| 摘要 |
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 2C/s to 45C/s to 250C to 350C with subsequent cooling in air. ^ EFFECT: higher wear and resistance and impact strength, reduced costs, simplified process. ^ 4 tbl, 1 ex |
