Conclusions
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1.
A study was made of some characteristics of penetration of molten cobalt in sintered hard alloys. It is shown that, for liquid phase migration under conditions similar to those prevailing in a semiinfinite rod, the distribution of cobalt along the specimen length is described by a relationship close to linear.
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2.
It was found that hard alloys have their “limit of impregnation” with the liquid phase, which corresponds to a cobalt content of about 32 wt.%.
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3.
The relationship has been determined between the thickness of the layer of increased γ phase content and the time of contact between a hard alloy and a cobalt melt.
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Literature cited
M. M. Babich, V. K. Bogatyrev, et al., in: Diamond and Hard Alloy Tools in Mining [in Russian], Tekhnika, Kiev (1965).
A. F. Lisovskii and Yu. P. Linenko, Poroshkovaya Met., No. 3 (1972).
A. F. Lisovskii, in: Wettability and Surface Properties of Melts and Solids [in Russian], Naukova Dumka, Kiev (1972).
V. I. Tret'yakov, Sintered Hard Alloys [in Russian], Metallurgizdat, Moscow (1962), p. 39.
W. D. Jones, Fundamental Principles of Powder Metallurgy, Edward Arnold, London (1960).
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Translated from Poroshkovaya Metallurgiya, No. 6 (138), pp. 76–79, June, 1974.
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Lisovskii, A.F., Bondarenko, V.P., Vishnevskii, A.S. et al. Kinetics of penetration of molten cobalt into hard alloys. Powder Metall Met Ceram 13, 496–498 (1974). https://doi.org/10.1007/BF00791977
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DOI: https://doi.org/10.1007/BF00791977