Abstract
The production conditions and mechanical and tribotechnical properties of iron–high-carbon ferrochrome FKh800 materials doped with nickel boride have been studied. It is shown that Ni3B additions promote the formation of a multiphase microheterogeneous matrix-reinforced structure consisting of chromium steel and solid inclusions of complex chromium–iron carbides such as Me7C3 and Me23C6. When the doping content increases from 3.5 to 7.0 wt.%, complex Fe–Cr carbides and carboborides form, decreasing the hardness and bending strength and increasing the abrasive wear resistance of the base material from 5.0 to 12.2 km/mm. The Fe–35% FKh800 materials containing 5–7 wt.% Ni3B are found to be promising as they combine acceptable mechanical properties and improved abrasive wear resistance.
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