JPS6479322A - Production of composite structure high-strength cold rolled steel sheet having excellent bulging property and fatigue characteristic - Google Patents
Production of composite structure high-strength cold rolled steel sheet having excellent bulging property and fatigue characteristicInfo
- Publication number
- JPS6479322A JPS6479322A JP23852287A JP23852287A JPS6479322A JP S6479322 A JPS6479322 A JP S6479322A JP 23852287 A JP23852287 A JP 23852287A JP 23852287 A JP23852287 A JP 23852287A JP S6479322 A JPS6479322 A JP S6479322A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- cold rolled
- sheet
- contg
- hot rolled
- 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
Landscapes
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE:To produce a high-tensile cold rolled steel sheet having an excellent fatigue characteristic and bulging property by hot rolling a billet having a specific compsn. to form a hot rolled sheet having the structure mainly composed of bainite, then subjecting the steel sheet to continuous annealing under specific conditions to form the ferrite/martensite structure contg. a prescribed ratio of residual austenite. CONSTITUTION:The billet contg., by weight, 0.10-0.25% C, 0.20-2.0% Si, 1.0-2.5% Mn, <0.10% P, <0.115% S, and 0.01-0.10% sol. Al is hot rolled to the hot rolled sheet, which is then coiled at the temp. below the Bs point and is made into the structure contg. the bainite at 50-100% area rate. This hot rolled sheet is cold rolled at >=40% draft to the final sheet thickness and is then annealed continuously. The steel sheet is subjected to recrystallization heating in the austenite/ferrite region where the content of the austenite decreases to <=70% and thereafter, the steel sheet is cooled to at >=10 deg.C/sec average cooling rate, and held at 250-450 deg.C. The high-tensile cold rolled steel sheet having the composite structure contg. >=30% ferrite, >=40% residual austenite and the balance martensite is thus produced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62238522A JP2652539B2 (en) | 1987-09-21 | 1987-09-21 | Method for producing composite structure high strength cold rolled steel sheet with excellent stretch formability and fatigue properties |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62238522A JP2652539B2 (en) | 1987-09-21 | 1987-09-21 | Method for producing composite structure high strength cold rolled steel sheet with excellent stretch formability and fatigue properties |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6479322A true JPS6479322A (en) | 1989-03-24 |
JP2652539B2 JP2652539B2 (en) | 1997-09-10 |
Family
ID=17031505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62238522A Expired - Fee Related JP2652539B2 (en) | 1987-09-21 | 1987-09-21 | Method for producing composite structure high strength cold rolled steel sheet with excellent stretch formability and fatigue properties |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2652539B2 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01168819A (en) * | 1987-12-25 | 1989-07-04 | Nisshin Steel Co Ltd | Manufacture of steel plate with composite structure having high ductility and high strength |
JPH06220580A (en) * | 1991-06-26 | 1994-08-09 | Nkk Corp | Cold rolled sheet of high strength dual-phase steel having high and uniform n-value in wide strain range and its production |
JPH1171635A (en) * | 1997-06-16 | 1999-03-16 | Kawasaki Steel Corp | High strength and high workability cold rolled steel sheet excellent in impact resistance |
JP2002088459A (en) * | 1999-11-08 | 2002-03-27 | Kawasaki Steel Corp | Galvanized steel sheet excellent in balance of strength- ductility and adhesion of plating and its production method |
WO2003078668A1 (en) * | 2002-03-18 | 2003-09-25 | Jfe Steel Corporation | Process for producing high tensile hot-dip zinc-coated steel sheet of excellent ductility and antifatigue properties |
