EP0838289B1 - Verfahren zur Herstellung massiver Magnetkörper - Google Patents
Verfahren zur Herstellung massiver Magnetkörper Download PDFInfo
- Publication number
- EP0838289B1 EP0838289B1 EP97117634A EP97117634A EP0838289B1 EP 0838289 B1 EP0838289 B1 EP 0838289B1 EP 97117634 A EP97117634 A EP 97117634A EP 97117634 A EP97117634 A EP 97117634A EP 0838289 B1 EP0838289 B1 EP 0838289B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- die
- alloy
- magnet bodies
- hydrogen
- temperature
- 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.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
Definitions
- the invention relates to a method for producing massive Magnetic body made of materials with soft magnetic Properties using the die casting process.
- the method is applicable for the production of soft magnetic Magnetic bodies for relays, transformers, solenoid valves, actuators and other electromagnetic products.
- the invention is based on the object of a method create with the massive magnetic body made of materials soft magnetic properties using the Die casting process can be produced efficiently.
- the process is characterized in that An alloy is used as the starting material Alloy components of the soft magnetic material and additionally one or more of the melting point depressants Elements consist of boron, carbon and phosphorus.
- the added additional elements in such an amount that the Melting point of the soft magnetic material to a Temperature ⁇ 1400 ° C, preferably ⁇ 1300 ° C is lowered.
- the die-cast from this alloy Magnetic bodies are then retrofitted using a Heat treatment in a reactive atmosphere the additional Elements at least partially removed.
- the die-cast magnetic body can be used for the heat treatment
- Hydrogen can be used as a reactive atmosphere. It is it is advantageous if the hydrogen atmosphere during the Heat treatment of the die-cast magnetic body continuously or is discontinuously renewed by rinsing.
- the die-cast magnetic body initially in damp hydrogen a temperature between 850 and 1000 ° C and then in dry hydrogen at a temperature between 1000 and 1250 ° C heat treated.
- the die-cast magnetic body at a temperature in the range of 870 to 950 ° C for a period of 2 to 16 hours in moist Hydrogen and finally at a temperature in the range from 1050 to 1120 ° C for a minimum of Heat treated in dry hydrogen for 1.5 hours.
- the conditions are created to high quality soft magnetic alloys effective in Die casting process to process massive magnetic bodies.
- At the Casting does not create any disruptive pores in the material. It can reusable molds are used and the The temperature of the casting melt can be lowered to such an extent that the Die casting tools have a sufficiently long service life.
- the invention is based on exemplary embodiments explained in more detail.
- Boron is added to a soft magnetic Fe 85 Si 15 alloy, which has a melting point of 1420 ° C., in such an amount that an Fe 77.5 Si 13.5 B 9 alloy is formed, the melting point of which is only 1160 ° C lies.
- Rings with an outer ring diameter of 20 mm and a material thickness of 2 x 2 mm are cast from this alloy.
- a measurement of the coercive field strength results in an H C value of> 1200 A / m.
- These rings are then subjected to heat treatment in moist hydrogen at 1000 ° C. for 8 hours and then to heat treatment in dry hydrogen at 1100 ° C. for 8 hours.
- the heat treatment reduces the boron content in the rings to ⁇ 0.1% and approximately the original Fe 85 Si 15 alloy with a coercive field strength H C of ⁇ 100 A / m is formed.
- the rings thus produced can be used as ring cores for transformers be used.
- the rods thus produced can be used as cores for relays be used.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Hard Magnetic Materials (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Magnetic Ceramics (AREA)
Description
Diese Ringe werden anschließend bei 1000 °C während einer Dauer von 8 h einer Wärmebehandlung in feuchtem Wasserstoff und anschließend bei 1100 °C während einer Dauer von 8 h einer Wärmebehandlung in trockenem Wasserstoff unterworfen. Durch die Wärmebehandlungen wird der Borgehalt in den Ringen auf < 0,1 % verringert und es entsteht annähernd die ursprüngliche Fe85Si15-Legierung mit einer Koerzitivfeldstärke HC von < 100 A/m.
