The maximum abrasive wear resistance is provided by metal base from metastable retain austenite and martensite. Such a microstructure of chromium cast irons, 260Kh16M2 and 250Kh25MFT with different types of carbides - Cr7C3 and Cr23C6, is created by high-temperature quenching with heating to temperatures of 1125-1170 °C and cooling in oil or air. Austenite is transformed to disperse martensite on the working surface as a result of the abrasive particles impact during operation. It and carbides provide a high hardening level and working capacity of the cast irons secondary microstructure.