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Comparison of Methods for Determining the Ferrite Content in Duplex Cast Steels

Kaňa V., Pernica V., Zadera A., Krutiš V.

Archives of Foundry Engineering

2019

iss. 2

85--90

The paper is concerned with comparing the methods for determining the ferrite content in castings from duplex stainless steels. It uses Schaeffler diagram, empirical formula based calculation, image analysis of metallographic sample, X-ray diffraction and measurement with a feritscope. The influence of wall thickness of the casting on the ferrite content was tested too. The results of the experiments show that the casting thickness of 25 or 60 mm does not have a significant effect on the measured amount of ferrite. The image analysis of metallographic sample and the measurement with the feritscope appear to be the most suitable methods. On the contrary, predictive methods, such as Schaeffler diagram or empirical formula based calculation are only indicative and cannot replace the real measurements. X-ray diffraction seems to be the least suitable measuring method. Values of ferrite content measured in such a way often deviated from the values measured by image analysis and with feritscope.

Wykorzystanie nomogramu uwzględniającego wpływ warunków spawania na zawartość ferrytu w spoinach

Słania J.

Przegląd Spawalnictwa

2003

R. 75, nr 12

15-17

Wpływ warunków stygnięcia na zawartość ferrytu w spoinach wykonanych drutami proszkowymi

Słania J.

Przegląd Spawalnictwa

2003

R. 75, nr 8

7-10