Molten metal immersion probe
US5577841A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 6, 1995 |
| Grant date | Nov 26, 1996 |
| Priority date | — |
| Expiry date | Feb 6, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S73/09
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An immersion probe for determining a liquidus temperature of a molten metal sample during solidification has a first refractory body with an immersion face, an interior sample chamber, and a passageway between the immersion face and an end wall of the chamber. A heat sink is positioned within the chamber adjacent the end wall and an insulating shield is positioned within the chamber adjacent the heat sink, each having an aperture corresponding to the inlet tube. The insulating shield sinks thermal energy from within the chamber at a second rate R.sub.2 slower than a first rate R.sub.1 of the interior walls of the chamber. A liquidus temperature sensor is positioned within the chamber away from the insulating shield. To determine the liquidus temperature, the probe is immersed in the molten metal, and a molten metal sample flows into the chamber through the passageway. When the flow ceases, the heat sink solidifies an adjacent portion of the molten metal and seals the sample within the chamber. The sealed sample solidifies along a solidification front that progresses toward the insulating shield. Accordingly, gaseous voids are prevented from being formed adjacent the sensor while th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.