Method for manufacturing a metal assembly having a sheet of thermally treated aluminum to obtain alpha alumina and another sheet having surface irregularities that become embedded in said surface during roll bonding
US10392687B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 11, 2011 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | May 24, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12479
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for manufacturing a metal assembly including an aluminum sheet and at least one metal sheet. An aluminum sheet is treated by heating to a temperature of between 80% and 100% of the melting temperature of the material of which it is comprised for a sufficiently long duration to create and stabilize an alpha alumina layer at the surface of the aluminum sheet. The sheet is then cooled. A metal sheet having a ductility less than or equal to the ductility of the aluminum sheet after cooling is provided, which has surface irregularities having a depth greater than or equal to the thickness of the alpha alumina layer. The aluminum sheet and the metal sheet are roll bonded in a rolling mill to produce the metal assembly, wherein the rolling mill includes at least one cylinder, the outer rolling surface of which is provided with raised portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.