Abstract
It is known that steels of the R6M5 type containing over 0.1% B become brittle due to the formation of a coarse eutectic along grain boundaries. In previous works we have shown that methods of hardening from the liquid state can be used to increase the boron content in this steel to 0.5 -1 % without increasing the brittleness. A special heat treatment involving controlled transformation from an amorphous-crystalline state to a micro crystalline one made is possible to increase the ductility and cutting properties of the steel. However, the mechanism of this transformation was not considered earlier. The present article is devoted to this problem.
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 9, pp. 12 – 15, September, 1996.
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Oganyan, R.A., Oganyan, Y.N. & Roshchupkin, A.G. Structural transformations in boron-containing high-speed steel hardened from the molten state. Met Sci Heat Treat 38, 377–381 (1996). https://doi.org/10.1007/BF01395642
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DOI: https://doi.org/10.1007/BF01395642