-27 | 2014-01-02 | Robert Bosch Gmbh | Weichmagnetische Komponente und Verfahren zur Herstellung einer solchen |
EP2842663A4 (de) * | 2012-04-23 | 2016-04-20 | Aida Eng Ltd | Vorrichtung für hochdichte formung und verfahren zur hochdichten formung von mischpulver |
EP2805404B1 (de) * | 2012-01-19 | 2019-07-03 | Libertine FPE Ltd | Lineare elektrische maschine |
AT521006A1 (de) * | 2018-01-24 | 2019-09-15 | Miba Sinter Austria Gmbh | Verfahren zum Herstellen eines Bauteils mit weichmagnetischen Eigenschaften |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE0203168D0 (sv) * | 2002-10-25 | 2002-10-25 | Hoeganaes Ab | Heat treatment of iron-based components |
JP4134111B2 (ja) * | 2005-07-01 | 2008-08-13 | 三菱製鋼株式会社 | 絶縁軟磁性金属粉末成形体の製造方法 |
DE102008059565A1 (de) * | 2008-10-17 | 2010-04-22 | Continental Teves Ag & Co. Ohg | Magnetspule, inbesondere für Elektromagnetventile |
KR101540150B1 (ko) * | 2013-05-27 | 2015-07-28 | 삼성전기주식회사 | 스위치드 릴럭턴스 모터 |
CN104923792A (zh) * | 2015-07-07 | 2015-09-23 | 北京科汇粉末冶金厂 | 电磁零件及其制备方法 |
CN110947956B (zh) * | 2019-11-21 | 2021-05-14 | 山东精创磁电产业技术研究院有限公司 | 一种高强度、高磁导率软磁复合材料成形工艺 |
IL301491A (en) * | 2020-09-21 | 2023-05-01 | Evr Motors Ltd | Electric machine with radial flux |
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WO1996002345A1 (en) * | 1994-07-18 | 1996-02-01 | Höganäs Ab | Iron powder components containing thermoplastic resin and method of making same |
EP0977216A1 (de) * | 1998-07-29 | 2000-02-02 | TDK Corporation | Ferromagnetisches Pulver für Pulverkerne,Pulverkern,und Herstellungsverfahren für Pulverkerne |
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DE3830092A1 (de) * | 1988-09-03 | 1990-03-15 | Hoechst Ag | Verfahren zur herstellung eines hochtemperatursupraleiters sowie daraus bestehende formkoerper |
JPH02141526A (ja) * | 1988-11-24 | 1990-05-30 | Ngk Insulators Ltd | 雰囲気制御システム |
DE4118988A1 (de) * | 1991-06-08 | 1992-12-10 | Hoechst Ag | Mit metallischen leitern kontaktierte massivkoerper aus keramischem hochtemperatur-supraleiter-material sowie verfahren zu ihrer herstellung |
US5268140A (en) * | 1991-10-03 | 1993-12-07 | Hoeganaes Corporation | Thermoplastic coated iron powder components and methods of making same |
DE4228519B4 (de) * | 1992-08-27 | 2006-04-27 | Vacuumschmelze Gmbh | Verfahren zur Herstellung von kunststoffgebundenen anisotropen Dauermagnetformteilen |
SE9401922D0 (sv) * | 1994-06-02 | 1994-06-02 | Hoeganaes Ab | Lubricant for metal powder compositions, metal powder composition containing th lubricant, method for making sintered products by using the lubricant, and the use of same |
WO1997035331A1 (fr) * | 1996-03-18 | 1997-09-25 | Seiko Epson Corporation | Procede de formation d'aimant a liaison de terres rares, composition dudit aimant et son procede de fabrication |
JPH1083911A (ja) * | 1996-09-06 | 1998-03-31 | Tokin Corp | 複合磁性体及びそれを用いた電磁干渉抑制体 |
US6102980A (en) * | 1997-03-31 | 2000-08-15 | Tdk Corporation | Dust core, ferromagnetic powder composition therefor, and method of making |
DE19735271C2 (de) * | 1997-08-14 | 2000-05-04 | Bosch Gmbh Robert | Weichmagnetischer, formbarer Verbundwerkstoff und Verfahren zu dessen Herstellung |
US6174453B1 (en) * | 1998-10-02 | 2001-01-16 | Tdk Corporation | High-density ferrite member and ferrite beads composition therefor |
DE19945592A1 (de) * | 1999-09-23 | 2001-04-12 | Bosch Gmbh Robert | Weichmagnetischer Werkstoff und Verfahren zu dessen Herstellung |
DE19960991C1 (de) * | 1999-12-17 | 2001-03-22 | Clariant Gmbh | Formmasse zur Herstellung pulvermetallischer oder keramischer Erzeugnisse |
-
2001
- 2001-02-10 DE DE10106172A patent/DE10106172A1/de not_active Ceased
-
2002
- 2002-01-19 EP EP02001397A patent/EP1231003B1/de not_active Expired - Lifetime
- 2002-01-19 DE DE50213306T patent/DE50213306D1/de not_active Expired - Lifetime
- 2002-02-11 US US10/074,175 patent/US7175794B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996002345A1 (en) * | 1994-07-18 | 1996-02-01 | Höganäs Ab | Iron powder components containing thermoplastic resin and method of making same |
EP0977216A1 (de) * | 1998-07-29 | 2000-02-02 | TDK Corporation | Ferromagnetisches Pulver für Pulverkerne,Pulverkern,und Herstellungsverfahren für Pulverkerne |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2805404B1 (de) * | 2012-01-19 | 2019-07-03 | Libertine FPE Ltd | Lineare elektrische maschine |
EP2842663A4 (de) * | 2012-04-23 | 2016-04-20 | Aida Eng Ltd | Vorrichtung für hochdichte formung und verfahren zur hochdichten formung von mischpulver |
DE102012211053A1 (de) | 2012-06-27 | 2014-01-02 | Robert Bosch Gmbh | Weichmagnetische Komponente und Verfahren zur Herstellung einer solchen |
WO2014000916A1 (de) | 2012-06-27 | 2014-01-03 | Robert Bosch Gmbh | Weichmagnetische komponente und verfahren zur herstellung einer solchen |
AT521006A1 (de) * | 2018-01-24 | 2019-09-15 | Miba Sinter Austria Gmbh | Verfahren zum Herstellen eines Bauteils mit weichmagnetischen Eigenschaften |
AT521006B1 (de) * | 2018-01-24 | 2021-08-15 | Miba Sinter Austria Gmbh | Verfahren zum Herstellen eines Bauteils mit weichmagnetischen Eigenschaften |
Also Published As
Publication number | Publication date |
---|---|
DE50213306D1 (de) | 2009-04-09 |
US7175794B2 (en) | 2007-02-13 |
DE10106172A1 (de) | 2002-08-29 |
EP1231003B1 (de) | 2009-02-25 |
US20020135089A1 (en) | 2002-09-26 |
EP1231003A3 (de) | 2005-07-20 |
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