JPS54128964A - Reverse rolling method for steel ingot - Google Patents
Reverse rolling method for steel ingotInfo
- Publication number
- JPS54128964A JPS54128964A JP3766078A JP3766078A JPS54128964A JP S54128964 A JPS54128964 A JP S54128964A JP 3766078 A JP3766078 A JP 3766078A JP 3766078 A JP3766078 A JP 3766078A JP S54128964 A JPS54128964 A JP S54128964A
- Authority
- JP
- Japan
- Prior art keywords
- steel ingot
- reverse
- spread
- pass
- distribution
- 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
- 229910000831 Steel Inorganic materials 0.000 title abstract 7
- 238000005096 rolling process Methods 0.000 title abstract 7
- 239000010959 steel Substances 0.000 title abstract 7
- 238000000034 method Methods 0.000 title abstract 2
- 238000005259 measurement Methods 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
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
Abstract
PURPOSE:To cancel the spread at the top portion, and to improve the yield, in case of the reverse rolling of steel ingot, by placing on top the high temperature layer of steel ingot, by carrying out the rolling work at a ratio of distribution of total rolling reduction into forward and reverse passes determined according to a special method. CONSTITUTION:The high temperature side of the steel ingot 4 to be rolled is placed on top, and the steel ingot 4 is directed upward by an angle alpha, and is bitten into rolls 5, 6; meantime, the expective amount of spread S2 for the reverse pass is obtained (from the graph made by practical measurement) according to the temperature difference between the upper layer and the lower layer divided at an imaginary plane perpendicular to the reducing direction of the steel ingot 4; on the other hand, the ratio of distribution of total rolling reduction (into the forward pass and the reverse pass) is obtained from the relation between the initial feed angle alpha of the steel ingot 4 and the expective spread S1 for the forward pass (from the practical measurement stated separately). The spread S1 and S2 are canceled by carrying out the rolling depending on the ratio of distribution of total rolling reduction into forward pass and reverse pass, determined so as to make S1 = S2; and the defects 2 in the material is reduced, so that the yield is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3766078A JPS54128964A (en) | 1978-03-30 | 1978-03-30 | Reverse rolling method for steel ingot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3766078A JPS54128964A (en) | 1978-03-30 | 1978-03-30 | Reverse rolling method for steel ingot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54128964A true JPS54128964A (en) | 1979-10-05 |
Family
ID=12503788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3766078A Pending JPS54128964A (en) | 1978-03-30 | 1978-03-30 | Reverse rolling method for steel ingot |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54128964A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62282701A (en) * | 1986-04-30 | 1987-12-08 | Nippon Kokan Kk <Nkk> | Rolling method for ingot |
| CN107847992A (en) * | 2016-05-13 | 2018-03-27 | 新日铁住金株式会社 | Broadening milling method and broadening rolling device |
| JP2020104135A (en) * | 2018-12-27 | 2020-07-09 | 株式会社神戸製鋼所 | Pure titanium plate manufacturing method |
-
1978
- 1978-03-30 JP JP3766078A patent/JPS54128964A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62282701A (en) * | 1986-04-30 | 1987-12-08 | Nippon Kokan Kk <Nkk> | Rolling method for ingot |
| CN107847992A (en) * | 2016-05-13 | 2018-03-27 | 新日铁住金株式会社 | Broadening milling method and broadening rolling device |
| JP2020104135A (en) * | 2018-12-27 | 2020-07-09 | 株式会社神戸製鋼所 | Pure titanium plate manufacturing method |
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