Influence of Pouring Temperature on The Formation of Spheroidal and Lamellar Graphite In Cast Iron

Year 2019, Volume: 3 Issue: 2, 124 - 130, 10.10.2019

Mehmet Ekici , Uğur Özsaraç

Abstract

The objective of this research is to investigate the effect
of pouring temperature on the microstructure of the cast iron.  The pattern was designed with 300  mm of width and the thickness variations are
25 mm and poured at five different temperatures; 1300, 1325, 1350, 1375 and
1400^oC. Several cast irons, prepared with different chemical
compositions and microstructures (three lamellar and three spheroidal
structures) have been examined by extensive mechanical testing and optical
microscopy. The fluidity of spheroidal and lamellar graphite in cast iron
increases with the pouring temperature. The numbers of nodules were decreased
by increasing pouring temperature for spheroidal structures. Whereas, the
numbers of flakes of lamellar structures changed by both pouring temperature
and chemical composition. In general, with increasing pouring temperature, the
amount of pearlite in the internal structure of both lamellar and spheroidal
graphite cast iron materials were increased.

Keywords

Spheroidal and lamellar graphite cast iron, pouring temperature, tensile test, impact test

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