JPS5684104A - Rolling method for press-fixing porosity defect of steel billet - Google Patents
Rolling method for press-fixing porosity defect of steel billetInfo
- Publication number
- JPS5684104A JPS5684104A JP15993279A JP15993279A JPS5684104A JP S5684104 A JPS5684104 A JP S5684104A JP 15993279 A JP15993279 A JP 15993279A JP 15993279 A JP15993279 A JP 15993279A JP S5684104 A JPS5684104 A JP S5684104A
- Authority
- JP
- Japan
- Prior art keywords
- thickness
- rolling
- porosity defect
- pass
- 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.)
- Pending
Links
Landscapes
- Metal Rolling (AREA)
Abstract
PURPOSE: To prefectly press-fix the porosity defect of the steel billet, by performing the rolling work according to the pass schedule possible to eliminate thickness of the porosity defect remaining in the steel sheet after the rolling work in a size represented by the formulas including the draft percentage and the shape ratio of the rolled sheet.
CONSTITUTION: At manufacturing the steel sheet by rolling the steel ingot or continuously cast steel ingot, the rolling work is performed according to the rolling pass schedule based on the formulas I and II for making the thickness dk of the porosity defect remaining in the steel sheet after the rolling work to be dk≤0; in said formulas I and II, H0 is thickness of steel ingot or continuously cast ingot, Hj is thickness after the j-th pass, Hk is thickness after completing the rolling work (after the k-th pass), d0 and w0 are respectively thickness and breadth of the porosity defect included in the steel ingot or continuously cast ingot, mj is the shape ratio of rolled sheet obtianed by j-th pass, R is radius of the rolling roll of the mill, dk is thickness of the porosity defect remaining in the steel sheet after completing the rolling work (after the k-th pass), and (a,b,c) are respectively a constant. By the present metod, the porosity defect is perfectly press-fixed through the rolling work.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15993279A JPS5684104A (en) | 1979-12-10 | 1979-12-10 | Rolling method for press-fixing porosity defect of steel billet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15993279A JPS5684104A (en) | 1979-12-10 | 1979-12-10 | Rolling method for press-fixing porosity defect of steel billet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5684104A true JPS5684104A (en) | 1981-07-09 |
Family
ID=15704293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15993279A Pending JPS5684104A (en) | 1979-12-10 | 1979-12-10 | Rolling method for press-fixing porosity defect of steel billet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5684104A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0347916A (en) * | 1989-07-14 | 1991-02-28 | Kawasaki Steel Corp | Production of thick steel plate |
| JPH0375315A (en) * | 1989-08-18 | 1991-03-29 | Nippon Steel Corp | Production of thick nonoriented silicon steel plate having uniform magnetic property in plate-thickness direction |
-
1979
- 1979-12-10 JP JP15993279A patent/JPS5684104A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0347916A (en) * | 1989-07-14 | 1991-02-28 | Kawasaki Steel Corp | Production of thick steel plate |
| JPH0375315A (en) * | 1989-08-18 | 1991-03-29 | Nippon Steel Corp | Production of thick nonoriented silicon steel plate having uniform magnetic property in plate-thickness direction |
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