used, the graphite parameters are similar or slightly bet- ter than for the 0.18 wt-% Ca-FeSi treatment. On the other hand, 0.04 wt-% [Ca-FeSi + OS-IE Enhancer] appears to be at least as effective at the same in-mould addition rate as the Ca,REE-FeSi alloy, which was particularly noticed for Heat B (<0.01%REEres


). (a)


Ductile Iron Production Without Rare Earth Element Additions


Inoculation comparisons were made between Ca-bearing, foundry-grade 75% ferrosilicon (FeSi75) and a proprietary complex alloy, based on oxy-sulphide chemistry, 40


to deter- (b)


(c)


(d)


(e)


(f)


(g)


(h)


parameters, in tested ductile irons [a, c, e, g – Heat A; b, d, f, h – Heat B] [En – inoculant enhancer]. Figure 6. Influence of the distance from the apex [W3 International Journal of Metalcasting/Volume 8, Issue 2, 2014 73


wedge samples, ASTM A367] on the graphite phase selected


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