High duty ductile cast iron with superplasticity and its heat treatment methods
US4096002A · kind A · utility
8Cited by
9References
9Claims
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Key dates
| Filing date | Jun 4, 1975 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Jun 4, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S420/902
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A spheroidal graphite cast iron containing some carbide stabilizing elements to have the maximum strain rate sensitivity factor of more than 0.3 and having very refined grain matrix structure, so that having an improved toughness at room temperature and having a matrix which is composed of fine austenite and fine ferrite grains and superplastic properties at the temperature between the eutectoid transformation temperature range and 50.degree. C higher than that temperature range; and the method of heat treatment to obtain the said spheroidal graphite cast iron.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.