METHOD OF PRODUCING DUCTILE IRON
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United States of America Patent
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Jul 16, 2012
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Jul 25, 2006
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Abandoned
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Abstract
The present invention relates to a process for the production of ductile iron comprising the sequential steps of:—(i) treating liquid iron with an initialiser comprising an effective amount of a group IIa metal other than Mg, (ii) at a predetermined time after step (i), treating the liquid iron with a magnesium containing nodulariser, (iii) treating the liquid iron with a eutectic graphite nucleation-inducing inoculant, and (iv) casting the iron. The invention allows for the variability of oxygen content in the base iron to be processed such that the mechanical properties of components cast from the processed iron are independent of the original oxygen content of the base iron.
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