GB480235A - Improvements in and relating to magnetic sheet material and methods of manufacturing the same - Google Patents
Improvements in and relating to magnetic sheet material and methods of manufacturing the sameInfo
- Publication number
- GB480235A GB480235A GB23072/37A GB2307237A GB480235A GB 480235 A GB480235 A GB 480235A GB 23072/37 A GB23072/37 A GB 23072/37A GB 2307237 A GB2307237 A GB 2307237A GB 480235 A GB480235 A GB 480235A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- sheets
- rolling
- ingot
- aug
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1205—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving particular fabrication steps or treatments of ingots or slabs
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties characterised by the working steps
- C21D8/1222—Hot rolling
-
- 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
- Y10S29/00—Metal working
- Y10S29/028—Magnetic recording digest
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
480,235. Cores for dynamo-electric machines. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 23, 1937, No. 23072. Convention date, Aug. 24, 1936. Drawings to Specification. [Classes 35 and 38 (ii)] [Also in Group XXII] Sheets for transformer cores, dynamos, &c. are made from steel containing more than 5 per cent and not more than 7 per cent silicon, by casting an ingot, transferring it, while several hundred degrees above room temperature, e.g. 600‹ C., to a furnace and heating (or soaking it for about 4-6 hours) to 1200 to 1300‹ C. and rolling first into bars with reheating for 4-6 hours at 1000 to 1100‹ C. and then rolling into sheets which are doubled and interleaved with softer sheets, e.g. of mild steel containing 3 per cent selenium and heated to not less than 325‹ C., and pack rolled to within a predetermined percentage, 12 per cent, of the final thickness and then finishing by rolling at a lower temperature, e.g. about 850-900‹ C. or, to within 8 per cent of the final thickness and finish rolling at 700 to 760‹ C. The ingot may be transferred to the furnace as soon as it has become solid. The pack of sheets are sheared and separated immediately after the final pass preferably at 200‹ C. or before it drops to 95‹C. A sheet so made and containing from 6 to 6À5 per cent silicon is said to result in minimum noise when used for transformer cores. Specification 380,387, [Group XXII], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US97678A US2088440A (en) | 1936-08-24 | 1936-08-24 | Magnetic sheet steel and process for making the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB480235A true GB480235A (en) | 1938-02-18 |
Family
ID=22264598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23072/37A Expired GB480235A (en) | 1936-08-24 | 1937-08-23 | Improvements in and relating to magnetic sheet material and methods of manufacturing the same |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2088440A (en) |
| GB (1) | GB480235A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2497901A (en) * | 1944-08-18 | 1950-02-21 | Bell Telephone Labor Inc | Magnetostrictive transmitter |
| US2867557A (en) * | 1956-08-02 | 1959-01-06 | Allegheny Ludlum Steel | Method of producing silicon steel strip |
| DE2024525B1 (en) * | 1970-05-11 | 1971-12-30 | Mannesmann Ag | Process for the production of intermediate products from iron-silicon alloys with 4.5 to 7.5% by weight silicon, which are sufficiently ductile for cold working |
| JPS57145963A (en) * | 1981-03-04 | 1982-09-09 | Hitachi Metals Ltd | Material for magnetic head and its manufacture |
| JPS62103321A (en) * | 1985-06-14 | 1987-05-13 | Nippon Kokan Kk <Nkk> | Manufacture of silicon steel sheet having superior soft magnetic characteristic |
| JPH07115041B2 (en) * | 1987-03-11 | 1995-12-13 | 日本鋼管株式会社 | Method for manufacturing non-oriented high Si steel sheet |
| US5371486A (en) * | 1990-09-07 | 1994-12-06 | Kabushiki Kaisha Toshiba | Transformer core |
-
1936
- 1936-08-24 US US97678A patent/US2088440A/en not_active Expired - Lifetime
-
1937
- 1937-08-23 GB GB23072/37A patent/GB480235A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2088440A (en) | 1937-07-27 |
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