JPS54106061A - Blooming method for killed steel - Google Patents
Blooming method for killed steelInfo
- Publication number
- JPS54106061A JPS54106061A JP1369778A JP1369778A JPS54106061A JP S54106061 A JPS54106061 A JP S54106061A JP 1369778 A JP1369778 A JP 1369778A JP 1369778 A JP1369778 A JP 1369778A JP S54106061 A JPS54106061 A JP S54106061A
- Authority
- JP
- Japan
- Prior art keywords
- ingot
- rolling
- steel
- central zone
- carried out
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/02—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/026—Rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
PURPOSE:To improve the yield of the blooming, by processing as follows; the steel ingot is charged into the soaking pit while the riser and a part of main body of the killed steel in the mold are at the unsolidified state, and after the surface of the ingot is fast heated at a specified speed of temperature rise, the ingot is dragged out at a limited condition, and then, the bottom rolling is carried out at a strong reduction in the latter half of the rolling pass schedule. CONSTITUTION:The rapping is carried out at the time t1', when the riser and a part of main body of the killed steel in the mold 1 on the bed plate 3 are at the unsolidified state 4, and the ingot is charged into the soaking pit at the time t2'. Then, the surface of steel ingot is fast heated at the speed of temperature rise 200- 500 deg.C/H, and the ingot is dragged out at the condition that the central zone of ingot is completely solidified and the internal temperature is more than 150 deg.C higher than the surface temperature (the time t3'-t4'). After that, while the blooming is carried out, the bottom rolling is performed at a strong rolling reduction in the latter half of the rolling pass schedule. Hereby, the degree of penetration of rolling reduction into the central zone of the steel ingot is improved, so that the strethch at the central zone becomes larger, and the cut-off percentage of the top of the steel ingot is reduced as compared with the conventional method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1369778A JPS54106061A (en) | 1978-02-08 | 1978-02-08 | Blooming method for killed steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1369778A JPS54106061A (en) | 1978-02-08 | 1978-02-08 | Blooming method for killed steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54106061A true JPS54106061A (en) | 1979-08-20 |
| JPS5612363B2 JPS5612363B2 (en) | 1981-03-20 |
Family
ID=11840378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1369778A Granted JPS54106061A (en) | 1978-02-08 | 1978-02-08 | Blooming method for killed steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54106061A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008237439A (en) * | 2007-03-27 | 2008-10-09 | Matsushita Electric Works Ltd | Dishwasher |
| JP2008237438A (en) * | 2007-03-27 | 2008-10-09 | Matsushita Electric Works Ltd | Dishwasher |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10313597A1 (en) | 2003-03-26 | 2004-10-07 | BSH Bosch und Siemens Hausgeräte GmbH | Cooking oven has an electronic display panel that indicates cooking duration and has a pictogram that indicates the state of the oven, especially whether it is turned on or not |
| DE10313596A1 (en) | 2003-03-26 | 2004-10-07 | BSH Bosch und Siemens Hausgeräte GmbH | Cooking oven has a display panel that is controlled so that icons, corresponding to particular oven operating modes, are illuminated when the oven is being used in a particular mode |
-
1978
- 1978-02-08 JP JP1369778A patent/JPS54106061A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008237439A (en) * | 2007-03-27 | 2008-10-09 | Matsushita Electric Works Ltd | Dishwasher |
| JP2008237438A (en) * | 2007-03-27 | 2008-10-09 | Matsushita Electric Works Ltd | Dishwasher |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5612363B2 (en) | 1981-03-20 |
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