Process and installation for continuous manufacturing of an old (over-aged) steel band having a coating of ZN, Al or ZN-Al alloy
US4530858A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 1984 |
| Grant date | Jul 23, 1985 |
| Priority date | — |
| Expiry date | May 23, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C2/29
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to a continuous coating process by a layer of Zn, Al or of a Zn-Al alloy for a cold laminated steel band comprising a heating thermic cycle, followed by a rapid cooling, a tempered coating in the metal bath of coating in fusion, at a temperature from 460.degree. to 500.degree. C., and a subsequent cooling, characterized in that after the tempered coating, the coated steel band is subjected to an over-aging treatment by maintaining the band at a temperature comprised between 430.degree. and 270.degree. C. during at least two minutes. This process is carried out in an installation comprising an over-aging chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.