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摘要: 对江苏沙钢集团有限公司RH处理W470无取向硅钢脱氧工艺进行了优化研究。试验结果表明,RH终点钢水w(T.O)由(20~30)×10-6降至(15~20)×10-6,硅和锰氧化量减少,含SiO2、MnO类大尺寸复合夹杂的数量大幅度减少;铸坯中大尺寸复合夹杂数量进一步减少,电镜观察20 μm以上夹杂物数量及最大夹杂物尺寸均大幅度降低;但由于顶渣T.Fe含量偏高,对钢水存在一定的二次氧化,铸坯中小尺寸Al2O3类夹杂数量依然较多。此外,工艺优化后,合金中硅和锰元素的收得率均有所提高。
关键词: 无取向硅钢, RH脱氧工艺, 高铝质夹杂, 二次氧化
Abstract: The process of RH deoxidization of W470 non-oriented silicon steel was optimized in Shasteel. The results showed that the total oxygen content of liquid steel at RH end was reduced from (20-30)×10-6 to (15-20) ×10-6. Due to reducing the oxidation of silicon and manganese during the alloying process, the inclusions containing SiO2 and MnO reduced rapidly. The inclusion density of slab and the largest size of inclusion observed by SEM decreased by a large margin. As a result of the secondary oxidation of liquid steel caused by the ladle slag, there was still a large number of inclusions with small size. Besides, the yield of silicon and manganese increased evidently.
Key words: non-riented silicon steel, RH deoxidization process, high aluminum inclusion, secondary oxidation
赵家七,邹长东,马建超,耿 涛. RH脱氧工艺优化对W470无取向硅钢洁净度的影响[J]. 炼钢.
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链接本文: http://journal05.magtechjournal.com/Jwk3_gt/lg/CN/
http://journal05.magtechjournal.com/Jwk3_gt/lg/CN/Y2015/V31/I4/21