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进行了钙处理变性含硫非调质钢中夹杂物的工业试验,通过SEM+EDS定性研究钢中夹杂物类型随工序的变化,得到钙处理对夹杂物演变的影响。针对硫化物夹杂的形态控制,用牛津INCA能谱仪Feature工具的自动扫描夹杂物功能定量分析钙处理前后钢中硫化物夹杂的类型、数量和尺寸的变化。研究结果表明,钙处理能够增加钢中复合硫化物数量,尤其是含钙复合硫化物,从而有利于降低轧材中长条状硫化物的比例,形成较多的球状或纺锤状硫化物,改善钢材的各向异性。进一步分析钙处理改性硫化物的作用机理,在不影响钢材机械性能前提下,钙处理适当降低钢液洁净度有利于含硫非调质钢中硫化物的形态控制,工业生产中采用钙处理的方法来进行硫化物的形态控制是可行的。
The industrial experiment of calcium treatment of inclusions in denatured sulfur-free quenched and tempered steel was carried out. The influence of calcium treatment on the evolution of inclusions was obtained by SEM + EDS. Aiming at the morphology control of sulfide inclusions, the change of the type, number and size of sulfide inclusions in steel before and after calcium treatment were quantitatively analyzed by the automatic scanning inclusion function of the Oxford INCA energy spectrum Feature Tool. The results show that calcium treatment can increase the amount of complex sulfides in steel, especially calcium-containing composite sulfides, which is beneficial to reduce the proportion of long strip sulfide in the rolled material and to form more spherical or spindle-shaped sulfides and improve Steel anisotropy. Further analysis of the mechanism of calcium treatment of modified sulfide, without affecting the mechanical properties of steel under the premise of calcium treatment to reduce the cleanliness of molten steel is conducive to sulfur-containing non-quenched and tempered steel sulfide morphology control, industrial production of calcium treatment Method for sulfide morphology control is feasible.