GB954165A - Method of annealing and decarburising electrical steel - Google Patents
Method of annealing and decarburising electrical steelInfo
- Publication number
- GB954165A GB954165A GB46756/62A GB4675662A GB954165A GB 954165 A GB954165 A GB 954165A GB 46756/62 A GB46756/62 A GB 46756/62A GB 4675662 A GB4675662 A GB 4675662A GB 954165 A GB954165 A GB 954165A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrical steel
- annealing
- decarburising
- cooling
- oxidizing atmosphere
- 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
- 229910000976 Electrical steel Inorganic materials 0.000 title abstract 2
- 238000000137 annealing Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 230000001590 oxidative effect Effects 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000005261 decarburization Methods 0.000 abstract 1
- 238000003475 lamination Methods 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1255—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest with diffusion of elements, e.g. decarburising, nitriding
-
- 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
- C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
- C21D3/02—Extraction of non-metals
- C21D3/04—Decarburising
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Scale-free electrical steel laminations containing 0-4.5% silicon are treated by (a) heating in an oxidizing atmosphere, e.g. one containing water vapour and having a dewpoint of 100 DEG C. at a suitable temperature, e.g. 200-600 DEG C. to produce an oxide film, (b) heating further to an annealing temperature, which may be 700-900 DEG C., in an inert atmosphere, e.g. nitrogen, to cause decarburization and to develop the desired magnetic properties, (c) cooling, (d) applying an insulating coating. The latter may be brought about by interrupting the cooling at a suitable temperature, e.g. 200-500 DEG C., and holding the steel in an oxidizing atmosphere. The process may be continuous or batchwise.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU13482/62A AU256540B2 (en) | 1962-01-19 | Method of annealing electrical steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB954165A true GB954165A (en) | 1964-04-02 |
Family
ID=3703782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB46756/62A Expired GB954165A (en) | 1962-01-19 | 1962-12-11 | Method of annealing and decarburising electrical steel |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3201294A (en) |
| BE (1) | BE626475A (en) |
| GB (1) | GB954165A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59222525A (en) * | 1983-05-31 | 1984-12-14 | Nippon Steel Corp | Method for annealing iron core material for electric apparatus |
| US6221501B1 (en) * | 1999-08-17 | 2001-04-24 | Ltv Steel Company, Inc. | Steel with electrically insulating hematite layer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1842162A (en) * | 1929-02-11 | 1932-01-19 | American Rolling Mill Co | Treating silicon steel |
| US2158065A (en) * | 1935-01-09 | 1939-05-16 | American Rolling Mill Co | Art of producing magnetic materials |
| US2227156A (en) * | 1938-09-20 | 1940-12-31 | Gen Electric | Treatment of electrical apparatus |
| US2264859A (en) * | 1939-02-23 | 1941-12-02 | Gen Electric | Annealing silicon steel strip |
| US2303343A (en) * | 1941-01-14 | 1942-12-01 | Carnegie Illinois Steel Corp | Silicon steel electrical strip |
| US2875113A (en) * | 1957-11-15 | 1959-02-24 | Gen Electric | Method of decarburizing silicon steel in a wet inert gas atmosphere |
-
0
- BE BE626475D patent/BE626475A/xx unknown
-
1962
- 1962-12-11 GB GB46756/62A patent/GB954165A/en not_active Expired
-
1963
- 1963-01-16 US US251719A patent/US3201294A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US3201294A (en) | 1965-08-17 |
| BE626475A (en) |
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