Method of preparing sintered products having high tensile strength and high impact strength
US6261514A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2000 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | May 31, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C33/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention concerns a method of preparing sintered products having high tensile strength and high impact strength comprising the steps of forming a mixture by mixing an iron powder including 1-4% by weight of Cr, 0.2-0.8% by weight of Mo 0.09-0.3% by weight % of Mn, less than 0.01% of C, less than 0.25% by weight of O, 0-1.2% of graphite, a high temperature lubricant and optionally an organic binder; preparing a heated powder composition by heating the mixture to a temperature above ambient temperature; transferring the heated powder composition to a preheated die; forming a compacted body by compacting the heated powder composition in the die at an elevated temperature; and forming a sintered product by sintering the compacted body at a temperature of at least 1220.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.