Method and device for reaction control
US11339450B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2016 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | Feb 16, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/25
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for controlling surface reactions on a steel strip running through a furnace includes, successively, a first section, a second section, and a third section separated by a sealing element, an atmosphere in the second and third sections being oxidizing and reducing respectively, the method including: heating, in the first section, the steel strip to between 600 and 750° C., while causing the atmosphere therein to be slightly oxidizing and to include: an H2 content inferior to 2%; an O2 content inferior to 0.1%; an H2O or CO2, or H2O+CO2 content superior to 0.03%; a controlled dew point ranging from −50 to −15° C.; and a controlled concentration of CO+CO2 maintained below 2%. All percentages are expressed in terms of volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.