Claims (5)
- Verfahren zur Herstellung massiver Magnetkörpern aus Werkstoffen mit weichmagnetischen Eigenschaften unter Anwendung des Druckgußverfahrens, wobei man als Ausgangswerkstoff eine Legierung verwendet, die aus den Legierungsbestandteilen des weichmagnetischen Werkstoffs und zusätzlich einem oder mehreren der schmelzpunkterniedrigenden Elemente Bor, Kohlenstoff und Phosphor besteht, wobei die zusätzlichen Elemente in einer solchen Menge zugesetzt sind, daß der Schmelzpunkt des weichmagnetischen Werkstoffs auf eine Temperatur < 1400 °C, vorzugsweise < 1300 °C abgesenkt wird, und daß man den aus dieser Legierung im Druckgußverfahren erzeugten Magnetkörpern nachträglich mittels einer Wärmebehandlung in einer reaktiven Atmosphäre die zusätzlichen Elemente zumindest teilweise wieder entzieht.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß für die Wärmebehandlung der Druckguß-Magnetkörper Wasserstoff als reaktive Atmosphäre verwendet wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Wasserstoffatmosphäre während der Wärmebehandlung der Druckguß-Magnetkörper kontinuierlich oder diskontinuierlich durch Spülen erneuert wird.
- Verfahren nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Druckguß-Magnetkörper zunächst in feuchtem Wasserstoff bei einer Temperatur zwischen 850 und 1000 °C und anschließend in trockenem Wasserstoff bei einer Temperatur zwischen 1000 und 1250 °C wärmebehandelt werden.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Druckguß-Magnetkörper bei einer Temperatur im Bereich von 870 bis 950 °C während einer Dauer von 2 bis 16 Stunden in feuchtem Wasserstoff und abschließend bei einer Temperatur im Bereich von 1050 bis 1120 °C während einer Dauer von mindestens 1,5 Stunden in trockenem Wasserstoff wärmebehandelt werden.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19643602A DE19643602A1 (de) | 1996-10-22 | 1996-10-22 | Verfahren zur Herstellung massiver Magnetkörper |
DE19643602 | 1996-10-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0838289A1 EP0838289A1 (de) | 1998-04-29 |
EP0838289B1 true EP0838289B1 (de) | 2002-12-18 |
Family
ID=7809469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97117634A Expired - Lifetime EP0838289B1 (de) | 1996-10-22 | 1997-10-11 | Verfahren zur Herstellung massiver Magnetkörper |
Country Status (5)
Country | Link |
---|---|
US (1) | US5932032A (de) |
EP (1) | EP0838289B1 (de) |
JP (1) | JPH10154625A (de) |
AT (1) | ATE229859T1 (de) |
DE (2) | DE19643602A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6722887B2 (ja) * | 2016-06-08 | 2020-07-15 | パナソニックIpマネジメント株式会社 | 鉄基磁性体の圧粉磁心 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB450841A (en) * | 1935-01-21 | 1936-07-21 | Birmingham Electr Furnaces Ltd | Methods or processes for the heat-treatment of iron, steel and alloy steels |
DE1182276B (de) * | 1958-11-12 | 1964-11-26 | Armco Steel Corp | Verfahren zur Herstellung von nichtalterndem Siliziumstahlblech |
DD108628A1 (de) * | 1973-09-20 | 1974-09-20 | ||
DD126155A1 (de) * | 1976-06-22 | 1977-06-22 | ||
JPS54104427A (en) * | 1978-02-06 | 1979-08-16 | Hitachi Metals Ltd | Low temperature fusion magnetic alloy |
-
1996
- 1996-10-22 DE DE19643602A patent/DE19643602A1/de not_active Withdrawn
-
1997
- 1997-10-11 AT AT97117634T patent/ATE229859T1/de not_active IP Right Cessation
- 1997-10-11 DE DE59708998T patent/DE59708998D1/de not_active Expired - Fee Related
- 1997-10-11 EP EP97117634A patent/EP0838289B1/de not_active Expired - Lifetime
- 1997-10-16 US US08/951,403 patent/US5932032A/en not_active Expired - Fee Related
- 1997-10-21 JP JP9288362A patent/JPH10154625A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE59708998D1 (de) | 2003-01-30 |
US5932032A (en) | 1999-08-03 |
JPH10154625A (ja) | 1998-06-09 |
DE19643602A1 (de) | 1998-04-23 |
EP0838289A1 (de) | 1998-04-29 |
ATE229859T1 (de) | 2003-01-15 |
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