Abstract
1. Alloying additions of 0.17–2.33% Mo in cast irons considerably improves (particularly in contact with quartz sand) their abrasive wear resistance. This is due to the improved resistance of their martensite matrix and carbides to brittle fracture when in contact with abrasive grains. 2. Alloying additions of vanadium decrease the abrasive wear resistance of cast irons. This is related to the negative influence of vanadium on the brittle fracture resistance of the chromium carbides in which vanadium dissolves intensively. 3. Alloying additions of niobium improve the abrasive wear resistance of the cast irons to some degree, due to the formation of special niobium carbides.
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