含Ti焊丝钢钢水可浇性的研究与控制措施

Research and Control Measures for Steel Casting of Welding Wire Steel with Ti

永锋淄博有限公司钢轧厂于2015年开始试制高附加值含Ti焊丝钢,但在连铸生产过程中,钢水可浇性差,出现严重的水口"套眼"现象,连浇炉次仅为1、2炉。针对造成水口"套眼"的典型夹杂物类型系统检测与产生机理的研究,通过优化生产过程中各项工艺,有效控制钢中[Ti]/[Al]^(4/3)>84.49、[Ti]·[N]≤3.5×10^(-3)%、钢中[O]含量以及抑制固态二氧化硅或是固溶体富硅酸锰类夹杂物产生条件,尽最大可能降低含Ti焊丝钢水口"套眼"产生的可能性,目前含Ti焊丝钢连浇炉数可达5炉以上。

In order to further seize the market share of high end welding wire, Zhang Gang steel rolling mill began to produce high value added Ti welding wire steel in 2015. But in the procedure of continuous casting production, due to the poor pouring of molten steel, there exist a serious pouring nozzle blocking phenomenon. The casting furnace is only 1 or 2.Therefore, the research on the detection and generation mechanism of the typical inclusion type system in the serious nozzle blocking is carried out. By optimizing the process of the production, in steel the [Ti]/[Al]^4/3〉 84.49, [Ti]·[N]≤3.5×10^-3% can be effective control. The content of [O] in steel and the suppression of solid silicon dioxide or the conditions for the formation of manganese silicate inclusions in solid solution, the possibility of reducing serious nozzle blocking of the steel gate with Ti welding wire is reduced as far as possible. By nowadays, the continuous casting heats with Ti welding wire steel is up to 5 heats.