JPS5760053A - High-tensile hot-rolled steel plate with superior workability and its manufacture - Google Patents

High-tensile hot-rolled steel plate with superior workability and its manufacture

Info

Publication number
JPS5760053A
JPS5760053A JP13428480A JP13428480A JPS5760053A JP S5760053 A JPS5760053 A JP S5760053A JP 13428480 A JP13428480 A JP 13428480A JP 13428480 A JP13428480 A JP 13428480A JP S5760053 A JPS5760053 A JP S5760053A
Authority
JP
Japan
Prior art keywords
strip
steel plate
rolled steel
hot
manufacture
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
JP13428480A
Other languages
Japanese (ja)
Other versions
JPS6035969B2 (en
Inventor
Kazuhide Nakaoka
Akihiko Nishimoto
Tomoyoshi Okita
Yoshihiro Hosoya
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP13428480A priority Critical patent/JPS6035969B2/en
Publication of JPS5760053A publication Critical patent/JPS5760053A/en
Publication of JPS6035969B2 publication Critical patent/JPS6035969B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To enhance the workability of a hot rolled steel plate and the quality balance between strength and ductility by subjecting the plate to a specified heat treatment to convert the structure into a 2-phase one.
CONSTITUTION: A steel slab contg. 0.05W0.15% C, 0.3W1.2% Si, 0.8W2.4% Mn, <0.03% S and 0.02W0.06% sol. Al or further contg. one or more among <0.15% V, <0.5% Cr and <0.5% Mo is finished to a strip by hot rolling at 800W 900°C. The strip is cooled at ≥30°C/sec cooling rate and coiled at ≤550°C to provide 60W90% phase transformed at low temp. to the microstructure of the strip. The strip is then heated at Ac1+50°CWAc3 at which ferrite and austenite phases coexist for 1W7min, and it is cooled at 15W80°C/sec cooling rate. Thus, a hightensile hot-rolled steel plate having a 2-phase structure composed of ferrite and 15W 25vol% bainite or martensite can be manufactured.
COPYRIGHT: (C)1982,JPO&Japio
JP13428480A 1980-09-29 1980-09-29 Manufacturing method for high-strength hot-rolled steel sheet with excellent workability Expired JPS6035969B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13428480A JPS6035969B2 (en) 1980-09-29 1980-09-29 Manufacturing method for high-strength hot-rolled steel sheet with excellent workability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13428480A JPS6035969B2 (en) 1980-09-29 1980-09-29 Manufacturing method for high-strength hot-rolled steel sheet with excellent workability

Publications (2)

Publication Number Publication Date
JPS5760053A true JPS5760053A (en) 1982-04-10
JPS6035969B2 JPS6035969B2 (en) 1985-08-17

Family

ID=15124678

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13428480A Expired JPS6035969B2 (en) 1980-09-29 1980-09-29 Manufacturing method for high-strength hot-rolled steel sheet with excellent workability

Country Status (1)

Country Link
JP (1) JPS6035969B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5842725A (en) * 1981-09-04 1983-03-12 Kobe Steel Ltd Manufacture of high strength hot rolled steel plate with superior workability
JPS60204828A (en) * 1984-03-27 1985-10-16 Sumitomo Metal Ind Ltd Manufacture of tough and hard hot rolled steel strip having separation resistance
JPS60204827A (en) * 1984-03-27 1985-10-16 Sumitomo Metal Ind Ltd Manufacture of hot rolled steel plate having superior resistance to vertical cracking
US4773947A (en) * 1983-08-02 1988-09-27 Nissan Motor Co., Ltd. Manufacturing process for high temperature carburized case harden steel

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5842725A (en) * 1981-09-04 1983-03-12 Kobe Steel Ltd Manufacture of high strength hot rolled steel plate with superior workability
JPH0248608B2 (en) * 1981-09-04 1990-10-25 Kobe Steel Ltd
US4773947A (en) * 1983-08-02 1988-09-27 Nissan Motor Co., Ltd. Manufacturing process for high temperature carburized case harden steel
JPS60204828A (en) * 1984-03-27 1985-10-16 Sumitomo Metal Ind Ltd Manufacture of tough and hard hot rolled steel strip having separation resistance
JPS60204827A (en) * 1984-03-27 1985-10-16 Sumitomo Metal Ind Ltd Manufacture of hot rolled steel plate having superior resistance to vertical cracking
JPH0128814B2 (en) * 1984-03-27 1989-06-06 Sumitomo Metal Ind
JPH0128811B2 (en) * 1984-03-27 1989-06-06 Sumitomo Metal Ind

Also Published As

Publication number Publication date
JPS6035969B2 (en) 1985-08-17

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