Composite immersion nozzle
US6321953A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1998 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Feb 4, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2495
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a composite immersion nozzle, by which it is possible to reduce thermal stress on the nozzle and to prevent occurrence of cracks, whereby there is no restriction on properties of the materials such as thermal expansion coefficient, while fully utilizing properties required for each of the materials such as corrosion resistant property, property to prevent alumina build-up on the nozzle, etc. In an immersion nozzle comprising two types or more of materials, a material having higher thermal expansion coefficient than that of the nozzle main body is arranged on inner side of the nozzle, and a ratio of thickness of the material arranged on the inner side to total thickness of the nozzle is less than 25%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.