US1552769A - Magnetic alloy - Google Patents
Magnetic alloy Download PDFInfo
- Publication number
- US1552769A US1552769A US685432A US68543224A US1552769A US 1552769 A US1552769 A US 1552769A US 685432 A US685432 A US 685432A US 68543224 A US68543224 A US 68543224A US 1552769 A US1552769 A US 1552769A
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- US
- United States
- Prior art keywords
- alloy
- iron
- copper
- nickel
- manganese
- 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
- C22C19/002—Alloys based on nickel or cobalt with copper as the next major constituent
Definitions
- This invention relates to the production of alloys possessing a high magnetic per-- nieability especially at low magnetizing forces.
- a fourth element which may be tungsten, chromium, silicon, vanadium, titanium, molybdenum or aluminium; the amount of this fourth element ,is small compared to a the amount of copper and is preferably less than 1%, since'the addition of more than 1% of this fourth element, though increas- 10, 1924.
- These alloys are sensitive to heat-treatment and should be annealed by heating to a considerable temperature and then cooled. This may conveniently be done by passing a Wire or tape formed of the alloy through a tube heated electrically and allowing the wire or tape to cool rapidly as it issues from the tube.
- the annealing maybe adjusted to give either (a; Maximum initial permeability, or
- the alloys when correctly annealed for high initial. permeability, the alloys have iron 25%,
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
Description
Patented Sept. 8, 1925.
' WILLOUGHBY STATHAM SMITH, OF NE GARNETT, or snvnnonxs, ENGLAND.
WTON POPIPLEFORD, AND HENRY JOSEPH MAGNETIC ALLOY.
No Drawing. Application filed January T 0 all whom it may concern:
Be it known that we, IVILLOUGIIBY STAT- HAM SM1'rn,'a subject of the King of Great Britain, residing at Benchams, Newton Poppleford, Devonshire, England, and HENRY JosErH GARNETT, a subject of the King of Great Britain, residing at Lymne, Solefields, Sevenoaks, Kent, England, have invented a new and useful Improvement in Magnetic Alloys, of which the following is a specification.
This invention relates to the production of alloys possessing a high magnetic per-- nieability especially at low magnetizing forces.
It is well known that it is desirable to add inductance to telegraphic and telephonic c-a bles and this has before been done by Wrapping around the core of the cable an iron tape or Wire.
Many research workers have been investigating the properties of various alloys, especially those ofonickel and iron, with a view to discovering an allo that should be suitable for this urpose. 11 our researches we have found t at an alloy may be made of nickel, copper and iron, which has a low hysteresis loss with a very high permeability at low magnetizing forces such as those plresent in telegraphic and telephonic ca- According to our invention we make an alloy of nickel, iron, copper and manganese, the nickel being at least 71%, the iron about 20% and the copper about 5% with a small quantity of manganese to render the alloy more easy to forge.
In some cases, however, we may employ 15% to 25% copper with 49% to 71% nickel,
17% to'25% iron and manganese as before.
In order also to increase the electrical re sistance of the alloy We preferably add to it a fourth element which may be tungsten, chromium, silicon, vanadium, titanium, molybdenum or aluminium; the amount of this fourth element ,is small compared to a the amount of copper and is preferably less than 1%, since'the addition of more than 1% of this fourth element, though increas- 10, 1924. Serial No. 685,432.
The followin are exam ales of allo s made L in accordance with out invent-ion:-
has an initial magnetic permeability of .3200.
An alloy consisting of 1 Per cent.
Nickel 49.5 Iron 25.0 Copper 25.0 Manganese 0.5
lltS an initial magnetic permeability of l 00. 5
These alloys are sensitive to heat-treatment and should be annealed by heating to a considerable temperature and then cooled. This may conveniently be done by passing a Wire or tape formed of the alloy through a tube heated electrically and allowing the wire or tape to cool rapidly as it issues from the tube.
If the correct temperature has not been used the magnetic properties will not be fully developed.
Exam 1e Alloy o. 1 when heated to 890 C. and cooled in air has a permeability. of 5300, but when heated to 730 C. only 3800.
Further, the annealing maybe adjusted to give either (a; Maximum initial permeability, or
(1) Maximum permeability at magnetic saturation, and
(a) Low or highfields for magnetic saturation.
Moreover, when correctly annealed for high initial. permeability, the alloys have iron 25%,
low hysteresis losses rarying from 50 to 150 ergs per cubic centimetre with a maximum field of .25 C. G
What we 01 1 Analloy 71%, iron 17% to 25%,' and. copper 2. An alloy. consisting ofnickel 49.5%,
copper 25% 11 alloy consisting ofnickel 65.5%, I iron 17 copper 17% and manganese .5%.
and manganese .5
"4. An alloy consisting of nickel 49% to 71%, iron 17% to 25%,"c0pper 15% to 25% and a-small 5. An allo 71%, iron 17% to 25%, copper 15% and a small tungsten.
quantity of manganese.
y comprising nickel 49%" to to 25%, quantity of manganese and comprising nickel 49% to 6. An alloy comprising nickel 49% to 71%, iron 17% and tungsten.
.7. An alloy comprising nickel 49% to copper 15% to 25% adapted to increase of the alloy.
element adapted to. increase. the electrical resistance of the alloy.
In testimony that we claim the foregoing as our invention we have signed our name this 14th day of December, 1923.
WILLOUGHBY STATHAM SMITH. RY JOSEPH GARNETT.
to 25%, copper 15% to 25%
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US685432A US1552769A (en) | 1924-01-10 | 1924-01-10 | Magnetic alloy |
| US27594A US1622008A (en) | 1924-01-10 | 1925-05-02 | Magnetic alloy |
| US27593A US1582353A (en) | 1924-01-10 | 1925-05-02 | Magnetic alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US685432A US1552769A (en) | 1924-01-10 | 1924-01-10 | Magnetic alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1552769A true US1552769A (en) | 1925-09-08 |
Family
ID=24752184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US685432A Expired - Lifetime US1552769A (en) | 1924-01-10 | 1924-01-10 | Magnetic alloy |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1552769A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3657025A (en) * | 1968-04-11 | 1972-04-18 | Vacuumschmelze Gmbh | Nickel-iron base magnetic material with high initial permeability at low temperatures |
| US4490437A (en) * | 1982-09-20 | 1984-12-25 | Gte Products Corporation | Ductile nickel based brazing alloy foil |
-
1924
- 1924-01-10 US US685432A patent/US1552769A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3657025A (en) * | 1968-04-11 | 1972-04-18 | Vacuumschmelze Gmbh | Nickel-iron base magnetic material with high initial permeability at low temperatures |
| US4490437A (en) * | 1982-09-20 | 1984-12-25 | Gte Products Corporation | Ductile nickel based brazing alloy foil |
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