GB1089701A - Improvements in furnace apparatus and method for heat treating silicon steel strip - Google Patents
Improvements in furnace apparatus and method for heat treating silicon steel stripInfo
- Publication number
- GB1089701A GB1089701A GB78/66A GB7866A GB1089701A GB 1089701 A GB1089701 A GB 1089701A GB 78/66 A GB78/66 A GB 78/66A GB 7866 A GB7866 A GB 7866A GB 1089701 A GB1089701 A GB 1089701A
- Authority
- GB
- United Kingdom
- Prior art keywords
- turn
- furnace
- silicon steel
- heating
- reeling
- 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
- 238000010438 heat treatment Methods 0.000 abstract 3
- 229910000831 Steel Inorganic materials 0.000 abstract 2
- 239000010959 steel Substances 0.000 abstract 2
- 238000000137 annealing Methods 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 238000001953 recrystallisation Methods 0.000 abstract 1
- 229910052710 silicon Inorganic materials 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/68—Furnace coilers; Hot coilers
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/28—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity for treating continuous lengths of work
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
<PICT:1089701/C6-C7/1> Silicon steel sheet or strip e.g. containing 1-4% Si is heat treated by pre-heating it, e.g. moving a strand 9 of the steel from a coil 6 held on turn-table 4 in an entrance housing 1, through an elongated pre-heating furnace A, to above 900 DEG C. without subjecting it to the temperature range 800-900 DEG C. for more than 10 minutes, and then annealing it, e.g. in coiled form reeled on to spindle 22 on platform 23 carried by turn-table 24 in a bell furnace B, in two stages: first at 950 to 1050 DEG C. for at least 1 hour (for yielding optimum grain growth) and second at 1100 to 1200 DEG C. for a least 1 hour (for purification e.g. removing S during secondary recrystallization). Furnaces A and B fitted with heating elements 13, 30 may be removably connected to each other e.g. at housings 32 and 31 sealed by a gasket 33. The reeling may be started by a switch 29 which starts a drive train (not shown) which synchronously drives vertical rollers 7, 12 and 21 (by motor 35) and turn-table motors 4a and 25. The furnaces are preferably purged with N2 and then filled with H2 prior to reeling. The annealed coiled steel may be also cooled in H2 e.g. to 500 DEG C. within the furnace B.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US424081A US3409480A (en) | 1965-01-07 | 1965-01-07 | Method of heat treating silicon steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1089701A true GB1089701A (en) | 1967-11-08 |
Family
ID=23681370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB78/66A Expired GB1089701A (en) | 1965-01-07 | 1966-01-03 | Improvements in furnace apparatus and method for heat treating silicon steel strip |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US3409480A (en) |
| FR (1) | FR1462911A (en) |
| GB (1) | GB1089701A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3704872A (en) * | 1968-08-21 | 1972-12-05 | Mallory & Co Inc P R | Sintering furnace |
| JPS53129116A (en) * | 1977-04-18 | 1978-11-10 | Nippon Steel Corp | Oriented electromagnetic steel sheet with excellent magnetic characteristic s |
| US4619717A (en) * | 1984-04-23 | 1986-10-28 | Park-Ohio Industries, Inc. | Heating magnetic metal workpieces |
| IT1260566B (en) * | 1992-06-30 | 1996-04-16 | Danieli Off Mecc | WRAPPING-UNWINDING UNIT FOR THIN SLABS |
| WO2007113929A1 (en) * | 2006-04-04 | 2007-10-11 | Nippon Steel Corporation | Hearth carriage connection structure for rotary hearth furnace |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1646498A (en) * | 1925-12-29 | 1927-10-25 | Gen Electric | Electric heating |
| US2169314A (en) * | 1938-01-03 | 1939-08-15 | Lee Wilson Sales Corp | Method and apparatus for annealing strip |
| US2441500A (en) * | 1944-03-30 | 1948-05-11 | Miess Fred | Electrically heating continuously traveling metal strip |
| SE170138C1 (en) * | 1956-03-29 | 1960-01-19 | ||
| US2986485A (en) * | 1958-07-28 | 1961-05-30 | Gen Electric | Annealing process for magnetic steel strip |
| US2965526A (en) * | 1958-10-03 | 1960-12-20 | Westinghouse Electric Corp | Method of heat treating silicon steel |
-
1965
- 1965-01-07 US US424081A patent/US3409480A/en not_active Expired - Lifetime
-
1966
- 1966-01-03 GB GB78/66A patent/GB1089701A/en not_active Expired
- 1966-01-06 FR FR45044A patent/FR1462911A/en not_active Expired
-
1968
- 1968-05-13 US US752085*A patent/US3501135A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US3409480A (en) | 1968-11-05 |
| FR1462911A (en) | 1966-12-16 |
| US3501135A (en) | 1970-03-17 |
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