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2 Archives of Foundry Engineering

2 2009

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Influence of spheroidal cast iron wall thickness on its microstructure and ultrasonic control index

Orłowicz W., Tupaj M., Mróz M., Guzik E., Gierut E., Pilut W., Zimowski A.

Archives of Foundry Engineering

2009

Vol. 9, iss. 1

125-128

This work presents results of ultrasonic evaluation of the microstructure of spheroidal cast iron manufactured under production conditions. Evaluation of the ultrasonic control index's sensitiveness to changes in microstructure (graphite shape index Ss and average number of graphite precipitations NA) of cast iron, was made on modelled stepped castings. A relation between the graphite precipitation shape index Ss and the velocity of longitudinal ultrasonic wave cL has been defined, as well as a relation between the average number of graphite precipitations NA and the velocity of longitudinal ultrasonic wave cL.

Defining the relation between tensile strength and ultrasonic wave velocity in spheroidal cast iron manufactured in the foundry JAFAR S.A.

Orłowicz W., Tupaj M., Mróz M., Guzik E., Gierut E., Pilut W., Zimowski A.

Archives of Foundry Engineering

2009

Vol. 9, iss. 1

129-132

This work presents results of ultrasonic evaluation of mechanical properties of spheroidal cast iron manufactured under the production conditions of FA JAFAR S.A.. Tests were conducted on wedge casts which were used as samples for tensile strength tests, a map of distribution of longitudinal ultrasound wave velocity was determined for the cast wedges. The tensile strength tests were conducted and values of longitudinal ultrasound wave velocity were determined in the place where the sample was broken. Relations between the tensile strength and the velocity of longitudinal ultrasonic wave cL were determined.