Metallurgical composition of particulate materials, self-lubricating sintered products and process for obtaining self-lubricating sintered products
US9243313B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 9, 2009 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Jan 21, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12014
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The metallurgical composition includes a main particulate metallic material, for example iron or nickel, and at least one alloy element for hardening the main metallic material, which form a structural matrix; a particulate solid lubricant, such as graphite, hexagonal boron nitride or mixture thereof; and a particulate alloy element which is capable of forming, during the sintering of the composition conformed by compaction or by injection molding, a liquid phase, agglomerating the solid lubricant in discrete particles. The composition may include an alloy component to stabilize the alpha-iron matrix phase, during the sintering, in order to prevent the graphite solid lubricant from being solubilized in the iron. The invention further refers to a self-lubricating sintered product, obtained from the composition, and to the process for obtaining said product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.