Sintered powdered ferrous alloy article and process for producing the alloy article
US4021205A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 8, 1976 |
| Grant date | May 3, 1977 |
| Priority date | — |
| Expiry date | Jun 8, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C33/0207
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A sintered powdered ferrous alloy article having high heat and abrasion resistances and a high workability is produced by admixing, (1) 5 to 30% by weight of a finely divided component alloy which consists of the following composition, ______________________________________ 1 to 4% by weight carbon 10 to 30% by weight chromium 2 to 15% by weight nickel 10 to 30% by weight molybdenum 20 to 40% by weight cobalt 1 to 5% by weight niobium the balance iron, ______________________________________ (2) 0.8 to 2% by weight of finely divided carbon and (3) the balance of a finely divided ferrous base metal, compression molding the admixture under a pressure of 4 to 6 metric tons/cm.sup.2 and sintering the molded admixture in a reducing atmosphere at a temperature of 1050.degree. to 1150.degree. C, the resultant alloy article comprising a matrix component formed from the finely divided carbon and ferrous base metal, numerous particles of the finely divided component alloy dispersed in the matrix and bounding phases formed, around the particles of the finely divided component alloy, from a portion of the matrix and portions of the finely divided component alloy diffused into the portions of th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.