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Title: 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:
; ;
Publication Date:
OSTI Identifier:
7087400
Patent Number(s):
US 5063990; A
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 = {1991},
month = {11}
}