JPS5591930A - Method and apparatus for continuous annealing of cold rolled steel strip - Google Patents
Method and apparatus for continuous annealing of cold rolled steel stripInfo
- Publication number
- JPS5591930A JPS5591930A JP16280978A JP16280978A JPS5591930A JP S5591930 A JPS5591930 A JP S5591930A JP 16280978 A JP16280978 A JP 16280978A JP 16280978 A JP16280978 A JP 16280978A JP S5591930 A JPS5591930 A JP S5591930A
- Authority
- JP
- Japan
- Prior art keywords
- zone
- cooling
- strip
- cooled
- steel strip
- 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.)
- Granted
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
- 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
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)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE:To manufacture the steel strip not lowering the mechanical property and aging property even if cooled by water to a possible temperature of refining, by decreasing solid solution C carrying out overaging treatment in two steps and also, decreasing solid solution N by water cooling after that, at the time of carrying out continuous annealing of low carbon cold rolled steel strip. CONSTITUTION:Cold rolled steel strip uncoiled from the payoff reel 1, is heated at recrystallization temperature or more in the heating zone 6 of continuous annealing apparatus. The above strip is cooled to 500 deg.C or less at the cooling zone 8 after heating uniformly at the soaking zone 7 and next, is kept at 350-500 deg.C for twenty seconds in the primary overaging zone 9. Then, the secondary overaging treatment is carried out cooling slowly to 250-350 deg.C at the cooling speed of 2-10 deg.C/sec. in the secondary overaging zone 10. Next, the strip is cooled to 150-70 deg.C at the cooling speed of 50 deg.C/sec. or more by water spray or dipping etc. in the primary cooling zone 11. The strip is cooled to 50 deg.C or less at the cooling speed of 50 deg.C/sec. or more after keeping at the above temperature in five seconds or more and moreover, skin-pass rolling is carried out. Oxidation of the strip is prevented at the time of cooling by water and also, invasion of generated steam to the zone 10, is prevented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16280978A JPS5591930A (en) | 1978-12-29 | 1978-12-29 | Method and apparatus for continuous annealing of cold rolled steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16280978A JPS5591930A (en) | 1978-12-29 | 1978-12-29 | Method and apparatus for continuous annealing of cold rolled steel strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5591930A true JPS5591930A (en) | 1980-07-11 |
| JPS5756532B2 JPS5756532B2 (en) | 1982-11-30 |
Family
ID=15761626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16280978A Granted JPS5591930A (en) | 1978-12-29 | 1978-12-29 | Method and apparatus for continuous annealing of cold rolled steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5591930A (en) |
-
1978
- 1978-12-29 JP JP16280978A patent/JPS5591930A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5756532B2 (en) | 1982-11-30 |
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