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 manufactureInfo
- 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
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
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)
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 |
-
1980
- 1980-09-29 JP JP13428480A patent/JPS6035969B2/en not_active Expired
Cited By (7)
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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