Patent · US Expired

Method and apparatus for the differential thermal analysis of a molten metal

US4166378A · kind A · utility

2Cited by

4References

13Claims

0Family size

Assignee

Verein zur Forderung der Giesserei-Industrie · DE

Inventors

Peter Berger
Milan Lampic · Marburg, DE
Jörg Müller · Chemnitz, DE
Kurt Orths · Ratingen, DE

Key dates

Filing date	Dec 22, 1977
Grant date	Sep 4, 1979
Priority date	—
Expiry date	Dec 22, 1997

Classification

Technology area (CPC G)Physics
CPC primaryG01N25/04
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention relates to a method for measuring the cooling curve of a test sample of metal or a metal alloy, in particular cast iron or cast steel, for the differential thermal analysis in which the difference of the cooling curve of the test sample of a fixedly given comparative curve which satisfies Newton's law of cooling (U=U.sub.0 .times.e.sup.-t/RC, the U.sub.0 parameter being the maximum value at the point in time t=0 and the RC parameter being the time constant) is formed, said comparative curve being brought to coincidence with a section of the cooling curve of the sample by adjusting its parameters so that the difference can then be formed between the adjusted comparative curve and the cooling curve.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.