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 characteristic

Info

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
Application number
JP23852287A
Other languages
Japanese (ja)
Other versions
JP2652539B2 (en
Inventor
Hidenori Shirasawa
Fukuteru Tanaka
Yoshinobu Omiya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP62238522A priority Critical patent/JP2652539B2/en
Publication of JPS6479322A publication Critical patent/JPS6479322A/en
Application granted granted Critical
Publication of JP2652539B2 publication Critical patent/JP2652539B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • 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.
JP62238522A 1987-09-21 1987-09-21 Method for producing composite structure high strength cold rolled steel sheet with excellent stretch formability and fatigue properties Expired - Fee Related JP2652539B2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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LAPS Cancellation because of no payment of annual fees