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通过热力学计算和实验室热态试验,研究了建筑用H型钢不同脱氧工艺时钢液中夹杂物形态、组成、尺寸和类型,分析了钛含量对钢中夹杂物析出行为的影响规律。在此基础上,在马钢第三钢轧总厂的建筑用H型钢生产过程中对Ti脱氧工艺进行了工业实践,并与现有工艺进行了对比。结果表明:经过Ti脱氧,钢液中全氧和溶解氧具有较低水平,钢中夹杂物尺寸小且具有良好的塑性,轧材的废品率降低,产品力学性能得到了提高。
Through thermodynamic calculation and laboratory thermal test, the morphology, composition, size and type of inclusions in molten steel for different H-shaped steel deoxidation processes were studied. The influence of titanium content on the precipitation behavior of inclusions in steel was analyzed. On this basis, the Ti deoxidation process was industrialized in the construction H-beam production process of Masteel No.3 Steel Rolling Plant, and compared with the existing technology. The results show that after Ti deoxidation, the total oxygen and the dissolved oxygen in the molten steel have a low level. The inclusion size in the steel is small and has good plasticity. The reject rate of the rolled material is reduced, and the mechanical properties of the product are improved.