摘要
分析了低合金钢连铸坯热装轧制时钢板表面晶界裂纹缺陷产生的原因。根据入炉前铸坯表面温度及相应的冷却制度,进行了工业试验。试验结果表明,入炉前铸坯表面温度小于450℃或大于750℃时不产生晶界裂纹。采取下线冷却工艺后,低合金钢厚铸坯轧后的晶界裂纹从原来的27.3%降低到0。
The causes leading to grain boundary cracks occurred on the surface of low alloy steel sheets by rolling hot charging continuous casting slabs are analyzed. Industrial experiments are carried out according to the surface temperature of the slabs prior to entering the reheating furnace and the corresponding cooling schedule. The testing results show that the cracks can be avoided when the surface temperature of the slabs prior to entering the reheating furnace is less than 450 ℃ or more than 750 ℃. The percentage of cracks is reduced to 0 from 27.3% after using off-line cooling process.
出处
《鞍钢技术》
CAS
2015年第1期56-59,共4页
Angang Technology
关键词
低合金钢
连铸坯
晶界裂纹
low alloy steel
continuous casting slab
grain boundary crack
