The use of chromium white cast irons in place of traditionally used austenitic steel 110G13L makes it possible to increase significantly the service life of fast-wearing parts of crushing and grinding equipment [1]. The rational selection of the optimal composition and heat-treatment conditions of wear-resistant cast irons is hampered to a considerable extent by the absence of reliable methods of predicting the phase composition, structure of the matrix, degree of stability of retained austenite, and effect of these factors on the formation of the dissipative structure of the working surface layer of castings with a high capacity for hardening under the action of abrasive particles during their service and, as a consequence, for maximum abrasive wear resistance. The purpose of the present work was to study the effect of the phase composition of the metal matrix of chromium cast iron before and after tests for hardening of the working surface and abrasive wear resistance.
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