JPS556421A - Feeding method for cooling water into water quenching unit of continuous annealing line - Google Patents
Feeding method for cooling water into water quenching unit of continuous annealing lineInfo
- Publication number
- JPS556421A JPS556421A JP7699878A JP7699878A JPS556421A JP S556421 A JPS556421 A JP S556421A JP 7699878 A JP7699878 A JP 7699878A JP 7699878 A JP7699878 A JP 7699878A JP S556421 A JPS556421 A JP S556421A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- water
- temperature
- cooling water
- continuous annealing
- 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
- 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
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
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 improve the quality of steel strip and to recover the warm water of about 90 deg.C, by making up the fresh water so as to prevent the temperature rise and hold constant temperature of the spray cooling water being recycled, due to the heat of steel strip, at the continuous annealing of the steel strip. CONSTITUTION:The cold rolled steel sheet 4 is heated to 700-800 deg.C, and is treated by the recrystallization annealing, and is quenched by the spray box 5 to under 300 deg.C, and then, is treated by reheating and aging; hereby, the deep drawing steel sheet or the cold rolled high tension steel sheet is manufactured. Hereupon, the temperature of the spray cooling water rises up because of recycling; which causes deormation of steel sheet 4 owing to lack of cooling, and the formation of spatter type film; on purpose to prevent these troubles, the cold fresh water is sent from the feed pipe 14 to the spray box 5 through the comparator 27. The temperature of steel sheet 4 is measured by the thermometer 26, and the fresh water is sent to the inclined duct 10 as well; hereby, the steel sheet 4 is thoroughly cooled. The warm water of about 90 deg.C in the recycling tank 17 can be utilized as the cleaning warm water for the steel sheet 4, so that the electric power for heating the cleaning water becomes unnecessary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7699878A JPS556421A (en) | 1978-06-27 | 1978-06-27 | Feeding method for cooling water into water quenching unit of continuous annealing line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7699878A JPS556421A (en) | 1978-06-27 | 1978-06-27 | Feeding method for cooling water into water quenching unit of continuous annealing line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS556421A true JPS556421A (en) | 1980-01-17 |
Family
ID=13621438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7699878A Pending JPS556421A (en) | 1978-06-27 | 1978-06-27 | Feeding method for cooling water into water quenching unit of continuous annealing line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS556421A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005240077A (en) * | 2004-02-25 | 2005-09-08 | Jfe Steel Kk | Method for manufacturing high-strength cold-rolled steel sheet |
-
1978
- 1978-06-27 JP JP7699878A patent/JPS556421A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005240077A (en) * | 2004-02-25 | 2005-09-08 | Jfe Steel Kk | Method for manufacturing high-strength cold-rolled steel sheet |
| JP4547936B2 (en) * | 2004-02-25 | 2010-09-22 | Ｊｆｅスチール株式会社 | Manufacturing method of high-strength cold-rolled steel sheet |
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