Piston with tailored mechanical properties
US6202618A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1999 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Sep 23, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2253/16
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a cast piston for an internal combustion engine comprising a crown region subjected to relatively higher service temperature than other regions of the piston. The crown region has a microstructure including an alloy matrix with reinforcing material and strengthening precipitates providing strength properties suited to the higher crown service temperature by virtue of the precipitates having better resistance to averaging as compared to different strengthening precipitates formed in a microstructure of other regions of the piston subjected to lower service temperatures. The different precipitates at the other regions of the piston provide strength properties suited to relatively lower temperatures at those regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.