Control of Transverse Corner Cracks on Low-Carbon Steel Slabs

被引：34
|
作者：
Zhang, Lifeng [1 ]
Yang, Xiaogang [1 ]
Li, Shusen [1 ,2 ]
Li, Ming [1 ,2 ]
Ma, Wei [1 ,2 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing Key Lab Green Recycling & Extract Met GRE, Beijing 100083, Peoples R China
[2] Qianan Steelmaking Co Ltd, Shougang Grp, Qianan City 064404, Peoples R China
来源：
JOM | 2014年 / 66卷 / 09期
基金：
美国国家科学基金会;
关键词：
HOT-DUCTILITY; PHASE-TRANSFORMATION; CAST STEEL; NB; TI; MICROSTRUCTURE; BEHAVIOR; SURFACE; BORON; MN;
D O I：
10.1007/s11837-014-1112-y
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this article, the formation mechanism of transverse corner cracks on a low-carbon steel continuous-casting slab was investigated. The factors influencing the transverse corner cracks were discussed. The hot ductility of the low-carbon steel within 600A degrees C and 1250A degrees C was detected using a thermal simulator Gleeble 1500 (Dynamic Systems, Inc., Poestenkill, NY) to determine the embrittling temperature range of the steel. The temperature of the slab varied with time, especially at the slab corner, and it was calculated and discussed. It was found that transverse corner cracks were generated on the ferrite films along grain boundaries, and there was little decarburization layer near the cracks. According to the calculated temperature at slab corner, the cooling water flow rate and cooling strategy were optimized by adjusting the cooling water flow rate at each spray cooling zone to avoid the embrittling temperature range at the bending and straightening segments of the caster. As a result, the transverse corner cracks were successfully weakened.
引用
收藏
页码：1711 / 1720
页数：10
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