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SS400连铸坯纵向裂纹研究

Yan Xinghua,Ge Ying,Sun Liheng

Hebei Metallurgy（2012）

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Abstract
分析了SS400出现纵向裂纹的原因为晶粒粗大,组织疏松,浇铸温度过高,浇铸过程中形成了成分偏析,拉速与保护渣粘度匹配不合理,浇铸过程中水口插入太深,导致保护渣被卷入板坯形成夹杂物,结晶器铜板厚度不合理。通过控制钢中[C]、[P]、[S],稳定拉速,浇铸速度,选择合适的结晶器及保护渣,控制二冷水的水量及强度,保持水口插入深度在钢液面10 mm以下,控制浇铸温度和板坯宽度等措施,纵向裂纹得到有效控制。
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Key words
effect,reason,longitudinal crack,SS400 continuous casting billet,measures
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