Grain refinement of hadfield steel by the addition of hafnium (HF)

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Abstract:

This paper presents the effect of controlled addition of Hf and deoxidation with Al for reducing the austenitic grain size of Hadfield steel (12 % Mn, 1.2 %C and 0.65 % Si). Macrostructural characterization showed that the Hf-treated cast Hadfield steel showed a mean grain size of 340 µm and the Al/Hf-treated Hadfield a mean grain size of 280 µm, while the reference condition presented a mean grain size of 2000 µm. Particles of Al2O3 and HfC were found in the EDS / MEV analyzes indicating that they can act as a substrate for the nucleation of austenite.

Reference:
VENTURELLI, Bianka Nani; ALBERTIN, Eduardo; MARTORANO, Marcelo de Aquino. Grain refinement of hadfield steel by the addition of hafnium (HF). In: ABM WEEK, 6.; MELTING, REFINING & CASTING, 51., 7-9 jul., 2022, São Paulo. Proceedings…. 13p.

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