US1772771A - Magnetic alloy - Google Patents
Magnetic alloy Download PDFInfo
- Publication number
- US1772771A US1772771A US275955A US27595528A US1772771A US 1772771 A US1772771 A US 1772771A US 275955 A US275955 A US 275955A US 27595528 A US27595528 A US 27595528A US 1772771 A US1772771 A US 1772771A
- Authority
- US
- United States
- Prior art keywords
- alloys
- magnetic
- magnetic alloy
- alloy
- permeability
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/007—Alloys based on nickel or cobalt with a light metal (alkali metal Li, Na, K, Rb, Cs; earth alkali metal Be, Mg, Ca, Sr, Ba, Al Ga, Ge, Ti) or B, Si, Zr, Hf, Sc, Y, lanthanides, actinides, as the next major constituent
Definitions
- Our invention relates to improvements in magnetic alloys, and its object is to produce a material the properties of which make it especially useful for the cores of transformers, Pupin or loading coils and the like, as well as a wrapping for conductors in order to increase their inductivity.
- Magnetic alloys are already known which contain nickel and iron and show a high magnetic permeability at low magnetizing forces. It has been ascertained that the favorable magnetic properties of these alloys depend to a large extent upon the purity of the constituents employed.
- Alloys of this kind are very brittle and may therefore be easily pulverized. They have further a very high initial permeability and great magnetic stability as compared with other similar alloys known in the art. In particular in conductors equipped with coils having magnet cores of such alloys, the conditions are not noticeably varied by accidental magnetizations.
- the most favorable magnetic properties of the alloys according to our invention develop after a suitable heat treatment, as in the case of the known alloys.
- our allo s are preferably annealed for a considera 1e time, say one hour at about 900 C. and then allowed to cool down slowly say about 15 to 20 minutes, to aboutv 625 The alloyis maintained at this temperature for 15-to 30 minutes, and is then cooled suddenly down to the room temperature, preferably in contact with air.
- a magnetic alloy of high permeability at low magnetizing forces containing 5 to 20% of silicon, 15 to 28% of iron and a balance of another element of the ferrous group.
Description
Patented Aug.. 12, 1930 UNITED STATES PATENT OFFICE BRUNO FETKENHEUER, OF IBEBLIN-BEINICKENZDORF, AND HANS .NEUMANN, OF BERLIN, GERMANY, ASSIGNORS TO SIEMENS & HALSKE AKTIENGESELLSGHAFT, OF SIEMENSSTADT, NEAR BERLIN, A CORPORATION OF GERMANY maonnrrc Armor No Drawing. Application filed May 7, 1928, Serial No. 275,955, and in Germany May 20, 1927.
Our invention relates to improvements in magnetic alloys, and its object is to produce a material the properties of which make it especially useful for the cores of transformers, Pupin or loading coils and the like, as well as a wrapping for conductors in order to increase their inductivity.
Magnetic alloys are already known which contain nickel and iron and show a high magnetic permeability at low magnetizing forces. It has been ascertained that the favorable magnetic properties of these alloys depend to a large extent upon the purity of the constituents employed.
It is, furthermore, generally necessary to produce these alloys in a vacuum furnace.
We have ascertained that by means of tech nically pure materials an alloy of good magnetic properties may be manufactured, by adding according to our invention about 5 to 20% of silicon to the alloy. An alloy which contains about 78% of nickel, 17% of iron and 5% of silicon has proved particularly useful. In all cases the nickel may entirely or partly be replaced by cobalt.
Alloys of this kind are very brittle and may therefore be easily pulverized. They have further a very high initial permeability and great magnetic stability as compared with other similar alloys known in the art. In particular in conductors equipped with coils having magnet cores of such alloys, the conditions are not noticeably varied by accidental magnetizations.
The most favorable magnetic properties of the alloys according to our invention develop after a suitable heat treatment, as in the case of the known alloys. For developing a high permeability our allo s arepreferably annealed for a considera 1e time, say one hour at about 900 C. and then allowed to cool down slowly say about 15 to 20 minutes, to aboutv 625 The alloyis maintained at this temperature for 15-to 30 minutes, and is then cooled suddenly down to the room temperature, preferably in contact with air.
. Various modifications and changesmay be made without departing from the spirit and the scope 'of the invention, and we desired, therefore, that only such limitations shall be placed thereon as are imposed by the prior art.
We clalm as our invention:
1. A magnetic alloy of high permeability at low magnetizing forces, containing 5 to 20% of silicon, 15 to 28% of iron and a balance of another element of the ferrous group.
2. A magnetic alloy of high permeability tures.
BRUNO FETKENHEUER. HANS NEUMANN.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1772771X | 1927-05-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1772771A true US1772771A (en) | 1930-08-12 |
Family
ID=7742638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US275955A Expired - Lifetime US1772771A (en) | 1927-05-20 | 1928-05-07 | Magnetic alloy |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1772771A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2576679A (en) * | 1939-08-02 | 1951-11-27 | Electro Chimie Metal | Permanent magnet and method of manufacture thereof |
-
1928
- 1928-05-07 US US275955A patent/US1772771A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2576679A (en) * | 1939-08-02 | 1951-11-27 | Electro Chimie Metal | Permanent magnet and method of manufacture thereof |
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