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在无增压的大功率船用柴油机的大尺寸气缸件铸中,随含碳量增至3.6％,铸铁的磨损减小,但其抗拉强度明显下降。研究了铜对适用于气缸铸件(重量7吨,最大磨损区壁厚～85毫米)的高碳量(3.4～3.5％)的铸铁的抗拉强度和耐磨性的影响。铁水在60公斤的铬镁炉衬的MTΠ—52型感应电炉中熔炼。炉料组成:生铁Л346％,生铁Л49％,废钢25％,回炉料20％,用硅铁合金、碎电极及铜
In non-pressurized high-power marine diesel engine large-size cylinder casting, with the carbon content increased to 3.6%, the wear of cast iron decreases, but its tensile strength decreased significantly. The effect of copper on the tensile strength and wear resistance of cast iron with high carbon content (3.4-3.5%) suitable for cylinder casting (weight 7 tons, wall thickness 85 mm maximum wear zone) was investigated. Molten iron was melted in a MTΠ-52 induction furnace of a chromium-magnesium furnace lining of 60 kg. Burden composition: pig iron Л346%, pig iron Л49%, 25% scrap, 20% back to the charge, with ferrosilicon alloy, broken electrodes and copper