Abstract: A heat transfer model for steel 37Mn5  Φ210 mm round bloom casting is established by software ANSYS to study the effect of casting speed 1. 3 ~ 1. 5 m/min, liquid overheating extent 15° ~ 60° and secondary cooling water rate 0. 58 ~ 0. 78 L/kg during casting bloom heat transfer process on casting bloom surface temperature, bloom solidified shell thickness and solidification end position. Results show that controlling stable lower casting speed, low liquid overheating extent and weaker secondary cooling water rate are available to avoid the formation of crack of steel 37Mn5 Φ210 mm bloom and improve the metallurgy quality of bloom.

摘要： 通过ANSYS软件建立了37Mn5钢Φ210 mm圆坯连铸的传热模型,研究了在铸坯传热过程中铸机拉速1.3~1.5 m/min,钢水过热度15°~60°,二冷比水量0.58~0.78 L/kg对铸坯表面温度、凝固坯壳厚度和凝固终点位置的影响。结果表明,控制稳定的较低拉速、低过热度、较弱二冷比水量可有效地避免37Mn5钢Φ210mm铸坯裂纹的形成,提高铸坯的冶金质量。

关键词: Φ210 mm圆坯连铸, 37Mn5钢, 传热模型, 拉速, 钢水过热度, 二冷比水量, 裂纹, 冶金质量