Abstract
Heavy tungsten alloy (HTA) W-Ni-Fe-Co nanopowders synthesized by a chemical-metallurgical method are used to produce a compacted material with a theoretical density and a grain size of 2.9–4.6 μm. Upon solid-phase sintering (SPS) at 1350–1450°C, the binder composition of the produced material coincides with the binder composition of the alloy fabricated by liquid-phase sintering (LPS) according to a traditional technology. The hardness of the material is 4400–3400 MPa (as compared to 1750 ± 50 and 2950 ± 50 MPa after LPS followed by a hardening treatment for a standard HTA), and its ultimate tensile strength after SPS is 950–1050 MPa (as in the case of the standard alloy after LPS). The melting temperature of the binder is 25–30°C lower than that of the traditional alloy.
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Original Russian Text © K.B. Povarova, M.I. Alymov, O.S. Gavrilin, A.A. Drozdov, A.I. Kachnov, N.L. Korenovskii, I.O. Bannykh, 2008, published in Metally, 2008, No. 1, pp. 65–69.
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Povarova, K.B., Alymov, M.I., Gavrilin, O.S. et al. Structure and properties of W-Ni-Fe-Co heavy alloys compacted from nanopowders. Russ. Metall. 2008, 52–55 (2008). https://doi.org/10.1134/S0036029508010102
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DOI: https://doi.org/10.1134/S0036029508010102