Method of preparing ultra-fine grain metallic articles and metallic articles prepared thereby
US6912885B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2002 |
| Grant date | Jul 5, 2005 |
| Priority date | — |
| Expiry date | Jul 29, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21K1/58
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus and method are provided for angularly extruding a workpiece through a die to form blanks and articles having refined grain structure. The die is also used to form the workpiece to a desired shape, such as a cylinder. The angular extrusion method can be used in place of some heat treatments, thereby lowering the cost and time for manufacturing articles. The method is compatible with materials with high strength-to-weight ratios such as aluminum, titanium, and alloys thereof. The blanks can be used to form articles having favorable mechanical properties such as strength, toughness, formability, and resistance to fatigue, corrosion, and thermal stresses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.