JPS5668567A - Enrichment of alloying element to the surface layer of continuously casted cast steel piece - Google Patents
Enrichment of alloying element to the surface layer of continuously casted cast steel pieceInfo
- Publication number
- JPS5668567A JPS5668567A JP14513479A JP14513479A JPS5668567A JP S5668567 A JPS5668567 A JP S5668567A JP 14513479 A JP14513479 A JP 14513479A JP 14513479 A JP14513479 A JP 14513479A JP S5668567 A JPS5668567 A JP S5668567A
- Authority
- JP
- Japan
- Prior art keywords
- depth
- alloying elements
- angle
- outlet
- molten 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
- Continuous Casting (AREA)
Abstract
PURPOSE: To enrich alloying elements at the surface of cast steel piece and to improve characteristics of products, by turning the outlet of immersion nozzle of mold downward and by immersing adding material of alloying elements at shallow depth in the molten steel.
CONSTITUTION: At the continuous casting, the angle between molten steel outlet 18 of immersion nozzle 16 to the mold and the horizontal plane is adjusted to turn 5W35° downward, and, at the same time, adding material 10 containing alloying elements to be added dispersely is immersed into the molten steel at a depth of 30W100mm so that the adding material will not touch sheel 8. The reason why such limits are decided in angle and depth is that, when the angle of outlet 18 is smaller than that of the specified one, the density of alloying elements will become less except at the very surface. On the other hand, when the angle becomes larger, the density of alloying elements becomes higher or lower locally. Moreover, when the immersing depth is deepened, the alloying elements will be dissolved before reaching a desired depth, and when the depth is shallower, the amount to be added becomes less and dissolving speed is not uniform.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14513479A JPS5668567A (en) | 1979-11-08 | 1979-11-08 | Enrichment of alloying element to the surface layer of continuously casted cast steel piece |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14513479A JPS5668567A (en) | 1979-11-08 | 1979-11-08 | Enrichment of alloying element to the surface layer of continuously casted cast steel piece |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5668567A true JPS5668567A (en) | 1981-06-09 |
Family
ID=15378187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14513479A Pending JPS5668567A (en) | 1979-11-08 | 1979-11-08 | Enrichment of alloying element to the surface layer of continuously casted cast steel piece |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5668567A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0760408A (en) * | 1993-08-24 | 1995-03-07 | Nippon Steel Corp | Production of steel plate for thin sheet |
JPH07178521A (en) * | 1993-12-22 | 1995-07-18 | Nippon Steel Corp | Production of thin steel plate having extremely good surface characteristic |
JPH07284879A (en) * | 1994-04-20 | 1995-10-31 | Nippon Steel Corp | Production of continuously cast slab |
JPH07290195A (en) * | 1994-04-21 | 1995-11-07 | Nippon Steel Corp | Production of continuously cast slab |
-
1979
- 1979-11-08 JP JP14513479A patent/JPS5668567A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0760408A (en) * | 1993-08-24 | 1995-03-07 | Nippon Steel Corp | Production of steel plate for thin sheet |
JPH07178521A (en) * | 1993-12-22 | 1995-07-18 | Nippon Steel Corp | Production of thin steel plate having extremely good surface characteristic |
JPH07284879A (en) * | 1994-04-20 | 1995-10-31 | Nippon Steel Corp | Production of continuously cast slab |
JPH07290195A (en) * | 1994-04-21 | 1995-11-07 | Nippon Steel Corp | Production of continuously cast slab |
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