Author： Coccìa G. Lecis N. Albricci G. Dovera R.
Publisher： Edp Sciences
E-ISSN： 1156-3141|99|12|1027-1032
ISSN： 0035-1563
Source： Revue de Métallurgie, Vol.99, Iss.12, 2010-03, pp. : 1027-1032
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Abstract
In this paper an extension of the sintering method at atmospheric pressure, already used for tool steels, is proposed for prealloyed duplex stainless steel powders. A wide temperature range is tested and the effectiveness of boron as activator of the process is investigated. In all the samples no evidence of liquid phase is observed ; the sintering process allows full density in case of no boron addition and it occurs by solid phase diffusion, enhanced by the presence of two phases, austenite and ferrite : this makes needless to add boron as activator. We obtain density and hardness values comparable with the “as-cast” ones, isotropic phases structure and
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