439中铬超纯铁素体不锈钢冷轧板表面线缺陷分析和夹杂物控制  

Improve and Analysis of the Line Defect on Surface of Cold-Rolled 439 Medium Chromium Ultra-Pure Ferritic Stainless Steel Sheet

作　　者：周清 ZHOU Qing(Jiuquan Iron and Steel(Group)Co.Ltd.,Jiayuguan 735100,China)

机构地区：[1]酒泉钢铁(集团)有限责任公司,甘肃嘉峪关735100

出　　处：《甘肃冶金》2024年第6期120-122,126,共4页Gansu Metallurgy

摘　　要：采用电子探针能谱分析了439中铬超纯铁素体不锈钢冷轧板表面线缺陷的特征及成因。检测结果表明铝镁尖晶石夹杂物是导致线缺陷产生的主要原因。VOD形成了大量镁铝尖晶石夹杂物,精炼过程喂入硅钙线可以得到理想的钙处理效果,Al_(2)O_(3)-MgO夹杂物转变为CaO-Al_(2)O_(3)-MgO-SiO_(2)夹杂物。The character and cause of sliver defect on 439 medium chromium ultra-pure ferritic stainless steel sheet surface are studied by means of EDS.The results show that the line defect is caused by Al_(2)O_(3)-MgO inclusion.In the 439 steel melt,Al_(2)O_(3)-MgO inclusion is easily formed during VOD.When calcium silicon line is added during LF,it can get ideal calcium treatment effect,the Al_(2)O_(3)-MgO inclusions change into CaO-Al_(2)O_(3)-MgO-SiO_(2)inclusions.

关 键 词：439不锈钢 线缺陷 夹杂物 VOD 

分 类 号：TG142.71[一般工业技术—材料科学与工程]