CSP流程薄规格热轧带钢氧化铁皮控制技术

Control technology of oxide scale for thin gauge hot rolled strip in CSP process

为了研究主要工艺参数对热轧带钢表面氧化铁皮的影响,基于CSP生产线开展了工业试验。试验结果表明,带钢的厚度规格对氧化铁皮厚度有重要影响,并且由于供氧的差异,带钢宽度方向氧化铁皮厚度的分布不均匀;通过调整终轧温度和层流冷却方式,可以减小氧化铁皮厚度,但效果并不明显;降低卷取温度,有利于促进Fe O共析反应的发生,提高α-Fe＋Fe_3O_4的体积分数,室温下氧化铁皮的附着力也得到一定程度的改善;带钢宽度方向上氧化铁皮结构存在区别,中部Fe O的共析反应更为充分。

In order to study the influence of the main process parameters on the oxide scale of hot rolled strip,the nidustry experiment was carried out on the basis of CSP production line.The results show that the thickness of the strip has an important influence on the thickness of the oxide scale,and the thickness of oxide scale is unevenly distributed along the width of the stripdue to the difference of oxygen supply.By adjusting the final rolling temperature and laminar cooling method,the thickness of oxide scale can be reduced,but the effect is not obvious.Decreasing the coiling temperature is beneficial to promote the occurrence of eutectoid reaction of Fe O,increase the ratio of α-Fe＋Fe_3O_4,and improve the adhesion of oxide scale at room temperature.The distribution of oxide scales in the width of strip is uneven,and the eutectoid reaction of Fe O in the middle is more adequate.