JPS5591934A - Preparation of composite structure high tension hot rolled steel sheet having high ductility and low yield ratio characteristic - Google Patents

Preparation of composite structure high tension hot rolled steel sheet having high ductility and low yield ratio characteristic

Info

Publication number
JPS5591934A
JPS5591934A JP16254278A JP16254278A JPS5591934A JP S5591934 A JPS5591934 A JP S5591934A JP 16254278 A JP16254278 A JP 16254278A JP 16254278 A JP16254278 A JP 16254278A JP S5591934 A JPS5591934 A JP S5591934A
Authority
JP
Japan
Prior art keywords
steel sheet
composite structure
stage
rolling
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
JP16254278A
Other languages
Japanese (ja)
Other versions
JPS5721010B2 (en
Inventor
Soji Matsuo
Kazuo Koyama
Hiroshi Mochiki
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP16254278A priority Critical patent/JPS5591934A/en
Publication of JPS5591934A publication Critical patent/JPS5591934A/en
Publication of JPS5721010B2 publication Critical patent/JPS5721010B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To manufacture the hot rolled composite structure steel sheet having superior tensile strength and workability, by controlling rolling temperature by a specified condition and continuing cooling pattern, at the time of manufacturing the steel sheet carrying out hot rolling of killed steel.
CONSTITUTION: Steel sheet is manufactured by carrying out hot rolling of killed steel containing C; 0.02W0.15%. Mn; 1W2%. On this occasion, finish rolling is finished at a temperature within the limits of 50°C more or less than Ar3 transformation point of steel material and is coiled at <250°C. Cooling from the above finish rolling ended time to coiling, is divided in the foregoing-stage part from finish rolling end to 650°C and latter stage part from 650°C to coiling. Mean cooling speed of the foregoing stage is made lower than that of the latter stage within a range between tthe cooling speed of the foregoing stage from 1 to 50°C/sec and that of the latter stage from 10 to 100°C/sec. The steel sheet composed of composite structure of ferrite, martensite and remaining austenite, having tensile strength of 50kg/mm2 or more and superior workability, is able to manufacture by hot rolling only.
COPYRIGHT: (C)1980,JPO&Japio
JP16254278A 1978-12-30 1978-12-30 Preparation of composite structure high tension hot rolled steel sheet having high ductility and low yield ratio characteristic Granted JPS5591934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16254278A JPS5591934A (en) 1978-12-30 1978-12-30 Preparation of composite structure high tension hot rolled steel sheet having high ductility and low yield ratio characteristic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16254278A JPS5591934A (en) 1978-12-30 1978-12-30 Preparation of composite structure high tension hot rolled steel sheet having high ductility and low yield ratio characteristic

Publications (2)

Publication Number Publication Date
JPS5591934A true JPS5591934A (en) 1980-07-11
JPS5721010B2 JPS5721010B2 (en) 1982-05-04

Family

ID=15756575

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16254278A Granted JPS5591934A (en) 1978-12-30 1978-12-30 Preparation of composite structure high tension hot rolled steel sheet having high ductility and low yield ratio characteristic

Country Status (1)

Country Link
JP (1) JPS5591934A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57194209A (en) * 1981-05-25 1982-11-29 Nippon Kokan Kk <Nkk> Production of hot rolled high tensile steel plate or high forming property
JPS5873212U (en) * 1981-11-12 1983-05-18 金児　猛夫 Esophageal vein “pulse” aneurysm hemostatic tube
JPS5983721A (en) * 1982-11-02 1984-05-15 Nippon Steel Corp Preparation of hot rolled steel plate having high rigidity
US4502897A (en) * 1981-02-20 1985-03-05 Kawasaki Steel Corporation Method for producing hot-rolled steel sheets having a low yield ratio and a high tensile strength due to dual phase structure
US4561910A (en) * 1981-02-20 1985-12-31 Kawasaki Steel Corporation Dual phase-structured hot rolled high-tensile strength steel sheet and a method of producing the same
US4772771A (en) * 1985-05-28 1988-09-20 Nippon Steel Corporation Method for the production of high strength electric seam welded oil-well pipe
KR100475945B1 (en) * 2002-05-06 2005-03-10 현대자동차주식회사 Heat treatment method of high strength tension steel sheet included perlite
JP2006342387A (en) * 2005-06-08 2006-12-21 Sumitomo Metal Ind Ltd High-strength hot-rolled steel sheet and its manufacturing method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS641720U (en) * 1987-06-19 1989-01-06

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502897A (en) * 1981-02-20 1985-03-05 Kawasaki Steel Corporation Method for producing hot-rolled steel sheets having a low yield ratio and a high tensile strength due to dual phase structure
US4561910A (en) * 1981-02-20 1985-12-31 Kawasaki Steel Corporation Dual phase-structured hot rolled high-tensile strength steel sheet and a method of producing the same
JPS57194209A (en) * 1981-05-25 1982-11-29 Nippon Kokan Kk <Nkk> Production of hot rolled high tensile steel plate or high forming property
JPS6339647B2 (en) * 1981-05-25 1988-08-05 Nippon Kokan Kk
JPS5873212U (en) * 1981-11-12 1983-05-18 金児　猛夫 Esophageal vein “pulse” aneurysm hemostatic tube
JPS5983721A (en) * 1982-11-02 1984-05-15 Nippon Steel Corp Preparation of hot rolled steel plate having high rigidity
JPS624448B2 (en) * 1982-11-02 1987-01-30 Nippon Steel Corp
US4772771A (en) * 1985-05-28 1988-09-20 Nippon Steel Corporation Method for the production of high strength electric seam welded oil-well pipe
KR100475945B1 (en) * 2002-05-06 2005-03-10 현대자동차주식회사 Heat treatment method of high strength tension steel sheet included perlite
JP2006342387A (en) * 2005-06-08 2006-12-21 Sumitomo Metal Ind Ltd High-strength hot-rolled steel sheet and its manufacturing method
JP4539447B2 (en) * 2005-06-08 2010-09-08 住友金属工業株式会社 High strength hot rolled steel sheet and method for producing the same

Also Published As

Publication number Publication date
JPS5721010B2 (en) 1982-05-04

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