Process of aluminization of sheets of magnetic steel with oriented grains
US5123976A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1991 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Jan 28, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/1272
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process of aluminizing magnetic steel sheets is disclosed. The process involves annealing a steel sheet in order to achieve partial secondary recrystallization, providing aluminum on the steel sheet, preferably by vacuum evaporation or immersion, and subjecting the steel sheet to a further heat treating step in order to diffuse the aluminum into the sheet and decrease impurities therein. Preferably, the partial secondary recrystallization anneal is performed in a neutral atmosphere such as nitrogen, while the final heat treating step is performed in a hydrogen atmosphere, and at a higher temperature than the above annealing step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.