260 mm×300 mm连铸坯内裂纹的分析和改进工艺实践

特殊钢 ›› 2007, Vol. 28 ›› Issue (1): 53-54.

260 mm×300 mm连铸坯内裂纹的分析和改进工艺实践

李法兴¹, 兰新哲¹, 宋永辉¹, 孙永喜²

1西安建筑科技大学，西安710055;
2莱芜钢铁股份有限公司，莱芜271105

收稿日期:2006-07-11 出版日期:2007-01-01 发布日期:2023-01-16
作者简介:李法兴(1978-),男，在读研究生，从事钢铁冶炼工艺研究。

Analysis and Improved Process Practice on Internal Crack of 260 mm×300 mm Concasting Billet

Li Faxing¹, Lan Xinzhe¹, Song Yonghui¹, Sun Yongxi²

1 Xian Architecture and Technology University,Xian 710055;
2 Laiwu Iron and Steel Co Lad,Laiwu 271105

Received:2006-07-11 Published:2007-01-01 Online:2023-01-16

摘要/Abstract

摘要： 通过控制钢中硫含量≤0.020%,不同炉次中间包钢水温度波动范围由25 ℃降至10 ℃,调整结晶器水量为190~200m³/h,控制拉速0.55~0.75 m/min, 使20CrMnTiH 、40Cr、GCr15等钢种260 mm×300 mm连俦坯的内裂废品率由0.30%降低到0.01%,基本消除了铸坯内裂纹。

关键词: 260 mm×300 mm连铸坯, , 内裂纹, 铸速, , 中间包钢水温度

Abstract: With controlling sulphur content in steel≤0.020%,temperature fluctuation range of molten steel of df- ferent heat in tundish decreasing to 10 ℃ from original 25 ℃,adjusting mold water rate to 190～200 m³/h,controling casting rate0.55~0.75 m/min,the intemal crack reject rate for 260 mm×300 mm cast billet of steel 20CrMnTiH, 40Cr, CCr15 etc decreased to 0.01% from original 0.30%,in order to basically eliminate the intemal crack in cast billet.

Key words: 260 mm×300 mm Concasting Billet, Intemal Crack, Casting Rate, Molten Steel Temperature in Tundish

李法兴, 兰新哲, 宋永辉, 孙永喜. 260 mm×300 mm连铸坯内裂纹的分析和改进工艺实践[J]. 特殊钢, 2007, 28(1): 53-54.

Li Faxing, Lan Xinzhe , Song Yonghui, Sun Yongxi. Analysis and Improved Process Practice on Internal Crack of 260 mm×300 mm Concasting Billet[J]. Special Steel, 2007, 28(1): 53-54.