GB452497A - Improvements in the treatment of iron-silicon alloys - Google Patents
Improvements in the treatment of iron-silicon alloysInfo
- Publication number
- GB452497A GB452497A GB3352234A GB3352234A GB452497A GB 452497 A GB452497 A GB 452497A GB 3352234 A GB3352234 A GB 3352234A GB 3352234 A GB3352234 A GB 3352234A GB 452497 A GB452497 A GB 452497A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alloys
- deformation
- silicon
- rings
- hours
- 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
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/78—Combined heat-treatments not provided for above
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The magnetic properties of iron silicon alloys are improved by subjecting the alloys to substantial deformation, e.g. to the extent of at least 40 per cent, in the cold or at a relatively low temperature and then annealing for a period of hours, e.g. from 4-100 hours, at 1000-1300 DEG C., in a protecting gas such as pure hydrogen. The alloys usually contain 0,5-5,0 per cent of silicon but with higher silicon contents the deformation may be effected at an elevated temperature, e.g. 100 DEG C. Intermediate annealing, e.g. at 800 DEG C. for 1/2 hour may be employed if the cold working takes place in steps. When the alloys are used in strip or bar form for the manufacture of ring cores, the strips &c. after the deformation may be built into rings of the desired shape to prevent sticking, separated by thin layers of clay, lime, &c. The rings so produced are then annealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3352234A GB452497A (en) | 1934-11-21 | 1934-11-21 | Improvements in the treatment of iron-silicon alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3352234A GB452497A (en) | 1934-11-21 | 1934-11-21 | Improvements in the treatment of iron-silicon alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB452497A true GB452497A (en) | 1935-07-05 |
Family
ID=10354043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3352234A Expired GB452497A (en) | 1934-11-21 | 1934-11-21 | Improvements in the treatment of iron-silicon alloys |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB452497A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE878808C (en) * | 1940-06-18 | 1953-06-05 | Eisen & Stahlind Ag | Use of a heat-treated iron-chromium-silicon alloy as material for objects subject to magnetic stress |
-
1934
- 1934-11-21 GB GB3352234A patent/GB452497A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE878808C (en) * | 1940-06-18 | 1953-06-05 | Eisen & Stahlind Ag | Use of a heat-treated iron-chromium-silicon alloy as material for objects subject to magnetic stress |
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