马口铁等深冲冷轧基料用钢夹杂物检测分析  

Detection analysis of inclusion in tin and other materials deepdrawing cold rolled steel

作　　者：王刚 李明贤 林柱 王明慧 薛俊峰 WANG Gang;LI Ming-xian;LIN Zhu;WANG Ming-hui;XUE Jun-feng(Metallurgical Technology Department, Rizhao Steel Co., Ltd., Rizhao 276806, Chin)

机构地区：[1]日照钢铁有限公司冶金技术处

出　　处：《物理测试》2018年第2期30-34,共5页Physics Examination and Testing

摘　　要：由于马口铁产品轧制厚度薄,表面质量要求高,因此对冶炼和连铸的工艺要求更为严格。马口铁的表面缺陷,特别是孔洞缺陷,严重制约着当前马口铁系列产品产能的提高以及产品自身性能的提升。马口铁孔洞缺陷的最根本原因是由于钢水洁净度控制不佳,马口铁钢水洁净度控制技术成为马口铁生产过程的关键技术之一。通过扫描电镜、大样电解、光学显微镜等手段对其钢中夹杂物进行了检验分析,发现微观和大型夹杂物的主要组成均为Al-Ca-Mg复合氧化物夹杂物,同时发现含有钠、钾的来源于结晶器保护渣的大型夹杂。为减少夹杂的产生,采用了铝、镁、钙、钡复合脱氧替代单纯的铝脱氧及黏度较低的保护渣。For tinplate,as the rolling thickness is thin and the surface quality requirement is high,the demand for the smelting and continuous casting processes of this product becomes more stringent. The surface defects of tinplate,especially the hole defects,severely restrict the current capacity and the performance improvement of tinplate products. The primary cause of the tinplate hole defect is the poor control of the liquid steel cleanliness,which is one of the key technologies in the production process of tinplate. The inclusions in steel were examined and analyzed by the scanning electron microscopy,bulk sample electrolysis and light microscope and so on. And it was found that the main compositions of the micro and large inclusions were Al-Ca-Mg complex oxide inclusions. Meanwhile,the large inclusions containing Na and K were derived from the mold fluxes.To reduce the production of inclusions,the Al,Mg,Ca and Ba compound deoxidation was applied to substituted the pure Al deoxidization and low viscosity mould powder.

关 键 词：马口铁 冶炼 纯净度 夹杂物 

分 类 号：TG142.15[一般工业技术—材料科学与工程] TG335.12[金属学及工艺—金属材料]