Abstract
The flowing capacity and relative poured density (RPD) of different fractions of original gas-sprayed high-speed steel powders and those treated in rolls as well as the strength of compacts prepared from them are studied. It is established that with this treatment powder particles are mainly broken down, and their flowability and RPD decrease. The ultimate RPD for treated powders with which quite strong compacts are obtained under normal cold pressing conditions is about 0.45.Compacts with satisfactory processing characteristics are obtained from powders with a RPD below 0.45. A relative poured density of 0.45 may serve as a production criterion of the suitability of powders that are difficult to deform for normal compaction.
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Translated from Poroshkovaya Metallurgiya, Nos. 11–12(446), pp. 3–9, November–December, 2005.
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Gogaev, K.A., Radchenko, A.K. & Gogaeva, T.K. Increase in the formability of powders that are difficult to deform. Powder Metall Met Ceram 44, 517–522 (2005). https://doi.org/10.1007/s11106-006-0018-9
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DOI: https://doi.org/10.1007/s11106-006-0018-9