Iron-based sintered material and production method thereof
US8038761B2 · kind B2 · utility
3Cited by
5References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 21, 2008 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Aug 7, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12014
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
There is provided an iron-based sintered material resistant to the metal fatigue developing from the voids therein functioning as the initial points and improved in the strength and machinability thereof. An iron-based sintered material, including a mixed structure of martensite, bainite, and pearlite and multiple voids formed in the mixed structure, wherein the ratio of martensite and bainite in the mixed structure is 70% or more; the ratio of martensite and/or bainite in the mixed structure forming the void surface is 90% or more; and the density of the iron-based sintered material is 7.4 g/cm3 or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.