Method and apparatus for predicting microstructure of cast iron
US5305815A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1992 |
| Grant date | Apr 26, 1994 |
| Priority date | — |
| Expiry date | Oct 30, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S249/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for predicting nodularity of a hypo or hyper eutectic cast iron melt during casting is described. The method is particularly useful for NiMg-treated melts but can also be used for rare earth treated melts. A small sample of the melt is poured into a sample cup to which up to 0.025% wt bismuth is added and a cooling curve is produced during cooling. In a NiMg treated melt, a .DELTA.T (TER-TEU) of at least 9.degree. C. indicates good nodularity. In an RE treated melt, a .DELTA.T of less than 6.degree. C. at a TER/TEU of 1140.degree. C. also indicates good nodularity will be observed upon the solidification of the melt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.