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Deformation of porous materials during hot forging combined with extrusion

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Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

A study has been made of the character of the redistribution of volumes of a porous blank during hot forging with elements of extrusion; the feasibility is shown of controlling the process with the aim of ensuring that certain volumes of material occupy the required positions. It has been confirmed by experiment that the process of hot forging of porous materials with elements of extrusion involves more than one stage. The character of pressing pressure variation in various stages has been determined. In pressing in conical dies densification of central volumes of material lags slightly behind that of peripheral regions. For specimens of the geometric parameters investigated, the width of the peripheral blank zone, which in the steady-state extrusion stages moves parallel to the compressing part of the die, is (0.15–0.20)Dc. The degree of deformation and the redistribution of volumes of material in peripheral layers are affected mainly by the temperature conditions of the pressing process and to a much smaller extent by the starting blank porosity.

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Literature cited

  1. V. Yu. Dorofeev and V. I. Lozovoi,“Some features of the densification of a P/M material during hot forging with elements of extrusion,” Poroshk. Metall., No. 3, 11–14 (1985).

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Authors and Affiliations

  1. Novocherkassk Polytechnic Institute, USSR

    V. Yu. Dorofeev & I. A. Kosobokov

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  1. V. Yu. Dorofeev
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  2. I. A. Kosobokov
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Translated from Poroshkovaya Metallurgiya, No. 6(282), pp. 15–19, June, 1986.

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Dorofeev, V.Y., Kosobokov, I.A. Deformation of porous materials during hot forging combined with extrusion. Powder Metall Met Ceram 25, 455–459 (1986). https://doi.org/10.1007/BF00792377

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  • DOI: https://doi.org/10.1007/BF00792377

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