JPS56156714A - Rolling method for high-tenacity steel - Google Patents
Rolling method for high-tenacity steelInfo
- Publication number
- JPS56156714A JPS56156714A JP5991180A JP5991180A JPS56156714A JP S56156714 A JPS56156714 A JP S56156714A JP 5991180 A JP5991180 A JP 5991180A JP 5991180 A JP5991180 A JP 5991180A JP S56156714 A JPS56156714 A JP S56156714A
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- temperature
- thickness
- steel slab
- composition according
- 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
- 238000005096 rolling process Methods 0.000 title abstract 8
- 229910000831 Steel Inorganic materials 0.000 title abstract 5
- 239000010959 steel Substances 0.000 title abstract 5
- 238000000034 method Methods 0.000 title 1
- 229910045601 alloy Inorganic materials 0.000 abstract 2
- 239000000956 alloy Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 230000009466 transformation Effects 0.000 abstract 2
- 229910001566 austenite Inorganic materials 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000013213 extrapolation Methods 0.000 abstract 1
- 238000005098 hot rolling Methods 0.000 abstract 1
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
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
PURPOSE:To control rolling behavior correctly by hot rolling a steel slab containing <=0.3wt% and alloy elements adjusted in composition according to the purpose controlling the rolling by calculated average temperature through the thickness by using the thickness of material and career of rolling to become to that thickness as factors. CONSTITUTION:A steel slab containing <=0.3wt% C and alloy elements adjusted in composition according to the purpose is soaked to above 900 deg.C and hot-rolled. At this time, the change of temperature during the rolling process of the steel slab is grasped in the average temperature through the thickness Tm. In calculating temperature by heat transmission based upon rolling data to the steel slab, actual temperature of transformation is estimated by deviation of actually measured temperature from temperature calculated by extrapolation making the values of propperty of material in the austenite domain as data after equilibrium transformation. Then, rolling pattern is so made that the pass holding time from immediately before Tm reaches Ar3' to starting of pass is within 15 seconds, and the total rolling reduction (r) from a temperature higher than Ar3' by 100 deg.C to Ar3 becomes 10% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5991180A JPS56156714A (en) | 1980-05-08 | 1980-05-08 | Rolling method for high-tenacity steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5991180A JPS56156714A (en) | 1980-05-08 | 1980-05-08 | Rolling method for high-tenacity steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56156714A true JPS56156714A (en) | 1981-12-03 |
Family
ID=13126773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5991180A Pending JPS56156714A (en) | 1980-05-08 | 1980-05-08 | Rolling method for high-tenacity steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56156714A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59200723A (en) * | 1983-04-26 | 1984-11-14 | Nippon Steel Corp | Method for manufacturing high-strength steel sheets with excellent toughness |
-
1980
- 1980-05-08 JP JP5991180A patent/JPS56156714A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59200723A (en) * | 1983-04-26 | 1984-11-14 | Nippon Steel Corp | Method for manufacturing high-strength steel sheets with excellent toughness |
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