Nitrogen containing additive for strengthening cast iron
US3977868A · kind A · utility
3Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1975 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | Aug 4, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21C1/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A nitrogen containing additive for strengthening cast iron which contains silicon, calcium, nitrogen, at least one of chromium and manganese and the balance being iron and incidental impurities. Addition of said additive to flake graphite cast iron melt results in increase in tensile strength by 7 - 15 kg/mm.sup.2 and hardness by 20 - 60 in Brinell hardness and reduction in depth of chill due to synergistic effect of the alloying elements contained in the additive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.