Reduction of butt curl by pulsed water flow in DC casting
US8365807B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2012 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Mar 15, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D11/049
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides a method of reducing butt curl during DC casting of a metal ingot. The ingot is cast in at least two stages, including an initial casting stage and then a steady-state casting stage carried out at higher casting speed. The emerging ingot is cooled by directing a liquid coolant onto its outer surface. During the first casting stage, the liquid coolant is directed in the form of at least two streams, including a constant first stream in the form of a series of first jets, and an intermittent second stream in the form of a series of second jets. The first and second jets impact the outer surface at locations spaced from each other peripherally and/or longitudinally of the ingot. Both the first and second streams experience film boiling when they contact the ingot. The invention includes apparatus for the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.