Method and apparatus for improved melt flow during continuous strip casting
Abstract
The continuous casting of metal strip using the melt overflow process is improved by controlling the weir conditions in the nozzle to provide a more uniform flow of molten metal across the width of the nozzle and reducing the tendency for freezing of metal along the interface with refractory surfaces. A weir design having a sloped rear wall and tapered sidewalls and critical gap controls beneath the weir has resulted in the drastic reduction in edge tearing and a significant improvement in strip uniformity. The floor of the container vessel is preferably sloped and the gap between the nozzle and the rotating substrate is critically controlled. The resulting flow patterns observed with the improved casting process have reduced thermal gradients in the bath, contained surface slag and eliminated undesirable solidification near the discharge area by increasing the flow rates at those points. 8 figures.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 7087400
- Patent Number(s):
- 5063990
- Application Number:
- PPN: US 7-543612
- Assignee:
- Armco Inc., Middletown, OH (United States)
- DOE Contract Number:
- FC07-88ID12712
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 22 Jun 1990
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; METALS; CASTING; CRUCIBLES; FLOW REGULATORS; FLUID FLOW; LIQUID METALS; TEMPERATURE GRADIENTS; CONTROL EQUIPMENT; ELEMENTS; EQUIPMENT; FABRICATION; FLUIDS; LIQUIDS; 360101* - Metals & Alloys- Preparation & Fabrication
Citation Formats
Follstaedt, D W, King, E L, and Schneider, K C. Method and apparatus for improved melt flow during continuous strip casting. United States: N. p., 1991.
Web.
Follstaedt, D W, King, E L, & Schneider, K C. Method and apparatus for improved melt flow during continuous strip casting. United States.
Follstaedt, D W, King, E L, and Schneider, K C. Tue .
"Method and apparatus for improved melt flow during continuous strip casting". United States.
@article{osti_7087400,
title = {Method and apparatus for improved melt flow during continuous strip casting},
author = {Follstaedt, D W and King, E L and Schneider, K C},
abstractNote = {The continuous casting of metal strip using the melt overflow process is improved by controlling the weir conditions in the nozzle to provide a more uniform flow of molten metal across the width of the nozzle and reducing the tendency for freezing of metal along the interface with refractory surfaces. A weir design having a sloped rear wall and tapered sidewalls and critical gap controls beneath the weir has resulted in the drastic reduction in edge tearing and a significant improvement in strip uniformity. The floor of the container vessel is preferably sloped and the gap between the nozzle and the rotating substrate is critically controlled. The resulting flow patterns observed with the improved casting process have reduced thermal gradients in the bath, contained surface slag and eliminated undesirable solidification near the discharge area by increasing the flow rates at those points. 8 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 12 00:00:00 EST 1991},
month = {Tue Nov 12 00:00:00 EST 1991}
}