US2206537A - Magnetic metallic material containing tungsten - Google Patents
Magnetic metallic material containing tungsten Download PDFInfo
- Publication number
- US2206537A US2206537A US232797A US23279738A US2206537A US 2206537 A US2206537 A US 2206537A US 232797 A US232797 A US 232797A US 23279738 A US23279738 A US 23279738A US 2206537 A US2206537 A US 2206537A
- Authority
- US
- United States
- Prior art keywords
- tungsten
- iron
- copper
- nickel
- metallic material
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/9265—Special properties
- Y10S428/928—Magnetic property
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49075—Electromagnet, transformer or inductor including permanent magnet or core
- Y10T29/49076—From comminuted material
Definitions
- This invention relates to metallic materials containing more than 83% of tungsten, and having densities exceeding or at least not substantially less than 15 gm./ml.
- a metallic material contains more than 83% of tungsten, not less than 2% or nickel, preferably some copper, and some iron; has a density not substantially less than 15 gm./ml.; has a magnetic permeability greater than 2.
- the proportion of copper should not be much more than half the proportion of nickel present.
- the presence of copper does not materially aflect the permeability or greatly increase the density obtainable, it no Y limit is placed on the temperature or duration of the sintering; but it enables a given density to be obtained at a lower temperature and/or with a shorter duration. It is preferable therefore that at least 1% of copper should be present.
- a magnetic alloy having a density of at least 15 gm./ml. and consisthig of a pressed and sintered mixture oi tungsten, nickel, iron and copper powders having a compomtion by weight lying within the range 83 to 95% tungsten, i to 14% nickel, 2 to 14% iron and l to 13% copper.
- An alloy according to claim 1 containing 88% tungsten, 5% nickel, 2% copper and 5% iron.
- An alloy according to claim 1 containing 88% tungsten, 6% nickel, 4% copper and 2% d-nonen may s'rosa'r PRICE.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Soft Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
Description
iii
Patented July 2, 1940 UNITED smrss PATENT QFFifiE MAGNETIO METALLIC MATERIAL OGNTAIN- ING TUNGSTEN No Drawing.
3Claims.
This invention relates to metallic materials containing more than 83% of tungsten, and having densities exceeding or at least not substantially less than 15 gm./ml.
Materials, capable of being machined, containing more than 83% of tungsten together with nickel and copper are known and are valuable on account of their high density; they are usually prepared by sintering the powdered constituents together at a temperature below 1500 C. They are, however, only feebly magnetic. For certain purposes it would be an advantage if such materials had strongly magnetic properties. Ihe object of the invention is to produce materials of the kind described which, whilst having the essential characteristics of these known alloys, have also strongly magnetic properties.
I have found that the addition of a few per cent of iron to a material of the kind described confers upon it strongly magnetic properties. I.
' and the density does not approach 15. Again it is known that the addition of iron to a nonmagnetic metal will often produce a feebly magnetic alloy, whose magnetic properties can be regarded as due directly to those of the iron present. The materials produced according to the prwent invention are far more strongly magnetic than would be the case if the magnetism depended solely on the magnetism of the small proportion of iron present. Whilst the invention is in no way dependent on the theory, I believe the strongly magnetic properties are due to the formation of a phase containing nickel, tungsten and iron in solid solution. 1 1
According to the invention a metallic material contains more than 83% of tungsten, not less than 2% or nickel, preferably some copper, and some iron; has a density not substantially less than 15 gm./ml.; has a magnetic permeability greater than 2.
Twoembodimentsoftheinventionwillnow Application October 1, 1938, Serial In Great Britain October 4, 193'! be described by way of example. In the first a mixture of metal powders containing 88% tungsten, 5% nickel, 2% copper and 5% iron is pressed and sintered at a temperature of about 1450 C. so as to give a'coherent body. This rnaterial has a magnetic permeability greater than 10.
In the second mixture of metal powders containing 88% tungsten, 6% nickel, 4% copper and 2% iron is pressed and slntered in the same way. The permeability of'the resulting material is somewhat lower than the first example but still greater than 5.
If it is desired to obtain the highest possible density for a given permeability the proportion of copper should not be much more than half the proportion of nickel present. The presence of copper does not materially aflect the permeability or greatly increase the density obtainable, it no Y limit is placed on the temperature or duration of the sintering; but it enables a given density to be obtained at a lower temperature and/or with a shorter duration. It is preferable therefore that at least 1% of copper should be present.
It will thus be seen that I have provided a new composition of matter in the form of a magnetic material havinga density of at least 15 gm./ml. and consisting of a pressed and sintered mixture of tungsten, nickel, iron and copper powders having a composition by weight lying within the range 83 to 95% tungsten, 2 to 14% nickel, 2 to 14% iron and preferably 1 to 13% copper.
I claim:
1. A magnetic alloy having a density of at least 15 gm./ml. and consisthig of a pressed and sintered mixture oi tungsten, nickel, iron and copper powders having a compomtion by weight lying within the range 83 to 95% tungsten, i to 14% nickel, 2 to 14% iron and l to 13% copper.
2. An alloy according to claim 1 containing 88% tungsten, 5% nickel, 2% copper and 5% iron.
3. An alloy according to claim 1 containing 88% tungsten, 6% nickel, 4% copper and 2% d-nonen may s'rosa'r PRICE.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2206537X | 1937-10-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2206537A true US2206537A (en) | 1940-07-02 |
Family
ID=10901188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US232797A Expired - Lifetime US2206537A (en) | 1937-10-04 | 1938-10-01 | Magnetic metallic material containing tungsten |
Country Status (1)
Country | Link |
---|---|
US (1) | US2206537A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2489912A (en) * | 1941-12-13 | 1949-11-29 | Westinghouse Electric Corp | Method of producing tungsten alloys |
US2843921A (en) * | 1956-06-26 | 1958-07-22 | Mallory & Co Inc P R | High-strength high-density tungsten base alloys |
US3152931A (en) * | 1960-12-07 | 1964-10-13 | Westinghouse Electric Corp | Contactor assembly |
US3904383A (en) * | 1970-05-11 | 1975-09-09 | Mallory & Co Inc P R | Welded structure and method |
US5008071A (en) * | 1988-01-04 | 1991-04-16 | Gte Products Corporation | Method for producing improved tungsten nickel iron alloys |
-
1938
- 1938-10-01 US US232797A patent/US2206537A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2489912A (en) * | 1941-12-13 | 1949-11-29 | Westinghouse Electric Corp | Method of producing tungsten alloys |
US2843921A (en) * | 1956-06-26 | 1958-07-22 | Mallory & Co Inc P R | High-strength high-density tungsten base alloys |
US3152931A (en) * | 1960-12-07 | 1964-10-13 | Westinghouse Electric Corp | Contactor assembly |
US3904383A (en) * | 1970-05-11 | 1975-09-09 | Mallory & Co Inc P R | Welded structure and method |
US5008071A (en) * | 1988-01-04 | 1991-04-16 | Gte Products Corporation | Method for producing improved tungsten nickel iron alloys |
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