钢中氧含量对硫化物夹杂种类和形态的影响

Effect of oxygen content on the types and forms of sulfide inclusions in steel

主要研究了钢中氧含量与硫化物夹杂物的种类和形态之间的关系,以控制合适的氧含量,从而提高线材的切削性能,对15个炉次的冶炼过程及其成品取样,分析氧含量对硫化物夹杂的成分、形态及切削性能的影响。结果表明:钢中硫化物与氧化物形成的复合夹杂物的比例会随着氧含量的增加而变大,硅、铝、钙氧化物为核心,外围包裹MnS或CaS的纺锤形或球形复合夹杂对提高切削性能非常有利,应保证成品线材中的氧的质量分数不低于0.0140%。

The relationship between the oxygen content and the types and forms of the sulfide inclusions was mainly studied for the suitable oxygen content control to improve the cutting performance of wire. Smelting process samples and finished samples were taken in fifteen heats. The influences of the oxygen content on compositions and forms of the sulfide inclusions and the cutting performance were analyzed. The results showed that the proportion of sulfide and oxide composite inclusions in steel rose with the increase of the oxygen content. The spindly or spherical composite inclusions surrounded by MnS or CaS,and with the core of silicon oxide,aluminum oxide and calcium oxide,could improve significantly the cutting performance. It should ensure that the mass fraction of oxygen of finished wire was not less than 0. 0140 %.