Conclusions
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1.
The antifriction properties of AL25 and D16 aluminum alloys can be improved by surface laser alloying to create a heterogeneous structure in the surface layer. This structure consists of hard inclusions in a soft matrix.
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2.
The required surface structure is obtained by varying the number of laser tracks and also by altering the level of heterogeneity within the hardened zones.
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3.
The excellent antifriction properties exhibited by the AL25 aluminum alloy (or D16) —45 steel grade bearing couple are obtained by laser alloying the aluminum alloy with metal disilicides, to form a heterogenous structure within the limits of each alloying zone.
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Literature cited
Yu. M. Lakhtin, Ya. D. Kogan, and V. N. Podrugin, "Laser chemical heat treatment of aluminum and aluminum based alloys", Novel Processes for Surface Hardening Metals [in Russian], TsNIITÉItyazhmash, Moscow (1982), pp. 5–7.
I. V. Bogolyubova, I. F. Deriglazova, and B. F. Mul'chenko, Laser Surface Alloying the AL25 alloy, Metalloved. Term. Obrab. Met., No. 5 (1960), pp. 24–26.
N. I. Varich and K. E. Kolesnichenko, "Influence of rapid cooling rates on the structure and properties of aluminum alloys", College Proceedings, Nonferrous Metals, No. 4 (1960), pp. 131–133.
Additional information
MADI. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 34–36, October, 1991.
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Kogan, Y.D., Sazonova, Z.S., Aleksandrov, V.D. et al. Antifriction properties of aluminum alloys after surface laser alloying. Met Sci Heat Treat 33, 772–776 (1991). https://doi.org/10.1007/BF00800698
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DOI: https://doi.org/10.1007/BF00800698