Cast iron alloy and method of making the same
US6613274B2 · kind B2 · utility
2Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 22, 2002 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | May 22, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C33/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides a cast iron alloy comprising 3.0-3.8% carbon, 06-25% silicon, 0.2-0.65% manganese, 0.01-0.1% tin, <0.025% sulfur, 0.001-0.020% magnesium, 0.1-1.2% copper, 0.04-0.2% chromium, and balance up to 100% of iron and incidental impurities. The matrix structure is a continously variable ferrite/pearlite mixture and the content of carbides is less than 1%. The graphite shape of the alloy is 1 50% flake graphite, 50-99% compacted graphite and at most 10% spheroidal graphite. Such an alloy is easier to machine and less prone to shrinkage than an ordinary compacted graphite cast iron.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.