Conclusions
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1.
Treatment of the liquid phase of ingots with a pulsating submerged jet in the process of solidification reduces the depth of penetration of shrinkage defects; this makes it possible to reduce the weight of the riser by 15–20%.
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2.
In an ingot subjected to pulsation the zone of columnar crystals becomes shorter, the zone of equiaxial crytals becomes more homogeneous, and eccentric liquation is also shifted from the zone solidifying directly under pulsation; this may be regarded as one way of controlling the formation of the macrostructure of forging ingots.
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3.
In the metal of the head part of the experimental ingot the steel is less polluted by nonmetallic inclusions than in the control ingot. The greatest difference is a characteristic feature of the zone solidifying directly in the process of pulsation.
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Donetsk Polytechnic Institute; VNIIPVtortsvetmet. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 7, pp. 21–22, July, 1991.
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Smirnov, A.N., Bychkov, Y.B., Chernobaeva, T.V. et al. Quality of forging ingots of low alloy steel pulsation treated in solidification. Met Sci Heat Treat 33, 508–512 (1991). https://doi.org/10.1007/BF00778650
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DOI: https://doi.org/10.1007/BF00778650