JPS5635727A - Production of unequal thickness a -killed type cold-rolled high tensile steel plate - Google Patents
Production of unequal thickness a -killed type cold-rolled high tensile steel plateInfo
- Publication number
- JPS5635727A JPS5635727A JP11217879A JP11217879A JPS5635727A JP S5635727 A JPS5635727 A JP S5635727A JP 11217879 A JP11217879 A JP 11217879A JP 11217879 A JP11217879 A JP 11217879A JP S5635727 A JPS5635727 A JP S5635727A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- rolling
- rolled
- unequal thickness
- thickness
- 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 produce a titled steel plate of superior surface characteristics, tensile strength, quenching hardenability and dent resistance by hot-rolling the steel material of the specified Mn, P, Al, Si and C components to unequal thickness then cold rolling the same and subjecting this to batch annealing under proper conditions. CONSTITUTION:The Al killed type steel material comprising essentially 0.2-0.6% Mn, 0.04-0.15% P, 0.02-0.08% Al, <=0.10% C, further contg. <=0.04 Si and comprising Fe for the remainder is hot-rolled at a finishing temperature of >=Ar3 and is then rolled with hourglass rolling rolls in such a manner that the thickness ratio between the central part and end part of the steel plate is made >=1.1 in rough rolling or finish rolling prestage process, after which this thickness ratio is maintained approximately. It is then coiled at <=600 deg.C, is pickled and is cold-rolled at a draft of >=40%. This steel plate is quickly heated at >=50 deg.C 1h in a batch type annealing furnace, is annealed for a predetermined time at recrystallization temperature-750 deg.C, is then cooled at an instantaneous cooling rate of >=0.15T deg.C 1h at a passage temperature T deg.C, whereby the unequal thickness steel plate of 35- 45kg f/mm.<2> tensile strength is produced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11217879A JPS5635727A (en) | 1979-08-31 | 1979-08-31 | Production of unequal thickness a -killed type cold-rolled high tensile steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11217879A JPS5635727A (en) | 1979-08-31 | 1979-08-31 | Production of unequal thickness a -killed type cold-rolled high tensile steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5635727A true JPS5635727A (en) | 1981-04-08 |
| JPS6110013B2 JPS6110013B2 (en) | 1986-03-27 |
Family
ID=14580197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11217879A Granted JPS5635727A (en) | 1979-08-31 | 1979-08-31 | Production of unequal thickness a -killed type cold-rolled high tensile steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5635727A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003018857A1 (en) * | 2001-08-24 | 2003-03-06 | Nippon Steel Corporation | Steel plate exhibiting excellent workability and method for producing the same |
-
1979
- 1979-08-31 JP JP11217879A patent/JPS5635727A/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003018857A1 (en) * | 2001-08-24 | 2003-03-06 | Nippon Steel Corporation | Steel plate exhibiting excellent workability and method for producing the same |
| EP1431407A4 (en) * | 2001-08-24 | 2006-01-04 | Nippon Steel Corp | Steel plate exhibiting excellent workability and method for producing the same |
| US7534312B2 (en) | 2001-08-24 | 2009-05-19 | Nippon Steel Corporation | Steel plate exhibiting excellent workability and method for producing the same |
| US7749343B2 (en) | 2001-08-24 | 2010-07-06 | Nippon Steel Corporation | Method to produce steel sheet excellent in workability |
| US7776161B2 (en) | 2001-08-24 | 2010-08-17 | Nippon Steel Corporation | Cold-rolled steel sheet excellent in workability |
| US8052807B2 (en) | 2001-08-24 | 2011-11-08 | Nippon Steel Corporation | Steel sheet excellent in workability |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6110013B2 (en) | 1986-03-27 |
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