Abstract: Poor fluidity of casting liquid of steel GCr15 mainly shows that the liquid in ladle doesn't flow out or the flow rate of liquid in nozzle of tundish is small. The steelmaking statistic data show that with increasing concasting heats average [A1] (0.01% to 0. 03% ) , decreasing [Ti] (0.003% to 0.007% ) and increasing Mn/Si (1. 45 to 1.60) in steel the fluidity of liquid increases, besides, the longer LF refining period (80 min) and lower superheating extent (25℃ ) is unfavourable to increase the fluidity of liquid. Improving the cleanliness of liquid, suitable increasing ； [Al]and Mn/Si, controlling refining time and superheating extent of liquid in tundish is effective to improve the fluidity of liquid of steel GCrl5.

摘要： GCr15连铸钢水流动性差,主要表现为钢包钢水流不出或中间包水口内钢水流量小。生产统计数据表明,随连浇炉次平均[Al](0.01%～0.03%)增加,[Ti](0.003%～0.007%)降低,Mn/Si(1.45～1.60)增加,钢水的流动性提高,此外LF精炼周期长(80 min),中间包钢水过热度低(25℃),不利于提高钢水流动性。提高钢水的洁净度,适当提高[Al]和Mn/Si,控制精炼时间和中间包钢水过热度,可有效提高GCr15钢水的流动性。

关键词: GCr15钢, 钢水流动性, 重接, 夹杂物, 中间包水口