FIELD: process engineering.
SUBSTANCE: invention relates to abrasive grain mix bonded by inorganic binder. Mix structure is formed by multiple abrasive grains. Note here that abrasive grain is selected from the group consisting of corundum, fused corundum, sintered corundum, zirconium corundum, silicon carbide, boron carbide, cubic boron nitride, diamond and/or mixed thereof, and bonded by inorganic binder. Said binder is based on aluminium silicate, liquid glass and water. Note here that molar ratio of Al2O3 components to those of SiO2 in binder varies from 1:2 to 1:20. Proposed method comprises mixing abrasive grains with binder, drying produced mix at 100°C - 150°C and curing the mix at 200°C to approx. 450°C.
EFFECT: highest possible hardness.
18 cl, 3 dwg, 2 tbl, 3 ex
