Conclusions
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1.
In order to improve the tensile strength of sintered alloyed iron powder with a pearlitic structure by 50%, it is sufficient to add 1.5% Cu to the charge; the elongation is affected very little by such an addition.
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2.
The highest tensile strength is shown by alloys prepared from a charge with 1.2–1.5% graphite. After sintering these alloys consist of pearlite or pearlite with a small amount of cementite.
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Reference
P. I. Bebnev, Improved Antifrictional and Mechanical Properties of Iron-base Porous Ball Bearings (Poristye Podshipniki na Zheleznoi Osnove s Pov. Antif. i Mekh. Sv.) Collection of Papers, Proceedings of TsNIITMASh, No. 56, Mashgiz Press, 1953.
A. S. Mukhin, Experimental Works on Development of Technology for Manufacturing Automobile Parts by the Method of Powder Metallurgy at the Gorkii Auto-factory, (Sostoyanie Eksperimental'no-Issledovatel'skikh Rab. po Razr. Tekh. Izg. Avtom. Det. Met. Por. Met. na Gor. Avtozav. VNITOM Proceedings, Metallurgizdat Press, 1954.
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Gor'kii Polytechnic Institute
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Sorokin, V.K. Effect of copper and graphite on properties of sintered iron-base alloys. Met Sci Heat Treat 2, 677–678 (1960). https://doi.org/10.1007/BF01166751
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DOI: https://doi.org/10.1007/BF01166751