JPS5562125A - Preparation of high strength cold rolled steel sheet having dent resisting property excellent in press moldability - Google Patents
Preparation of high strength cold rolled steel sheet having dent resisting property excellent in press moldabilityInfo
- Publication number
- JPS5562125A JPS5562125A JP13516278A JP13516278A JPS5562125A JP S5562125 A JPS5562125 A JP S5562125A JP 13516278 A JP13516278 A JP 13516278A JP 13516278 A JP13516278 A JP 13516278A JP S5562125 A JPS5562125 A JP S5562125A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- point
- carried out
- high strength
- rolled steel
- 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 Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE:To obtain the above mentioned sheet having a high yeild point and good elongation or n value, by carrying out the primary cooling unitl less than A1 point at a limited speed after carrying out cold rolling of steel composed of a specific quantity of C.Si.Mn.P.S.Sol.Al and N, after hot rolling and next, carrying out continuous annealing. CONSTITUTION:Hot rolling of steel composed of C<=0.1%, Si<=3%, Mn;0.15- 0.5%, P;0.01-0.1%, S<=0.03%, Sol.Al;0.02-0.07% and N;0.002-0.008%, is carried cut at a finishing temperature of more than A3 point and winding temperature of more than 600 deg.C. Next, cold rolling is carried out at more than 40% of draft and the primary cooling is carried out at less than 100 deg.C/sec. of cooling velocity cooling until less than A1 point (normally, 500-650 deg.C) after heating at 700- 800 deg.C by continuous annealing. Moreover, the secondary cooling is carried out cooling to a tempering temperature at the optional cooling velocity and tempering is carried out at 200-500 deg.C. By the above method, high strength cold rolled steel sheet composed of two phase structure of ferrite and pearlite, having a superior workability, is manufactured.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13516278A JPS5562125A (en) | 1978-11-04 | 1978-11-04 | Preparation of high strength cold rolled steel sheet having dent resisting property excellent in press moldability |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13516278A JPS5562125A (en) | 1978-11-04 | 1978-11-04 | Preparation of high strength cold rolled steel sheet having dent resisting property excellent in press moldability |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5562125A true JPS5562125A (en) | 1980-05-10 |
Family
ID=15145264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13516278A Pending JPS5562125A (en) | 1978-11-04 | 1978-11-04 | Preparation of high strength cold rolled steel sheet having dent resisting property excellent in press moldability |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5562125A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS572841A (en) * | 1980-06-06 | 1982-01-08 | Nippon Steel Corp | Production of high strength cold-rolled steel plate which has high baking hardness and is superior in aging resistance and press workability by continuous annealing |
JPS5767129A (en) * | 1980-09-25 | 1982-04-23 | Nippon Steel Corp | Production of high-strength cold rolled steel plate for automobile |
JPS61117225A (en) * | 1985-10-31 | 1986-06-04 | Nippon Kokan Kk <Nkk> | Manufacture of high strength cold rolled steel sheet superior in press formability and baking hardenability |
CN102226248A (en) * | 2011-06-09 | 2011-10-26 | 北京科技大学 | Carbon silicon manganese hot rolled quenching and partitioning (Q&P) steel and preparation method thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53122612A (en) * | 1977-04-01 | 1978-10-26 | Nippon Kokan Kk <Nkk> | Method of fabricating high tensile cold rolled steel plate |
-
1978
- 1978-11-04 JP JP13516278A patent/JPS5562125A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53122612A (en) * | 1977-04-01 | 1978-10-26 | Nippon Kokan Kk <Nkk> | Method of fabricating high tensile cold rolled steel plate |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS572841A (en) * | 1980-06-06 | 1982-01-08 | Nippon Steel Corp | Production of high strength cold-rolled steel plate which has high baking hardness and is superior in aging resistance and press workability by continuous annealing |
JPS6046165B2 (en) * | 1980-06-06 | 1985-10-15 | 新日本製鐵株式会社 | A method for producing high-strength cold-rolled steel sheets with high bake hardenability, excellent aging resistance, and press workability by continuous annealing. |
JPS5767129A (en) * | 1980-09-25 | 1982-04-23 | Nippon Steel Corp | Production of high-strength cold rolled steel plate for automobile |
JPS5857492B2 (en) * | 1980-09-25 | 1983-12-20 | 新日本製鐵株式会社 | Manufacturing method of high-strength cold-rolled steel sheet for automobiles |
JPS61117225A (en) * | 1985-10-31 | 1986-06-04 | Nippon Kokan Kk <Nkk> | Manufacture of high strength cold rolled steel sheet superior in press formability and baking hardenability |
CN102226248A (en) * | 2011-06-09 | 2011-10-26 | 北京科技大学 | Carbon silicon manganese hot rolled quenching and partitioning (Q&P) steel and preparation method thereof |
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