JPS55161028A - Manufacture of high strength cold rolled sheet having superior press moldability and weather resistance - Google Patents
Manufacture of high strength cold rolled sheet having superior press moldability and weather resistanceInfo
- Publication number
- JPS55161028A JPS55161028A JP6797079A JP6797079A JPS55161028A JP S55161028 A JPS55161028 A JP S55161028A JP 6797079 A JP6797079 A JP 6797079A JP 6797079 A JP6797079 A JP 6797079A JP S55161028 A JPS55161028 A JP S55161028A
- Authority
- JP
- Japan
- Prior art keywords
- weather resistance
- high strength
- cold rolled
- manufacture
- slab
- 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
- C21D9/46—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 Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE:To obtain the steel sheet for motorcar, etc. having superior press moldability, weather resistance and high strength, by regulating the condition of heat treatment and processing at hot rolling, coiling, cold rolling, annealing, etc. of steel slab containing a suitable amount of Si, Mn and coexisting with P, Cu. CONSTITUTION:Ingot or continuous casting slab containing C; 0.01-0.20wt%, Si; 0.3-3.0%, Mn; 0.2-1.2% (where, Mn/Si>1) and P; 0.03-0.20%, Cu; 0.2- 1.2% in a single or composite state, is manufactured. Finish hot rolling of the above slab is carried out at a temperature of Ar3 point or more and rolled slab is coiled at a tmeperature of 600 deg.C or less after cooling at a speed of 30 deg.C/sec or more. Next, temperature is raised at a speed of 150 deg.C/hr or less after carrying out descaling and cold rolling and then, annealing is carried out at 650-800 deg.C. By the above steel composition and treating and processing condition, cold rolled steel sheet is obtained excellent in strength, processing property and weather resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6797079A JPS5842248B2 (en) | 1979-05-30 | 1979-05-30 | Manufacturing method for high-strength cold-rolled steel sheets with excellent press formability and weather resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6797079A JPS5842248B2 (en) | 1979-05-30 | 1979-05-30 | Manufacturing method for high-strength cold-rolled steel sheets with excellent press formability and weather resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55161028A true JPS55161028A (en) | 1980-12-15 |
| JPS5842248B2 JPS5842248B2 (en) | 1983-09-19 |
Family
ID=13360339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6797079A Expired JPS5842248B2 (en) | 1979-05-30 | 1979-05-30 | Manufacturing method for high-strength cold-rolled steel sheets with excellent press formability and weather resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5842248B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5729531A (en) * | 1980-07-29 | 1982-02-17 | Kobe Steel Ltd | Preparation of high strength cold rolled steel plate having excelent surface properties and press formability |
| KR20000043762A (en) * | 1998-12-29 | 2000-07-15 | 이구택 | Method of manufacturing super high-strength cold-rolled steel sheet improved in ductility |
-
1979
- 1979-05-30 JP JP6797079A patent/JPS5842248B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5729531A (en) * | 1980-07-29 | 1982-02-17 | Kobe Steel Ltd | Preparation of high strength cold rolled steel plate having excelent surface properties and press formability |
| KR20000043762A (en) * | 1998-12-29 | 2000-07-15 | 이구택 | Method of manufacturing super high-strength cold-rolled steel sheet improved in ductility |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5842248B2 (en) | 1983-09-19 |
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