WO1997037361A1 - Weichmagnetische nickel-eisen-legierung - Google Patents
Weichmagnetische nickel-eisen-legierung Download PDFInfo
- Publication number
- WO1997037361A1 WO1997037361A1 PCT/EP1997/001310 EP9701310W WO9737361A1 WO 1997037361 A1 WO1997037361 A1 WO 1997037361A1 EP 9701310 W EP9701310 W EP 9701310W WO 9737361 A1 WO9737361 A1 WO 9737361A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- nickel
- calcium
- alloy
- magnesium
- Prior art date
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
- H01F1/14708—Fe-Ni based alloys
Definitions
- the invention relates to soft magnetic nickel-iron alloys with very high magnetic permeability.
- Soft magnetic materials are characterized by low magnetic loss. In addition to a small coercive field strength, low magnetic reversal losses in particular require high magnetic permeabilities. In order to achieve high magnetic permeabilities, it is necessary to keep both the crystal anisotropy constant K and the magnetostriction constant ⁇ as small as possible.
- the crystal anisotropy constant in the concentration range between 57 and 75% by mass of nickel can be made to disappear using a suitable heat treatment. With 80% by mass of nickel the magnetostriction constant ⁇ ⁇ ⁇ , with 83% by mass of nickel the magnetostriction constant ⁇ 100 becomes zero.
- Non-metallic contaminants arise due to the required deoxidation treatment of the melts before casting.
- the result is finely divided non-metallic inclusions.
- these non-metallic inclusions can consist of oxides of aluminum, calcium, magnesium or other elements with an affinity for oxygen.
- soft magnetic nickel-iron alloys with nickel contents of around 80% and the highest demands on the soft magnetic properties according to the prior art have so far been produced from selected clean starting materials with the aid of vacuum melting technology, as for the examples mentioned in DE OS 39 10 147 on p. 8, line 53 and on p. 10, line 28.
- further special measures such as the addition of boron or the setting of a calcium content of 0.0007 to 0.006% in connection with a manganese content to be limited may be necessary.
- Standard steelworks technology is understood to mean melting in an open arc furnace with subsequent ladle metallurgy for deoxidation, desulfurization and degassing. The task was therefore to find a selected alloy range which, even under such extremely difficult conditions, allows the setting of very high soft magnetic properties, measured as the initial and maximum permeabilities.
- the object is achieved by a soft magnetic nickel-iron-molybdenum alloy with a magnetic initial permeability ⁇ 4 > 280,000 and a maximum magnetic permeability ⁇ max> 400,000 obtainable by deoxidizing the molten metal with aluminum and / or silicon, and limiting the magnesium content to less than 15 ppm by mass and calcium to less than 8 ppm by mass and the total magnesium + calcium to less than 20 ppm by mass.
- Chromium and copper can each contain up to 0.4 mass% and manganese up to 0.8 mass%.
- Permeability is determined (around 480 ° C), for grading the
- the alloys E1, E2 and E3 according to the invention are distinguished according to Table 2 by magnesium contents of up to 0.0008%.
- the upper limit of 0.0015% Mg for the alloy range claimed according to the invention is derived from further exemplary melts which, in the case of a calcium content in the range according to the invention with 0.0012% Mg, lead to the permeability values to be achieved according to the task, with 0, 0018% Mg and more but not, as the following table 4 shows: Table 4: Exemplary information on the levels of magnesium and calcium for the
- a further embodiment of the invention consists in that according to the table 1 either not at all or with max. 0.5 or max. 1% limited cobalt content to max. Limit 0.04%. Surprisingly, it has been found that cobalt contents higher than 0.04% make the temperature range around 480 ° C., in which the highest magnetic permeability is determined (see above), very narrow. Since certain temperature gradients cannot be avoided in industrial furnaces, this makes industrial processability very difficult.
- the width of the temperature range in which the highest magnetic permeabilities can be achieved was determined in the presence of 0.06% by mass of cobalt at 7 ° C., but in the case of a cobalt content restricted to 0.03% by mass 22 ° C.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97908240A EP0890177A1 (de) | 1996-03-29 | 1997-03-15 | Weichmagnetische nickel-eisen-legierung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1996112556 DE19612556C2 (de) | 1996-03-29 | 1996-03-29 | Verwendung einer weichmagnetischen Nickel-Eisen-Legierung |
DE19612556.1 | 1996-03-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997037361A1 true WO1997037361A1 (de) | 1997-10-09 |
Family
ID=7789862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/001310 WO1997037361A1 (de) | 1996-03-29 | 1997-03-15 | Weichmagnetische nickel-eisen-legierung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0890177A1 (de) |
DE (1) | DE19612556C2 (de) |
WO (1) | WO1997037361A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19900351A1 (de) * | 1999-01-07 | 2000-07-13 | Krupp Vdm Gmbh | Weichmagnetische Eisen-Nickel-Legierung |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4336882A1 (de) * | 1993-04-30 | 1994-11-03 | Nippon Kokan Kk | Magnetische Ni-Fe-Legierung und Verfahren zur Herstellung derselben |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0250931A (ja) * | 1988-05-13 | 1990-02-20 | Nkk Corp | 強磁性Ni―Fe系合金、および、前記合金の優れた表面性状を有するスラブまたは熱間圧延鋼帯を製造するための方法 |
-
1996
- 1996-03-29 DE DE1996112556 patent/DE19612556C2/de not_active Revoked
-
1997
- 1997-03-15 EP EP97908240A patent/EP0890177A1/de not_active Withdrawn
- 1997-03-15 WO PCT/EP1997/001310 patent/WO1997037361A1/de not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4336882A1 (de) * | 1993-04-30 | 1994-11-03 | Nippon Kokan Kk | Magnetische Ni-Fe-Legierung und Verfahren zur Herstellung derselben |
Also Published As
Publication number | Publication date |
---|---|
DE19612556A1 (de) | 1997-10-02 |
EP0890177A1 (de) | 1999-01-13 |
DE19612556C2 (de) | 2001-06-07 |
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