METHOD OF PRODUCING CAST GLASSCERAMIC MATERIAL Russian patent published in 2020 - IPC C03C10/00 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and resource-saving technologies, can be used to produce cast glassceramic materials, in particular, materials with high wear resistance and absorbing capacity of impact kinetic energy. Method involves preparation of a mixture containing gabbrodolerite in amount of 92–95 wt% and chromite ore beneficiation wastes in amount of 5–8 wt%, containing chromium oxide in amount of 2–10 %. Charge is melted in electric-arc smelting furnaces with water-cooled housing for 1–1.5 hours at 1,420–1,480 °C. Obtained melt is poured into molds. After molding with castings, mold is cooled at rate of 120–300 °C/min for 1.5–2 hours. Then, thermal treatment is performed in two stages: at the first stage, cooling is performed at rate of 90–110 °C/h for 4–6 hours, at the second stage cooling is performed at rate of 35–55 °C/h for 12–15 hours.

EFFECT: invention provides a glassceramic material alloy spinel-pyroxene composition and articles of wear which have range of 0_01–0_02 kg/m³, the absorption capacity of the kinetic impact energy in range of 53–55 J/cm³, crystallinity 93–96 %.

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