Treatment for improving the castability of aluminum killed continuously cast steel
US6685763B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2001 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Sep 12, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21C7/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
According to this treatment, calcium is added to ultra low molten steel or low carbon which is aluminum killed (or in the course of being killed) in order to form non-metallic deoxidation inclusions that have a melting point which is below the casting temperature; the molten metal is maintained in the chain of treatment ranging from the ladle refining installation to the copper mold with a low minimum low magnesium content of approximately 2 ppm. The inventive method increases the scope of fusibility of the inclusionary population of steels, thereby improving the castability of high aluminum-killed ultra low carbon grades without the need for argon bubbling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.