GB625627A - Improvements in or relating to magnetisable divided bodies or compacts - Google Patents
Improvements in or relating to magnetisable divided bodies or compactsInfo
- Publication number
- GB625627A GB625627A GB21337/47A GB2133747A GB625627A GB 625627 A GB625627 A GB 625627A GB 21337/47 A GB21337/47 A GB 21337/47A GB 2133747 A GB2133747 A GB 2133747A GB 625627 A GB625627 A GB 625627A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flakes
- given
- shoot
- wax
- compressed
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- 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
- H01F1/20—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 in the form of particles, e.g. powder
- H01F1/22—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 in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/24—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 in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
- Soft Magnetic Materials (AREA)
Abstract
625,627. Making magnetizable bodies. GAUT, G. C., MOORE, N. C., and PLESSEY CO., Ltd. Aug. 6, 1947, No. 21337. Drawings to Specification. [Class 83 (iv)] [Also in Group XXXV] A magnetizable body is formed by compressing together face-to-face, flakes of ferromagnetic material which thereby cohere whether or not a binder is present. Such a body may be used as a core for power or audiofrequency chokes and transformers. A ferromagnetic powder, e.g. of oxide, electrolyticsilicon-, or nickel-iron, of appropriate size selected by screening, is dropped from a hopper on to a vibratory or other feed-shoot which feeds it through rollers by which it is flattened into flakes. The flakes may be annealed and re-rolled several times. A final anneal at 900 C..for one to two hours in cracked ammonia or hydrogen is given after mixing the flakes with silica, fused magnesia, zirconia, alumina, thoria or kaolin which prevent sintering together of the flakes, and is fed to mixing conveyer by another shoot. After annealing, the magnetic flakes are separated from the other material in a magnetic separator or a weight classifier, given an oxide coating at 200-250 C. in air, and compressed at 15-30 tons/sq. inch in the manner described in Specification 589,863. Before compression a lubricant such as stearic acid in ether may be added. The compressed body may be impregnated with wax or a synthetic resin; e.g. chlorinated naphthalene wax at 150-160 C. and varnished, e.g. with phenol formaldehyde type varnish.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB21337/47A GB625627A (en) | 1947-08-06 | 1947-08-06 | Improvements in or relating to magnetisable divided bodies or compacts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB21337/47A GB625627A (en) | 1947-08-06 | 1947-08-06 | Improvements in or relating to magnetisable divided bodies or compacts |
Publications (1)
Publication Number | Publication Date |
---|---|
GB625627A true GB625627A (en) | 1949-06-30 |
Family
ID=10161172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21337/47A Expired GB625627A (en) | 1947-08-06 | 1947-08-06 | Improvements in or relating to magnetisable divided bodies or compacts |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB625627A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2864734A (en) * | 1958-12-16 | Magnetic flake core and method of | ||
US2873225A (en) * | 1957-05-20 | 1959-02-10 | Adams Edmond | Magnetic flake core |
JPS4827116B1 (en) * | 1969-09-12 | 1973-08-18 | ||
CN109351962A (en) * | 2018-11-30 | 2019-02-19 | 蓬莱市超硬复合材料有限公司 | A kind of production technology preparing hard alloy roll mixture using paraffin |
-
1947
- 1947-08-06 GB GB21337/47A patent/GB625627A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2864734A (en) * | 1958-12-16 | Magnetic flake core and method of | ||
US2873225A (en) * | 1957-05-20 | 1959-02-10 | Adams Edmond | Magnetic flake core |
JPS4827116B1 (en) * | 1969-09-12 | 1973-08-18 | ||
CN109351962A (en) * | 2018-11-30 | 2019-02-19 | 蓬莱市超硬复合材料有限公司 | A kind of production technology preparing hard alloy roll mixture using paraffin |
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