Features of the deformation of sintered porous billets during orbital forging are considered. A schematic of an orbital forge with a roller as a punch is shown. To study orbital forging processes, cylindrical samples made of iron powder and its mixture with 1% of graphite compacted under 550, 700, and 850 MPa and sintered at 1150°C were used. The variation of the relative density and radial strain of billets during orbital forging with the axial strain and the variation of the strain with the shape factor of porous billets are described. It is shown that the total force of orbital forging is much lower (by a factor of 3.0–4.5) than the load needed to form similar billets by conventional free upsetting.
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Translated from Poroshkovaya Metallurgiya, Vol. 53, No. 9–10 (499), pp. 33–41, 2014.
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Baglyuk, G.A., Kurikhin, V.G. & Gozhii, S.P. Orbital Forging of Sintered Porous Billets. Powder Metall Met Ceram 53, 522–528 (2015). https://doi.org/10.1007/s11106-015-9646-2
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DOI: https://doi.org/10.1007/s11106-015-9646-2