JPS5591929A - Method and facility for continuous annealing of cold rolled steel strip - Google Patents
Method and facility for continuous annealing of cold rolled steel stripInfo
- Publication number
- JPS5591929A JPS5591929A JP16280878A JP16280878A JPS5591929A JP S5591929 A JPS5591929 A JP S5591929A JP 16280878 A JP16280878 A JP 16280878A JP 16280878 A JP16280878 A JP 16280878A JP S5591929 A JPS5591929 A JP S5591929A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- zone
- strip
- steel strip
- overaging
- 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 Sheet Steel (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
PURPOSE:To manufacture the steel strip having a least strain aging propety even if quenching after overaging treatment, by carring out the overaging treatment in two specific steps, at the time of carrying out continuous annealing of low carbon cold rolled steel strip. CONSTITUTION:Low carbon cold rolled steel strip uncoiled from the payoff reel 1, heated higher than the recrystallization temperature at the heating zone 6 of continuous annealing furnace. The above strip is cooled to 500 deg.C or less at the cooling zone 8 by the gas jet cleaning process after heating uniformly in the soaking zone 7 and next, is kept at 350-500 deg.C for twenty seconds in the primary overaging zone 9. Then, the strip is cooled to 50 deg.C or less at the cooling speed of 50 deg.C or less at the cooling speed of 50 deg.C/sec. or more in the cooling part 11 after cooling slowly to 250- 330 deg.C at the cooling speed of 2-10 deg.C/sec. in the secondary overaging zone 10 and carrying out the secondary overaging treatment. The above cooling is carried out by a spray of cold water or dipping in cold water and oxidation of the strip surface is prevented and also, rising of atmosphere dew point of the zone 10 is prevented. Lastly, the strip having the same low aging property and mechanical property as usual slow cooling, is manufactured passing through the skin-pass roller 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53162808A JPS5813611B2 (en) | 1978-12-29 | 1978-12-29 | Continuous annealing method and equipment for cold rolled steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53162808A JPS5813611B2 (en) | 1978-12-29 | 1978-12-29 | Continuous annealing method and equipment for cold rolled steel strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5591929A true JPS5591929A (en) | 1980-07-11 |
| JPS5813611B2 JPS5813611B2 (en) | 1983-03-15 |
Family
ID=15761606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53162808A Expired JPS5813611B2 (en) | 1978-12-29 | 1978-12-29 | Continuous annealing method and equipment for cold rolled steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5813611B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5613438A (en) * | 1979-07-13 | 1981-02-09 | Kawasaki Steel Corp | Preparation of cold rolled steel sheet for reduction of area having superior aging resistance by continuous annealing |
| US4443272A (en) * | 1981-09-19 | 1984-04-17 | Nippon Steel Corporation | Process for producing cold rolled steel sheets having excellent press formability and ageing property |
| KR100814610B1 (en) | 2006-12-30 | 2008-03-18 | 현대하이스코 주식회사 | Manufacturing process for structural, high-tensile galvanized steel sheet |
| CN113549736A (en) * | 2021-06-22 | 2021-10-26 | 鞍钢蒂森克虏伯（重庆）汽车钢有限公司 | Technological method for stably controlling bake-hardening steel BH2 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4953116A (en) * | 1972-09-26 | 1974-05-23 | ||
| JPS53108013A (en) * | 1977-03-03 | 1978-09-20 | Nippon Kokan Kk <Nkk> | Cooling method for steel sheet at continuous anneallng |
| JPS53132418A (en) * | 1977-04-26 | 1978-11-18 | Nippon Kokan Kk <Nkk> | Continuous treating equipment including overaging treatment zone |
-
1978
- 1978-12-29 JP JP53162808A patent/JPS5813611B2/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4953116A (en) * | 1972-09-26 | 1974-05-23 | ||
| JPS53108013A (en) * | 1977-03-03 | 1978-09-20 | Nippon Kokan Kk <Nkk> | Cooling method for steel sheet at continuous anneallng |
| JPS53132418A (en) * | 1977-04-26 | 1978-11-18 | Nippon Kokan Kk <Nkk> | Continuous treating equipment including overaging treatment zone |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5613438A (en) * | 1979-07-13 | 1981-02-09 | Kawasaki Steel Corp | Preparation of cold rolled steel sheet for reduction of area having superior aging resistance by continuous annealing |
| JPS5839890B2 (en) * | 1979-07-13 | 1983-09-02 | 川崎製鉄株式会社 | Method for producing cold-rolled steel sheets for drawing with excellent aging resistance through continuous annealing |
| US4443272A (en) * | 1981-09-19 | 1984-04-17 | Nippon Steel Corporation | Process for producing cold rolled steel sheets having excellent press formability and ageing property |
| US4981531A (en) * | 1981-09-19 | 1991-01-01 | Nippon Steel Corporation | Process for producing cold rolled steel sheets having excellent press formability and ageing property |
| KR100814610B1 (en) | 2006-12-30 | 2008-03-18 | 현대하이스코 주식회사 | Manufacturing process for structural, high-tensile galvanized steel sheet |
| CN113549736A (en) * | 2021-06-22 | 2021-10-26 | 鞍钢蒂森克虏伯（重庆）汽车钢有限公司 | Technological method for stably controlling bake-hardening steel BH2 |
| CN113549736B (en) * | 2021-06-22 | 2023-01-03 | 鞍钢蒂森克虏伯（重庆）汽车钢有限公司 | Technological method for stably controlling baking hardening steel BH2 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5813611B2 (en) | 1983-03-15 |
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