Liner for submerged entry nozzle
US5370370A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1993 |
| Grant date | Dec 6, 1994 |
| Priority date | — |
| Expiry date | Feb 19, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/0087
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A fired carbon-bonded, oxide refractory body for use in casting aluminum-killed steel has a metal contacting surface which is resistant to both steel erosion and buildup of alumina. The layer is formed by first firing the pressed body in an oxidizing atmosphere to form a porous oxidized zone on selected steel contacting surfaces. The remaining surface portions of the body are protected against oxidation during firing by a glaze applied prior to firing. A carbon free refractory slip or slurry is infiltrated into the porous oxidized zone to create the erosion and buildup resistant surface layer. A preferred infiltrant material is alumina.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.