Method for zone heat treatment of a metallic workpiece
US4743309A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 1986 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Dec 15, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/25
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for zone heat treatment of metallic workpiece with a comparatively large cross-section, in which the workpiece is successively passed through a zone of higher temperature in such a way that the temperature of the workpiece initially rises steeply as a function of the displacement in the feed direction, passes through a flat maximum and then falls with a small slope. The method is carried out by passing the workpiece through a heating device equipped with a heating coil and a subsequent insulation body, or alternatively through a furnace. In a special embodiment of the method for obtaining the highest possible temperature gradient, the workpiece is drawn from a water bath and then passed through the heating coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.