Conclusions
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1.
For the practical application of the alloy MA21 it is most favorable if it has a fine-grained quasieutectic structure obtained in continuous laser treatment.
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2.
Between the power density of the radiation, the geometry of the laser track, the corrosion rate, and the volume fraction of α-phase in the alloy MA21 there exist empirical correlations.
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3.
The permissible temperature interval to which the alloy MA21 may be heated in irradiation is ΔTp=60–70°C.
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4.
To eliminate the effect of nonsteady fluxes on the process of eutectic crystallization in CLHT in air, the wall thickness of parts must not be less than 30 mm.
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5.
A method of engineering calculation of the critical mass of the irradiated part was worked out: with it the parameters of the technological process of CLHT in air can be evaluated.
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Production Association "UralAZ." Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 5, pp. 18–24, May, 1988.
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Kalimullin, R.K., Spiridonov, V.B., Berdnikov, A.T. et al. Properties of alloy MA21 after laser treatment. Met Sci Heat Treat 30, 338–348 (1988). https://doi.org/10.1007/BF00701042
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DOI: https://doi.org/10.1007/BF00701042