JPS5633429A - Manufacture of hot rolled high tensile steel sheet - Google Patents
Manufacture of hot rolled high tensile steel sheetInfo
- Publication number
- JPS5633429A JPS5633429A JP10991879A JP10991879A JPS5633429A JP S5633429 A JPS5633429 A JP S5633429A JP 10991879 A JP10991879 A JP 10991879A JP 10991879 A JP10991879 A JP 10991879A JP S5633429 A JPS5633429 A JP S5633429A
- Authority
- JP
- Japan
- Prior art keywords
- temp
- sheet
- steel sheet
- high tensile
- 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.)
- Pending
Links
Landscapes
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE: To manufacture hot rolled high tensile steel sheet of composite structure having ferrite and martensite structures, by hot rolling a steel material contg. a small quantity of alloy elements into sheet, then by controlling the cooling of the sheet under specific conditions.
CONSTITUTION: A steel material contg. as fundamental components <0.20% C, <2% Si, 0.60W3.0% Mn, <0.100% soluble Al, and if necessary one or more members among the group <0.5% Mo, <0.5% Cr, <0.5% Ni, <0.5% Cu, in addition if necessary <0.01% Ca, <0.10% Zr, 0.10% rare earth is finish rolled at ≥ Ar3 transformation temp. into sheet. Said rolled steel sheet is rapidly colled from 720W850°C temp. to ≥500°C temp. at 30W200°C/sec cooling rate. After allowed to cool naturally etc. from said temp., the steel sheet is rapidly cooled once again from 500W700°C temp. at said cooling rate, and is wound into a coil at 200°C temp.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10991879A JPS5633429A (en) | 1979-08-28 | 1979-08-28 | Manufacture of hot rolled high tensile steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10991879A JPS5633429A (en) | 1979-08-28 | 1979-08-28 | Manufacture of hot rolled high tensile steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5633429A true JPS5633429A (en) | 1981-04-03 |
Family
ID=14522429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10991879A Pending JPS5633429A (en) | 1979-08-28 | 1979-08-28 | Manufacture of hot rolled high tensile steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5633429A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57137426A (en) * | 1981-02-20 | 1982-08-25 | Kawasaki Steel Corp | Production of low yield ratio, high tensile hot rolled steel plate by mixed structure |
| JPS6029452A (en) * | 1983-07-29 | 1985-02-14 | Nippon Steel Corp | High tensile strength steel with excellent brittle fracture propagation stopping properties |
| US4772771A (en) * | 1985-05-28 | 1988-09-20 | Nippon Steel Corporation | Method for the production of high strength electric seam welded oil-well pipe |
| EP1149925A1 (en) * | 1999-09-29 | 2001-10-31 | Nkk Corporation | Sheet steel and method for producing sheet steel |
-
1979
- 1979-08-28 JP JP10991879A patent/JPS5633429A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57137426A (en) * | 1981-02-20 | 1982-08-25 | Kawasaki Steel Corp | Production of low yield ratio, high tensile hot rolled steel plate by mixed structure |
| WO1982002902A1 (en) * | 1981-02-20 | 1982-09-02 | Morita Masahiko | Process for manufacturing high-tensile,hot-rolled steel strip having a low yield ratio due to its mixed structure |
| EP0072867A1 (en) * | 1981-02-20 | 1983-03-02 | Kawasaki Steel Corporation | Process for manufacturing high-tensile hot-rolled steel strip having a low yield ratio due to its mixed structure |
| JPS6111291B2 (en) * | 1981-02-20 | 1986-04-02 | Kawasaki Steel Co | |
| EP0072867B1 (en) * | 1981-02-20 | 1986-04-16 | Kawasaki Steel Corporation | Process for manufacturing high-tensile hot-rolled steel strip having a low yield ratio due to its mixed structure |
| JPS6029452A (en) * | 1983-07-29 | 1985-02-14 | Nippon Steel Corp | High tensile strength steel with excellent brittle fracture propagation stopping properties |
| US4772771A (en) * | 1985-05-28 | 1988-09-20 | Nippon Steel Corporation | Method for the production of high strength electric seam welded oil-well pipe |
| US6818079B2 (en) | 1999-09-19 | 2004-11-16 | Nkk Corporation | Method for manufacturing a steel sheet |
| EP1149925A1 (en) * | 1999-09-29 | 2001-10-31 | Nkk Corporation | Sheet steel and method for producing sheet steel |
| US6623573B2 (en) | 1999-09-29 | 2003-09-23 | Nkk Corporation | Steel sheet and method for manufacturing the same |
| EP1149925A4 (en) * | 1999-09-29 | 2005-01-12 | Jfe Steel Corp | Sheet steel and method for producing sheet steel |
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