METHOD OF PRODUCING WEAR-RESISTANT WHITE IRON Russian patent published in 2011 - IPC B22D1/00 C21C1/08 

FIELD: process engineering.

SUBSTANCE: invention may be used for production of abrasion-proof parts, e.g. ball mill grinding ball, wear-resistant lining, detachable parts of oil-and-gas production equipment. White iron of the following chemical composition is fused in the furnace, in the following ration of components, in wt %: carbon- 3.4-4; silicon 1.0-1.2; manganese - 0.3-0.8; chromium - 0.8-1.0; nickel - 0.05-0.15; copper - 0.8-1.5; vanadium - 0.05-0.10; brimstone - 0.01-0.20; phosphorus -0.10-0.20, iron making the rest. Cast iron is poured into teeming ladle wherein cast iron is modified by boron-containing and cerium-containing rich alloys, magnesium in amount of 0.03-0.06 % and carbon nano-modifying agent in amount of 0.001-0.002% of melt weight. Produced castings are subjected to bainite hardening at the rate of 2°C/s to 45°C/s to 250°C to 350°C with subsequent cooling in air.

EFFECT: higher wear and resistance and impact strength, reduced costs, simplified process.

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