Tailored Liquid Phases for Enhanced Sintering of Advanced PM - Steels

Stefan Geroldinger; Raquel de Oro Calderon; Christian Gierl-Mayer; Herbert Danninger

doi:10.4028/www.scientific.net/MSF.1016.470

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HomeMaterials Science ForumMaterials Science Forum Vol. 1016Tailored Liquid Phases for Enhanced Sintering of...

Tailored Liquid Phases for Enhanced Sintering of Advanced PM - Steels

Abstract:

The application of “masteralloys” as alloying carriers in Powder Metallurgy (PM) steels enables the introduction of highly oxygen‑sensitive alloying elements for advanced PM‑steels, by using a tailored liquid phase. The characteristics of the liquid and its interaction with the iron base powder are determining factors for final microstructure and dimensional behaviour. In this study, theoretical calculations and experimental findings are presented for the masteralloy systems Fe_Mn_Si_C, Fe_Cr_Si_C and Fe_Mn_Cr_Si_C. Lowered melting temperatures and narrow melting temperature intervals could be achieved. The interaction between Fe base material and the masteralloys was studied by infiltration and DTA experiments. It was found that by adjusting the C and Si content in the masteralloy, liquids with widely varying properties could be obtained. This might be a key for tailoring microstructures, properties and dimensional stability of advanced PM‑steels.

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Periodical:

Materials Science Forum (Volume 1016)

Pages:

470-475

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1016.470

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Online since:

January 2021

Authors:

Stefan Geroldinger*, Raquel de Oro Calderon, Christian Gierl-Mayer, Herbert Danninger

Keywords:

Liquid Phase Sintering, Low Alloyed Steel, Master Alloy, Oxygen Sensitive Alloying Elements, Powder Metallurgy

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