Casting method for boron-phosphorus alloy cast iron
A technology of alloy cast iron and boron-phosphorus, which is applied in the field of boron-phosphorus alloy cast iron, can solve problems such as poor wear resistance and tensile resistance, reduced service life, troublesome maintenance, etc., and achieve excellent product performance, reasonable formula design, good resistance Effect of Abrasion and Tensile Properties
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[0023] Raw and auxiliary materials-pig iron, scrap steel-electric furnace smelting-tapping inoculation, flow inoculation-filtering and pouring-finished cylinder block.
[0024] In order to meet the requirements of boron-phosphorus alloy cast iron, the charge must be pure and high-quality pig iron should be selected. The impurities such as C, SI, Mn, P, S, and B in the raw materials must be controlled at the lowest level, and the content of impurity elements in the scrap steel must be controlled at the lowest level . The weight ratio per percent is: C-3.19, SI-2.24, Mn-0.79, P-0.272, S-0.082, B-0.039, Fe-94.
[0025] The electric furnace is smelted by a 12T intermediate frequency induction electric furnace. The charge is heated to 1500-1520°C. After testing, the composition is adjusted to 1450-1460°C. The pouring temperature is controlled at 1350±10°C and poured into the air compressor cylinder block.
[0026] The invention is suitable for making air compressor cylinder blocks.
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