高钛低铝特种焊接用钢浇铸稳定性研究  

Study on casting stability of special welding steel with high titanium and low aluminum

作　　者：唐庆 亓奉友 张行利 苏永泽 侯建伟 董强 Tang Qing;Qi Fengyou;Zhang Xingli;Su Yongze;Hou Jianwei;Dong Qiang(Qingdao Special Iron&Steel Co.,Ltd.,Qingdao 266000,China)

机构地区：[1]青岛特殊钢铁有限公司,山东青岛266000

出　　处：《金属制品》2024年第2期17-20,共4页Metal Products

摘　　要：高钛低铝特种焊接用钢生产难度大,生产过程不稳定。通过对连铸生产过程中出现的结鱼及结瘤物检验及理论分析,查明影响浇铸稳定性的原因主要为钢中氧氮与钛结合形成的钛类夹杂物。通过采取纯化合金、降低精炼渣中SiO_(2)活度、调整钛合金化时间等措施,提高了钢水纯净度,钢中氮质量分数由39×10^(-6)降低至28×10^(-6)、氧质量分数由29×10^(-6)降低至21×10^(-6)、钛回收率由62.5%提高到65.3%,连铸浇铸过程稳定,解决了连铸坯表面夹渣和盘条表面结疤问题。Production difficulty of high titanium and low aluminum special welding steel is high,and production process is unstable.Through physical examination and theoretical analysis of floater and nodules that occur during continuous casting production process,it is found that main reason affecting casting stability is combination of oxygen,nitrogen,and titanium in steel,forming titanium like inclusions.By adopting measures such as purifying alloys,reducing SiO_(2)activity in refining slag,and adjusting titanium alloying time,molten steel purity has been improved.Nitrogen mass fraction in steel decreased from 39×10^(-6)to 28×10^(-6),oxygen mass fraction decreased from 29×10^(-6)to 21×10^(-6),and titanium recovery rate increased from 62.5%to 65.3%.Continuous casting process was stable,and problems of slag inclusion on continuous casting billet surface and scar formation on wire rod surface were solved.

关 键 词：精炼 高钛低铝钢 焊接 浇铸 夹杂物 

分 类 号：TF769.2[冶金工程—钢铁冶金]