JPS55147403A - Production of hot rolled steel sheet excelling in press formability - Google Patents
Production of hot rolled steel sheet excelling in press formabilityInfo
- Publication number
- JPS55147403A JPS55147403A JP5601079A JP5601079A JPS55147403A JP S55147403 A JPS55147403 A JP S55147403A JP 5601079 A JP5601079 A JP 5601079A JP 5601079 A JP5601079 A JP 5601079A JP S55147403 A JPS55147403 A JP S55147403A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite
- steel
- temperature
- hot rolled
- hot
- 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
- 229910000831 Steel Inorganic materials 0.000 title abstract 4
- 239000010959 steel Substances 0.000 title abstract 4
- 229910000859 α-Fe Inorganic materials 0.000 abstract 6
- 238000001953 recrystallisation Methods 0.000 abstract 3
- 238000005098 hot rolling Methods 0.000 abstract 2
- 238000005096 rolling process Methods 0.000 abstract 2
- 229910000975 Carbon steel Inorganic materials 0.000 abstract 1
- 229910000655 Killed steel Inorganic materials 0.000 abstract 1
- 229910001327 Rimmed steel Inorganic materials 0.000 abstract 1
- 229910001336 Semi-killed steel Inorganic materials 0.000 abstract 1
- 229910001566 austenite Inorganic materials 0.000 abstract 1
- 239000010962 carbon steel Substances 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000010583 slow cooling Methods 0.000 abstract 1
Landscapes
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
PURPOSE: To produce hot rolled steel sheet having uniform ferrite grain structure suited to press forming, by finishing by hot rolling row carbon steel in ferrite region or the like, and controlling the hot roll reeling temperature so that ferrite recrystallization and grain forming may occur.
CONSTITUTION: Rimmed steel, semikilled steel or killed steel is finished by rolling in ferrite one-phase region or ferrite-austenite two-phase region above its recrystallization temperature and at a temperature enough to hold the strain caused by hot rolling for subsequent restoration of ferrite grains, that is, in the range of about 650W750°C. Said steel in finish rolling mill is reeled at reeling temperature of hot rolled sheet, that is, in the temperature range of about 550W750°C to allow enough time to form recrystallization or subsequent grain forming, in the slow cooling process to reach the ordinary temperature of hot rolled sheet after reeling. As a result, steel sheets having uniform ferrite grain structure of crystal grain number of about 6.5W8.0 suitable to press forming in the hot roll state may be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5601079A JPS55147403A (en) | 1979-05-08 | 1979-05-08 | Production of hot rolled steel sheet excelling in press formability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5601079A JPS55147403A (en) | 1979-05-08 | 1979-05-08 | Production of hot rolled steel sheet excelling in press formability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55147403A true JPS55147403A (en) | 1980-11-17 |
| JPS6211050B2 JPS6211050B2 (en) | 1987-03-10 |
Family
ID=13015076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5601079A Granted JPS55147403A (en) | 1979-05-08 | 1979-05-08 | Production of hot rolled steel sheet excelling in press formability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55147403A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5996224A (en) * | 1982-11-26 | 1984-06-02 | Nippon Kokan Kk <Nkk> | Method for manufacturing hot-rolled mild steel plate for processing |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63266985A (en) * | 1987-04-23 | 1988-11-04 | Koito Ind Co Ltd | Transmission method for TV signals, etc. within a moving body |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4953523A (en) * | 1972-09-28 | 1974-05-24 | ||
| JPS549114A (en) * | 1977-06-23 | 1979-01-23 | Sumitomo Metal Ind Ltd | Method of producing hot rolled extermely soft killed steel strip |
| JPS5425214A (en) * | 1977-07-28 | 1979-02-26 | Sumitomo Metal Ind Ltd | Method of producing hot-rolled soft steel plate |
-
1979
- 1979-05-08 JP JP5601079A patent/JPS55147403A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4953523A (en) * | 1972-09-28 | 1974-05-24 | ||
| JPS549114A (en) * | 1977-06-23 | 1979-01-23 | Sumitomo Metal Ind Ltd | Method of producing hot rolled extermely soft killed steel strip |
| JPS5425214A (en) * | 1977-07-28 | 1979-02-26 | Sumitomo Metal Ind Ltd | Method of producing hot-rolled soft steel plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5996224A (en) * | 1982-11-26 | 1984-06-02 | Nippon Kokan Kk <Nkk> | Method for manufacturing hot-rolled mild steel plate for processing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6211050B2 (en) | 1987-03-10 |
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