JPS5665931A - Manufacture of cold-rolled steel sheet for press formation - Google Patents
Manufacture of cold-rolled steel sheet for press formationInfo
- Publication number
- JPS5665931A JPS5665931A JP14164079A JP14164079A JPS5665931A JP S5665931 A JPS5665931 A JP S5665931A JP 14164079 A JP14164079 A JP 14164079A JP 14164079 A JP14164079 A JP 14164079A JP S5665931 A JPS5665931 A JP S5665931A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- overaging
- temp
- strain
- cold
- 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
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
- C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
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)
Abstract
PURPOSE:To impart excellent press formability comparable to that obtained by batch annealing, by performing simultaneous quenching and strain developing of cold rolled steel sheet having been recrystallization-annealed with a water-cooled roll, then by overaging the steel sheet while cooling slowly. CONSTITUTION:Cold-rolled steel sheet is heated rapidly from room temp. T0 to a temp. T1 which is not lower than the recrystallization temp. so as to perform recrystallization-annealing. The recrystallized steel sheet is quenched at 50-500 deg.C/sec cooling rate C2 by passing it between plural water-cooled rolls, at the same time 0.2-3% strain is imparted to the steel sheet. That is, the oversaturation of solid soln. carbon is increased at the step, and dislocation is introduced by strain, and the overaging time is reduced by the quick decrease in carbide and solid soln. carbon which precipitates during overaging process. Then the steel sheet having been imparted with strain is slowly cooled continuously or stepwise so as to overage it. The slow-cooling rate from the starting temp. T5 of overaging to the final temp. T6 (250-400 deg.C) of the overaging is set at 10-100 deg.C/min, and the overaging may be completed in about 2-8min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14164079A JPS5665931A (en) | 1979-10-31 | 1979-10-31 | Manufacture of cold-rolled steel sheet for press formation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14164079A JPS5665931A (en) | 1979-10-31 | 1979-10-31 | Manufacture of cold-rolled steel sheet for press formation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5665931A true JPS5665931A (en) | 1981-06-04 |
Family
ID=15296740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14164079A Pending JPS5665931A (en) | 1979-10-31 | 1979-10-31 | Manufacture of cold-rolled steel sheet for press formation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5665931A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360955A2 (en) * | 1988-09-28 | 1990-04-04 | Nippon Steel Corporation | Process for producing a cold rolled steel sheet having a good ageing resistance by continuous annealing |
| JPH02242749A (en) * | 1989-02-24 | 1990-09-27 | Oscar Mayer Foods Corp | Flexible package to be sealed again for disclosing mischief |
| US10202299B2 (en) | 2013-08-28 | 2019-02-12 | Nippon Electric Glass Co., Ltd. | Glass film ribbon manufacturing method and glass film ribbon manufacturing device |
-
1979
- 1979-10-31 JP JP14164079A patent/JPS5665931A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360955A2 (en) * | 1988-09-28 | 1990-04-04 | Nippon Steel Corporation | Process for producing a cold rolled steel sheet having a good ageing resistance by continuous annealing |
| JPH02242749A (en) * | 1989-02-24 | 1990-09-27 | Oscar Mayer Foods Corp | Flexible package to be sealed again for disclosing mischief |
| US10202299B2 (en) | 2013-08-28 | 2019-02-12 | Nippon Electric Glass Co., Ltd. | Glass film ribbon manufacturing method and glass film ribbon manufacturing device |
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