钢中硫化物是影响钢材性能的重要因素,作者用实验装置研究了钢水中的S与硫化物形态控制元素之间的平衡关系,进行了反应平衡常数的计算。对于大型钢锭添加稀土元素控制硫化物形态的适当条件的研究指出,实验证明加稀土元素(RE)量达(％RE)/(％S)=3时大致可完全控制钢中的硫化物形态,但实际上在钢锭上往往出现明显的稀 Sulfide in steel is an important factor affecting the properties of steel. The author studied the equilibrium relationship between S and sulfide in the molten steel using experimental equipment, and calculated the equilibrium constant of the reaction. The research on the appropriate conditions for controlling the morphology of sulfide by adding rare earth elements to large ingots indicates that the experimental results show that the addition of rare earth elements (RE) / (% S) = 3 can completely control the sulfide morphology in steel, But in fact often appear obvious thin slab