Conclusions
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1.
Optimum conditions have been determined for the deposition of protective nickel and nickel-phosphorus coatings on the particles of atomized iron powder and for the subsequent heat treatment of the powder designed to produce nickel- and phosphorus-rich surface diffusion layers.
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2.
It has been established that nickel and nickel-phosphorus coatings in the form of 10–15Μ thick diffusion layers decrease the oxidation of atomized iron powder in air and water vapor atmospheres at 300–500‡C by a factor of 2 to 6. Maximum surface strengthening is induced by the deposition of a nickel-phosphorus coating.
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3.
It is shown that aluminized iron powders could prove useful as ferromagnetic powders for EPC; the possibility has been established of producing iron powders aluminized to a depth of 10–15Μ.
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S. A. Vishenkov and E. V. Kasparova, Electroless Nickel Plating as a Means of Increasing the Reliability and Useful Life of Machine Components [in Russian], Mashgiz, Moscow (1963).
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Translated from Poroshkovaya Metallurgiya, No. 3 (135), pp. 28–34, March, 1974.
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Putimtsev, B.N., Pakhlevanyan, L.I. Surface strengthening of ferromagnetic powders for electromagnetic powder clutches. Powder Metall Met Ceram 13, 197–201 (1974). https://doi.org/10.1007/BF00790634
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DOI: https://doi.org/10.1007/BF00790634