JPS55100926A - Prevention of strength irregularity in outer circumference of hot rolled coil - Google Patents
Prevention of strength irregularity in outer circumference of hot rolled coilInfo
- Publication number
- JPS55100926A JPS55100926A JP800579A JP800579A JPS55100926A JP S55100926 A JPS55100926 A JP S55100926A JP 800579 A JP800579 A JP 800579A JP 800579 A JP800579 A JP 800579A JP S55100926 A JPS55100926 A JP S55100926A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- austenite
- zone
- steel
- outer circumference
- 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)
Abstract
PURPOSE: To prevent surely strength irregularity in the outer circumference of coil by a method wherein rolling reduction in austenite recrystallization zone and in austenite uncrystallization zone is made above 60% in the porduction of hot rolled coil comprising hot-rolling a steel material containing Nb, V, cooling it with water and winding up it.
CONSTITUTION: Steel materials containing C 0.03W0.20%, Si<0.50%, Mn 0.8W 2.0% and Nb 0.05W0.10% and/or V 0.005W0.15%, are rough-rolled and finishing- rolled by a hot strip mill in order to produce steel strip. In this case, rolling reduction above 60% in austenite recrystallization zone is given to the steel to finely divide recrystallized austenite grain. Rolling reduction above 60% in austenite uncrystallization zone is also given to steel to introduce deformation zone into austenite grain. Unniformity in quality is prevented in which yield strength, tensile strength and yield ratio in the outer circumference of coil are unusually greater than those in the central part of the coil when the strip is wound into the coil.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP800579A JPS55100926A (en) | 1979-01-25 | 1979-01-25 | Prevention of strength irregularity in outer circumference of hot rolled coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP800579A JPS55100926A (en) | 1979-01-25 | 1979-01-25 | Prevention of strength irregularity in outer circumference of hot rolled coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55100926A true JPS55100926A (en) | 1980-08-01 |
Family
ID=11681236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP800579A Pending JPS55100926A (en) | 1979-01-25 | 1979-01-25 | Prevention of strength irregularity in outer circumference of hot rolled coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55100926A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5025892A (en) * | 1973-07-13 | 1975-03-18 |
-
1979
- 1979-01-25 JP JP800579A patent/JPS55100926A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5025892A (en) * | 1973-07-13 | 1975-03-18 |
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