JPS55100925A - Production of cold rolled steel plate by heat treatment for a short time - Google Patents
Production of cold rolled steel plate by heat treatment for a short timeInfo
- Publication number
- JPS55100925A JPS55100925A JP791779A JP791779A JPS55100925A JP S55100925 A JPS55100925 A JP S55100925A JP 791779 A JP791779 A JP 791779A JP 791779 A JP791779 A JP 791779A JP S55100925 A JPS55100925 A JP S55100925A
- Authority
- JP
- Japan
- Prior art keywords
- hot rolling
- heat treatment
- short time
- temperature
- 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.)
- Granted
Links
Landscapes
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE: To improve workability by a method wherein hot rolling of extremely low carbon content aluminum killed steel is completed at a low temperature below Ar3 transformation temperature, the steel being cold-rolled and then continuous annealing is carried out for a short time.
CONSTITUTION: Steel piece of aluminum killed steel containing C<0.02%, Mn< 0.4%, Al 0.02W0.10% and N 0.001W0.010% is subjected to hot rolling operation. During the hot rolling operation between heating furnace and the outlet of hot rolling mil, AlN is deposited at a temperature below Ar3 transformation temperature. The hot rolling is completed at a low temperature below 800°C. Since carbon content is 0.02%, duplex structure is not formed by the above heat treatment. As residence time at a temperature of below Ar3 transformation temperature upto 800°C is above 5sec., AlN is deposited sufficiently, and strain is accumulated in the state of fervite. Then by annealing for a short time, ef. for several seconds, the steel material is softened to improve workability. As heat treatment is carried out at a lower temperature than prior art, heat energy is saved.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP791779A JPS6041690B2 (en) | 1979-01-25 | 1979-01-25 | Method for manufacturing cold-rolled steel sheets by short-time heat treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP791779A JPS6041690B2 (en) | 1979-01-25 | 1979-01-25 | Method for manufacturing cold-rolled steel sheets by short-time heat treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55100925A true JPS55100925A (en) | 1980-08-01 |
| JPS6041690B2 JPS6041690B2 (en) | 1985-09-18 |
Family
ID=11678876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP791779A Expired JPS6041690B2 (en) | 1979-01-25 | 1979-01-25 | Method for manufacturing cold-rolled steel sheets by short-time heat treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6041690B2 (en) |
-
1979
- 1979-01-25 JP JP791779A patent/JPS6041690B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6041690B2 (en) | 1985-09-18 |
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