Abstract
Alloying of sintered steel with the aim of improving its mechanical properties and enabling it to be heat treated has been dominated by the elements cooper, nickel and molybdenum, individually or in combination. These elements pose no extra requirements on the oxygen potential control of the sintering atmosphere, but their effects on solution strengthening and increase in hardenability (with the exception of expensive molybdenum) are low, compared with the alloying elements manganese and chromium, commonly used in wrought steels.
Alloying of sintered steel with chromium has recently become a practical process which requires the sintering temperature to be increased to 1250 °C, however, alloying by manganese, whose affinity for oxygen considerably exceeds that of chromium, is not considered feasible in industrial practice.
It will be shown that despite the low position of the Mn line in Ellingham diagram, alloying with manganese during sintering is not only possible at conventional sintering temperatures, but it contributes to the sintering process by two additional mechanisms: the transport of material through the gaseous phase, and diffusion-induced grain boundary migration.
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© 1987 Plenum Press, New York
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Navara, E. (1987). Sintering of Iron Powder with an Addition of Ferromanganese. In: Kuczynski, G.C., Uskoković, D.P., Palmour, H., Ristić, M.M. (eds) Sintering’85. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2851-3_38
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DOI: https://doi.org/10.1007/978-1-4613-2851-3_38
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