Annealing process control method and apparatus
US4595427A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1984 |
| Grant date | Jun 17, 1986 |
| Priority date | — |
| Expiry date | Oct 22, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D11/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method and an arrangement for following and controlling the progress of heat treatment of cold worked metals in an annealing furnace uses the changing electrical resistivity of the cold worked metal during the annealing process as a process control parameter. A sample of the cold worked metal is placed in a slave furnace along with a sample of the cold worked metal which has been previously annealed. The temperature of the slave furnace is controlled to follow and duplicate the temperature at any point of interest in the annealing furnace, and the differential resistivity between the two samples is measured to follow and control the progress of annealing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.