摘要
针对10B21含硼钢(/%:0.18-0.23C,≤1.0Si,0.60-0.90Mn,≤0.025P,≤0.020S,≥0.015Alt,≥0.008B)盘条表面铁皮疤缺陷及连铸坯角部表面裂纹进行了分析,通过优化钢的成分控制(/%:0.020-0.050Alt,0.03-0.05Ti,≤0.0060N,0.0008-0.0012B)提高拉速至2.3-2.4m/min以保证铸坯过拉矫时温度≥980℃,采取将连铸二冷比水强度由原1.29L/kg降至1.05L/kg等措施,可以有效控制连铸坯角部表面裂纹的出现,轧制后的盘条表面铁皮疤缺陷率由原来的15%降到1%以下。
According to analysis on the scab defects on the surface of 10B21 boron-containing steel(/%:0.18-0.23C,≤1.0Si,0.60-0.90Mn,≤0.025P,≤0.020S,≥0.015Alt,≥0.008B)wire rod and the surface cracks on the corners of continuous casting billet,by optimizing the composition control of steel(/%:0.020-0.050Alt,0.03-0.05Ti,≤0.0060N,0.0008-0.0012B),increaseing the drawing speed to 2.3-2.4 m/min to ensure the through stretching and straightening temperature of the slab≥980℃;by reducing the specific water strength of the secondary cooling of continuous casting from original 1.29 L/kg to 1.05 L/kg,etc,that can effectively control the corner crack on the surface of continuous casting billet,the scale defect rate is declined from the original 15%to less than 1%after the rolled wire rod.
作者
陈修君
毕胜
周伟基
姚玉东
王鑫
CHEN Xiujun;BI Sheng;ZHOU Weiji;YAO Yudong;WANG Xin(Chief Engineer Office of Dongbei Special Steel Co Ltd;Dongbei Special Steel Co Ltd,Dalian,116000)
出处
《特殊钢》
2022年第4期63-65,共3页
Special Steel
关键词
含硼冷镦钢
10B21
合金成分
表面裂纹
工艺优化
Boron Cold Heading Steel 10B21
Alloy Elements Content
Surface Crack
Process Optimization
作者简介
陈修君(1979-),男,高级工程师,2006年内蒙古工业大学(本科)毕业,炼钢工艺研究。E-mai:chenxiujun@dtsteel.com。
