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为了减少42CrMoA曲轴钢精炼过程中CaO-SiO2-Al2O3系夹杂物对其基体损伤的影响,利用Factsage软件计算了42CrMoA曲轴钢中CaO-SiO2-Al2O3系低熔点夹杂物的成分,并根据钢液-夹杂物,钢液-精炼渣之间的平衡,计算分析了CaO-SiO2-Al2O3系夹杂物控制在塑性区域内所需的钢液成分及对精炼渣的要求。结果表明:CaO-SiO2-Al2O3系夹杂物存在两个变形良好的控制区域。区域1对应的精炼渣成分由于碱度过低在生产中受到极大限制,区域2要求的精炼渣成分往往会发生偏离。建议向精炼渣中配加适量的CaF2和MgO,以将CaO-SiO2-Al2O3三元系夹杂物转变为四元或多元系夹杂物。
In order to reduce the influence of CaO-SiO2-Al2O3-based inclusions on the matrix damage of 42CrMoA crankshaft during refining, the compositions of CaO-SiO2-Al2O3-based low-melting inclusions in 42CrMoA crankshaft steel were calculated by Factsage software. Inclusions, molten steel - refined slag between the calculated CaO-SiO2-Al2O3-based inclusions in the control of the plastic region of molten steel composition and refining slag requirements. The results show that there are two well-controlled deformation zones in the CaO-SiO2-Al2O3 inclusions. The refining slag components for Zone 1 are extremely limited in production due to too low alkalinity, and the slag components required for Zone 2 tend to deviate. It is advisable to add appropriate amounts of CaF2 and MgO to the refining slag to convert CaO-SiO2-Al2O3 ternary inclusions into quaternary or multi-element inclusions.