JPS54155920A - Manufacture of hot rolled high tensile steel plate - Google Patents
Manufacture of hot rolled high tensile steel plateInfo
- Publication number
- JPS54155920A JPS54155920A JP6481578A JP6481578A JPS54155920A JP S54155920 A JPS54155920 A JP S54155920A JP 6481578 A JP6481578 A JP 6481578A JP 6481578 A JP6481578 A JP 6481578A JP S54155920 A JPS54155920 A JP S54155920A
- Authority
- JP
- Japan
- Prior art keywords
- hot rolled
- plate
- high tensile
- steel plate
- tensile steel
- 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.)
- Pending
Links
Abstract
PURPOSE: To manufacture a hot rolled high tensile steel plate of bainite structure having superior cold workability, toughness, weldability, strungth and yield ratio by hot rolling low C-high Mn-Mo-Cr-Nb type steel under specified conditions followed by coiling and cooling.
CONSTITUTION: Steel is cast contg. C; 0.03W0.15%, Si; 0.1W1.0%, Mn; 1.5W 2.0%, Mo<0.3%, Cr; 0.3W0.6%, sol. Al<0.05%, Nb; 0.01W0;1%, S<0.01% and one or more out of REM; 0.005W0.1%, Ca; 0.005W0.01%, Zr; 0.01W0.1% and Ti; 0.03W0.08%. The resulting ingot is heated to above 1200°C and hot rolled to a plate. This plate is finish hot rolled in the temp. range of 750W900°C and coiled in the temp. range of 550W600°C. At this time, the average cooling speed of the plate from the finish hot rolling to coiling is regulated to above 8°/sec. Thus, a hot rolled high tensile steel plate is obtd. having a strength about 80 kg/mm2 and an yield ratio below 0.85.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6481578A JPS54155920A (en) | 1978-05-30 | 1978-05-30 | Manufacture of hot rolled high tensile steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6481578A JPS54155920A (en) | 1978-05-30 | 1978-05-30 | Manufacture of hot rolled high tensile steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54155920A true JPS54155920A (en) | 1979-12-08 |
Family
ID=13269110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6481578A Pending JPS54155920A (en) | 1978-05-30 | 1978-05-30 | Manufacture of hot rolled high tensile steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54155920A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4407680A (en) * | 1980-01-18 | 1983-10-04 | British Steel Corporation | Dual-phase steels |
| JPS58185719A (en) * | 1982-04-20 | 1983-10-29 | Kobe Steel Ltd | Manufacture of high yield ratio type unnormalized hot-rolled high-tension steel plate |
| KR100400865B1 (en) * | 1998-12-29 | 2003-12-24 | 주식회사 포스코 | High strength hot rolled steel sheet and its manufacturing method |
| JP2014088596A (en) * | 2012-10-30 | 2014-05-15 | Kobe Steel Ltd | Hot rolled steel sheet having bendability and fatigue characteristics of weld joint and rectangular cylindrical structure body |
-
1978
- 1978-05-30 JP JP6481578A patent/JPS54155920A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4407680A (en) * | 1980-01-18 | 1983-10-04 | British Steel Corporation | Dual-phase steels |
| JPS58185719A (en) * | 1982-04-20 | 1983-10-29 | Kobe Steel Ltd | Manufacture of high yield ratio type unnormalized hot-rolled high-tension steel plate |
| KR100400865B1 (en) * | 1998-12-29 | 2003-12-24 | 주식회사 포스코 | High strength hot rolled steel sheet and its manufacturing method |
| JP2014088596A (en) * | 2012-10-30 | 2014-05-15 | Kobe Steel Ltd | Hot rolled steel sheet having bendability and fatigue characteristics of weld joint and rectangular cylindrical structure body |
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