GB595510A - Improvements in or relating to the manufacture of finely divided magnetic material - Google Patents
Improvements in or relating to the manufacture of finely divided magnetic materialInfo
- Publication number
- GB595510A GB595510A GB1206445A GB1206445A GB595510A GB 595510 A GB595510 A GB 595510A GB 1206445 A GB1206445 A GB 1206445A GB 1206445 A GB1206445 A GB 1206445A GB 595510 A GB595510 A GB 595510A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ingot
- cooled
- magnetic material
- cast
- temperature
- 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
- 239000000696 magnetic material Substances 0.000 title abstract 3
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 239000000843 powder Substances 0.000 abstract 2
- 238000001953 recrystallisation Methods 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 229910001018 Cast iron Inorganic materials 0.000 abstract 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 abstract 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 abstract 1
- 238000005266 casting Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 239000006247 magnetic powder Substances 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
Abstract
595,510. Making magnetic powder. STANDARD TELEPHONES & CABLES, Ltd., and BUCKLEY, S. E. May 14, 1945, No. 12064. [Classes 83 (i) and 83 (ii)] Foundry moulds.-A process for manufacturing finely-divided magnetic material comprises melting magnetic material, adding thereto an embrittling agent and casting the molten material into ingots of such size, shape and construction that the ingots so formed are cooled so rapidly that a fine grained crystalline structure substantially free from long needle-like crystals is produced throughout the greater part of the ingot. A molten nickel-iron alloy containing an embrittling agent is cast into a mould comprising two side plates 1 of mild steel or cast iron about three feet square, pressed by clamps 3 on to a U-shaped spacing piece 2 about “ inch thick. The side plates may be water-cooled. Pouring is facilitated by a refractory tundish 4. After cooling, the cast material is broken into fragments in a hammer mill and the pieces ground to a fine powder. The fragments may be reheated to the temperature of recrystallisation and rapidly quenched in cold water from that temperature before being ground into powder. As a further alternative, the mould may be taken apart as soon as the ingot has cooled to the temperature of recrystallisation and the ingot then quenched in cold water. Specifications 564,651 and 587,138 are referred to.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB595510A true GB595510A (en) | 1947-12-08 |
Family
ID=1714845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1206445A Expired GB595510A (en) | 1945-05-14 | Improvements in or relating to the manufacture of finely divided magnetic material |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB595510A (en) |
-
1945
- 1945-05-14 GB GB1206445A patent/GB595510A/en not_active Expired
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