Large forging manufacturing process
US6409853B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1999 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Oct 25, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A process for forging large components of Alloy 718 material so that the components do not exhibit abnormal grain growth includes the steps of:a) providing a billet with an average grain size between ASTM 0 and ASTM 3;b) heating the billet to a temperature of between 1750° F. and 1800° F.;c) upsetting the billet to obtain a component part with a minimum strain of 0.125 in at least selected areas of the part;d) reheating the component part to a temperature between 1750° F. and 1800° F.;e) upsetting the component part to a final configuration such that said selected areas receive no strains between 0.01 and 0.125;f) solution treating the component part at a temperature of between 1725° F. and 1750° F.; andg) aging the component part over predetermined times at different temperatures.A modified process achieves abnormal grain growth in selected areas of a component where desirable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.