Method for controlling cooling of steel sheet
US7938917B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2005 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Dec 2, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D9/573
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for controlling the cooling of a steel sheet characterized by controlling the end-of-cooling temperature in a cooling process from the Ae3 or above temperature of the steel sheet, during which; preliminarily obtaining enthalpies (Hγ and Hα) of an austenite phase and ferrite phase respectively at some temperature, obtaining a gynamic enthalpy (Hsys) defined by formula (1) with an untransformed fraction (Xγ) of austenite in accordance with a target temperature pattern, predicting the temperature by using a gradient of this dynamic enthalpy with respect to temperature as a dynamic specific heat and controlling the cooling of the steel sheet:Hsys=Hγ(Xγ)+Hα(1−Xγ). formula (1)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.