Method for controlling the composition of a cast iron melt
US6102981A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1998 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Sep 16, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N25/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for controlling the composition of a cast iron melt is presented. A cast iron melt is prepared which has added to it a structure modifying agent and a nucleating agent in amounts selected to produce a fully compacted graphite iron upon solidification of the melt. A sample vessel, having an inner wall having an active portion coated with a material which will lower the concentration of dissolved modifying agent and an inert portion, is used to extract a sample of the melt. Three temperature measuring devices are used to measure temperatures at three locations within the melt. One measuring device measures the temperature at the center of the vessel, one measures the temperature at the inert portion of the vessel's inner surface and one measures the temperature at the active portion of the vessel's inner surface. In another aspect of the invention, two sample vessels are used, one having an active surface and the other having an inert surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.