JPS5677333A - Production of composite structure type high ductility high strength cold-rolled steel plate - Google Patents
Production of composite structure type high ductility high strength cold-rolled steel plateInfo
- Publication number
- JPS5677333A JPS5677333A JP15524679A JP15524679A JPS5677333A JP S5677333 A JPS5677333 A JP S5677333A JP 15524679 A JP15524679 A JP 15524679A JP 15524679 A JP15524679 A JP 15524679A JP S5677333 A JPS5677333 A JP S5677333A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- rolled steel
- composite structure
- structure type
- ductility
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE:To improve strength and ductility in equil. through addition of less alloy elements by controlling the cumulative draft in an unrecrystallized austenite region according to the alloy component composition of steel in a hot rolling process at the time of producing a high strength cold-rolled steel plate. CONSTITUTION:A steel input contg. 0.01-0.2% C, 1.0-2.5% Mn, <1.0% Si, or further containing specific small amounts of Cr, Ni, Mo, Cu, P, Ca and one or two or more kinds of Ca and Cl or Mg or specific small amounts of Nb, V and one or two or more kinds of Ti or Zr or contg. both of these is used as a raw material. At the time of hot rolling the steel ingot, it is so performed that the cumulative draft at <=950 deg.C becomes >=50%, and the rolling finish temp. is kept at above the Ar3 point. The plate is wound at <=550 deg.C temperatures. This hot-rolled steel plate is coled-rolled to intended thickness and is wound to a coil, after which it is subjected to box type annealing at two-phase region temperatures of ferrite and austenite. The cold-rolled steel plate of composite structure type of superior strength and ductility is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15524679A JPS5677333A (en) | 1979-11-29 | 1979-11-29 | Production of composite structure type high ductility high strength cold-rolled steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15524679A JPS5677333A (en) | 1979-11-29 | 1979-11-29 | Production of composite structure type high ductility high strength cold-rolled steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5677333A true JPS5677333A (en) | 1981-06-25 |
| JPS6142766B2 JPS6142766B2 (en) | 1986-09-24 |
Family
ID=15601718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15524679A Granted JPS5677333A (en) | 1979-11-29 | 1979-11-29 | Production of composite structure type high ductility high strength cold-rolled steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5677333A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002103071A1 (en) * | 2001-06-19 | 2002-12-27 | Jfe Steel Corporation | High tensile hot rolled steel sheet excellent in shape freezing property and endurance fatigue characteristics after forming |
| KR100496565B1 (en) * | 2000-12-20 | 2005-06-23 | 주식회사 포스코 | The making method for the cold rolled high strength sheet steel with excellent ductility |
| CN102534369A (en) * | 2012-01-13 | 2012-07-04 | 北京科技大学 | Method for preparing N80 steel-grade expansion tubes for petroleum and natural gas exploitation |
-
1979
- 1979-11-29 JP JP15524679A patent/JPS5677333A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100496565B1 (en) * | 2000-12-20 | 2005-06-23 | 주식회사 포스코 | The making method for the cold rolled high strength sheet steel with excellent ductility |
| WO2002103071A1 (en) * | 2001-06-19 | 2002-12-27 | Jfe Steel Corporation | High tensile hot rolled steel sheet excellent in shape freezing property and endurance fatigue characteristics after forming |
| KR100903546B1 (en) | 2001-06-19 | 2009-06-23 | 제이에프이 스틸 가부시키가이샤 | High tensile hot rolled steel sheet excellent in shape freezing property and endurance fatigue characteristics after forming |
| CN102534369A (en) * | 2012-01-13 | 2012-07-04 | 北京科技大学 | Method for preparing N80 steel-grade expansion tubes for petroleum and natural gas exploitation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6142766B2 (en) | 1986-09-24 |
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