Conclusions
White cast iron powder rapidly quenched from the liquid condition with presence of the same phases and structural components differs markedly in structure from normally cast white iron.
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2.
With an increase in cooling rate vcool during solidification the amount of eutectic decreases. However, with an increase in carbon content this tendency is weakened and with 3.9% the structure of powder cast iron is almost entirely of eutectic.
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3.
An increase in vcool leads to a marked reduction in the dimensions of eutectic colonies and the eutectic component itself and also to refinement of primary carbide precipitates in hypereutectic cast irons.
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4.
Austenite formed as a result of rapid solidification from the liquid condition is supersaturated with carbon.
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Literature cited
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Additional information
I. P. Bardin Institute of Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 34–35, January, 1991.
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Gulyaev, A.P., Astakhov, S.I. Structural features of atomized white cast iron powder. Met Sci Heat Treat 33, 56–60 (1991). https://doi.org/10.1007/BF00775038
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DOI: https://doi.org/10.1007/BF00775038