化学成分体系对无取向硅钢夹杂物控制的影响 ·1·

化学成分体系对无取向硅钢夹杂物控制的影响

张 峰 缪乐德 吕学钧 王 波 朱简如

（宝山钢铁股份有限公司硅钢部，上海 200941）

摘 要 结合工业化生产的无取向硅钢，采用非水溶液电解 + 扫描电镜观察方法，探讨了化学成分体系对夹杂物控制的影响。结果表明， 随着 Si、Al 元素含量升高，氧化物夹杂数量明显减少。氮化物夹杂数量先是快速增多、而后逐渐减少。与此同时，夹杂物平均尺寸逐渐变大。低 Al 状态下，硫化物夹杂数量较多；高 Al 状态下，硫化物夹杂数量明显减少，而且 CuxS 夹杂消失。高 Si、低 Al 系列，中 Si、低 Al 系列，低 Si、无 Al 系列，高 Si、高 Al 系列夹杂物数量依次减少。

关键词 无取向硅钢 化学成分体系 非金属夹杂物 非水溶液电解

Effects of Chemical Composition Systems on Non-metallic Inclusions in

Non-oriented Silicon Steel Sheets

Zhang Feng Miu Lede Lv Xuejun Wang Bo Zhu Jianru

(Silicon Steel Department, Baoshan Iron & Steel Co., Ltd., Shanghai, 200941)

Abstract Based on the industrial production of non-oriented silicon steel, the method of nonaqueous solution electrolysis and scanning electron microscope was used to research the effects of chemical composition systems on non-metallic inclusions was studied. The results showed that, the amounts of oxide inclusions of finished steel sheets was decreased obviously with the increase of silicon concentration and aluminium concentration. The amounts of nitride inclusions increased sharply with the increase of silicon concentration and aluminium concentration, and then decreased. Meanwhile, the average size of inclusions of finished steel sheets was getting large. There were a great many sulphide inclusions under low aluminium concentration, then the CuxS inclusions disappeared and the sulphide inclusions decreased obviously under high aluminium concentration. The amounts of inclusions of finished steel sheets gradually decreased according to the gradition of high Si and low Al, middle Si and low Al, low Si and without Al, and high Si and high Al.

Key words non-oriented silicon steel, chemical composition system, non-metallic inclusions, nonaqueous solution electrolysis

无取向硅钢的磁性能主要取决于铁素体的晶粒尺寸、晶体织构和钢中的夹杂物[1]。工业化生产过程中，一般形成不了明显的织构。因此，铁素体的晶粒尺寸、钢中的夹杂物，成为影响无取向硅钢磁性能的主要因素。尤其是钢中的夹杂物，它们的存在不仅抑制晶粒长大、促使晶格畸变，还会阻碍磁畴运动，进而劣化无取向硅钢的磁性能[2]。因此，生产过程中，希望尽可能的将其去除或使其无害化。

降低 C、S、O、N 有害元素含量[3~5]，或者采用稀土[6]、钙处理[7]方法，可以去除钢中的夹杂物；Mn 元素含量升高，夹杂物尺寸比例分布得到改善，小颗粒 MnS 夹杂物粗化[2以促进夹杂物聚合、上浮、去除[9,10]。

本文结合工业化生产的无取向硅钢，探讨了不同 Si、Al

含量化学成分体系对夹杂物控制的影响，以期

、8]

；向钢中添加 Sn、Sb 元素，可