EP1808505A1 (en) * | 2004-10-06 | 2007-07-18 | Nippon Steel Corporation | High strength thin steel plate excellent in elongation and bore expanding characteristics and method for production thereof |
JP2016503458A (en) * | 2012-11-15 | 2016-02-04 | 宝山鋼鉄股▲分▼有限公司 | High-formability ultra-high-strength cold-rolled steel sheet and manufacturing method thereof |
JP2016504490A (en) * | 2012-11-15 | 2016-02-12 | 宝山鋼鉄股▲分▼有限公司 | High formability ultra-high strength hot-dip galvanized steel sheet and method for producing the same |
CN111270161A (en) * | 2020-03-25 | 2020-06-12 | 武汉钢铁有限公司 | High-elongation hot-rolled tissue regulating steel with tensile strength of more than or equal to 1000MPa and production method thereof |
CN113684419A (en) * | 2021-08-11 | 2021-11-23 | 山东钢铁集团日照有限公司 | Low-cost 400 MPa-grade cold-rolled continuous annealing steel strip and production method thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62139821A (en) * | 1985-12-11 | 1987-06-23 | Kobe Steel Ltd | Production of high-ductility high-strength cold rolled steel sheet |
-
1987
- 1987-09-21 JP JP62238522A patent/JP2652539B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62139821A (en) * | 1985-12-11 | 1987-06-23 | Kobe Steel Ltd | Production of high-ductility high-strength cold rolled steel sheet |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01168819A (en) * | 1987-12-25 | 1989-07-04 | Nisshin Steel Co Ltd | Manufacture of steel plate with composite structure having high ductility and high strength |
JPH06220580A (en) * | 1991-06-26 | 1994-08-09 | Nkk Corp | Cold rolled sheet of high strength dual-phase steel having high and uniform n-value in wide strain range and its production |
JPH1171635A (en) * | 1997-06-16 | 1999-03-16 | Kawasaki Steel Corp | High strength and high workability cold rolled steel sheet excellent in impact resistance |
JP2002088459A (en) * | 1999-11-08 | 2002-03-27 | Kawasaki Steel Corp | Galvanized steel sheet excellent in balance of strength- ductility and adhesion of plating and its production method |
WO2003078668A1 (en) * | 2002-03-18 | 2003-09-25 | Jfe Steel Corporation | Process for producing high tensile hot-dip zinc-coated steel sheet of excellent ductility and antifatigue properties |
EP1808505A1 (en) * | 2004-10-06 | 2007-07-18 | Nippon Steel Corporation | High strength thin steel plate excellent in elongation and bore expanding characteristics and method for production thereof |
EP1808505A4 (en) * | 2004-10-06 | 2012-04-25 | Nippon Steel Corp | High strength thin steel plate excellent in elongation and bore expanding characteristics and method for production thereof |
JP2016503458A (en) * | 2012-11-15 | 2016-02-04 | 宝山鋼鉄股▲分▼有限公司 | High-formability ultra-high-strength cold-rolled steel sheet and manufacturing method thereof |
JP2016504490A (en) * | 2012-11-15 | 2016-02-12 | 宝山鋼鉄股▲分▼有限公司 | High formability ultra-high strength hot-dip galvanized steel sheet and method for producing the same |
US10100385B2 (en) | 2012-11-15 | 2018-10-16 | Baoshan Iron & Steel Co., Ltd. | High-formability and super-strength hot galvanizing steel plate and manufacturing method thereof |
US10287659B2 (en) | 2012-11-15 | 2019-05-14 | Baoshan Iron & Steel Co., Ltd. | High-formability and super-strength cold-rolled steel sheet |
CN111270161A (en) * | 2020-03-25 | 2020-06-12 | 武汉钢铁有限公司 | High-elongation hot-rolled tissue regulating steel with tensile strength of more than or equal to 1000MPa and production method thereof |
CN111270161B (en) * | 2020-03-25 | 2021-06-15 | 武汉钢铁有限公司 | High-elongation hot-rolled tissue regulating steel with tensile strength of more than or equal to 1000MPa and production method thereof |
CN113684419A (en) * | 2021-08-11 | 2021-11-23 | 山东钢铁集团日照有限公司 | Low-cost 400 MPa-grade cold-rolled continuous annealing steel strip and production method thereof |
Also Published As
Publication number | Publication date |
---|---|
JP2652539B2 (en) | 1997-09-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |