JPS57198218A - Cooling method for continuously annealed steel strip - Google Patents
Cooling method for continuously annealed steel stripInfo
- Publication number
- JPS57198218A JPS57198218A JP8094481A JP8094481A JPS57198218A JP S57198218 A JPS57198218 A JP S57198218A JP 8094481 A JP8094481 A JP 8094481A JP 8094481 A JP8094481 A JP 8094481A JP S57198218 A JPS57198218 A JP S57198218A
- Authority
- JP
- Japan
- Prior art keywords
- zone
- cooling
- strip
- water
- cooled
- 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.)
- Pending
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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/60—Aqueous agents
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)
Abstract
PURPOSE:To suppress the formation of the oxide film formation of a steel stripe and to eliminate the need for pickling by using the water contg. virtually no dissolved O2 for cooling of the steel strip. CONSTITUTION:A steel strip S is heated to about 700-850 deg.C in a heating zone 110 of a continuous annealing device and after the temp. in the strip is made uniform in a soaking zone 111, the strip is cooled to about 700 deg.C in a primary cooling zone 112; further in a gas-water cooling zone 113, it is cooled down to about 400 deg.C, and in an overaging zone 114, it is held at about 400 deg.C for a constant time, then in a secondary cooling zone 115, it is cooled down to a room temp. In said zone 113, an inert gas is blown through gaz nozzles 16, and the degassed water of which the concn. of dissolved O2 is controlled to <=0.01ppm in a deaerating vessel 1 and is indirectly cooled with the cooling water supplied from a cooling tower 11 so as not to contact with the atmospheric air in a heat exchanger 12 is sprayed through water nozzles 17 from both sides of the strip S, whereby the strip is cooled. The deaerating water used for cooling is circulated through a tank 15 and the exchanger 12 by means of a pump 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8094481A JPS57198218A (en) | 1981-05-29 | 1981-05-29 | Cooling method for continuously annealed steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8094481A JPS57198218A (en) | 1981-05-29 | 1981-05-29 | Cooling method for continuously annealed steel strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57198218A true JPS57198218A (en) | 1982-12-04 |
Family
ID=13732595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8094481A Pending JPS57198218A (en) | 1981-05-29 | 1981-05-29 | Cooling method for continuously annealed steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57198218A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006316345A (en) * | 2005-04-12 | 2006-11-24 | Nippon Steel Corp | Method and apparatus for cooling steel strip in cooling zone of continuous heat treatment equipment |
| JP2008031546A (en) * | 2006-08-01 | 2008-02-14 | Nippon Steel Corp | Manufacturing method and equipment for container thin steel sheet with excellent surface appearance |
| JP2010172948A (en) * | 2009-01-30 | 2010-08-12 | Nippon Steel Corp | Method and apparatus for performing hot press-forming of steel sheet |
| US7815757B2 (en) | 2005-04-12 | 2010-10-19 | Nippon Steel Corporation | Water-cooling method of steel material |
-
1981
- 1981-05-29 JP JP8094481A patent/JPS57198218A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006316345A (en) * | 2005-04-12 | 2006-11-24 | Nippon Steel Corp | Method and apparatus for cooling steel strip in cooling zone of continuous heat treatment equipment |
| US7815757B2 (en) | 2005-04-12 | 2010-10-19 | Nippon Steel Corporation | Water-cooling method of steel material |
| CN102851468A (en) * | 2005-04-12 | 2013-01-02 | 新日本制铁株式会社 | Water-cooling method of steel material and steel material obtained by that water-cooling method |
| JP2008031546A (en) * | 2006-08-01 | 2008-02-14 | Nippon Steel Corp | Manufacturing method and equipment for container thin steel sheet with excellent surface appearance |
| JP2010172948A (en) * | 2009-01-30 | 2010-08-12 | Nippon Steel Corp | Method and apparatus for performing hot press-forming of steel sheet |
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