Compacted graphite cast iron alloy and its method of making
US6746550B1 · kind B1 · utility
3Cited by
1References
8Claims
0Family size
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Key dates
| Filing date | Jan 3, 2001 |
| Grant date | Jun 8, 2004 |
| Priority date | — |
| Expiry date | Jan 3, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C37/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing a compacted graphite iron (CGI) article, comprising the steps of: (a) providing a CGI base iron having a composition comprising, in weight percentages, about 3.2 to 3.8 total C, 2.8 to 4.0 Si and the balance at least Fe and incidental impurities; (b) treating, controlling and casting the alloy in a manner known per se; (c) allowing the cast component to cool in the mould to a temperature of at least 775° C.; (d) cleaning the casting in a manner known per se and machining the casting to produce a finished article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.